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HomeMy WebLinkAbout04-15-1999 Regular Meeting and Public Hearing of the La Porte Planning and Zoning Commission• PLANNING AND ZONING COMMISSION MINUTES OF APRIL 15,1999 Members Present Betty Waters, Jim Zoller, Michael Jetty, Dottie Kaminski, Hal Lawler (arrived 6:20 PM) Members Absent: Sandie Staniszewski, Melton Wolters City Staff Present: Planning Director Doug Kneupper, City Planner Masood Malik, Assistant City Attorney John Armstrong, Planning Secretary Peggy Lee 1. CALL TO ORDER. The meeting was called to order by Chairperson Waters at 6:05 PM. If. APPROVE MINUTES OF THE MARCH 18, 1999, REGULAR MEETING. Motion by Jim Zoller to approve the minutes of March 18, 1999. Second by Michael Jetty. All present were in favor and the motion passed. Hal Lawler was not present for the vote. III. OPEN PUBLIC HEARING TO CONSIDER ZONE CHANGE REQUEST #R98-00Z, WHICH HAS BEEN REQUESTED FOR THE PROPERTY LOCATED IN THE 1400, 1500, AND 1600 BLOCKS OF POLK STREET. THE APPLICANTS ARE SEEKING A ZONE CHANGE FROM GENERAL COMMERCIAL TO LIGHT INDUSTRIAL. Chairperson Waters opened the Public Hearing at 6:05 PM. The City Planner, Masood Malik, presented staffs report. The applicants, James R. Cartwright, Jack Humphrey, and L.R. Pfeiffer, requested a zone change from General Commercial to Light Industrial for lots 1-10 and 21- 30 of Blocks 717, 718, & 719, Town of La Porte, in the 1400, 1500, & 1600 Blocks of Polk Street. Staff reviewed the request and recommended Commission approval. A. PROPONENTS There were none. B. OPPONENTS Planning and Zoning CAssion Minutes of April 15, 1999 Page 2 of 5 There were none. IV. CLOSE PUBLIC HEARING. Chairperson Waters closed the Public Hearing at 6:10 PM. V. CONSIDER RECOMMENDATION TO CITY COUNCIL FOR ZONE CHANGE REQUEST #R98-002. Motion by Dottie Kaminski to recommend City Council approval of Zone Change Request #R98-002. Second by Jim Zoller. All present were in favor and the motion passed. Hal Lawler was not present for the vote. VI. CONSIDER FINAL PLAT OF TEXACO, WHICH IS TO BE LOCATED AT 9000 SPENCER HIGHWAY. Mr. Malik presented staffs report. The owner, James Scarborough, made application with the City for the Final Plat of 0.9 acres known as Texaco at Canada, located at 9000 Spencer Highway. Staff reviewed the request and recommended Commission approval. Motion by Michael Jetty to approve the Final Plat of Texaco at Canada with the inclusion of sidewalks noted on the plat. Second by Dottie Kaminski. All present were in favor and the motion passed. Hal Lawler was not present for the vote. VII. CONSIDER FINAL PLAT OF SUMMER WINDS SUBDIVISION SECTION III, WHICH IS TO BE LOCATED NORTH OF FAIRMONT PARKWAY. Chairperson Waters stated that the Commission would not be considering the Final Plat for Summer Winds, Section III, due to the fact that outstanding issues remained concerning the plat. VIII. CONSIDER FINAL PLAT OF BAYPORT NORTH INDUSTRIAL PARK, WHICH IS TO BE LOCATED AT UNDERWOOD ROAD SOUTH OF FAIRMONT PARKWAY WITHIHN EXTRATERRITORIAL JURISDICITION. The Commission was copied with a letter submitted by Bob Klassen, which requested the Commission delay consideration of the Final Plat until the May Planning and Zoning meeting. Planning and zoning Colession • Minutes of April 15, 1999 Page 3 of 5 IX. CONSIDER PRELIMINARY PLAT OF FAIRMONT OAKS APARTMENTS, WHICH IS TO BE LOCATED AT 9801 WEST FAIRMONT PARKWAY. Mr. Malik presented staffs report. The proposed Fairmont Oaks Apartments are to be located on a 12.175 acre tract of land situated in the William M. Jones Survey, A-482. The current zoning is R-3 (High Density Residential). The complex will contain 47 buildings with a total of 188 units. Staff reviewed the plat and recommended Commission approval. The Commission discussed the various impacts the project would have on surrounding neighborhoods such as vehicular/pedestrian traffic, noise, etc. Motion by Jim Zoller to approve the Preliminary Plat of Fairmont Oaks Apartments with the following conditions: 1. Sidewalks are deemed necessary along Underwood Road and Fairmont Parkway and should be noted on the Final Plat. 2. Landscaping is required along all four perimeters of the property. 3. Provide sufficient recreational facility within the development for the tenants. 4. Investigate the possibility of constructing a deceleration lane along Fairmont Parkway. Second by Michael Jetty. All were in favor and the motion passed. X. REVIEW A RADIO PLACEMENT PLAN TO INSTALL AND OPERATE A WIRELESS, DIGITAL, DATA COMMUNICATIONS RADIO NETWORK WITHIN PUBLIC RIGHTS -OF -WAY. Mr. Kneupper introduced Brian Goldman, Local Project Director for Metricom, Inc. Mr. Goldman gave a brief presentation about the service being proposed by Metricom. This data communications network provides intemet and e- mail access at extremely fast data rates. Mr. Goldman noted that anything communicated via telephone line could be communicated wireless through this system. For example, with this service a phone line would no longer be needed for a computer to have intemet access. Planning and Zoning Colession Minutes of April 15, 1999 Page 4 of 5 Mr. Goldman named several applications this service has helped provide for other cities: • Fire Departments, on the way to emergency scenes, use to download building plans. ■ Police Departments use to positively identify people in the field by using a camera devise and transmitting a signal to a database at the station. ■ Meter reading. • Traffic light control. Metricom has installed the network in the San Franciso Bay Area, Puget Sound in Seattle, Washington DC, a mini -network in Manhatten, as well as several airports and universities. They are in the process of negotiating rights -of -way in ten market areas; Houston, Chicago, Dallas, Fort Worth, Philadelphia, Boston, etc. and hope to build out across the entire United States. Comparable franchise fees will be attached. Mr. Goldman noted that the proposed pole -top radio locations shown on the map is based on City boundaries and approximately four radios per square mile. At the time of installation, an accurate map will be provided that will show locations approved by the light company, Metricom and the City. John Armstrong noted that technically, these radios are considered telecommunication facilities per the City's cell tower ordinance. In order to permit the radios, each would have to be dealt with on a case by case basis, with exorbitant fees to the applicant and height requirements that would require a variance in every instance. City staff did not want to burden the applicant, nor did they want to grant approval to the applicant without first presenting the request to the Planning and Zoning Commission. Mr. Armstrong indicated that a franchise approval would be sufficient in this case and if the Commission agreed, a franchise agreement would be presented to City Council for consideration. Motion by Michael Jetty to recommend City Council approval of a franchise agreement with Metricom, Inc. for a radio placement plan to install and operate a wireless, digital, data communications radio network within public rights -of -way. Second by Dottie Kaminski. All were in favor and the motion passed. Planning and Zoning con • Minutes of April 15,1999 Page 5 of 5 XI. STAFF REPORTS No staff reports. XII. ADJOURN Chairperson Waters declared the meeting adjourned at 7:00 PM. Respectfully submitted, Peggy Secretary Planning and Zoning Commission Approved on this 2& day of May, 1999. '-Wetly Watirs Chairperson Planning and Zoning Commission • 0 SPECIAL CONDITIONAL USE PERMIT REQUEST #99-002 ,CITY OF LA PORTE ! 9 L� U U 19 APPLICATION FOR U APR i 5 1999 SPECIAL CONDITIONAL USE PERMIT Application No.:: 9 9 - 06 ,-t, OFFICE USE ONLY: Fee: $100.00 Date Received: Lf—t Receipt No.: ' .5 Certified Plans Submitted: () General Plan () Major Development Site Plan () ..Minor Developement Site Plan () Preliminary Plat Person Making Request: n 1 (.l S l t'1 C G Address: City/State: BUSINESS NAME: PROPERTY ADDRESS: LEGAL DESCRIPTION: P. C . �� �( 2-0 1 C.GL PC) r+e ,TX 7 7 5% a Phone: 4 -1 d- D L4 Alliance r o45 1 -t'h r erL-t S-fvVi c e, 6/ocK 631 ; Lc-f o�-f f ZONE: L I SIC USE CATEGORY: Z 9 1 TYPE OF BUSINESS: �rzl-n+ rc C t. V e ru rc c l a W� ct D Y-) 4- /S - 9 c r) >�� z DATE OWNER OR AUTHORIZED GENT OFFICE USE ONLY Date of P & Z Public Hearing: A la �4 07-0 , 199 9 Recommendation: Y or N Date of City Council Meeting: Wkr /4 , / 991 Approved: Y or N Zone: ZIT This application is : Approved () Denied ( ) Permit No. CLP JOB # SC61 99- 00-Z (If Assigned Yet) Conditions: DATE ZONING ADMINISTRATOR 0 • A Meeting of the La Porte RECEIVED Planning and Zoning Commission (Type of Meeting) PLANNING Scheduled for May 20,1999 (Date of Meeting) to Consider Special Conditional Use Permit Request 99-002 (Type of Request) I have received notice of the above referenced public hearing. I am in FAVOR of granting this request for the following reasons: cl and I -the. bu6 iness J req u.e5-h n cj +he- perm ii , Cc� e have been op�ah +here- ;or I -Q0 oEar s anct -Feel otLr business 1 S u ab Ii h+ i rJ Lt,546a ion e, uen +h e fact -I- hQ e eal i n non - lamn�a�bl�, non - ha�-dous I am OPPOSED to granting this request for the following reasons: --� O ll s. u ,v-, c.,D k(i N e (please print) Signature 31 k-1 EJ vh C.{ Address u.54-o n i City, State, Zip A Meeting of the La Porte Planning and Zoning Commission (Type of Meeting) Scheduled for May 20,1999 (Date of Meeting) to Consider Special Conditional Use Permit Request 99-002 (Type of Request) RE EI E 1a 6 PLArNN6 I have received notice of the above referenced public hearing. I am in FAVOR of granting this request for the following reasons: yu 4 ram- n. Uyz ,4. rr o/2v d i'tx s - IQ i-/ 0 u /C- �J ,G i -,-5uKId .�. S 0U s jW� L eo-" I am OPPOSED to granting this request for the following reasons: / o Zz &"2 ADS-., AW Name (please t) Address 1 4��d AV Signature City, State, Zip Staff Report Industrial Gases May 20,1999 Special Conditional Use Permit #99-002 Reg u Special Conditional Use Permit Request #99-002 Requested By: Ms. Holly Sincox Requested For: Approximately 0.61 acre (26,600 sq. fL) described as lots 1 thru 8 and the adjoining west one half of the alley of Block 681, Nebraska Syndicate, as recorded in Volume 83, Page 345 of the Harris County Deed Records, J. Hunter Survey A-35, City of La Porte, Harris County, Texas. The property is located in the 300 Block of North 16m Street (Exhibit A). Present Zoning: Light Industrial (LI) Requested Use: Applicant is seeking a Special Conditional Use Permit (SCUP) to operate a business located at 318 N. le Street. Section 106-441 of the code of ordinance classifies this type of development as a Conditional Use. Background: Ms. Holly Sincox, the tenant, of the said property leased from Mr. Kenneth Higginbotham, the property owner, seeks approval of a permit to operate a business in a building located in the 300 Block of North 16* Street. On -site Recovery, Freon Reclamation, and Refrigerant sales within a Light Industrial Zone is described as a Conditional Use in Section 106-441 of the code of ordinances. Analysis: The code of ordinance Section 106-217 establishes the following review criteria and conditions for approval of Special Conditional Use Permits: • That the specific use will be compatible with and not injurious to the use and enjoyment of the other property, nor significantly diminish or impair property values within the immediate vicinity. • That the conditions placed on such use, as specified in each district, have been met by the applicant. • That the applicant has agreed to meet any additional conditions imposed, based on specific site constraints necessary m protect the public interest and welfare of the community. Industrial Gases • • SCU 99-002 Page 2 of 2 Staff would note that the site in question is surrounded on all sides by a Light Industrial Zone (Exhibit B). The said building is surrounded by Anthony Crane Rentals on the west, warehouses on the south and east, and a heavy wooded area on the north. The City's Comprehensive Plan addresses the following issues pertaining to the manufacturing, assembly, and warehousing within an Industrial Zone. Should be targeted in selected industrial areas. Should have good access to truck routes, hazardous material mutes & railroads. Should not be directly adjacent to residential areas. Should have good access to secondary and primary streets. With this in mind, it may be necessary to evaluate the character of the surrounding and adjacent areas. It is important to carefully consider the extent to which the existing use of the property may harm the value of the adjacent property such as excessive air pollution, water pollution, noise pollution, or other environmental issues. Given the nature and extent of industrial development in and around La Porte, the potential for a fire or explosion is a real risk to the community and its residents. Although, regulatory safeguards and industry initiatives help to reduce this risk but safety measures are necessary for safe operation of these businesses. However, the applicant has recognized the need for public safety and has constructed a two-hour firewall between this business and adjoining tenants, as requested by the Fire Marshal. Staff has found the request satisfies all applicable ordinance requirements. It is compatible with the goals and objectives of the Comprehensive Plan. Furthemiore, the facility is compatible with the surrounding properties and should not be injurious to the use, enjoyment or value of surrounding properties. Condusion: Based on the facts and considerations presented above, staff recommends granting Special Conditional Use Permit #SCU99-002 subject to the following conditions: A minor development site plan, prepared in accordance with the requirements of Development Ordinance 1444, shall be submitted for review and approval by the City. EPA permit complying with refrigerant recycling rules under Section 608 of the Clean Air Act, 1990 shall be finnished to the City. Landscaping of parking lot shall be required. The applicant shall pay the cost of public hearing. 626 11625 0 624 I 1623 11622 11621 635 636 637 638 639 640 fT 662 661 660 659 671 672 673 Pub is I F- Wor 698 697 696 70 08 709 335 F97 100 6491 1 96 684 75 IFN IIWIIM INN Iloll IF 734 1 1 733 0 732 1 1 731 1 1 730 1 1 729 724 1 1 723 1 1 -M2 1 1 721 1 1 48 95 93 74 76 C� 71 69 50 GC 52 47 45 0 • SUMMER WINDS SUBDIVISION SECTION III (FINAL PLAT) CITYOF LA PORTE PLAT/NIA.€ OR DEVELOPN EiNTSI)BA=AL APPLICATION (Allplat submittals to be rvAewed and considered for presentation to the Planning and Zoning Commission must be accompanied by this application and necessary documentation listed heerei a. Submittals willnot be revie'xed by staff without this application.) OFFICE USE ONLY DATE RECEVW: SUBMn-j AL :: RECENT t PLaNmc; a ZONING MEETING DATE: Type of Submittal: Gene_} Pyre: PIat (,� Final Plat (t�j t ; . 1 velopment Date: 3- o —; ,°qP+ erson(s): Phone: ZS(-q 10-ZOO Name of Propos opme"' rA Name of Dev open- LLG • hone Z of —473 —1o23Z Address of evel e. 1$ Number of ecrio�: ! = .Y = L • � �� Legal Desc, i tion i-uinQ Fee: _'_. .���� ..._ •� ��� Amount: j. ' D Checks should be made pay to theifC�«i La..-Pjte. r MAR 3 11999 t = I List All Other Contact Persons: iSY Name Address Phone Fax .. a Staff Report MW Summer Winds, Section III May 20,19" Final Plat Requested By: Earl W. Wilburn, Secretary Requested For: A 10.1878 Acres of land being Outlot 697 and portion of Outlot 698 in the W. B. Lawrence Subdivision, described in Volume 83, Page 344 of the Harris County Deed Records, out of the William M. Jones Survey A482, City of LaPorte, Harris County, Texas. Present Zoning: Low Density Residential (R 1) Requested Use: Residential Subdivision Background: Summer Winds is a residential subdivision located on the north side of Fairmont Parkway and west of Underwood Road (See Exhibit A). The Amended General Plan for Summer Winds subdivision was approved by the Commission on February 18, 1999 followed with the Preliminary Plat for Summer Winds Section III, which was approved by the Commission during their March 3,1999 meeting. Anal sis: Star, using Development Ordinance Section 4.04 and Appendix D as a guide, has reviewed Summer Winds Subdivision Section III Final Plat (See Exhibit B) and found it to be substantial compliance with applicable Ordinance requirements. The covenants for Section III have been reviewed by the City Attorney's office and found to satisfy Ordinance requirements. Utility construction plans have been reviewed and approved by Staff. Section 5.02 of the Development Ordinance empowers the Commission to require pedestrian sidewalks when it feels their inclusion will serve the public interest. Staff would recommend the inclusion of sidewalks within the subdivision. Responsibility for construction of the sidewalks should be specified by covenant Detention pond ownership and maintenance by the Homeowner's Association shall be stated on the final plat. Language in the covenants and on the face of the plat shall dedicate or transfer ownership of detention reserve to the Homeowner's Association. Summer Winds Section III consists of three blocks, 37 lots, and two restricted reserves. The restricted reserve "A" approximately 0.5 acre is reserved for detention pond and restricted reserve "B" approximately 0.1 acre is designated for utility easements. About four dwelling units per acre conform to the City's Comprehensive Plan. The proposed subdivision will be located in Park Zone 1. The City's Development Ordinance prohibits the dedication of parkland less than one acre in size; therefore, money in lieu of parkland would be required. Summer Winds Section I&inal Plat May 20, 1999 Page 2 of 2 Conclusion: Staff has reviewed Summer Winds Section III Final Plat and found it complies with the Development Ordinance. Staff recommends approval of Summer Winds Section III Final Plat with the provision that plat not be released for recordation until; 1. All construction improvements are complete. 2. Payment of $6,475.00 is made to the City in lieu of parkland dedication. 3. Payments of $2,498.88 and $200.75 are made to the City for street lighting services and street signage installation respectively. �a 1), Fol i moo+ At SECTION 3 SUMMER WINDS so - Sam" lip lip WT ,� ! C �+ FAIRMONT PARKWAY N.T.S. sae soo s+o EXHIBIT "A" e 0 ia so a no W sm - -- ---- ____.._..---- ,r .,.. .:. �. ...-.•.-;. .:.,• _y:� ;4r .�,: •Ua �LGti �f:- Ac. -_ 1 �._ ">•:" rHa, •Y.,e:r ._�.D" Xi.*f•:f .ia, c'l+t•.- .. r: :`• Y 'A ✓ ��� +s'�'�'-' - - -•-cr _YI. ,nl -. x ••'8: 4• LF -'r, 's .�i l'"+�,'� ..;, iy tS•t�, ..i*•� ti"•. �rsi?r,7,",4'._..,=t. MI. - - , �-..-.. -''h• -v ar.. .�x • _ •,• .. i ; xS .�.. . s. - : 3r` - : � 7 'Wc= =.r•�:. ,. ..'7•�i�_'�-•'. A �.W A+. �tn Jn� ..•�z , ... •,. ri " . , ,..e..., ... 1.........:' - - I _ „t lL 1 k 10.1879 ACRES OF LANDBEING OUTLOT 697 AND A PORTION OF OUTLOT 698THE NARRIS C171R4T7CDEEDBRECORUS, pUTCOFBTHE VILLIXI'AM MB JOKES ESURVE A-482, IN THE CITY OF LDPORTE, HARRIS COUNTY., .TEXAS AND BEING MOREcAww MI. PARTICULARLY DESCRIBED AS FOLLOWS.',F•� a iiTroRE COMMENCING FOR REFERENCE AT CITY OF LLPORTE SURVEY MARKER NUMBER - - ' W CITY -2'Crrr Oi U PORTE'-- 'AAtSURV[YMARKER,106 '.1, SURYFY MAMER' 109. - g109 LOCATED AT THE SOUTHWESTERLY CORNER OF THE SOUTHERLY LINE OFB6T4'09•-v 19t72e' - - qNw +. w.nrr r [ARLOV STREET AND THE WESTERLY LINE OF ANDRiCKS-STREET, INNING CANIFF ROAD STATE PLANE COORDINATES OF N - 684581.422, E - 3240953.967. -SOUTH " �" . 3' 7j-.. w7 Man•R,a -CENTRAL ZONE. USC L GS NORTH AMERICAN DATUM OF 19271-' <, aw cu•,•r •r WY.c�-°"THENCE S 74.54.28' E.'S37.53 FEET; TO A FOUND 3/4' IRON PIPE FWND �FOR THE NORTHWESTERLY CORNER AND THE POINT OF BEGNNING,5€4 E 57 J+I CT T00 THENCE N 87.00-45-E. 576.14 FEET. TO A SET 1/2' IRONRODN�S 03.04.24'. E ION 35.04' THENCE S 03'04.24' W. 35.04 FEET, TO THE BEGINNING DF A 25.00 FOOT0'11S;, ..RADIUS CURVE TO THE RiGHiti�'fl 1 : ; K- • '1213 THENCE SOUTHWESTERLY. ALONG THE ARC OF SAID CURVE. 39.34DFEET, sTHROUGH A CENTRAL ANGLEOF 90'09'08'. TO A SET 1/2' IRON RO r NKn=1 CB=S 42'00'10" W - ,:',. X 87.01•N" v R=25.00' �4 :.r.�, t� -: ''. •. - - 1 mo►s 67.43' THENCE' S 87004'44' W, 67.43 FEET, TO A SET 1/2' IRON Root _Ll y �.��, s. - -.y„ ter'• •_.I L=39.34• eX CL=35.40' THENCE S03.04.24•E, 846.37 FEET, TO A SET 1/2' IRON ROW LOCATION MAP I - 1'�100a4'.a T d •: i� ' 100 ` - 200300 ._•- R rs ' ' 1 f7 F "I a Arm THENCE S87.OS•22'W, 484.00 FEET. TO A SET 1/2' IRON RODt - El �'"si 1 -•i. &:• 1 1 ,ti KEY MAP - .a, --'.� ,.''"T ��� THENCE NO3'03'OiW, 905.72 FEET TO THE POINT OF BEGINNIN4 'o-tiY'Fy�+,,,'T•a@VC-IK,J.; • }-4 -'r/• _ -1•r x` J_ 4.K " L.T 19' ; - pJ - - - _ 3r� JG�d�e 1 - IOOJ 1 _ -y. ,�; 1_..s •--� I.•-1 Rw.r• T[115 PROPERTY LIES WITHIN ZONE '7C AREA OUTSIDE THE top YFJiR'FLODD PWN ;�:•. �t "r7 di 1'1-S 1 10 - - 3 _ r 1[-IL•--3J �� - ACCORDING TO THE F.LR.M.NO. 48201C0940 J. DATED. NOVEMBER 6. 1996•s` .ax. TAacq r '' t`r '4s9,i"✓'01. _ r - s#., s "rtI1pR aCOUNITIF aE .. zJ STATE KARRIS r •x e 1 I _ I N - W Sur"„« wYMx. LL.C.. s T•.m Umltw uebmy CR'^P.^y. trvewq . r. LL Ane lt.o,rgl, Je••Pn a Dew, Pre.W.rN _ _ - 'e•>:i�; •.'1 t - F Is�•� •'r 2. l'. _ y� aM Ean w. wRel.n ,R.. S.el.l«y, t.+r0 d,e..• a s...rw. e.n« M.•:, dt« .d«•e le m y n .•_� -Jr=. "I a O=n«• d IM 10.167E Aerw Uee1 eeaeri.e ti IM alwwe ane ler•Rdnq Pe, de M•IIy mr• ene e•IAOPaNT , r '''.� _.' J4; ..fk.,`e_y4:T'i ,. o IR . .: •' - >; r .`'� 1 - •x o - .\ V r •de •oeen++lel, d •oe vlow•ty aeeera.v to w IM.. eeekd�•. re+lrklelr• er,e nddlPm «, •o1e mow DEVELOPER: SUMMER WINDS LLC M - " f g'• > w we nM..rwNy� Wtlkale Ie iM uu d iM puMk lerwr, W sl•ml• f..r.p IM...1...1• emq„olw w PRESIDENT: JOSEPH G. DOW "'-� j •- 6�J Na I I 1 r ?"'' 1 ' ♦;1 f m P,,WHt dr•W). aley, wnA, .d« e«awe•. «aln•. •o. ft. ene Pllb•e P-Ae Wb IINr•«I SECRETARY: EARL W WILBURN, JR ryk � rt•• •xy ♦ leer .I ( a ] T' I« IM PAIPo••+ one eemAerelbn• II -A. _vWH I: ene M IIerA" bine eor••I•m: eW hell•. :OC ,M t '•i L- - trM• 21 I - rj twee.••«• one w.qr Io .«rent eM Iere•er ed•ne IM roM lA tM 1•IN •e e•ekeb0. ADDRESS: 4bADE: .AS70N 70503 ._ t 'G • C!J Ih'P I 7 ` Hk FURTHER. O«Wn ne.• on WgD•Ir,t1.0 pe•:w1 em.n,.M M f5)11••l .WILL rr«., a r - %" 1 ) 6 R1 m I« oubRe dIIY II,WP,wn F -' 1 _ 7 _22 I..nly Im) r..t eeo.e IM w.aNa wd w•«4 Ixd.e aepe.nt to AN o tK, N„ wwk ENGINEER: ESOR CONSULTING ENGINEERS -INC' �rA� NTa ruv rh it �I W ,e,, , 1x eM, b«,p - SURVEYOR:.ESOR CONSULTING ENGINEERS INC. - �st.} _ i3 4 ;I •xs. = psi ri N sF• 4 ( } wl FURTHER. O-A ee MIabY e•elw• tMt ee Pore•N d lone e•agrwwe m b1a en tb PId « - •T 4 '1 1 R M,•Y ■ ! _ " - M,1«M•e t« IM <an•Irvetbn d •nqw famiy reaiew,cn .•sNercea IMr•an one •Mi M L - 1= ta•r © .23 �Ie„e eoneRAW W d wen ...trklam I••e _ Is jimr-EN 7 I� " Y WRH 1lbXWw' "1 �R TAs[HRR r TESTIMONY WHEREOF. SuV=n•r WXWA, LAC.. a lmn Ltmxee L1oMMy Cemper,Y• nea cw•N IMae p•aeM• le W tXY iq. by J-0 G. Om. R'a P,AA d KL thWAWle 1~2, e, I .21: .e}1'1 dlml•d by R% srr•t _ EM W'iNm..k. 1999. 2 I ,11 < lA MAW tl'• ca1„rrwr tWd n«AWRe dO••e IN. de, d -x -'.r - - ue Aac •. -. .. 1F ti. '. - INnte ..�� �,R-. Stnw„« WOW.. LLC. - ,f•:- E' . r7aT- Lam" ► I J J R CITY APPROVING ALMIGARY CEMIEICATIDN 25 1 O �e,.1, 3 Y APPROVED •PVRiW sY• TrJN r•r ,4 By TITS K TO CFRfRr lwT TIME CTY PiJF+M SUBDIVISION ioMNO COMMISSION DE 711E COY TH - f .^. nNy I �i J.-,h G. Doe nN COIwEOMMANNC[ WITH T LAWS Or THE TSTA�a TEXAS-'-y I r,l1,1Y. •]1' - 1 P•"�""t - OF L.PORTE AND UTHOQUED THE RECORDING OF THIS PUT INS DAY OF IM t _ I - z d r - T - • Ness - • a I Nr G - 26 I meek; ?+ . u :. I - •2 T�xr i t r 1 - - ES er wi. Wlleun. Jr. �•. ' • pRECTOFI IePOR1E RANKING 28 27 ' 1 STATE Or TEXAS „EPARTMENT - .r 29. J - - �1± �'Wtyp emu--- --- COUNTY OF B[i011E ME. THE UNDERSIGNED AUTHORITY. ON 7WS DAY PERSONALLY APPEARED JDSEPH G. DOW ATTEST: _-_-- •� - 1 48,4 - -0 EARL W WRBORN• JR.• KNOWN 70 ME 70 BE TIME PERSONS WHOSE NAMES ARE SUBSCRIBED 10 CHAIRMAN. tIm-_ 9' +yU •.f.f -. / W �Z '22- y - N' •� BL I THE FOREGOING INSTRUMENT AND ACKNOWLEDGED TO ME THAT THEY EXECUTED THE SAME FOR THE LOPORIC. COY ENGINEER AND, ZON tc. C�MMISSON Y' •I Y �t M „�•' _ - slt-t -- - o^ 1 O L'f' PURPOSES AND CONSIDERATIONS THEREIN EXPRESSED. F ; H� Si''�n,fa 1YTJ~„t. .. +• r;�� -- \ - 19 1 21 ZZ..Ptt o75 14 13 12 uII n.il 'A 1 i0 I CMM UNDER MY TWA YA1 SEAL OF OFFICE. THIS _DAY OF _--__. 1995. �/s si - ATTEST. 14- \ " ' E-;I RESER 'a w COMMISSION EXPIRES _ �: F ., :1y,1 1 ♦ IS DED IN EC. 9 t= AND ZONIN, L•OMMIE PUNNING ♦ -_ AND ZONING. COMMISSION ,a RUBRIC DATE ROAD NOTAr/ PUBLIC r AND FOR THE STATE OF 1EltA5 +, •-r-+tK ilea iS' ` aYi //\ _ (EO' R.O.w.) - i I .F .--- I ,OSEPH G. Goe, OWNER AND HOLDER OF A LIEN AGAINST THE hT4i :.\ .. : ' r 1 i� " 3• \ � I l� i2 711 2n 1 ] ISwo LIEN BEING EVIDENCED IN ED Y IN KNOWN AS SUMMER WINDS SECTION.C.Q ONE. fT I I sA0 lEN BEING ETXKWCCD In INSTRUMENT a RECORD UDDER N.C.C.F. Ne SKEBEAS, el•- 72, Q'2� -<3qDF THE MORTGAGE RECORDS OF WARM COUF/IT. TEXAS DO HEREBY r NL TIxNO9 SUB- 1. B•nrh B. KMmen. CMn d IM Cauly Cwrf of HerrM Car4y.OPOINIE OUR INTEREST IN SAW PUT A D THE DEDICA" N4 AND RES"B"N NS SHOWN tM .Y1nin-'m-alrtmVN .,In .• <•rltlkalIMe '•i NERIN TO SAID PLAT AND WE HEREBY CONFIRM THAT WE ARE THE PRESENT OWNERS "F SAID LIEN d/k• on _ T96E d 'cbcY MAW r 1 �` ./♦ c, Hl'ICK 2 d NW MOP Rec«0a el INore'A Coady. I- ane dot, r•cereA'A a 19" K :k 10 AND INK NOT ASSIGNED THE SAME NOR ANY PART THEREOF. ocbek _- T -2�- ti F . • _ CNrA d IM Ceonl ; Cowl •-.,,F-_ STATE OF TEXAS COuNTT' OF Hens. Co,m1/. i• BEFORE ME. THE UNDERSIGNED AUTHORITY, ON TAPS DAY PERSONALLY APPEARED JOSE" C. DOW�-•2 ri h .yh •„ - KNOWN 10 ME TO BE THE PERSONS WHOSE NAMES ARE SUBSCRIBED 70 THE FOREGOING MSTRI1MENf D•Nb . ri , AND ACKNOWLEDGED TO ME THAT THEY EXECUTED THE SAME FOR THE PURPOSES AND CO MSDERAT10N4 s Y 'tJryUC.vj,i - THEREIN EXPRESSED. IR c - GR•EN UNDER MY 1WW AND SEAL OF OFFICE. THIS _DAY OF 1999. �.i • _ - .! MY COAIAIIBSIDN EXPIRES •• T +r ;)r•A'"-.. ' 3if .1 FINAL' PLAT OF A �f x r i ' ssl miry F NOTARY w11UC IN AND FOR THE STATE of TEXAS SUMMER -WINDS -SUBDIVISION*_, f w SECTION ":THREE ?= s'►R < A RESIDENTIAL -DEVELOPMENT is fr • JeM J. ReMRwT, r•pM•r•e W « 1M bn of the Slot, d T•rm to peak. IM pan d CONTAINING 37:'LOTS; IN 3 BLOCKS Ipr,e w1,eY•nC. ee Aa.•by F•nGTy Ilrl IM Piet occ«d•y reWe••HA IM r Wt• e1 a •IN.•r P..-.d AND TWO'"RESERVES '.�:-. ,--; a F• t 4 , ,T WW« my aup•r,MWn erW IMI e1 b-W«y eem«+. •'^9M poWt• one peN��. of eWw IK,n be.n. « HAVING 10.1878-ACRES OF.LAND ^- •r s be, mitt .IIn ri,•-el h Hen Iles rw• ml M•• then tnM" (7ft) ARCMs In n eM IMI InN Ienq� BEING OUTLOT 697 & A -PORTION'-0f OUTLOT 698 Plot aubdodWlY eWnwA•• .Hn IM r•eWem•d• m •wciMe M IM Ciy or La P«N 0•.•bpnnV,t Ord.ar,c•. -� tt y TO THE W. B. LAWRENCE SUBDIVISION VOLUME 83,-PAGE-344 H_C.D.R lr NOTES I. it- J. RolblewF. em regi•lnee oM•r iM Mend IM Slde d Ter• to poelke IM Welea•lo„ OUT OFTHE- r 1) DEED RESTRICTIONS OR RESTRIC7NE COVENANTS d eer.eYlq ene A«•bY IxnHy ttrl "•• obese det I. IMP• eM a« : one UKA aI b'°'bq'' WILLIAM M. JOKES SURVEY -A-482 t • ARE I R EFFECT AND ARE ES FILE AT THE COUNTY. e•'Ion<''a. erglm. cPr.e r•eww•. One eWtrd o 9E «e Aeelydely At- en IM PI•I. G0 CITY OF LoPORTE," HARRIS COUNTY. TEXAS '- COURTHOUSE. rr 2) DEVELOPER IS RESPONSIBLE FOR CONSTRUCTION AND INSTALLATION THIS 6 TD CENTSY THAT EARL w wILBURN. m.. Owern OR ATHOANTED AGENT Or THE OWNER A .,• OF SIDEWJIKS WITHIN THE SUBDIVISION. OF LAM BEING PUTTED OR SUBDIVIDED XNORW AS SUM w11W. SECTION THREE. APPROVED BY THE r�ElYi lE+ FILING DATE: MAY: 20, 1999 _ _ . COIMTY CLERK d'r- *�:;V APR 2 9 1999 r*r }) THE HOMEowNERS A55051ATION IS TO OWN n /41UMAIN THE L.N•DIT[ cnT• T'IAIN.W AND 2DNrc COMMISSION. AUTHOIIIZCD /- / .. I _ _ ' DETENTION POND AND ACCESS AREA ''� OF HARRIS C'OUMTY OR HIS AUTHORIZED DEPUTY 10 RFTRIN THE ORI4tNAL [CORDED MAP OR PUT OF .6re 3- I ' fir• Y SMW SU90m" ONLY 10 THE DIRECTOR OF THE CITY OF LePON1E'S PLANNING DEPARTMENT OR 10 If15 J gePflelwT R.P. JOIN 1. w00R10t1[Z -- - -. IIII v L �' 4).ALL' 1b 1RILITY EASEMENTS ME COMMON 115E EASEMENTS AUTIDRREo REPRESENTATIVE. WHO SHALL FILE SUCH ORIGINAL RECORDED Nw OR PUT r THE PERMANENT ii•e• Rpwlydlon No 631 "' :IM4 •• •� IaINX 7M0•A. tm tr i! II POWER,. (LLS. TELEPHONE. CABLE N, etc.:DEPARTMENT._ YXXA Y r t . _ _ - RECORDS NNt 7 _ O tH4G._ F.wn try Fs.� ♦ 10.3) W LE•1 INDICATES WATER., LINE _ EASEMENT - - - - I�i•-. to rry r.•rs. r E I M w A.M xtmF It D i ��.. Y" .. �50� Y rXW,tL ,XXr el•f1 • . N `. _ ��� ys I 61155E INDIUTES SANITARY SEWERFASEMEM OWNER OR AtrtIWINz[o AGENT CON jlJ( ♦ - _ - ' DIRECTOR LAPORTE _-- r1 y fy1�4[y ttPARTM[NT SUL7TNC ENGINEERS. INC. w Ir I- I ^w"' �:le'f6•+tIA^_p V!\%091JiC1CAD♦PLAt .i • FLOODPLAIN MANAGEMENT PLAN CITY OF LA PORTE, TX • "1City of La Porti; TEXAS May 14, 1999 City of La Porte Planning and Zoning Commission Members RE: Floodplain Management Plan for Community Rating System Since 1972, the City has participated in the National Flood Insurance Program (NFIP). The NFIP is a Federal program whereby affordable flood insurance is made available to property owners in participating communities. In 1997, over 2000 flood insurance policies were in effect in the City of La Porte. Under the NFIP, communities are required to adopt rules and enforce certain building restrictions to safeguard against new buildings being constructed in flood hazard areas. A supplement to the NFIP is the Community Rating System (CRS). This program is for communities that go beyond the minimum requirements of the NFIP and perform activities that further reduce the potential for flood hazards. Communities that participate in the CRS can enjoy discounts on their flood insurance premiums. Activities that are identified by the CRS include outreach projects where property owners are notified of potential flood hazards that may exist, and channel maintenance programs that require routine mowing and clearing of channels and drainage ditches. An important activity required by the CRS is for the City to develop and implement a FLOODPLAIN MANAGEMENT PLAN. This plan will identify areas that have experienced repetitive flood losses and recommend actions to decrease or eliminate the potential for future flooding. Staff has developed the attached FLOODPLAIN MANAGEMENT PLAN. Public input is required before final adoption of the PLAN. The May 20th P & Z meeting will be used to receive public input for the PLAN. Staff can then modify the plan, based on public comment, and present to City Council for consideration on June 14th. The City has made application to participate in the CRS program. The FLOODPLAIN MANAGEMENT PLAN and other activities need to be complete by the middle of June. FEMA will be reviewing our application and verifying the activities and services the City provides. Our goal is for FEMA to apply a 5% discount to all flood insurance policies in the City. Sincerely, Roxann Mackenzie HaY e I.T. P.O. Box 1115 • La Porte, Texas 77572-1115 • (713) 471-5020 • CITY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN DRAFT TABLE OF CONTENTS Page No. Introduction and Purpose 2 Public Involvement 3 Coordination with Other Agencies 4 Assess the Hazard 5 Assess the Problem 8 Set Goals 10 Review Possible Activities 11 Repetitive Loss Plan 13 Draft an Action Plan 18 Adopt the Plan 22 Implement, Evaluate and Revise 23 Appendix A: Map of Repetitive Loss Properties 24 Appendix B: Zoning Map 25 City of La Porte Planning Department, rmh Page 1 of 25 May 13, 1999 • CITY OF LA PORTS, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Introduction and Purpose The following document is the City of La Porte's Floodplain Management Plan. It is prepared to guide construction and development of the City, especially in Special Flood Hazard Areas. This document has also been prepared to qualify as a "Floodplain Management Plan" to be credited under the Community Rating System (CRS) of the National Flood Insurance Program (NFIP). Under the CRS, flood insurance rates will be reduced if the City implements activities that go beyond the minimum requirements of the NFIP. The City is currently submitting an application for CRS classification. The approach selected for preparing this plan was taken from Section 511 of the CRS Coordinator's Manual. This plan's section headings coincide with Section 511's headings. The Planning Department drafted this plan, with input from other City employees: Planning Department • Director • Engineer -In -Training • Professional Planner • Chief Building Official • Engineering Technician Public Works Department • Director • Superintendent of Streets • Drainage Maintenance Supervisor One public meeting was held to obtain public input on the draft plan. This public meeting was held in conjunction with the monthly Planning and Zoning Commission Meeting on May 20"', 1999. An advertisement/article was placed in the City's Newspaper, the Bayshore Sun on May 1&, 1999. This meeting is more than two weeks prior to the City Council meeting on June 14"', 1999, where the plan will be proposed to be officially adopted. Additionally, several working sessions were held that focused on hazard assessment, problem identification, mitigation goals, review of possible activities and work elements to be included in the proposed plan. This document focuses on short-range activities that can be accomplished in the immediate future, as well as long-range activities. The Floodplain Management Plan also takes a closer look at Repetitive Loss Areas, and develops a separate plan for mitigating issues in those specific areas. City of La Porte Page 2 of 25 Planning Department, rmh May 13, 1999 • CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Public Involvement Elements of the Public Participation Plan approved by the Council include: • Holding a public meeting on May 2&, 1999 to review findings from the Committee, to listen to citizen concerns and recommendations, and to describe how citizens can provide input to the Floodplain Management Plan. • Copies of the Draft Floodplain Management Plan were made available to the public at City Hall, the Library, and each fire station on May 20"', 1999. City of La Porte Page 3 of 25 Planning Department, rmh May 13, 19" • CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Coordination with Other Agencies The following organizations were involved in reviewing the Draft Floodplain Management Plan: • The City of La Porte ✓ Public Works Department ✓ Planning Department ✓ Parks and Recreation Department • City of La Porte's Planning & Zoning Commission. • State National Flood Insurance Program Coordinator • Harris County ✓ Flood Control District • FEMA Regional Office (Region VI) Each of these organizations were sent a copy of the City of La Porte Draft Floodplain Management Plan, and asked to provide written comments by May 31, 1999 for incorporation into the Draft Plan. City of La Porte Page 4 of 25 Planning Department, rmh May 13,1999 • CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Assess the Hazard Topography The City of La Porte has several major watersheds running through it, and is adjacent to Galveston Bay. Hurricanes The major threats to the City of La Porte are coastal storms and hurricanes. These events can produce three types of hazards: high winds, storm surge, and torrential rain. The following descriptions of the hazards has been taken from the Weather Channel's website, "Effects of a Hurricane," at http:/twww.weather.com/breaking_weather/encyclopedia/tropicaVeffect.html: Rainfall Induced Flooding The heavy rains associated with a tropical weather system are responsible not only for major flooding in areas where the storm initially strikes, but can also affect areas hundreds of miles from where the storm originally made landfall. During landfall, it is not uncommon for 5 to 10 inches to fall. If it is large and moving slowly, rainfall could be even more excessive. As the storm moves inland, and is down graded to a tropical depression, the continued circulation, tropical moisture, and topography can contribute to copious amounts of rainfall. Intense flooding can also occur from tropical depressions and storms that do not reach the intensity levels associated with hurricanes. Storm Surge The storm surge is perhaps the most dangerous and destructive part of a hurricane. The storm surge is a rapid rise in the level of the water that moves onto land as the eye of the storm makes landfall. Generally speaking, the stronger the hurricane, the greater the storm surge. As a hurricane approaches the coast, its winds drive water toward the shore. Once the edge of the storm reaches the shallow waters of the continental shelf, the water piles up. Winds of hurricane strength force the water onto the shore. At first, the water level climbs slowly, but as the eye of the storm approaches, water rises rapidly. Wave after wave hits the coast as tons of moving water hammer away at any stricture built on the coastline. "A cubic yard of water weighs about 1700 pounds and it's almost incompressible, " says John Hope, Tropical Coordinator at The Weather Channel. "You might just as well be hit with a solid object as to have this water smashing against a structure on a beach. " The storm surge is greater if a hurricane's track is perpendicular to the coastline, allowing the surge to build higher. The storm surge is also greater if the storm affects a bay or if it makes landfall at high tide. The greatest storm surge occurs to the right of where the eye makes landfall. The Winds The winds of a hurricane range from 74 miles per hour (65 knots) in a minimal storm to greater than 155 miles per hour (136 knots) in a catastrophic one. City of La Porte Page 5 of 25 Planning Department, rmh May 13,1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Often accurate readings of high wind gusts during iondfall are impossible because the anemometers at reporting wind stations are ripped from their foundations. Wnd is responsible for much of the stnrctural damage caused by hurricanes. High winds uproot trees and tear down power lines. The maximum winds from fast moving and powerful storms may remain high, even when the storm is well inland. Often this is actual wind speed combined with the speed of the storm. Flood Hazard Data During two 1998 tropical storms, Charley (Aug, 1998) and Frances (Sep, 1998) produced storm surges of 2.5 feet, and 6-8 feet, respectively. The Flood Insurance Rate Map (FIRM) for La Porte shows the Base Flood Elevation (BFE) as low as 15 feet for the VE area adjacent to Galveston Bay, and BFE of 12 feet for zones AE near the Bay. The FIRM designates two types of floodplain: A zone and V zone. All properties directly adjacent to Galveston Bay are designated as VE — "coastal high hazard area.' Properties farther inland are designated as AE. These properties are subject to flooding from either riverine or storm surge events. The coastal high hazard area is subject to the combination of storm surge and wave hazard. This area is where the waves during the base flood are at least three feet higher than the stillwater elevation. This is the most dangerous toward the south coast of La Porte (where VE zone is more prevalent). Related plans and studies include the following: • Clear Creek Regional Flood Control Plan (July 1991) — This study, prepared by Dannenbaum Engineering, addressed the tributaries of Clear Creek. however, A104-12 is not addressed in this study. • Hydrologic and Hydraulic Study for Interconnect of HCFCD Unit B112-02-00 to Unit B109-00-00 and HCFCD RN aortal Detention Site Unit 8512-01-00 (April 1997) — This report, prepared by Wilbur Smith Associates, describes the impacts of the diversion of Willow Springs Bayou (13112-02-00) to Spring Gully (13109-00-00). This report also presents the design of a regional detention site that provides flood protection for a portion of La Porte. • Study of Flood Control Improvements for HCFCD Unit F101 (September 1987) — This report, by Landev Engineers, recommended channel improvements that are being implemented. This study also indicates significant channel improvements from Galveston Bay upstream to Lomax School Road, with detention being required in the portions of the watershed north of SH 225. • Study of Flood Control Improvements for Little Cedar Bayou F216��-00� (September 1989) — Prepared by Epsey, Hutson & Associates. City of La Porte Page 6 of 25 Planning Deiparnneat, rmh May 13, 1999 C11Y OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Tropical Storm Frances Even though Frances was only rated at Tropical Storm strength, it did considerable damage to the City of La Porte in September of 1998: Sep 10-11 • 11 inches of rain in 24 hour period Sep 11-12 • 3 inches of rain in 24 hour period September 11th • Tornado touched down at 4:30am. • Damage to homes, trees and commerical businesses (see map). • No reported injuries. High Tides • Running four to six feet higher than normal Street Flooding • Extensive street flooding throughout entire City. • Severe flooding in Lomax area at 3am high tide. • Some homes may have had water damage. City Facilities Damage • Sylvan Beach Fishing Pier — damage to T-Head • Sylvan Beach Pavilion — lost glass window. Administrative Policy Decisions • Permit fees waived with damage associated with storm to residential and commerical properties. • Trash and debris cleanup limits waived. • Overtime authorized and 10-hour days permitted at Public Works Dept. Re titive Loss Areas Based on a printout from the Federal Emergency Management Agency dated August, 1998, La Porte has 55 repetitive loss properties. A repetitive loss property is defined as a property that two or more NFIP losses of at least $1,000 each have been paid since 1978. The City's repetitive loss properties are plotted following. It can be seen that the repetitive losses occur in areas not always prone to coastal storm surge, or found in the floodplain. Because repetitive flooding accounts for approximately 33% of all flood insurance claims payments, a community that wants a CRS classification must prepare a repetitive loss plan. This Floodplain Management Plan will address damage to all repetitive loss areas, and it is being prepared in accordance with CRS guidance. City of La Porte Page 7 of 25 Planning Department, rmh May 13, 1999 • MY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Assess the Problem Damage -Prone uildings Based on water meter records for May, 1999, La Porte has 9,109 single- family homes, 102 non-profit building, mufti -family units in 85 buildings, 574 commercial properties, and 53 city -owned buildings. Approximately 1400 buildings are in the base floodplain. Approximately 420 floodplain development permits have been issued (residence or business) since 1987. Development Trends Redevelopment will remain within the constraints of the City's zoning ordinance and floodplain ordinance. See zoning map (attached). Development Constraints There are two major constraints to development in the City: zoning and floodplain regulations. Zoning: The zoning ordinance follows the comprehensive plan, which allows the construction of compatible structures and uses. No new commercial development or multi -family housing will encroach into the single-family zones. Please see attached zoning map. Floodplain Regulations: The City has adopted an ordinance that meets the minimum NFIP rules. In A and V Zones, new buildings must be elevated above the base flood elevation. in A zones, commercial buildings can be floodproofed. In the V Zone, all new buildings must be elevated on open pilings or piers so that waves do not batter the building walls. Critical Facilities Several critical facilities have been identified. The most important facilities include the City of La Porte City Hall, Police Station, four Fire Stations, and Public Works. There are no medical facilities in La Porte, so preservation of the Fire Stations and its ambulances is vital for public health and safety. The main evacuation routes through the city are also considered critical facilities. Closing any of the major arteries greatly complicates the process of getting people to safety. State Highway 146 also serves as an evacuation route for communities to the south of La Porte. Nursing homes have also been designated as critical facilities: Happy Harbour Methodist Home, 1106 Bayshore Drive, and Fairmont House, 8727 Fairmont Parkway. These deserve special attention during evacuation to ensure that they have enough lead time to remove the residents. Natural Areas There are several areas worth preserving for their natural and beneficial function, but for sake of brevity, only one major area is mentioned in the plan. City of La Porte Page 8 of 25 Planning Department, rmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN The Big Island Slough from the City of La Porte, moves water into the Armand Bayou Nature Center. This 2,500-acre reserve offers a glimpse of three unique ecosystem. An estuarine bayou, all -grass coastal prairie and woodlands are preserved and nurtured here. This environmentally significant area has been designated as one of only four Texas State Coastal Preserves, and is one of the last bayous in the Houston area that is not channelized. The Armand Bayou Nature Center and other natural areas help reduce our flood damage by allowing floodwater to spread over a large area. This reduces flood velocities and provides flood storage to reduce peak flows downstream. Natural floodplains reduce wind and wave impacts, and their vegetation stabilizes soils during flooding. City of La Porte Page 9 of 25 Planning Department, rmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Set Goals Community needs and goals were identified when the comprehensive plan was adopted, based on that plan, the following goals are used to guide the Floodplain Management Plan: 1. Protect lives and property from the hazards of wind, surge, and rain. 2. Preserve the existing land use pattern. 3. Ensure continuous police, fire, ambulance, and other public services by repairing and protecting all City structures. 4. Establish safeguards for future development in repetitive loss areas and floodplains. City of La Porte Page 10 of 25 Planning Department, rmh May 13, 1999 • CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Review Possible Activities It is important that the City consider all possible ways to reduce flood losses and protect the natural areas. To ensure that the full range of alternatives were reviewed, the strategies and tools recommended by the Unified National Program for Floodplain Management (FEMA Publication 248, 1994) were used. The Unified National Program lists four strategies and numerous tools to prevent or reduce flood losses and to preserve and restore the natural resources and functions of floodplains. The strategies and tools are summarized below: Unified National Pr ram for Floodplain Management (FEMA Publication 248, 19941 Strategy 1: Modify human susceptibility to flood damage and disruption by avoiding hazardous, uneconomic, or unwise use of floodplains. Tools include: • Floodplain regulations, e.g. zoning, to steer development away from hazardous areas or natural areas deserving preservation; subdivision regulations; and building, health and sanitary codes. • Development and redevelopment polices on the design and location of public services, utilities, and critical facilities; land acquisition; open space preservation; and permanent relocation of buildings. • Floodproofing of new buildings and retrofitting of existing ones. • Flood forecasting, warning systems, and emergency plans that prepare people and property for flooding. • Preservation and restoration of the natural resources and functions of floodplains. Strategy 2: Modify the impact of flooding by assisting individuals and communities to prepare for, respond to, and recover from floods. Tools Include: • Information and education to assist self-help and protection measures. • Flood emergency measure to protect people and property during the flood. • Disaster assistance, flood insurance, and tax adjustments to reduce the financial impact of flooding. • Post flood recovery plans and programs to help people rebuild and implement mitigation measures to protect against future floods. Strategy 3: Modify flooding through projects that control floodwaters. Tools Include: • Dams and reservoirs that store excess waters upstream of development. • Dikes, levees, and floodwalls that keep waters away from developed areas. • Channel alterations that make the channel more efficient, so overbank flooding will be less frequent. • High flow diversions that send excess waters off to undeveloped areas. City of La Porte Page I I of 25 Planning Department, rmh May 13, 1999 • CITY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN • Land treatment to hold as much rain as possible where it falls so it can infiltrate instead of running off. • On -site detention measures to store excess runoff and flood flows. • Shoreline protection measures that protect inland development and account for the natural movement of shoreline features. Strategy 4: Preserve and restore the natural resources and functions of floodplains by maintaining and reestablishing floodplain environments in their natural state. Tools include: • Floodplain, wetlands, and coastal barrier resources regulation, e.g. zoning, to steer development away from hazardous areas or natural areas deserving preservation; subdivision regulations; and building, health and sanitary codes. • Development and redevelopment pollicies on the design and location of public services, utilities, and critical facilities; land acquisition; open space preservation; permanent relocation of buildings, restoration of floodplains and wetlands; and preservation of natural functions and habitats. • Information and education to make people aware of natural floodplain resources and functions and how to protect them. • Tax adjustment to provide a financial encouragement for leaving lands in their natural state. • Beach nourishment and dune building to protect inland development by maintaining the natural flood protection features. City of La Porte Page 12 of25 Planning Department, rmh May 13,1999 • CITY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Repetitive Loss Plan Summary La Porte has been identified as a repetitive loss community, with a total of fifty- five repetitive loss properties within the city limits. We have mapped the list of repetitive loss properties obtained from FEMA and a copy of the map is attached as Exhibit A. Flooding within the City is primarily associated with stream over- flow, tidal surges, and in some instances inadequate storm sewers or ditches. We have categorized these repetitive loss properties within four major areas, affecting 14 subdivisions. A detailed description of the flooding source as well as proposed solutions are as follows: West La Porte Area Brookglen/College View Spenwick/Spencer Highway Estates Lomax Are Denim & Diamonds Bayou Glen Monument Estates Pinegrove Valley Lomax Gardens Coastal La Porte Area Bayshore Park Sylvan Beach Broadway & "H" South La Porte Area Shady River Shady Oaks Bay Colony Former Bay M.U.D. Subdivisions City of La Porte Page 13 of 25 Planning eu� mh May 13, 1999 • CITY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN VIM. I'll Brookglen/College View Areas 1, 2 & 3 All of the drainage in this area is a curb and gutter system. The majority of the losses are on cul-de-sacs, where the water runs the length of the block to a catch basin. When Flood Control Ditch #B-112 crests, the water in the subdivision backs up, especially in the cul-de-sacs. Spenwick/Spencer Highway Estates Area 4 The flooding in this area was predominately caused by a 300-11oot ditch that was dug in the middle of the block from Bayer to Flood Control Ditch #B-112-02. Hams County originally dug the ditch on private property. In 1996, after the City of La Porte annexed this area, we did a complete reconstruction project. The City of La Porte obtained authority to dig out this channel therefore alleviating flooding problems. When B112-20 crests, though, there is still a slight delay in the run-off. Brookglen was annexed as part of the College View M.U.D. with Ordinance #1400 on 2/15/1985. Spencer Highway Estates was annexed as part of the Spenwick M.U.D. with Ordinance #1396 on 1/4/1984. These subdivisions were therefore built under the jurisdiction of Hams County and not subject to the regulations of the City. Upon annexation by the City of La Porte, all nonconformities with city ordinances are dismissed or "grandfathered." However, any substantial improvement or substantial damage to structures in the area now would require full compliance with the City's Flood Damage Prevention Ordinance. The subdivisions in west La Porte are subject to significant peak runoff rates from developed upstream areas. The City and HCFCD are studying mitigation action for this area. City of La Porte Page 14 of 25 Planning Department, rmh May 13, 1999 CPIY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Lomax Area The drainage in this area has been a problem for a long time. The Flood Control Ditch #F101-00-00 is being reconstructed in several phases. The problems on North "P" Street are due to the volume of water traveling through the Southern pacific outfall into the newly dug part of the F101 at Highway 146. The system cannot handle the volume of water at an above average rainfall. The City of La Porte has been experiencing flooding problems in the F101 watershed area for many years. These flooding problems occur during moderate rainfall events, when street flooding often makes roadways impassable. HCFCD along with the City of La Porte has been working to improve drainage in this area. The District completed construction of the ultimate channel downstream of SH 146 in 1993. The Department of Transportation has increased the capacity of F101 at SH 146, and HCFCD has also improved the section through Strang Yard. These improvements, along with other improvements to Unit F101400-00, should reduce the need for onsite detention in the future. Pinegrove Valley Area 8 The problem at 11818 and 11820 Fieldcrest was caused by the size of ditches on Fieldcrest Sens Road lacks a sufficient fall in elevation and the size of the culverts are limited. The City has reconstructed the system, which has helped the problem significantly. Hams County has plans to widen Sens Road and adding new culverts, will which also help alleviate the flooding. Lomax Area 10 & 7 The problems at 2226, 2801 and 1606 Sens Road are the same as North "H" Street: Flood Control Ditch #F101 gets full and the water backs -up. Bayou Glen Area 6 At 111 McCarty Lane, the ditch is cut on the maximum grade of 9% along Browning Lane to North "P" Street The water backs up at the end of North "P" Street due to Flood Control Ditch B106-06. The cleaning of this ditch would alleviate a lot of this problem and would help the Meadow Crest Subdivision. Harris County has infomned the Public Works Department that this ditch is on the list for reconstruction. 1419 Lemon Lane can also be included in this area. Pinegrove Valley Area 8&8 At 11012 and 12020 N. Avenue "L" the RCP along the full length of North Avenue "L" are not sized property and the ditch on the south side of the street backs -up. This is due to constriction at Sens Road. This problem should be alleviated with the Sens Road widening. North Avenue "L" falls within Harris County control. City of La Porte Page 15 of 25 Planning Department, rmh May 13, 1999 CITY OF LA PORTE, TX • CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Pinegrove Valley Area 8&9 The county is trying to alleviate the problem by installing a road crossing across Avenue "L" to move some of the water to the north side ditch. They are also cutting a lateral ditch from North Avenue "L" to Flood Control Ditch F101. Coastal La Porte Bayshore Park Area 12 923 Parkway does not have any specific problems. The water drains east to Bayshore, which has an outfall at F-212. In the past twenty years, it has flooded twice, both because of an above average rainfall. F-212 drains into Galveston Bay and tides affect the run-off. This year the Public Works Department installed a new pipe to replace a separated pipe that runs from Bayshore to Galveston Bay. This system is located at Parkway and Bayshore. Sylvan Beach Area 13 210 Cypress is a curb and gutter street It retains water as it is designed to do. Only infrequent torrential rainfall events may cause flooding in the area. Broadway & "H" Area 11 With regard to 816 S. 1`r, the drainage has just recently been maintained and the ditch on West "H" at South 1`` was re -designed to remove more of the water from the alley behind this residence. At 832 and 815 South Broadway, the water drains along Broadway via a curb and gutter system. A new system was installed along Broadway to "I." This consists of 6-foot box culverts to Fairmont Parkway. There is another catch basin on the east side of Broadway that drains water east to F-216-01 on the Arizona Street r.o.w. The system is underground from Broadway to East "G." The RCP from the junction box at the Arizona r.o.w. a East "F" to East "F" is separated and needs to be reset. Also, there is no fall on the open ditch portion to Park Street City of La Porte Page 16 of 25 Planning Departmeru, rmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN South Ira Porte Shady Oaks Area 15&16 The subdivisions in this part of La Porte are frequently inundated due to unseasonably high tides, and storm surges from tropical storms or hurricanes. Properties in this area can either be directly affected by high coastal waters, or affected by nearby in -land waterways that become backed up due to high tides. Properties in this area are also affected by subsidence, and some structures were built before the FIRM went into effect. However, any substantial improvement or substantial damage to structures in the area now would require full compliance with the City's Flood Damage Prevention Ordinance. Shady River Ares 14 The houses in this subdivision back-up to Taylor Bayou, and it crested due to high tides. The whole subdivision drains to Taylor Bayou. It is a curb and gutter system. When the bayou is full and tidal conditions are right, the streets can flood. Bay Colony Area 17 Water in this subdivision flows west along Bay Colony to the system on Sunrise that falls into a creek. This creek is controlled by tidal conditions from its outfall into the Bayport channel. Former Bay M.U.D. Subdivisions Through observations made by Rodney Cox of the Public Works Department, the drainage is adequate. During Topical Storm Frances during the summer of 1998, it was observed that at the Broadway ditch the water runs north to a small bayou that dumps into Taylor Bayou. This is affected by tidal conditions. The bayou spilled over, flooding Broadway. City of La Porte Page 17 of 25 Planning Department, rmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Draft an Action Plan Based on research and discussions, 11 activities (besides those mentioned above in the Repetitive Loss Plan) are recommended to meet the needs and goals listed previously. Activities 1-5 are short range, and Activity 6-11 are long-range solutions. These activities and this plan will be the subject of a public meeting on May 20"', 1999. A revised plan will be presented to the City Council for adoption on June 14t', 1999. The activities are listed below, along with who is responsible for them and when they should be completed. Most of these activities can be accomplished with staff resources. A budget is included for those activities that need funds. Following each recommended activity is a note on how it would be credited by the CRS. This plan includes activities that are not recognized by the CRS, but are nevertheless important to mitigate future losses and meet the City's needs and goals. Short Range Activities 1) Elevation Certificates on Computer Format • In August of 1999, FEMA will be issuing a new form of Elevation Certificates. Keeping Elevation Certificates in computer format makes them more readily accessible to City staff and citizens. • Responsible person: Engineer -in -Training • Deadline: Begin implementation August 1999 • CRS Credit: Points are credited for Activity 310 (Elevation Certificates) if the elevation certificate data for the City is kept and made available in computer format. 2) Public Information Program Strategy • The City will establish a public information outreach strategy team that includes representatives of agencies and organizations active in floodplain management and public information. The strategy team, minimum three people, will consist of someone familiar with the community's floodplain management program and at least one representative from outside the community's government. • A written document will be prepared that describes: => The local flood hazard. => The flood safety and property protection measure appropriate for that hazard. The flood -related public information activities currently being implemented within the community (including those by non - government agencies). => Goals for the community's public information program. => Process to be followed to monitor and evaluate the projects. • Responsible Person: Engineer -in -Training • Deadline: Have plan ready for review by November, 1999 City of La Porte Page 18 of 25 Planning Department, rmh May 13, 1999 CITY OF LA PORTE, TX 40 CRS ACTIVITY S 10 FLOODPLAIN MANAGEMENT PLAN • CRS Credit: Points are credited for activity 330, Outreach Project Pursuant to a public information program strategy. 3) Real Estate Agents' Brochure • Work with local area real estate agents to develop and hand out a brochure describing the community's flood hazard. • Person Responsible: Director of Planning • Deadline: January, 2000 • CRS Credit: Credit for Activity 340 can be achieved if real estate agents provide brochures or handouts that advise potential buyers to investigate the flood hazard for a property. 4) Ordinance for Storm Water Management • One of the greatest problems of floodplain management in urbanizing areas in the increase in peak flow caused by watershed development. As forest, fields and farms are covered by impermeable surfaces, such as streets, rooftops and parking lots, more rain runs off at a faster rate. When an area is urbanized, the rate of runoff can increase five -fold or more. A new ordinance addressing the following issues would alleviate this problem: Regulating developments on a case -by -case basis to ensure that the peak flow of stormwater runoff from each site will be no greater than the runoff from the site before it was developed. => All developments (no matter the size) will be regulated. => Detention is designed for greater than 10-year storm, but smaller than 100-year storm. => City inspects private stormwater facilities and has regulatory authority to require the owners to perform appropriate maintenance. => Regulations require that, as a condition of building permit, applicant must prepare site plan that accounts for local drainage from and onto adjoining properties. Regulations require new developments of 5 acres or more to include in the design of their stormwater management facilities appropriate "best management practices" that will improve the quality of surface water. • Responsible Person: Director of Planning • Deadline: Draft revisions should be presented to City Council by August, 1999. • CRS Credit: Credit for Activity 450 (Stormwater Management) is provided for adopting an ordinance with the above regulations. 5) Revise City's Building Code • The state has recently published new recommended guidelines for protection buildings from damage by hurricanes. Other higher regulatory standards are recommended by the CRS. These should be reviewed and the following amendments should be incorporated into the Building Code and/or Flood Development Ordinance: City of La Porte Page 19 of 25 Pbuning Department, rmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY S 10 FLOODPLAIN MANAGEMENT PLAN => Raise the minimum flood protection level from the base flood elevation (BFE) to eighteen inches about the BFE. All substantially damaged buildings and new buildings must be at or above this level. Prohibit fill within the floodplain and floodway, or new developments are required to provide compensatory storage at hydraulically equivalent sites. Count improvements to building cumulatively so that eventually all buildings will be brought up to flood protection standards. • Responsible Person: Chief Building Official • Deadline: Draft revisions should be presented to City Council by September, 1999. • CRS Credit: All of the recommended changes are credited under Activity 430 (Higher Regulatory Standards). Long -Range Activities 6) City Newsletter — Floodplain Outreach • A City Newsletter would allow the City staff and Council to communicate effectively with its citizens, taxpayers and voters. Every issue could contain a different article on floodplain hazards, and the services available to citizens at City Hall. • Deadline: 2000 • CRS Credit: Credit would be given through Activity 330. An outreach project to the City must be conducted annually to continue participation in the CRS. 7) Flood Data Maintenance • Input FIRM data into Utility Mapping Drawings. Placing FIRM data on the CAD system can allow for information to be updated electronically and can display or print a current map. • Responsible Person: Drafting Department • Deadline: 2000 • CRS Credit: Credit for Activity 440 can be provided for implementing digital systems that improve access, quality, and/or ease of updating flood data within the community. S) Preserve Open Space • One of the best ways to prevent flood damage is to keep floodprone areas free from development. In addition to flood protection benefits, preserving open space can greatly enhance the natural and beneficial function that floodplains serve. • Responsible Person: Director of Parks & Recreation • CRS Credit: Credit for Activity 420 can be provided for keeping vacant floodplain lands open. This can be done by keeping the land publicly owned (e.g., a park or golf course), or by regulating development so that there will be no new buildings or filling on the land. 9) Maximize Interagency Coordination City of La Porte Page 20 of 25 Planning Department, mih May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN • The City should maximize interagency coordination, especially with the Harris County Flood Control District (HCFCD) and TxDOT. This includes setting up regular meetings with HCFCD to review the City's priorities for drainage improvements. These meetings will also aid in targeting areas that need infrastructure improvements. 10)City's Hurricane Warning & Response Plan • There is still room for improvement of the City's hurricane warning and response plan. Special attention should be given to warning and evacuating the critical facilities, getting coastal residents to evacuate and 11)Emergency Operations Center (EOC) • The EOC's operation is vital to the City. A flood -free site needs to be evaluated. • Responsible Person: • Support Agencies: • Deadline: • CRS Credit: None. However, if the City wants CRS credit for protecting critical facilities to the 500-year flood level (Activity 430 — Higher Regulatory Standards), it must enforce the provisions on its own construction projects. City of La Porte Page 21 of 25 Planning Dgwfinent, tmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Adopt the Plan This plan will be presented to he City of La Porte City Council for formal consideration on June 14t", 1999. City of La Porte Page 22 of 25 Planning Department, rmh May 13, 1999 • CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Implement, Evaluate and Revise Implementation of the activities recommended by this plan needs to be monitored so that the deadlines do not slip. A tracking system is needed to allow the Planning Department to evaluate progress and revise the activities as necessary. • Responsible Person: Director of Planning • Support Agencies: Each person responsible for other activities. • Deadline: Each responsible person should report to the Director of Planning by the last day of each quarter. The Director of Planning will show progress in the Planning Department's Quarterly Report. The report will review progress and recommend changes as needed. City of La Porte Page 23 of 25 PWming Depailmc rt, tmh May 13, 1999 CITY OF LA PORTE, TX CRS ACTIVITY 510 FLOODPLAIN MANAGEMENT PLAN Appendix A: Map of Repetitive Loss Properties, with FIRM overlay City of La Porte Page 24 of 25 Planning Department, tmh May 13, 1999 • CH Y OF LA PORTE, TX • CRS ACTIVTIY 510 FLOODPLAIN MANAGEMENT PLAN Appendix B: Zoning Map City of La Porte Page 25 of 25 Planning DepaMeM rmh May 13,1999 EEL imit 11 IP4;lv t�pgm- z L R_i 3 al FIX K-2 &o 0 0 o 0 0 3 0 w C o� GC NC R-3 SPENCER HWY. ----GC NC ORD 1501CC REZONED FROM R-1 TO LC BS 1 1/11/99 ORD 1501♦ REZONED FROM R-I t R-2 TO NC BS I/26/97 DRD ISOII P11.B FROM RC TO LC BS X/22/96 BAD 15CIR REZONED FRO. ME TO PUB BS 6/6/9M F v r MV 0130193 .. 1501. 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LEGEND MH MANUFACTURED HOU5ING R I LOW DEN5ITY RE51DENTIAL R 2 MEDIUM DEN5ITY RE51DENTIAL R-3 HIGH DEN5ITY RE51DENTIAL NC NEIGHBORHOOD COMMERCIAL GC GENERAL COMMERCIAL BI BU51NE551NDU5TRIAL LI LIGHT INDU5TIRAL HI HEAVY INDU5TRIAL PUD PLANNED UNIT DEVELOPMENT ADDRE55 BLOCK DRAI NAGEWAY ZONING CITY OF LA PORTE ZONING MAP WPM BY: STEALIND DESIGN: APPROVED: FILE No.: SCALE: I. 2 1600- DATE Iro7 TOP& SHEET I OF I 0 DRAINAGE CRITERIA • Memo 1b: Planning and zoning Commission From: Doug Kneupper, Planning Direeto CC: Date: 05/14/99 Re: Drainage Criteria The City s Development Ordinance refers to a Public Improvement Criteria Manual (PICM). The PICM is a document, separate from the Development Ordinance, that provides guidance and direction regarding the design and construction of streets, sidewalks, water, sewer, and drainage systems; all the components that are constructed during a typical development. Staff is seeking the adoption of the attached Drainage Criteria Chapter to be a part of the PICM. The document is in draft form and has been distributed to engineering companies that work in La Porte. In addition, our technical staff is reviewing the document Once adopted, the Drainage Criteria Chapter will be a specific guide for developers, engineers, and staff to use while preparing site plans, subdivisions, and construction drawings. Staff intends to prepare additional chapters of the PICM that deal with other areas of construction. 0 page 1 • DRAFT 5.1 General Provisions Drainage Criteria for development within the City of La Porte, and where applicable within La Porte's Extraterritorial Jurisdiction (E.T.J.) is dependent upon the size and type of development, the conditions within the individual watershed, the conditions or design of the receiving stream, bayou, channel, roadside swale, culvert, or roadway. The basic objective of this policy is to minimize the threat of flooding to areas within the City and its E.T.J. and to minimize the effect of continued development on individual watersheds. The City believes that the best long-term means of accomplishing its objective is a continued program of improvement and extension of the Harris County Flood Control District's system of open channels. This statement recognizes the technical reality that an essential prerequisite to an effective flood control program is a system of open channels capable of carrying storm runoff of any type in Harris County to Galveston Bay without adversely impacting existing urban areas adjacent to the channels. 2. The City recognizes that both the District's and City's existing open channel system is, in many instances, inadequate to accomplish the goal of eliminating existing flooding conditions for existing levels of urban development, or for ultimate development in the watershed. 3. The City therefore recommends that where required, certain additional flood control facilities be utilized to supplement the open channel system. Such flood control facilities shall be designed to preclude flooding in areas that do not presently flood and not increase flood levels where flooding now occurs. Specifically, the City supports the use of storm water detention to supplement the open channel system until long-term channel improvements can be completed, or as permanent facilities where additional open channel improvements are not feasible. 5.1.1 All the drainage plans and construction shall meet or exceed the requirements of the City of LaPorte, Harris County Flood Control, Harris County, TxDOT, or any other entities having jurisdiction over a facility (i.e. roadway, channel, etc.). 5.1.2 Unless otherwise provided for in these policies, development shall follow the Harris County Flood Control District Criteria Manual for the design of Flood Control and Drainage Facilities in Harris County, Texas. 5.1.3 If application of the policies and criteria contained in this document conflict with the City's duties under the Flood Hazard Prevention Ordinance, the regulations of the Flood Hazard Prevention Ordinance shall apply. 5.1.4 Drainage structures shall be constructed in such locations and of such size and dimensions to adequately serve the development and the contributing drainage area. In new developments, the developer shall provide all the necessary easements and rights - of -way required for drainage structures, including storm sewer and open or lined channels. • • DRAFT 5.2 CONSTRUCTION PLAN REQUIREMENTS 5.2.1 A drainage map shall be included in the construction plans. The drainage area map shall include: A. Drainage areas, including areas draining from off -site onto or adjoining the project. B. Design storm runoff, based on the type of facility and storm frequency listed in Section 5.4. C. 100 - year runoff D. Route of overland flow including the overflow to a drainage outfall. E. Elevations for the 25-year and 100-year storms in the nearest FEMA modeled channel. F. Flow per inlet. G. Maximum ponding elevation 5.2.2 Detailed drainage calculations shall be submitted with the construction plans. 5.2.3 A lot grading plan should demonstrate that the finished grading plan will drain to approved collection and discharge points and that the overland flow of water from adjacent properties will not be impeded. 5.2.4 The hydraulic gradient for the design storm may be shown on the construction drawings. Calculations for the elevation of the hydraulic gradient shall be provided with the design storm drainage calculations. The tailwater elevations based on a 25 year frequency in the outfall channel shall be used for calculations of the hydraulic gradient. 5.3 USE OF PREVIOUSLY DESIGNED AND INSTALLED INFRASTRUCTURE Situations where previously installed infrastructure is in place but not yet utilized to its design capacity will be considered on a case by case basis. The developers engineer shall after consultation with the City, prepare a report that: a. outline the original design criteria. b. evaluates the impact of the original design on the receiving stream, adjoining properties and/or the 100 year Floodplain. Based on the report, the City Engineer may allow full or partial use of the previously installed infrastructure and may require it to be supplemented with detention or other facilities. • DRAFT 5.4 STORM FREQUENCY, RUNOFF AND DATUM A Storm Frequency All drainage improvements shall be designed for the following storm frequencies. Type of Facility Road Side Ditches and Culverts 5 year 024hr. Storm Sewers 5 year Ditches & Culverts Draining 100 acres and more 25 year Bridges 100 year Creeks 100 year Detention Facilities Refer to Secti Storm Runoff Design flow of storm water runoff is to be calculated using the Rational Method. The Rational Method is based on the direct relationship between rainfall and runoff, and the method is expressed by the following equation: Q = CIA, where Q is the storm flow at a given point in cubic feet per second (c.f.s.). C is a coefficient of runoff representing the ratio of rainfall to peak runoff. is the average intensity of rainfall in inches per hour for a period equal to the time of flow from the farthermost point of the drainage area to the point under consideration. The size and shape of the watershed must be determined for each installation. The area of each watershed may be determined through the use of planimetric-topographic maps of the area, supplemented by field surveys in areas where topographic data has changed or where the contour interval is insufficient to adequately determine the direction of flow. The outline of the drainage area contributing to the system being designed and outline of the sub -drainage area contributing to each inlet point shall be determined. When calculating the quantity of storm water runoff, rainfall intensity will be determined from the rainfall intensity, duration and frequency curves, shown in Figure 1. The storm frequency used for this determination will be according to the facility to be designed as listed in Section A. RUNOFF COEFICIENTS AND TIME OF CONCENTRATION • DRAFT Runoff coefficients, as shown in Table 2, shall be the minimum used, based on total development under existing land zoning regulations. Where land uses other than those listed in Table 1 are planned, a coefficient shall be developed utilizing values comparable to those shown. Larger coefficients may be used if considered appropriate to the project by the Engineer. The time of concentration is defined as the longest time, without unreasonable delay, that will be required for a drop of water to flow from the upper limit of a drainage area to the point of concentration. The time of concentration to any point in a storm drainage system is a combination of the "inlet time" and the time of flow in the drain. The inlet time is the time for water to flow over the surface of the ground to the storm drain inlet. Because the area tributary to most storm sewer inlets is relatively small, it is customary in practice to determine the inlet time on the basis of experience under similar conditions. Inlet time decreases as the slope and the imperviousness of the surface increase, and it increases as the distance over which the water has to travel and retention by the contact surfaces. Time of concentration shall be computed from Figure 2, and in no case shall the inlet time be more than the time shown in Table 2. Table 1 Runoff Coefficient Zone Zoning District Name licit R-1 Low Density Residential 0.50 R-2 Mid Density Residential 0.60 R-3 High Density Residential 0.80 MH Manufactured Housing District 0.55 NC Neighborhood Commercial District 0.80 GC General Commercial District 0.85 BI Business Industrial Park District 0.85 LI Light Industrial 0.85 HI Heavy Industrial 0.85 PUD Planned Unit Development District variable Miscellaneous Land Uses Maximum Inlet Time in Runoff Coefficient Land Use licit Church 0.70 to 0.90 School 0.50 to 0.90 Park 0.30 to 0.70 15 15 10 15 10 10 10 10 10 10 to 15 • • DRAFT C. Datum All drainage plans shall be prepared based on United States Geodetic Survey datum, 1978 adjustment, consistent with National Flood Insurance Program, Flood Insurance Study for the City of La Porte. 5.5. REQ Detention Basins - Unless otherwise provided for in Section Detention Basins will be required for developments within the following watersheds. Little Cedar Bayou - F216 Upstream of sta Big Island Slough - B 106 upstream of sta Deer Creek upstream of sta Etc Etc. Planning Department to do list Etc of other watersheds and locations 5.5.1 Design Standards for Detention Basins Detention requirements for developments less than 50 acres shall be according to the following table. For developed areas of 10 acres or less, the required volume equals the developed area times the appropriate storage coefficient. For areas greater than 10 acres and less than 50 acres the volume is determined by applying Harris County Flood Control District criteria for small watersheds. Developed Area 0 to 1 acres 1 to 3 acres 3 to 10 acres 10 to 50 acres Storage Coefficient 0.25 acre ft./acre 0.35 acre ft./acre 0.45 acre ft./acre per HCFCD criteria (see table For developments, which are larger than 50 acres, the detention facility criteria shall be approved by Harris County Flood Control District and the City Engineer. 5.5.2 Additional Standards For Detention Basins The detention facility shall be designed for easy maintenance. For smaller developments the designer is encouraged to use parking lots, underground piping, swales, greenspaces, etc. to achieve the volume required. • • DRAFT For larger developments every consideration shall be given to designing of the facility for multipurpose use, such as playgrounds, ballfields, miniparks, required greenspace, etc., to assure that maintenance will be accomplished. The design shall include the following: 1. an earthen detention basin shall have minimum side slopes of 3:1 and a minimum bottom width of ten feet; 2. the bottom of the detention basin shall have a minimum 0.25% cross slope to facilitate quick drainage. 3. a trickle channel of either buried pipe (minimum " diameter) or reinforced concrete shall be constructed through the basin bottom to accommodate low flow and allow fast drying. a.) for basins less than 20 feet wide (bottom width) a concrete trickle channel shall be a minimum of two foot wide and 4" thick. w I DEK ' E,rjO U44 FvR- UUT b.) for basins greater than 20 feet wide (bottom width) a concrete trickle channel shall be at least 10% of the bottom width and 6" thick. 4. a minimum 12 foot wide maintenance berm shall be provided around the perimeter of the detention facility. ingress and egress for maintenance including a dedicated right-of-way if required, shall be provided to the detention basin and clearly shown on the construction drawings or site plan and subdivision plat. 6. the detention basin, maintenance berm, and other associated right-of-way shall be hydro - mulched with Bermuda seed to facilitate full grass coverage. 7. parties responsible for maintenance of the detention facility must be shown on the plat and or plans. 8. No pumped detention systems will be allowed. 5.5.4 Ownership and Maintenance of Facilities The City will not accept maintenance of on site facilities that serve only one tract or development, unless it is determined to have other public benefits, is recommended by staff and approved by the Planning and Zoning Commission. Harris County Flood Control District may, at their discretion, accept maintenance of facilities, provided they are designed in accordance with the District's criteria manual. Requests for Harris County Flood Control District to assume maintenance of any facility should be coordinated with the city. • • DRAFT ADDITIONAL DESIGN REQUIItMENTS 5.6.1 Discharge Points The developer shall terminate all drainage improvements at a discharge point approved by the City. The developer shall design and construct such discharge point, or outlet, to prevent damage to or overflowing into adjacent property. The City may require creek improvement, channel lining, energy dissipaters or other improvements for such outlet to prevent erosion or increase the flow capacity. 5.6.2 Public Streets as Drainage Facilities 1. Maximum depth of water to be allowed in local streets at 5 year design flow shall be at the top of crown, or top of curb, whichever is least. 2. Maximum spread of water in collector streets at 5 year design flow shall allow for one clear lane of traffic (12 feet wide). 3. Maximum spread of water in arterial streets at 5 year design flow shall allow for two clear lanes of traffic (24 feet wide). 5.6.3 Drainage Channels and Structures 1. The developer shall install an underground storm drain on curb and gutter streets beginning at the point where the calculated storm water runoff is of such a quantity that it exceeds the height specified above. The developer shall construct the storm drain system from this point to an approved outlet. 2. For non -curb and gutter streets, the developer may use open channel (channel or ditch) methods to dispose of storm water specified above. Such channels may be in dedicated drainage easements outside the standard street right-of-way upon City approval of the location and alignment of such easements. Alternatively, the developer may widen the street right-of-way to accommodate an open channel of greater capacity than the standard street/ditch section. 3. If the developer locates the channel in a widened street right-of-way, the City shall approve the right-of-way width and channel configuration. The depth of flow in the channel shall not exceed one (1) foot as measured from the ditch flowline to the point on the roadway established as the high water level in this section. 4. The developer shall design and construct all channels to terminate at an approved outlet. 5.6.4 Habitable Structures The developer shall provide adequate means for storm water run-off in excess of the "design storm" capacity (i.e., 5, 10-year storm) to flow around habitable structures. a.) The developer shall provide a grading/drainage plan which shows that all building sites can provide a finished floor elevation: (1) At least one foot (P) above the top of the curb using the highest point along the portion of such curb fronting the building site, or (2) At least one foot (P) above the top of ditch elevation, using the highest point along the portion of such ditch fronting the building site. • 0 DRAFT (3) At least one foot above the ground elevation along all sides of the building site. b.) In addition to paragraph (a) above, the developer shall provide a grading/drainage plan which meets or exceeds the provisions of the Flood Hazard Prevention Ordinance. c.) The developer shall design and construct all streets to minimize any fill required to bring building pads into compliance with this Code. d.) Alternate methods of building protection may be accepted by the City upon submittal of detailed information, review and approval by the City Engineer. 5.6.5 Drainage System Criteria If an underground drainage system is required, and a 60-inch or smaller pipe will handle the design slow, pipe shall be used. If a 60-inch pipe is not adequate, the developer has the option to use concrete pipe or natural and/or a lined open drainage channel. If pipe is selected, the maximum allowable velocity shall be 8 fps in the pipe. Lining materials, if used, shall be approved by the City. 5.6.6 Public storm sewers are defined as sewers and appurtenances that provide drainage for a public right-of-way, or more than one private tract, and are located in public right-of-way or easement, private storm sewers provide internal drainage for a reserve or other tract. Private storm sewer connections to public storm sewers shall occur at a manhole or at the back of an inlet as approved by the Department of Planning. All private storm sewers within the public right-of- way shall be constructed in conformance with the Standards. 5.6.7 All construction shall conform with the City of La Porte Construction Details. 5.6.8 All storm sewers shall meet or exceed the requirements of the "Drainage Criteria Manual for Harris County, Texas" and the requirements of the City of LaPorte. 5.7 LOCATION OF STORM SEWER 5.7.1 Public storm sewers shall be located within a public street right-of-way or a storm sewer easement, dedicated to the public and adjoining a public street right-of-way. 5.7.2 Recommended alignment within a public street right-of-way. A. Boulevard pavement section with median - along centerline of the right-of-way. B. Undivided pavement section five feet (5) inside the right-of-way. For all storm sewer located in a public street right-of-way, a minimum of two -feet (2) shall be maintained inside the right-of-way line to the outside edge of the storm sewer unless otherwise accompanied by an adjacent easement. C. Alternate locations for a storm sewer will be permitted by the Department of Planning. 5.7.3 Recommend alignment within an exclusive storm sewer easement. A. Storm sewers placed in easements shall conform to the requirements of Section 2.4.5 B. Storm sewers within easements shall be placed no closer than five feet (5') measured from the outside edge of the pipe to the edge of an easement, except when adjoining another easement or public right-of-way where the distance may be reduced to two feet (T). The storm sewer shall be placed in the center of the easement. When the storm sewer easement adjoins a public right-of-way, the easement may be reduced to a minimum of ten feet (10') and the storm sewer may be aligned close to the right-of-way line, as long as required clearances are met, with specific approval of the Department of Planning. 5.8 STORM SEWER MATERIALS 5.8.1 Storm sewer and culvert pipe shall be precast reinforced concrete pipe, unless specifically approved by the Department of Planning. Concrete pipe shall be manufactured in conformance with the requirements of ASTM C 76, "Reinforced Concrete Culvert, Storm Drain, and Sewer Pipe", current revision. Reinforced concrete pipe shall be Class III or stronger. The design engineer shall provide for increased pipe strength when conditions of the proposed installation exceed the allowable load for Class III pipe. All concrete pipe constructed in water -bearing soil or forty -tow inches (42") in diameter or larger, shall have rubber gasket joints meeting the requirements of ANSI/ASTM C 443, "Joints for Circular Concrete Sewer and Culvert Pipe, Using Rubber Gaskets", current revision. Concrete pipe with a diameter of less than forty-two inches (42") may be installed using pipe with tongue and groove type joint and Ram-nek, or approved equal, as a joint filler. When specifically approved by the Department of Planning, reinforced concrete arch and elliptical pipe conforming to ASTM C506 and C507, respectively, current revision, may be installed in lieu of circular pipe. Reinforced concrete box culverts shall meet the minimum requirements of ASTM C789, "Precast Reinforced Concrete Box Sections for Culverts, Storm Drains, and Sewers", current revision. Pipe joints for arch and elliptical pipe and box culverts shall be sealed using Ram-tek or approved equal. For equals, refer to the City of La Porte Approved Products List. 5.8.2 Storm sewer outfalls into open channels shall be constructed using corrugated steel pipe. Corrugated steel pipe shall be manufactured in conformance with the requirements of AASHTO Designation M-36-82, current revision. Pipe material shall be Aluminized Steel Type 2, meeting the requirements of AASHTO Designation M-274-79I, current revision, or Pre -coated Galvanized Steel, AASHTO M-246, 10 mil coating on both sides. All pipe shall have a full double coating, Type A, in accordance with AASHTO Designation M-190, current revision. Pipe joints and fittings shall meet the minimum requirements of these specifications and shall have an 0-ring gasket seal meeting the requirements of AASHTO C-361, current revision. (See the City of La Porte Construction Details). 5.8.3 Storm sewer outfalls shall have slope protection to prevent erosion. Slope protection may be constructed of slope paving or rip rap. Slope paving shall be four -inch (4") five (5) sack concrete with six-inch by six-inch (6" x 6") welded wire mesh (W 14 x W 14) or three eighths inch (3/8") steel rebar on twenty -four -inch (24") centers, each way. Rip rap shall be a • DRAFT minimum of six-inch (6") broken concrete rubble with no exposed steel or well-rounded stone and shall be a minimum of eighteen inches (18") thick. Slope protection texturing shall be required where public access likely. Refer to the Construction Details for minimum dimensions. 5.8.4 Alternate materials are identified in the Approved Products List and may be used with specific approval from the Department of Planning. ADDITIONAL REQUIREMENTS 5.9.1 Minimum depth of a storm sewer (measured to the top of pipe) shall be twenty-four inches (24") below the top of curb or finished grade, whichever is lower. Minimum size storm sewer for main and inlet lead shall be eighteen inch (18"). 5.9.2 Storm sewers shall be bedded using cement stabilized sand (See specification in Section 4.2.3) as shown in the City of La Porte Construction Details. 5.9.3 Pipe requirements. A. Reinforced concrete pipe, as described in Section 5.2.1 shall meet or exceed the following minimum requirements: PIT E Class Maximum Cover (Ft) III 15' IV 30' Reinforced concrete pipe installed at a depth greater than thirty feet (30) shall be designed by the engineer for the specific installation and approved by the Department of Planning, Reinforced concrete pipe shall be designed in accordance with the American Concrete Pipe Association, "Concrete Pipe Design Manual", Maximum cover on the pipe shall be measured from the top of pipe to the ultimate finished grade or natural ground, whichever is greater. B. Corrugated steel pipe shall have a minimum thickness as follows: PIPE SIZE (Inches) Corrugations (Inches 242-2/3" X 1/2" 30- 482-2/3" X 1/21 54- 723t X 1" or 511 X 1" 78- 102311 X I" or 5" X I" M]NIMUM THICKNESS 0.052 0.064 0.064 0.079 Bedding for corrugated steel pipe shall be cement stabilized sand (See specification in Section 4.2.3) and shall have a minimum density of ninety-five percent (95%) Standard Proctor. Corrugated steel pipe less than or equal to fifty-four inches (54") in diameter and less than thirty feet (30) deep shall have the minimum thickness given above. Corrugated steel pipe larger than • • DRAFT C. Design storm flow in a street shall not exceed the capacity of the street, for the water surface equal to the top of curb and shall not exceed the inlet capacity. Design storm flow shall meet Harris County criteria. D. All bridges must be a minimum of eighteen inches (18") above the 100-year water surface elecation or in accordance with the Federal Emergency Management Agency (F. E. M. A.) regulations, latest revisions, or HCFCD requirements, whichever is greater. 5.9.4 Storm sewers less than forty-two inches (42") in diameter shall be constructed on a straight horizontal and vertical alignment between manholes. Storm sewers greater than or equal to forty-two inches (42") in diameter may be laid along a curve using manufactured bends of less than or equal to 11 1/4. 5.10 APPURTANCES 5.10.1 Manholes A. Manholes shall be placed at all changes in alignment, grade and size of the storm sewers; at the intersection of two or more storm sewers; at all inlet leads; and at the end of all storm sewers. B. Maximum spacing between manholes shall be six hundred feet (600') C. Manhole covers shall be cast iron, traffic bearing, type ring and cover with the words "storm sewer" cast into the cover. 5.10.2 Inlets A. Curb inlets shall be spaced and sized to intercept the calculated runoff for the design storm. The water surface elevation at the inlet shall be less than or equal to the top of curb for the design storm flow. B. Maximum travel distance of water in the street to a curb inlet shall be three hundred feet (300') on a major thoroughfare and in a commercial area. The maximum travel distance of water in the street permitted in a single-family residential area shall be six hundred (600'). C. No Valley Gutter without prior approval. D. Curb inlets should be located on the intersecting side street at intersections with a major thoroughfare. Locations at intersections shall be specifically approved by the Department of Planning. E. Grated inlets will not be permitted in an open ditch. DRAFT F. Backslope swale interceptors shall be placed in accordance with the requirements of Harris County. G. Curb inlets shall have grate inlet lids. Grate or Curb and Grate inlets shall not be allowed for residential subdivisions. Curb inlets shall be recessed, unless otherwise directed by the City Engineer. H. Backfill around inlets with 1.5 sacks per cubic yard of cement stabilized and to top of first stage inlet. 9 No RAFT U.1 oU. zo t;—J �u� Oa t1 toC `W J 40 4 ou c l000 SCO e< IL. — a0l 3GG o G;_ 30 3 ,.. 7C0 2 c'�(? MT.) V. 0.02 600- u . > Z �—QC3 25 2.5. 0; =4 400 CLao-S y t_ c� j QO:. 202 300 1-. AL; SOIL) L �jr � 2 200 vs �! 20 1.00 Z 15 t3 :il N i- /h OSJ3 � L Fa. R GRASS) ISO �r QO, =60 ( A%V.Gr.;;5) <~ c�}--G06 fit/!" y IOA Q O 100 ^� 080(:=iv.� G�cA55iT 20.0 tJi 90 t IM Z 10 • LO w. .. O ! � 0.10 x . S) V t 60 t LL. O sJ u: t. 7 0.7 40 of t 6 0.6 20 � E X A.*vI. P L Ov_RLA 'D FLVN GUTTE-R FLOW L = 2-00' ' L = 400' v.=G i::d. G^.1SS: n = p.` „S TIME OF CONCENTRATION FOR SURFACE FLOW 0.5 3 0.3 FIGURE 2