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HomeMy WebLinkAbout20170612172115692a. 7F—IFAY PROP. WORK (BY OTHERS] REF. HC#1608120064 —_ PROJECT# 00042-031 t I t a ' a : e' 6 a > � 'a .. •. —0 . a.—.— � �a _ _._. ems^' e P le N 03'00'58" W 2361.6Z�e- _ Site Data Table ' a : e' 6 a > � 'a .. •. —0 . a.—.— � �a _ _._. ems^' e P le N 03'00'58" W 2361.6Z�e- _ Site Data Table Amendment Table Name of Development: Port Crossing Rail Extension Phase II Description of Proposed Modifications/ construction includes: Date of Approval Type of Development: Proposed Construction is for Private Road and Storm Sewerand Detention Pond Legal Description of the Site: Called 18.928Acres Blueflash Express Inc. Vol. 3961, PG 259, H.C.D.R. Private 7" Concrete Roadway Construction Private Storm Sewer Address of site as assigned by the City 1600 S. 16th St., La Porte Texas 77571 Detention Pond Zoning of the site: LI & GC IStorm Water Lift Station Name of owner/or authorized representative National Property Holdings LP Name of developer and engineer Ward, Getz, & Associates LLP Harris County Appraisal District Property Numbers: 0440510000035, TRS 6B, 6C, 6D, 7A, 7b & 7C ABST625 R Pearsall NAICS number for use of the property: N/A Square footage of site proposed to be developed: 824,503 SQ. FT./ 18.928 Acre FLOODPLAIN STATEMENT NO PART OF THE SITE LIES WITHIN THE FEMA 100 YR FLOODPLAIN AS DELINEATED ON FEMA FIRM MAP NO.4$201CO945M DATED JAN. 6, 2017. SITE PLAN ACCURACY CERTIFICATE SITE PLAN ACCURACY CERTIFICATE 1, KEN SHEBLAK , AM REGISTERED UNDER THE LAWS OF THE STATE OF TEXAS TO PRACTICE THE PROFESSION OF ENGINEERING AND HEREBY CERTIFY THAT ABOVE SITE PLAN IS TRUE AND CORRECT; AND THAT ALL BEARINGS, DISTANCES. ANGLES, CURVE RADIUSES, AND CENTRAL ANGLES ARE ACCURATELY SHOWN ON THE PLAT. TEXAS REGISTRATION NO.79787 :• City Approving Authority Certificate: Minor Development Site Plan: This is to certify that on I Pit, day of I5�A^C 20_�l the City of La Porte, Texas, has approved this site plan and development of — Port Crossing Rail Extension_ in conformance with the ordinances of the City of La Porte. Phase 11'� By: Dire=ent City Planner /J � Engineering g Manager C v �'N C3CC god ��ppm F'44q ttW� k$� c FLOOD PLAIN NOTE & BENCHMARKS: ALL ELEVATIONS SHOWN HEREON ARE BASED ON FLOODPLAIN REFERENCE MARK NUMBER 060020, BEING A ALUMINUM DISK STAMPED RM F 216 BM-03. LOCATED ON THE FAIRMONT PARKWAY APPROX. 0.1 MILES EAST OF HIGHWAY 146. HAVING A PUBLISHED ELEVATION OF 12.97 FEET/NAVD88 (2001 ADJUSTED.) 0 100 200 TEMPORARY BENCHMARK 'N (T.B.A. A) 15.68' = BEING A BOX CUT ON AN STORM INLET LOCATED ON THE WEST SIDE OF POWELL ROAD ® ® AT THE INTERSECTION OF POWELL ROAD AND EXPORT DRIVE. (AS SCALE: 1" = 100' SHOWN HEREON) ACCORDING TO THE FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA), FLOOD INSURANCE RATE MAP (FIRM) FOR HARRIS COUNTY, TEXAS, MAP NO.48201 C0945M REVISED/DATED JANUARY 6, 2017, THE SUBJECT TRACT APPEARS TO LIE WITHIN SHADED ZONE "X". THIS DETERMINATION WAS DONE BY GRAPHIC PLOTTING AND IS APPROXIMATE ONLY, AND HAS NOT BEEN FIELD VERIFIED. THIS FLOOD STATEMENT DOES NOT IMPLY THAT THE PROPERTY OR i70.20p STRUCTURES THEREON WILL BE FREE FROM FLOODING OR FLOOD DAMAGE. ON RARE OCCASIONS FLOODS CAN AND WILL OCCUR AND 10.00, FLOOD HEIGHTS MAY BE INCREASED BY MAN-MADE OR NATURAL CONTRACTOR NOTE: IF ANY EXISTING UTILITIES REQUIRE AN ELEVATION ADJUSTMENT DUE TO THE PROPOSED DEVELOPMENT, THOSE ADJUSTMENTS WILL BE THE RESPONSIBILITY OF THE CONTRACTOR AT THE DEVELOPER'S/CONTRACTOR'S EXPENSE. THIS PERTAINS TO STORMWATER INLETS, MAIN OR MANHOLES, WATER OR SANITARY SEWER MAIN, SANITARY MANHOLES OR CLEANOUTS, FIRE HYDRANTS OR VALVE BOXES. ALL UTILITIES WILL BE ADJUSTED IN CONFORMANCE WITH CITY SPECIFICATIONS, b i CAUSES. SHEET NOTES: 7.21' DEMOLITION KEYNOTES STORM SEWER DEMOLITION: / 10 STORM SEWER TO BE REMOVED. 11 INLET / STUCTURE TO BE REMOVED. 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. (REF. SECTION 5.5.4 OF THE CITY'S PUBLIC IMPROVEMENTS CRITERIA MANUAL) RAIL LOGIX LA PORTE 1040 S. FM 565 3AYTOWN, TX 77523 332-373-7509 E r o PDRT W N NORTH EAST '-' MADISON FLINTROCK r = r D ¢ x �iA, m TY E r �t,P1N ! 9 C P� N m M IN SPENCER HIGHWA 06 C rOL $ S y0 ryr �q N A 4 q 9 N LA PERTE D D DOGWOOD Pop 27,910 n E f IDLEWOOD x z N MULBERRY F DLLINGSW00 r G 2r Q qP BIRCH MESQUITE x H v ry p 2 N ❑ � 3 a w y m r G N x w a FAIRMONT PKWYCR yZ0 N 3 Q Ie Porte o w CyR o eFp >< ee teryS Sys SO a GA D N Little F Rey, 4N c w W LK q p Cedar Bayou G4 FI e< jr v� Park q2e< Bay Forest w Golf Course SITE a GAL VICINITY MAP KEY MAP NO. 580 E ZIP CODE 77507 PAVEMENT DEMOLITION: 40 GRAVEL TO BE REMOVED 41 ASPHALT/CONCRETE TO BE REMOVED. MISCELLANEOUS DEMOLITION: 0DITCHISWALE TO BE REMOVED (MUCKED & FILLED) 0 (TO BE FILLED IN 6" LIFTS & COMPACTED TO STANDARD PROCTOR DENSITY) 51 FENCING TO BE REMOVED. 52 ELECTRICAL TO BE REMOVED 53 TRUCK SCALE & BUILDING TO BE REMOVED I REV I DESCRIPTION I DATE I iWC WARD, GETZ & ASSOCIATES, LLP CONSULTING ENGINEERS TEXAS REGISTERED ENGINEERING FIRM F-9756 2500 Tanglewilde, Suite 120 FIouston, Texas 77063 713.789.1900 SCALE I DESIGN I DRAWN 1"=100' SL JM SHEET C 1.0 .Q ,Q ' TRACT 1 � D 9.1321 ACRES 3 UM 9.1 RE PALLID DSSI ACRE TRACT,LP. PORT O.F. NO. LAND, LP. N.C.P.F. NO. Z0I0696 co o O R E S T R I C T E D RESERVE 0 =i fir CONTRACTOR TO SPOIL 22,230 CY FROM DETENTION EXCAVATION AT APPROXIMATE LOCATION (FILL TO 19.7 FT) 0 4:1 I% ff m o E $007MW P ?W17 RldRT-OF-W •;z B4� Pd. BB, H.dll.'k ,A - PROP.STM.SWR TG=16.80 + 24" t=12.00(N) i PROP.STM.SV TG=16.00 IT - PROP STM SWF 7 TG-16.80 24"t=11.66(N,S) z --p P J PTi---P--P- •=------P P- --P P P •� P ° P 7-P €` P s P'Q` e � .p T G PROP. RAIL EXTENSION • e s >, (BY OTHERS) .r a 're •'a .0 ° �PROP.STM.SWR.TY"A'YNL °Laz - -dsa.. _ _n�as.- ^'a"� fa _a. ,fad TG=17.00 A _.e_' r_>@ h : fe.� nfe PROP.STM.SWR. MH as 36"N° RM=62 a PROP .STM.SWR.TY"A"INL 42't=10.20(N) ...N 4 ' a' l • TG=16.80°.; ....;�.;...: ;.. .� / . . 0 �42.�;":t=9.83(S) . 24"t=11.23(S) -JaP 42"t=10.03(SN) „INL 30"PROP.STM.SWR.TY„A„INL'. 1 au �--�---1{�-- LVI�� 5 Y ' TG=16.80 _... .�"• -•2ez- 6- Y' -( a- � °1 �' -'- °-���as' - raN 36"t=10.72(S) LM fei>s 7epi rap° lap . a'n jail fzas �,...---•--� law .+ea I°2° '� F' H.SWR.� PROP.30" RCP STMSWR. PROP.30" HDPE STMSWR. PROP.36" HDPE STMSWR. PROP.36" HDPE STMSWR. 'PROP.42" HDPE STMSWR. f*1f PROP.42" HDPE STM.SW 8% -195 LF @ 0.15% -209 LF @ 0.11 % -209 LF @ 0.14% a -1sa ° LF 0. - 13/0 •-- �....� 209 LF "ja°'`+''� @ PROP.STM.SWR.TY"A"INLI->' -'r> PROP.STM.SWR.TY"A"INL '08 /0� TG=1T00 ffAr ` TG=16.80 301 11.00(N,S) -?iS- PROP.STM.SWR.TY"A"INL 36"t=10.49(S,N) „- a �. P_. myr. "HDPE STM.S -�- ' 36" t=11.00(N,S) - - TG=16.80 v m - �- -j -26LF @ 0.1 _ MH 36"t-8.45 S) i "A"INL- - B 0- -I- a PROP.STM.SWR.TY"A'INL - PROP.STM.SWR.TY"A"INL - �_ m - PROP.ST R M=7 00 ' g3�,�p� . PROP.STM.SWR.TY"A"INL ) PROP.STM.SWR.TY"A"11,1 ,g TG=16.80- wGir TG=t7 00 - gym- TG=16.80 - - _-_�___ 42"t=7 45(N SE) ' m " 15=11.20 S ?8"t=11.00(N) ` = 24"S 12"t=10.90(E)15 � 12"=40(E)2=12.00(E) 36"t=8.S - PROP.STM.SWR.TY"A"INL-P�ROP, .42"HDPE STMS' WR.„t=1t.80(N) •°1• •� --� mm - � - 24" t=10.50(N) 30"t=8.83(S)30t=9.10(N) 36"t=8.70(N) 42"t=8.00(N) TG=16.80 -113LF @ 0.10% ' �- - 42"t=7.80(N,S) / =PROP.15"HDPESTMSWRZ/PE STMSWR. PROP.24" HDPE STM.SWR.'PROP.30" HDPE STMSWR. vpROP.36"HDPE STMSWR. PROP.36"HDPE STMSWR. PROP.42"HDPE STMSWR. 0 95 LF @ 0.26 /o 197LF 0.23% a @ -205 LF 0.13%•` @� o --210 LF @ 0.11 /° ! -240 LF @ 0.12% _ - 0t/o o7 LF @ - - -- - PRORSTM.SWR_TY"A"INL = 11 _ N 03'00'58" W23 t.6 e TG=15.50 12"t=12.33(W) 00"o 6 A 10 \7PROPM. PROP.12" RCP STM.SWR. -73 LF 0.44% PROP.STM.SWR.TY"A"INL PROP.STM.SWR.TY"A"INL PROP.12" RCP STMSWR. = _ 1g09 e64 '1B @ 12't16.022 TG=16.00 ^73 LF @ 0.44% SWR.TY"A"INL - (V`) � 8 f T10 TG=16.00 12"t=10.75(E) PROP.42" HDPE STM.SWR. N" 0•F" I 12" 1 11.22(W) -131 LF @ 0.10% 6' UE. H.c.C..F. No. H4774z6 76 u.E. H.O.O.F. NO. H471426 PROP.STM.SWR.MH O RIM=17.30 42"t=9.67(S) PROP.12" RCP STM.SWR. 42"t=7.56(NW) H -74 LF @ 0.44% I I PO 40 �101n VO CROSS SECTION D-D 1__93.0' J o_ J1 � 1L 4 4 NOT TO SCALE CONTRACTOR TO CLEAR AND GRUB AREA OF SPOIL PRIOR TO PLACING MATERIAL ONSITE. TOPSOIL CAN BE USED TO LINE DETENTION BASIN AS NEEDED N n FLOOD PLAIN NOTE & BENCHMARKS: ALL ELEVATIONS SHOWN HEREON ARE BASED ON FLOODPLAIN REFERENCE MARK NUMBER 060020, BEING A ALUMINUM DISK STAMPED RM F 216 BM-03. LOCATED ON THE FAIRMONT PARKWAY o N APPROX. 0.1 MILES EAST OF HIGHWAY 146. HAVING A PUBLISHED y ELEVATION OF 12.97 FEET/NAVD88 (2001 ADJUSTED.) 0 100 200 TEMPORARY BENCHMARK'A' (T.B.A. A) 15.68' = BEING A BOX CUT ON m AN STORM INLET LOCATED ON THE WEST SIDE OF POWELL ROAD AT THE INTERSECTION OF POWELL ROAD AND EXPORT DRIVE. (AS $� SCALE: 1" = 100' SHOWN HEREON) ' ACCORDING TO THE FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA), FLOOD INSURANCE RATE MAP (FIRM) FOR HARRIS COUNTY, P MI s TEXAS MAP NO. 48201C0945M REVISED/DATED JANUARY 6, 2017, a ' m PROP.STM.SWR. '? THE SUBJECT TRACT APPEARS TO LIE WITHIN SHADED ZONE "X". ° BACKSLOPE INTERCEPTOR, -- THIS DETERMINATION WAS DONE BY GRAPHIC PLOTTING AND IS _as^.' _ -'°� �+ fa+ - .gas was •�-'`' = --TG=16.46 Asa--- �aaa APPROXIMATE ONLY, AND HAS NOT BEEN FIELD VERIFIED. THIS (REF. SHEET 8.2) PROP.STM.SWR. ;w �= FLOOD STATEMENT DOES NOT IMPLY THAT THE PROPERTY OR �y z t a.p BACKSLOPE INTERCEPTOR �� STRUCTURES THEREON WILL BE FREE FROM FLOODING OR FLOOD fv T. - TG=16.73 DAMAGE. ON RARE OCCASIONS FLOODS CAN AND WILL OCCUR AND ' e* P ' m REF. SHEET 8 ( ) FLOOD HEIGHTS MAY BE INCREASED BY MAN-MADE OR NATURAL CAUSES. PROP.42" H DPE STMSWR. � � o •a ' .. SHEET EET NOTES: O -95LF @ 0.11% N PROP 24" HDPE STM SWR `7 `/ -62LF SLOE 0.20° FL=3.23 7 ' PROP. RIP -RAP •q, ryP _ (REF. SHEET 8.1) �% w PROP.42"HDPE STMSWR.:' o -62LF @ 0.10% 3. 4' - a PROP.24"HDPE STMSWR. -62LF 42" t=5.20 0 oo e+ PROP.STM.SWR. •Q PROP.STM.SWR.TY"A"INL BACKSLOPE INTERCEPTOR TG=16.73 TG=16.49. 42" t=7.45(S) (REF. SHEET 8.2) PROP.24" HDPE STMSWR. -4 L 42"t=5.26(N) -- _---- _---- _-- -62LF ' _ 1. UTILITIES SHOWN ARE APPROXIMATE. CONTRACTOR TO FIELD VERIFY EXISTING UTILITY LOCATIONS PRIOR TO CONSTRUCTION AND IMMEDIATELY NOTIFY ENGINEER OF ANY CONFLICT OR DISCREPANCIES. 2. CONTRACTOR TO COORDINATE WITH UTILITY COMPANIES FOR SERVICE ORIGINATION AND CONNECTION. 3. CONTRACTOR SHALL TAKE CARE NOT TO DAMAGE ANY EXISTING ITEMS ONSITE. 4. CONTRACTOR SHALL KEEP THE SITE CLEAN OF DEBRIS AND ANY EROSION CONTROL MEASURES ARE ADEQUATELY PLACED. 5. CONTRACTOR TO COORDINATE LOCATIONS OF UNDERGROUND IRRIGATION SLEEVING PRIOR TO PAVING. SEE LANDSCAPE PLANS. 6. CONTRACTOR TO COORDINATE LOCATIONS OF UNDERGROUND CONDUIT FOR SITE LIGHTING PRIOR TO PAVING. 7. ALL CONSTRUCTION OPERATIONS SHALL BE ACCOMPLISHED IN ACCORDANCE WITH APPLICABLE REGULATIONS OF THE U.S. OCCUPATIONAL HEALTH AND SAFETY ADMINISTRATION. COPIES OF OSHA STANDARDS MAY BE PURCHASED FROM THE U.S. GOVERNMENT PRINTING OFFICE. INFORMATION AND RELATED REFERENCE MATERIALS MAY BE PURCHASED FROM OSHA, 903 SAN JACINTO, RM 319, AUSTIN, TX. 78701. TEL: (512) 916-5783. 8. ALL SANITARY SEWERS CROSSING WATER LINES WITH A 6 INCHES TO 9 FEET CLEARANCE SHALL HAVE A MINIMUM OF 18' JOINT OF 150 P.S.I. SDR 26 PVC PIPE MEETING ASTM SPECIFICATION D2241 CENTERED ON WATER LINE. WHEN WATER LINE IS BELOW SANITARY SEWER PROVIDE MINIMUM 2 FOOT SEPARATION. 9. REFERENCE MEP PLANS FOR UTILITY CONDUIT LOCATIONS. 10. ALL STORM PROPOSED UNDER FUTURE RAIL SHALL BE RCP CONFORMING TO AREMA COOPER E80 LOADING. GRADING NOTES: 1. ALL SPOT ELEVATIONS ARE TO TOP OF PAVEMENT UNLESS OTHERWISE NOTED. 2. ALL SIDEWALKS AND ACCESSIBLE ROUTES, INCLUDING DRIVEWAY CROSSWALKS, SHALL CONFORM TO ALL APPLICABLE AMERICANS WITH DISABILITIES ACT STANDARDS AND THE TEXAS ACCESSIBILITY STANDARDS. IF ANY DISCREPANCY IS DISCOVERED, THE CONTRACTOR SHALL NOTIFY THE ENGINEER PRIOR TO POURING ANY PAVEMENT, 3. ALL SIDEWALKS AND ACCESSIBLE ROUTES, INCLUDING DRIVEWAY CROSSWALKS, SHALL NOT EXCEED A RUNNING SLOPE OF 5% (1:20) WITHOUT A RAMP, AND SHALL NOT EXCEED A 20CROSS SLOPE (1:50). 4. THE ACCESSIBLE PARKING AND PASSENGER LOADING AREAS SHALL NOT EXCEED A SLOPE OF 2% (1:50) IN ANY DIRECTION. 5. ALL EXISTING APPURTENANCES ON SITE SHALL BE ADJUSTED TO PROPOSED GRADE AS APPLICABLE. 6. CONTRACTOR SHALL REFERENCE GEOTECHNICAL REPORT AND ALL ADDENDA FOR BUILDING PAD LIMITS AND PREPARATION REQUIREMENTS. 7. CONTRACTOR SHALL ENSURE THERE IS POSITIVE DRAINAGE FROM THE PROPOSED BUILDINGS AND NO PONDING IN PAVED AREAS, AND SHALL NOTIFY ENGINEER IF ANY GRADING DISCREPANCIES ARE FOUND IN THE EXISTING AND PROPOSED GRADES PRIOR TO PLACEMENT OF PAVEMENT OR UTILITIES. LEGEND: EX/STING PAVEMENT CONCRETE ASPHALT AS NOTED Assn PROPOSED 7"CONC. PAVEMENT DOS77NG GRADE TC79.50 TOP OF CURB G79.50 GUTTER TP79.50 TOP OF PAVEMENT TG79.50 TOP OF GRATE 79.50 PROPOSED NATURAL GROUND ME79.50 MATCH EXISTING HIGH POINT �-- SWALE REV DESCRIPTION DATE OF -41 c4p�E�T�il�t K.L:SHE M. 6/6/17 mC�0 WARD, GETZ & ASSOCIATES, LLP CONSULTING ENGINEERS TEXAS REGISTERED ENGINEERING FIRM F-9756 2500 Tanglewilde, Suite 120 Houston, Texas 77063 713.789.1900 to �j :41,11 :4 Al J IFA k1i SCALE DESIGN- DRAWN 1"=100' SL JM SHEET C2.0 � p 8 4 GRAVEL 4 p 4 O --- p 4----- - _----- --tom=-�---.--�'----=------------- �Q / H.B. 17.0 KZPROP IP-RAP PRORRIP-RAP (TYP.) w O WATER LIFT STATION IN } STORMWATER LIFT STATION PROP. MANHOLE - -�----o------}---------------------�--� ____v- v v v �---->----->-- --�-- -f---E----E---f---F---E---f--f---e- I A I \\� o a. \` a o O `I rn I N 6.0' CONCRETE PILOT CHANNEL w m _ ?oo - �iO A A A A A A A A A A V'- -----------�---} A --F---F---F--f--f---E-------E---f DETENTION BASIN PROFILE 1 PROP.24" RCP GRAVITY OUTFALL W/ 8" RESCTRICTOR PROP.8" PVC FORCE MAIN CROSS SECTION A -A TOP OF POND / EL -17.0 80% PUMPED cl of B�- 6 NAW ML OROUNO 14 4 4 2 4 2 10 0 e e 4 2 FL 4.06 °+w 1tuu FL 3.0 H.B 17.0 1 lv --� W. FAIRMONT PARKWAY a DETENTION SUMMARY SITE AREA = 17.00 AC OFF -SITE AREA = 2.44 AC TOTAL AREA DRAINING TO POND = 19.44 AC NOTE: DETENTION VOLUME PROVIDED IS FOR 17.00 ACRES SITE DEVELOPMENT.. 100-YR STORM PUMPED DETENTION RATE REQUIRED = 1.0 AC -FT / AC DETENTION VOLUME REQUIRED = 17.00 AC -FT DETENTION VOLUME PROVIDED = 17.00 AC -FT Q 100-YR ALLOWABLE = 3.51 CFS Q 100-YR DESIGN = 2.63 CFS 100-YEAR STORM W.S.E.L. = 16.10 FT PIPE RESTRICTOR SIZE = 8 INCH RESTRICTOR AREA = 0.349 SQ FT EXISTING CONDITIONS: DRAINAGE AREA'C1' = 5.51 ACRES EXISTING C VALUE = 0.20 TC = 10*AO.1761 + 15 TC=10*(5.51)61761+15=28.51 MINS INTENSITY (2-YEAR, EXISTING) = 3.19 IN/HR EXISTING DISCHARGE RATE (Q) = 3.51 CFS RESTRICTOR SIZE 100-YEAR WSEL = 16.10 CENTER OF RESTRICTOR = 14.72 H=16.10-14.72=1.38FT. RESTRICTOR SIZE = JQ 2.25 114 = V3�5 - 2.25*(1.38')1"4 A = 0.768 FT PROPOSED ORIFICE DIAMETER = 8 INCHES OUTFLOW RATE PROVIDED = 2.63 CFS NAT. GIRD. 1 3 �Z EXIST. DITCH EXISTING DITCH NO TO SCALE DITCH CAPACITY CALCULATIONS: FLOOD PLAIN NOTE 8t BENCHMARKS: ALL ELEVATIONS SHOWN HEREON ARE BASED ON FLOODPLAIN REFERENCE MARK NUMBER 060020, BEING A ALUMINUM DISK STAMPED RM F 216 BM-03. LOCATED ON THE FAIRMONT PARKWAY APPROX. 0.1 MILES EAST OF HIGHWAY 146. HAVING A PUBLISHED ELEVATION OF 12.97 FEETINAVD88 (2001 ADJUSTED.) TEMPORARY BENCHMARK'N (T.B.A. A) 15.68' = BEING A BOX CUT ON 0 40 80 AN STORM INLET LOCATED ON THE WEST SIDE OF POWELL ROAD AT THE INTERSECTION OF POWELL ROAD AND EXPORT DRIVE. (AS SHOWN HEREON) SCALE: 1 " = 40' ACCORDING TO THE FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA), FLOOD INSURANCE RATE MAP (FIRM) FOR HARRIS COUNTY, TEXAS, MAP NO. 48201 C0945M REVISEDMATED JANUARY 6, 2017, THE SUBJECT TRACT APPEARS TO LIE WITHIN SHADED ZONE "X". THIS DETERMINATION WAS DONE BY GRAPHIC PLOTTING AND IS APPROXIMATE ONLY, AND HAS NOT BEEN FIELD VERIFIED. THIS FLOOD STATEMENT DOES NOT IMPLY THAT THE PROPERTY OR STRUCTURES THEREON WILL BE FREE FROM FLOODING OR FLOOD DAMAGE. ON RARE OCCASIONS FLOODS CAN AND WILL OCCUR AND FLOOD HEIGHTS MAY BE INCREASED BY MAN-MADE OR NATURAL CAUSES. A = FLOW AREA (TOP WIDTH + BOTTOM WIDTH)/ 2 X FLOW DEPTH 9.79 SQ FT P = WETTED PERIMETER 11,51 FT Rh = HYDRAULIC RADIUS (A/P) 0.85 FT N = DITCH ROUGHNESS VALUE 0.04 S = FLOWLINE SLOPE 0.0005 FTIFT Q = DITCH FLOW CAPACITY (MANNINGS EQUATION) Q = 1.486/N X (AWV) 7.3 CFS DITCH CAPACITY PRO-RATA SHARE: SITE AREA 5.51 ACRES TOTAL AREA CONTRIBUTING TO DITCH FLOWS 11.36 ACRES ALLOWABLE SITE RUNOFF (7 CFS X 5.51 AC/11.36 AC) 3.51 CFS SHEET NOTES: LEGEND: EX/STING PAVEMENT (CONCRETE/ASPHALT AS NOTED) 7s so PROPOSED 5" CONCRETE PILOT CHANNEL EXISTING GRADE TC79.50 TOP OF CURB G79.50 GUTTER TP79.50 TOP OF PAVEMENT TG79.50 TOP OF GRATE 79.50 PROPOSED NATURAL GROUND ME79.50 MATCH EXISTING o OF ..:..................:.. K.L SHEBLAK ........................ ^p' 79787 gr S 7 ltr�/0 a 6/6/17 OCR' '1 WARD, GETZ & ASSOCIATES, LLP CONSULTING ENGINEERS TEXAS REGISTERED ENGINEERING FIRM F-9756 2500 Tanglewilde, Suite 120 Houston, Texas 77063 713.789.1900 DETENTION VOLUME & CALCULATIONS SC L I D SI N ( DRAWNr SHEET C3.0 a a G 0 0 100 200 SCALE: 1 = 100' a �, r e i 1 g.7NO i r� l3AILl� r r R lA 5:.r r• r r 011 �11a3�.m�� MR,I l aIm" ®® ®® ®® mmmmmW"I I I,,I www I [i IJ mmmWWWmmwww .. P.1 ly m m©©wwwwwmmwww i I mmm� mommmmWW�Wmm momm,Ai17WW"_MmImmm 1,I III m _l�Av11_l!kFl mmm I • 1 MmO mI mW WWI I 11 III mm"-mmmm_Mmm�� �'lII;l� I 1 w�wm W I I I I" mmm-MMMMmm���llXtl��t1Y4J�(/11'!I ,.I m �� III I iL :I I I I I III I I M 1 I.. �I116Fl�11N47�tIM{7 .1 ww MMM : LI M 1.1 m '''��© 11 1 1� 1 I• I u ®' I a ©�� I I ���-��®I 1 I 11 ��� I'I rl 'mo©mmm i I• 1 I,I mmmmm 111 mmn-=== 1 L1 I L. LI 11� �i�' ®�_�_� I i4 � 1 I'I �_�_©_®_®1 "' 1 1 ®_�_�_-_� 1 .i I I: • 1 1.. �_�__®' lil 11 ®'III _® ©mmm, mm.— mm. wwww. e 1 I mmm-mmmm— 1:,1 mmww ,,.I I I , momm—. w 1wwwwww— 111 mmm_-mm�m I _.I �SI11mm " I:Im''I mmmm, mmmmmm_ mm I F1 1 I www-mmmmmMMm I.,1 ICI mI'I mom I U M1:I I:I''i MEMMWWmmmmm 11: I11 mww- 141 Ili 1 I. 1 1 ww 11 Ijlm wwww=MmmmmwWWI I I m i , ME.",mmM I.I mmm .i 1:Im,,. mmM I I I WWI, mmmEl"mmm, III " i I mmmmMMmm 1.1 Ij, wm',,.. M"Ill WWI " 1 :l m"Iffilmm =1"WWW FLOOD PLAIN NOTE & BENCHMARKS: ALL ELEVATIONS SHOWN HEREON ARE BASED ON FLOODPLAIN REFERENCE MARK NUMBER 060020, BEING AALUMINUM DISK STAMPED RM F 216 BM-03. LOCATED ON THE FAIRMONT PARKWAY APPROX. 0.1 MILES EAST OF HIGHWAY 146. HAVING A PUBLISHED ELEVATION OF 12.97 FEETINAVO88 (2001 ADJUSTED.) TEMPORARY BENCHMARK'N (T.B.A. A)15.68' = BEING A BOX CUT ON AN STORM INLET LOCATED ON THE WEST SIDE OF POWELL ROAD AT THE INTERSECTION OF POWELL ROAD AND EXPORT DRIVE. (AS SHOWN HEREON) ACCORDING TO THE FEDERAL EMERGENCY MANAGEMENT AGENCY (FEMA), FLOOD INSURANCE RATE MAP (FIRM) FOR HARRIS COUNTY, TEXAS, MAP NO. 48201 C0945M REVISEDIDATED JANUARY 6, 2017, THE SUBJECT TRACT APPEARS TO LIE WITHIN SHADED ZONE")(". THIS DETERMINATION WAS DONE BY GRAPHIC PLOTTING AND IS APPROXIMATE ONLY, AND HAS NOT BEEN FIELD VERIFIED. THIS FLOOD STATEMENT DOES NOT IMPLY THAT THE PROPERTY OR STRUCTURES THEREON WILL BE FREE FROM FLOODING OR FLOOD DAMAGE. ON RARE OCCASIONS FLOODS CAN AND WILL OCCUR AND FLOOD HEIGHTS MAY BE INCREASED BY MAN-MADE OR NATURAL CAUSES. SHEET NOTES: DRAINAGE AREA MAP LEGEND: A 1.52 AC DRAINAGE AREA AREA IN ACRES DRAINAGE BOUNDARY —� 2-YEAR SHEET FLOW 100 100-YEAR SHEET FLOW ���a�'�IL���IiilCi�[�P►���7:r/� K.L. SHEBLAK .............. 4/26/17 MEN WARD, GETZ & ASSOCIATES, LLP CONSULTING ENGINEERS TEXAS REGISTERED ENGINEERING FIRM F-9756 2500'ranglewilde, Suite 120 Houston, Texas 77063 713.789.1900 11 1 1 1 CI I 1 1"=100' I SL I JM SHEET C 4.0