HomeMy WebLinkAbout09-17-07 Drainage and Flooding Committee Meeting
2
MINUTES OF THE DRAINAGE AND FLOODING COMMITTEE
September 17, 2007
1. Call to Order
The meeting was called to order by Assistant City Attorney Clark Askins at 5:31 p.m.
Members of City Council Present:
Councilmembers, Chuck Engelken, Mike Clausen, Tommy Moser, Mike Mosteit and Howard
Ebow (arrived at 5:47 p.m.).
Members of City Emplovees Present: Interim City Manager John Joerns, Assistant City
Secretary Sharon Harris, Records Technician/Deputy Clerk Bonnie Garrison, and Planning
Director Wayne Sabo
Others present: Adam Yanelli, Earl Garrison, Shawn Bradstreet, David Janda, Carlos
Martinez, and Mr. and Mrs. Stout.
2. Petitions, Remonstrances, communications, and citizens and taxpayers wishing to address
the Flooding and Drainage Committee.
There was not anyone wishing to address the committee.
3. Discuss Structure of Drainage and Flooding Committee.
Councilmembers discussed the structure of the Drainage and Flooding Committee and
determined the committee would consist of four members and to appoint a Chairman, Vice-
Chairman, and one Alternate.
4. Appoint Chairman and Alternates of the Drainage and Flooding Committee for the City of La
Porte.
A motion was made bv Councilmember Moser to elect Councilmembers Mosteit as Chairman,
Clausen as Vice-Chairman, and Ebow as the Alternate of the Drainaoe and Floodinq
Committee. Second bv Councilmember Enqelken. Motion carried unanimouslv.
Ayes: Councilmembers Mosteit, Clausen, Moser, and Engelken
Nays: None
Abstain: None
5. Review Resolution 99-31 of the "Public Improvement Criteria Manual ("PICM") Called for in
Ordinance 1444 of the City of La Porte (The Development Ordinance of the City of La Porte),
relating to Drainage Criteria and Improvements.
Minutes of Drainage and Flooding Committee September 10,2007- Page 2
The committee reviewed and discussed Resolution 99-31 of the "Public Improvement Criteria
Manual ("PICM") Called for in Ordinance 1444 of the City of La Porte (The Development
Ordinance of the City of La Porte), relating to Drainage Criteria and Improvements.
The committee determined a subcommittee consisting of Chairman Mosteit and Committee
Member Moser would be assigned to meet with staff to review, discuss and ask questions
regarding the Fill Dirt policies and procedures for the City of La Porte.
Chairman Mosteit requested staff provide maps of drainage canals in the City of La Porte
from both the Harris County Flood Control District and the City of La Porte.
Committee Member Moser requested a Maintenance Program Schedule (including de-silting
of ditches) from the City of La Porte and Harris County Flood Control District. He also
inquired if there was a possible need for a Engineering Consultant to assist the City Engineer.
Committee Member Engelken requested an update on studies/survey conducted by HCFCD
in the City of La Porte.
The committee requested staff to verify Little Cedar Bayou Project being on HCFCD schedule
of projects.
6. Review Fill Dirt Policies and Procedures for the City of La Porte.
The committee determined a subcommittee consisting of Vice-Chairman Clausen and
Committee Member Engelken would be assigned to meet with staff to review, discuss and ask
questions regarding the Drainage Criteria for the City of La Porte.
7. Discuss Involvement and Coordination with Local Governmental Entities regarding Drainage
and Flooding issues.
The committee requested staff to contact surrounding cities and inquire if they are
experiencing drainage and flooding issues in addition to including Precinct 2, Harris County
Flood Control District, and Area Public Officials to distribution lists to receive notification of
future meetings held by the Drainage and Flooding Committee.
8. Committee Comments.
The committee had comments.
The next Drainage and Flooding Meeting will be held on September 24, 2007 at 5:00 p.m. in the
Council Chambers.
9. Adjournment.
There being no further business to come before the Committee, the meeting was adjourned at
6:45 p.m.
Respectfully submitted,
tJfLCut!l{00JJuA)
Sharon Harris, TRMC
Assistant City Secretary
Approv~d.this ~ day\~f ~ept~l}007.
/I1lLlted/ f1 11/4e{vvl
Chairperson Mike Mosteit
3
4
RESOLUTION NO. qq-":n
A RESOLUTION ADOPTING A PORTION OF THE "PUBLIC IMPROVEMENT
CRITERIA MANUAL ("PICM") CALLED FOR IN ORDINANCE 1444 OF THE CITY
OF LA PORTE (THE DEVELOPMENT ORDINANCE OF THE CITY OF LA PORTE),
RELATING TO DRAINAGE CRITERIA AND IMPROVEMENTS; MAKING CERTAIN
FINDINGS RELATING TO THE SUBJECT; FINDING COMPLIANCE WITH THE
OPEN MEETINGS LAW; PROVIDING A SEVERABILITY CLAUSE; AND PROVIDING
AN EFFECTIVE DATE.
WHEREAS, the City Council has directed the qualified professionals of the City's
staff to prepare a. Public Improvement Criteria Manual, setting forth City Policy and
guidelines relating to the design and construction of certain Public Improvements within
the City of La Porte, by virtue of the passage of Ordinance 1444, otherwise known as
the Development Ordinance of the City of La Porte; and
WHEREAS, City Staff has developed a portion of said policy, relating to drainage
criteria and improvements; and
WHEREAS, the Planning Commission of the City of La Porte has reviewed said
policy (in the form attached hereto as Exhibit "A"), and has received public comment on
said policy at its meeting held on August 19, 1999,pursuant to due notice, and
WHEREAS, the Planning Commission recommends approval of said Policy, in
the forin attached hereto as Exhibit II A";
NOW, THEREFORE, BE IT RESOLVED BY THE CITY COUNCIL OF THE CITY OF
LA PORTE, TEXAS:
Section 1. The facts and matters set forth in the preamble of this Resolution
are hereby found to be true and correct.
99-31
Section 2. The portion of the PICM relating to drainage criteria and
improvements, as set forth on Exhibit "A" attached hereto, is hereby adopted by the City
Council of the City of La Porte.
Section 3. The City Council officially finds, determines, recites and declares
that a sufficient written notice of the date, hour, place and subject of this meeting of the
City Council is posted at a place convenient to the public at the City Hall of the city for
the time required by law preceding this meeting, as required by the Chapter 551, Tx.
Gov't Code; and that this meeting has been open to the public as required by law at all
times during which this ordinance and the subject matter thereof has been discussed,
considered and formally acted upon. The City Council further ratifies, approves and
confirms such written notice and the contents and posting thereof.
Section 4. In the event any clause, phrase, provision, sentence, or part of this
Resolution or the application of the same to any person or circumstance shall for any
reason be adjudged invalid or held unconstitutional by a court of competent jurisdiction,
it shall not affect, impair, or invalidate this ordinance' as a whole or any part or provision
hereof other than the part declared to be invalid or unconstitutional; and the City
Council of the City of La Porte, Texas, declares that it would have passed each and
every part of the same notwithstanding the omission of any such part thus declared to
be invalid or unconstitutional, whether there be one or more parts.
Section 5. This Resolution shall become effective after its passage and
approval.
99-31
PASSED, APPROVED, AND RESOLVED thisJ]fLday of 5e.pr, 1999.
CITY OF LA PORTE
BY:~~----
", N RMAN L. MALO , MAYOR
A TIEST:
. i<d Ck&i1v. em€!
Martha Gillett, City ecretary
APPROVED:
/.
CHAPTER 5
STORM SEWER DESIGN CRITERIA
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.
1. 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 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. The result will be that
new development will limit or restrict the impact downstream.
5.1.1 All the drainage plans and construction shall meet or exceed the requirements of the City of La
Porte, 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.
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
Stormwater Criteria Page I of 10
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 channel or detention facility
E. Water surface profiles for the 25-year and/or IOO-year storms in the outfall channel. All
available information will be considered when making this determination.
F. Flow perinlet
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 impacted
5.2.4 The hydraulic gradient for the design storm may be shown on the construction drawings.
Calculations for the elevation for the hydraulic gradient shall be provided with the design storm
drainage calculations. The hydraulic gradient must be below the gutter line for the design storm.
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.
5.4 STORM FREQUENCY, RUNOFF AND DATUM
A. Storm Frequency
All drainage improvements shall be designed for the following storm frequencies.
Tvpe of Facilitv
Road Side Ditches and Culverts
Storm Sewers
Ditches & Culverts Drainage 100 acres and more
Bridges
Creeks
Detention Facilities
3 year
3 year
25 year
100 year
100 year
Refer to Section 5.5
B. 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:
Stonnwater Criteria Page 2 of 10
Q = CIA, where
Q is the storm flow at a given point in cubic feet per second (c.r.s).
C is a coefficient of runoff (see Table 1).
I 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. (See figure I, I-D-F Curves and Figure 2, Determination of Time
of Concentration)
A is the drainage area in acres
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 peak flow rate of storm 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.
1. Runoff Coefficients and Time of Concentration
Runoff coefficients, as shown in Table 1, shall be the minimum used, based on
total development under existing land zoning regulations. Where land uses
other than those listed in Table I 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 City 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 increases, 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 2m and in no case shall
the inlet time be more that the time shown in Table 1.
Stonnwater Criteria Page 3 of 10
Table 1
Zone Zoning District Name Runoff Maximum Inlet
Coefficient "C" Time in Minutes
R-1 Low Density Residential 0.50 15
R-2 Mid Density Residential 0.60 15
R-3 High Density Residential 0.80 10
MH Manufactured Housinl!. District 0.55 15
NC Neil!.hborhood Commercial District 0.80 10
GC General Commercial District 0.85 10
BI Business Industrial Park District 0.85 10
LI Light Industrial 0.85 10
HI Heavv Industrial 0.85 10
PUD Planned Unit Development District variable 10 to 15
Miscellaneous Land Uses
Land Use
Runoff Coefficient "C"
Church
School
Park
0.70 to 0.90
0.50 to 0.90
0.30 to 0.70
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 REQUIRED DETENTION
Detention Basins - Unless otherwise provided for in this Section, Detention Basins will be
required for developments within the following watersheds.
Little Deer Creek -.,- F212
. Upstream of Main Street
Little Cedar Bayou - F216
. Upstream of State Highway 146
Big Island Slough - B 1 06
. All segments
Spring Gully - B 1 09
. All segments
Willow Spring Bayou - B 112
. All segments
Taylor Bayou - Al 04
. All segments
The listed watersheds are shown on Figure 3.
Storm water Criteria Page 4 of 10
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 total development 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.
Table 2
Developed Area
o to 3 acres
3 to 10 acres
1 0 to 50 acres
Storage Coefficient
0.20 acre ft. / acre
0.45 acre ft. / acre
per HCFCD criteria
For developments larger than 50 acres, Harris county Flood Control District and the City Engineer shall
approve the detention facility criteria.
5.2.2 Outlet Sizing
1. The outlet structure shall be designed using the orifice equation as follows:
Q = CA x (2gh)~
Where,
C=0.8
A = cross sectional area
g = 32.2 feet / sec^2
h = head differential
For head differential use 2' or the IOO-year water surface in pond minus the 25-year
water surface in receiving channel, if available.
2. Minimum restrictor shall be 6" diameter.
5.5.3 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, green spaces, etc. to achieve the volume
required.
For larger developments every consideration shall be given to designing of the facility for multipurpose
use, such as playgrounds, miniparks, required green spaces, 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 4: 1 and a minimum bottom width
of ten feet;
2. the bottom of the detention basin shall have a minimum 0.50% cross slope to facilitate quick
drainage.
3. a v-shaped trickle channel a minimum of S' wide, six-inch thick. reinforced concrete shall be
constructed through the detention basin at a longitudinal slope of 0.20% to accommodate low flow
and facilitate rapid drainage. For developments less than 3 acres, the trickle channel may be 2 feet
wide and 4" thick.
4. a minimum 12-foot wide maintenance berm shall be provided around the perimeter of the
detention facility.
S. 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
subdivision plat.
Storm water Criteria Page 5 of 10
6. the detention basins, slopes, bottom, maintenance berm, and other associated right-of-way shall
be final graded with a minimum of 6" top soil the hydro-mulch or drill-seeded and watered to
facilitate full grass coverage.
7. parties responsible for maintenance of the detention facility must be shown on the plat or plans.
8. Pumped detention systems may be allowed with specific approval from the City Engineer.
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 prior to any
development approvals.
5.6 ADDITIONAL DESIGN REQUIREMENTS
5.6. I 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.
Finished elevations of new pavement, parking areas, or other improvements shall be designed so that each
succeeding high point is lower when moving in a downstream direction. This ensures the 1 DO-year
discharge has an unobstructed path to the discharge point whether discharging to a channel or detention
pond.
5.6.2 Public Streets as Drainage Facilities
1. Maximum depth of water to be allowed in local streets during design flow shall be at the top
crown, or top of curb, whichever is less.
2. Maximum spread of water in collector streets during design flow shall allow for one clear lane
of traffic (12 feet wide).
3. Maximum spread of water in arterial streets during design flow shall allow for two clear lanes
of traffic (24 feet wide).
5.6.3 Drainage Channels and Structures
I. The developer shaIJ install an underground storm drain on curb and gutter streets beginning at
the point where calculated storm water runoff is of such quantity that it exceeds the height
specified above. The developer shall construct the storm drain system from the point to an
approved outlet.
2. For non-curb and gutter streets, the developer may use open channel (channel or ditch) methods
o dispose of stonn water specified above. Such channels may be in dedicated draining 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.
Stonnwater Criteria Page 6 of 10
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., 3, lO-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(I') above the top of the curb using the highest point along the
portion of such curb fronting the building site, or
(2) At least eighteen inches (18") above the crown of the road elevation, using the highest
point along the portion of such road fronting the building site.
(3) At least on 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 Chapter 94, Code of Ordinances, Flood Hazard Reduction.
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 drainage channel. If pipe is selected, the maximum
allowable velocity shall be 8fps 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 or sewer
connections to public storm sewers shall occur at a manhole or at the back of an inlet as approved
by the City Engineer. 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 La Porte.
5.7 LOCATION OF STORM SEWER
5.7.1 Public storm sewers shall be located within a public street right-of-way or storm sewer easement,
dedicated to the public and adjoining a public street right-of-way. Storm sewers through side lot
drainage easements are highly discouraged. Limited use may be approved at the discretion of the
City Engineer. If approved, a minimum twenty-foot (20') wide easement is required (10' on each
lot).
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.
Storm water Criteria Page 7 of 10
B. Undivided pavement section five feet (5') inside the right-of-way. For storm sewer
located in a public street right-of-way, a minimum of two-foot (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 City Engineer.
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
(2'). 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 often 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 City Engineer.
5.8 STORM SEWER MA TERlALS
5.8.1 Storm sewer and culvert pipe shall be precast reinforced concrete pipe, unless specifically
approved by the City Engineer. 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-two
inched (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 diameter of less than forty-two inches (42") may
be installed using pipe with tongue and groove type joint and Ram-nele, or approved equal, as a
joint filler. When specifically approved by the City Engineer, reinforced concrete arch and
elliptical pipe conforming to ASTM C506 and ASTM 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-nek or approved equal.
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-27-79I, 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
O-ring gasket seal meeting the requirements of AASHTO C-361, current revision. (See City of La
Porte Construction Details).
5.8.3 Storm sewer outfalls shall have a 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 (W14 x W14) or three eighths inch (3/8")
steel rebar on twenty-four-inch (24") centers, each way. Rip rap shall be a minimum of six-inch
(6") broken concrete rubble with no exposed steel or well-rounded stone and shall be a minimum
of eighteen inched (18") thick. Slope protection texturing shall be required where public access
likely. Refer to the Construction Details for minimum dimensions.
Stonnwater Criteria Page 8 of 10
5.9 ADDITIONAL REQUIREMENTS
5.9.1 Minimum depth of storm sewer (measured to the top of pipe) shall be twenty-four (24") below the
top of curb or finished grade, whichever is lower. Minimum size storm sewer for main land and
inlet lead shall be eighteen inch (18").
5.9.2 Stonn sewers shall be bedded using cement stabilized sand as shown in the City of La Porte
Construction Details.
5.9.3 Pipe requirements.
A. Reinforced concrete pipe installed at a depth greater that thirty feet (30') shall be designed by the
engineer for the specific installation and approved by the City Engineer, 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- 723't Xl" or 5 I 1 Xl"
78- 102311 X I" or 5" X I"
MINIMUM THICKNESS
0.052
0.064
0.064
0.079
Bedding for corrugated steel pipe shall be cement-stabilized sand. 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.
C. Design storm flow in a street shall not exceed the capacity of the street, for the water surface equal
to the top or 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 lOO-year water surface
elevation or in accordance with the Federal Emergency Management Agency (FEMA)
regulations, latest revisions, or HCFCD requirements, whichever is greater.
5.9.4 Storm sewers less that 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 111;4'.
5.10 APPEARANCES
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.
Stormwater Criteria Page 9 of ] 0
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 four hundred
feet (400').
C. No Valley Gutter without prior approval.
D. Curb inlets should be on the intersecting side street at intersections with a major
thoroughfare. The City Engineer shall specifically approve locations at intersections.
E. Grated inlets will not be permitted in an open ditch.
F. Backslope swale interceptors shall be placed in accordance with the requirements of
Harris County.
G. Curb inlets shall have solid 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 and to top of first stage inlet with cement stabilized sand.
Storm water Criteria Page ] 0 of 10
-
L..
.c
-
c
~
'-:' 1 0
Z.
'u;
c
Q)
--
c
City of La Porte
~
:.\.
l-
ii
Intensity vs. Time of Concentration vs. Rainfall Frequency
(IDF Curves)
Source: Hydro 35ffP-40
- .
100
-
--. -
---.. -- 100.... - --
=---- -- -- -..... -....... ~
~ , r--... ...... .....
~ ~ ~ r-.:: r..... f'" ""'"
.....
......... - ...... r--... ..... ro-..
" ;::: ..... ""'" ""'"
r-... r-..
""" ..... ~ ~
r-... ~
5'
/100-year
?5-year
............1 a-year
-5-year
'3-year
'" 2-year
1
1
10
Time of Concentration, TC (minutes)
100
In ten sity,i- b
(d+ TC)8
FIGURE 1
Rainfall Frequency b d e
2-year 75.01 16.2 0.8315
3-year 77.27 17.1 0.8075
5-year 84.14 17.8 0.7881
1 a-year 93.53 18.9 0.7742
25-year 115.9 21,2 0.7808
1 aD-year 125.4 21.8 0.7500
L -;j
, >l;,S
92' '
. . ICOO .. ..1-"'"
~sco . ~I . .
c-BCO 0'
~7CO g uf-.- C ?VMT..) .
< v. 0.02 '
-IU'. .
-6CO =wt- -
. I ~ ~r-a.C3 .
500 = Ocr-
_ t:: ::;):-c.o.;
r - g~"5
400 -
.... t-l--o.o:C::-
-: '~d"" ~j . ~~
otf .... ~[- EC~~::: F~{::O SOIL)
w &&.: ., - .
~ 8,Q.q '. o.
~ r- -- 200 . en 'F 0.2.0 .
, ~ en ....
~~ - - _ ::.:}-o.o3. _ ~C trp;:R G~;'Ss) /
% :!E._ J-....
<.... ISO E"~~_.E=C.~O{:""\t.C~:.ss)
:), --....
~ c O~a-- - '" ""
Q .a:r L-- . -':"OOo~,~'"
Or-c.oS ~O.a~ (C.9a~=: ~.1SSj T
glOOO ~r r 1.0:'
~!
eo ~1~a.JO
<t .
70 . ~l
60 ,_I
o'
I
J
c:::
~
....
....
:;)
. OJ
a
50
o
" -..'", :
J
-
c:.:: -=
&~::. 2::>
>0 <-
o~ :z:0
k. c...l
'~?J G~:'
< c... ....
.2 -' uN
~ -"4
~
3 ":-
-'
l-
e
>
Co.
. .
I
3.':)
, '.. .
[sr2..S
-. .
~I . m 2'
~ECJO /'?~
-~ /' ~~
. &&J t:::- 0,..""6 ..,
Co j:::;:'.....' ...
3.~ '1.00 ~
Cr) =
//. 00':
till ~
ur-
<
~bS.O
I:!:~
::;)~
(/) r:-10.o
r= ~o.o
15
~
I
I
I
%
o
~
<
t!:
t-:
z 10.
u.
~~!J
O.
~tl S
l:.I
~
j: 7
0.7
LO
as
as .
6
0.5
5
0.5
rEx ,\:" ?:,Z':
I O'/Ea.A..'~D rlC'.'1
. 9
L : 200
- - - ..., ~ ,
I = : ~o -;~ \..... (::..'\55.
.. - ~... ~ '-'I
. - -- :-....
1-0"'''' ......- 0- C.."'.Cc:-.............C...
..... .......:.. & t....::. :- u... _~t t'\~1 t :.
r ? ~ - ~.. 0 ' ~J'"
_.\.: - 6.~. Iii ....
.;
0.4.
GUTTER FLOW
L = ~oo' .
n = 0.:';75
s ; LO ~..:ll
1 = 2.C !~:~.
= 20.0 +-
3
0..3
FIGURE 2
TIME OF CONCENTRATION FOR SURFACE FLOW
I
tn
C
w
J:
tn
ex:
w
~
~
w
~
o
a..
:5
~
o
<
~
I
vi
.:sZ .:? ~
z
~
i
::;,
~
o
w
~
~
3:
o
'{i
!
I
~
~
/)1
~~ i"'-I i.. ~..
~ '/"1 -=r.
I'il ~ iii
1 "..... -'7'f-- ~ . ~ r~"/llJr-D L ~ ~ \ J
I r""'" C_ L ~ = '---1 j:1,J~" "':~
'--X7 I~ f- /i ~ ~"",fj!-t'~ /' ~ ,,,;JJ, I
lJp; l..t.... II ,-,-~' - 1 ~-,,.. ,- -b=
tJ I I .ill";. g; r-- I II 10 1
i . - / I'~'" ~ T - J ~ II l.-t gl --'
..J : f/~ "I. - ~ '"11 ;, .... ~
./ _/1. H~t:_I/1 .. [J ~
1-=1 -)/
( \< ~~ (~/I ~I ' /
....... .. !I' ~ I ~
~,I I
J-' -11 s ~" ~
lI~ ',' 0 -r
r ... ~~;_L.lL..i -
r ~III ~ fJif .
~_ 1I~1W nilm ~ ,
'a.J' 3: I f Jl
,.J ~
-
_~ V
~l ::) __ ~
~I ~~
171
1
FIGURE 3
,-..
~
0::
U
<
..........
E-
~
~
t::..
I
~
0::
u
-<
E- rn
Z U
~
......
u
&:
t::..
t:.:l
0
U
~
0
-<
0::
0
E-
C/)
0,60
0.50
OAO
0,20
CURVE FOR DETERMINING
STORAGE COEFFICIENT
!
!
!
I
I
I I I
I I I
I
I I
l~
..,.., I
I I
I / !I ! !
I I I
Ii" 11
iT ~
I i I ! I I
! ,,! I I
I! III I
i I I "I i
I. I I I I I I I I I
i-J:lliL~+:t I +-~ 1-1 : ~
I 1 +t-rj-[+-, R-tFl I~ -+'
: I Iii I -r++- ."t i 1~IIIl"\"-i I ::J- -t
I I , ' I I I I
, ! !
-1
I
I
I
I
f I
I ~,.-.-
T
I
I I
!..
L
r
. I
0,30
I I
i i I I
J j I i I I I I I
I l!!..l.-LLL.: +
11111 T -~-
I III. I '
i i I I I I I
I I I I I
ill !' I I
I ! I 1
I 'f i j i I I' I I
i i i i I i I f i I
I I I' Ii. i I I t-1 ! I
1., 1_ _LU__!-. l-l-. -l-!-1-+-i-l-.w=+-
. U I \ I i Iii L i-L.L..t...!
i . --r-r-'J- -+++-, -I , I I "
. I '_..!--!_ -!-l-i--!-J--l....!--l-W-L-
! I IT i ' ! I I IT i Ii' I 1
-iT I;, !! I I ! I; I
--L- ii It+- i _1 ! ; I , ; I
-, I ' , i", ,-..-: 'I ,
I iiIW-i-I!i Ii
I! ! I I l iI I' Iii' i I i I I
, I' Iii ! ! I I ,
I . I I I I -!-J.-J-Li I t I i I I
I i'Ir<--+-'I'I~jl I'
I j~. 'm-tiT"t I!IT '
i I I I!i I, i
TTl I
llTT i I' I
I I I ji TT- TT-t-
I I I I i I I I i I I i I I I I
'++!I IiLJI 1I111!..
-r, ,-; ,-'I T' rr-n--n-r j-
-+-Li-LLL.l-P.- ....J....H...Li I I' I
Iii, I T II I I ' I i -l'--!-l-i. I
_~ I . I ! 1..' I i I. ii' I ,- T
iT,rT"i(l Il~1 . ! II
+H-~!_+-'i T! ~.,
~~--LL.L i i I I i
I I t f i '-H-+- t -r I' 4 i
: IT I: I; ! I ; I I i I I I
::l~.~' I;;' ."
:!' Ii! m-- i I'; i ~! I
! f!
!! 'I
I i I
, I I
il-
I
I
I I
! !
I
I I
!
I I
I I
, t
t
. . ! I t f
i '
I
: i 1 i I I
! i I I
-I-' I
, ! I I
. i
I ,
I .
I I
! ,
I I
I i
I ! I I
, I
I
I
. , .
I
0.10
I I I,
I I I
. II I
i I T'j
, I I i I I
I I I!, 1
I-lrrr I
Iii'
I I
I I ! !
,
I I
. l I ~ f
rrT; ;.1
o
3
10
20
30
...
DRAINAGE AREA (ACRES)
S = Cs A
i
J..
Ii'
-t--i-+-
I I
I
I I I
I I
I
i I I
I
I I
: {+,: Ii
+'' lIlt
ill i ! i lml.
'l'l,TiT
ill! i I I !
I I
i
! I
I
I
,
j
I
! i
I I ~
I I I i
I
I
I I
I I
,
,
"1
L I
j I I
, I
! T
I i I I
I , I
I I
I , ! . , IT
50
!
! .
; ~ ,
40
FIGURE 4
5
Submittal Date:
Owner's Name:
Mailing Address:
Project Address:
Legal Description:
Contractor:
Address:
Street
uescribe Work:
Phone:
Alt. Phone:
Fax:
Acreage:
City
State
Zip
,,: *PLEASE, NOTE:,-The Planning "Depa,rtrnent reserves the right. toin.spect the placement of soil-
and-recommend .changes as-necessary-toalleviate possible flooding of-neighboring properties.
**THIS AREA FOR CITY STAFF USEONLY**
BY I DATE:
BY I DATE:
BY I DATE:
BFE:
o SKETCH REVIEWED
o SKETCH APPROVED
o PERMIT APPROVED
FLOOD ZQNE:
MAXIMUM NO. OF TRUCKLOADS:
.:iPECIAL CONDITIONS:
PERMIT NUMBER ISSUED:
DATE:
FILL DIRT PERMITS
Information on Fill Dirt Policies
and Procedures
1. Fill dirt pennit application can be obtained at inspections desk. For questions on Fill Dirt
peHuitting contact the Planning Department (281-471-5020) and schedule appointment with
City Engineer or his designated assistant.
2. The Texas State Water Code Section 11.086 reads as follows:
(a) No person may divert or impound the natural flow of swface waters in this state,
or permit a diversion or impounding by him to continue, in a manner that
damages the property of another by the oveiflow of the water diverted or
impounded.
(b) A person whose property is injured by an oveiflow of water caused by an
unlmiful diversion or impounding has remedies at law and in equity and may
re.cover damages occasioned by the overflow.
The homeowner is solely responsible for complying and adhering to the above state statute.
The homeowner may be held liable for failing to comply with Section 11.086.
,:;. .:. ... ~ . : I .
3. Property owner should find their lots size and load estimate amount on the attached matrix
"" ,~~ ~?~~?:,~it~ ~i~~~)t\1?~t~~u:mn: "~"r ;,',:.:;" :"._,c'r., ':: . ,'C :"i';,' ::", ,'" ,'~_~ c',,::: :,', r",,: ; .,,:..:~c,~
4'." 'HaUl' routes ":for 'the 'deliveTy dUmp' truckS' shoUld -be "1idcfio -those 'routes 'liSted - iii' searoli 70"-'" .
231 of the Code of Ordinances. Repetitive trips needed off of these designated routes could
result in the assessment of a TruckinglHauling surcharge. Any damage to the various streets
and thoroughfares of the City of La Porte shall fall under Section 70-259, of the Code of
Ordinances which reads as fonows:
Any person moving or causing to be moved a load which. together with the weight of the
vehicle, exceeds the limit as set out in section 70-256, shall be liable to the city for any
damage done by any such excessively loaded vehicle to the streets, bridges or culverts in the
city and the acceptance of either of the permits provided for in this division shall be
conclusive evidence that the person to whom such permit is issued agrees to make good and
pay all such damages upon demand thereof made by the city.
5. In the cases offill projects between 6-49 loads, the standard swale to be used shall confonn
to at least the minimum dimensions shown on the example.
6. The City of La Porte is NOT responsible for providing fill dirt.
Cityhalll '(sy CPShare/Fill Dirt PermittinWF1LL DIRT POLICIES2.DOC Revision January 2006
7. No fill may be placed in the floodplain without compensating excavation. The City of La
Porte reserves the right to require that any fill placed in the floodplain be accompanied by a
sealed compaction test stating that the fill has been compacted to 95% Standard Proctor or
better.
8. After the property owner has demonstrated sufficient compliance with the intent of these
policies and procedures, a permit may be issued through the Inspection Division.
9. Any deposited fill dirt that is liable to hold stagnant water is a violation of section 34-128 of
the city's code of ordinances. Section 34-128 reads as follows:
The following specific acts and conditions are declared to constitute a public nuisance and
are hereby prohibited and made unlawful:
Any lot or parcel of real estate situated within the city which has the surface thereof filled or
partly filled with holes, or is in such condition that the lot or parcel holds or is liable to hold
stagnant water therein, or. from any other cause. is in such condition as to be liable to cause
disease, or produce, harbor, or spread disease germs of any nature or tend to render the
surrf?unding atmosphere unhealthy, unwholesome or obnoxious.
10. Upon receipt of a fill dirt permit, the permit holder must place the green placard (provided
with permit) at a prominent location at or near the entrance of the site where fill dirt
operations will occur.
11. Fill dirt permit fees shall be $25.00 for 6 to 49 loads of permitted fill dirt, and $2.00/1000 for
each additional load. The first 5 loads of permitted fill dirt are free.
~.." : ,. :." ;,.01' _. .'
, ; . ; ~.
-'t.'; -
:O;,~ :...~.""". ~-':;'~ ;~ ," OJ:..
1 load = 12 cubic Yards.
Cityhalll '(S)/ CPSbareIFill Dirt PermittinglFIIl.. DIRT PODCIES2.DOC Revision January 2006
EXHIBIT A
;, TO
OR;D1NANCE 1444-A
All; Lots Small Lots Large Lots
PERMIT REQUIRI:OMENTS AND CONDITIONS (less than 1 acre) /1 acre or more)
1.5 ~oads 6-49 loads 50 and more loads 6-49 Loads 50 and more Loads
1 Permit ReQuired .. .. .. ..
2 Permit Fee Assessed .. .. .. ..
3 180 Day Permit for Project Comoletion .. .. .. ..
.
4 Spreadiml of Delivered Fill Must Becin within 30 Davs . .. .. .. ..
5 For Open Ditch Roadways Maximum Fill to be 6 roches below .. .. ... ..
top of adiacent crown of road
6 ReCommended overland slope for lot grading to be 0.2%-0.75% .. ..
SA For Curb & Gutter Streets, Grade Fill at 0.2%-0.75% toward , .
street
7 For Lots Abutting an Alley Way, Match the Grade of the Alley ... .
and Grade to Drain Toward Street'
B Grading & Drainage Plan submitted signed and sealed by .. ..
Professional Encineer licensed in the State of Texas
8A Storm Water pollution Prevention Plan and Revegetation Plan . ..
submitted
88 Demonstration that Watershed. is Not Being Adversely .. .. .
Impacted
BC Grade of swales to be customed/enClineered for each site .. .
9 Sketch, Surveyor Site Plan Showing Proposed Fill Placement .. .See Item 8 .. .See Item 8
and Location of Proposed Drainaae drawn to scale
10 Sill Prevention and Reveoetation olan reauired .See Notes 3&4 'See Item 8A .See Notes 3&4 . See Item SA
11 1 ft Top of Bank Swale Offset from Property Line '.. .. .. .
12 5 fI Top of Bank Swale Offset from Property Line . It ..
13 No Fill Unloaded within 15 ft of Prope.rtv Line . .. It
14 No Fill Unloaded within 5 ft of ProDertv Line : ,. It .'
15 Address for Site Required And Fill Must be Delivered to this '. It .. .. ..
addr~ss ,
16 Any deviation from these permit requirements Shall be Reviewed It .. .. ..
and Approved By the City',
, .
. = ReqUlred.lnformalion, ActiVity or Regulation
Note: . .'
1 No dump trucks larger than 12 cY dump trucks snail be allowed for use il1deliver to addresses off truck routes.
2 Only one Fill Dirt Permit will be issued for anyone property orad[jres$ over a 180 day span.
3 Sill prevention plan shall at's minimum.consist of silt fencing or block sodding rows of Bod 2' wide along the leading edge of the filled area.
4 Revegetation shall consist of seeding, sprigging, sodding, turf establishment (or combination thereof) that produces an effective vegetative cover of 75% within 90
days. .. .
I
EXHIBITl/B"
Ii
ROADWAY
NOTE: CROWNED AT SECTION A-A
MAX HEIGHT OF FILL
6" BELOW CROWN OF ROAD
SECTION A-A
LOT GRADING
PROPERlY
liNE
lOCA
OF
MAY
nON
A-A I
VARY I
t 1 mL 1 f
I AR~I
ROADWAY
3'lYP.
MATCH
ADJACENT
GRADE
NOTE:
MIN. SLOPE 0.2%
:, .~' : . ., '~, '.:1.,:' ~,':, "':'MINIM.UM :SWALE:",':.'~,:,
l.!ARGE LOT GRADINGl ' ,
PROPERlY
UNE
~ ROAD
"u$'I ()ll.
~"'f~'("f~';l'I'
:~e~
~
PROPERlY
UNE
I.:J
~
Q
.j..:
~
A
~
MATOl AUEl u:
PRopeRTY
GRADE TO srREEl"
-=
..J
d
L..
I '
-
/.
I-
~
......
Q
I
..J
..J
......
L..
I
(J'\
/
(I)
I.:J
~,
Q
OR ALLEY .
OR ALLEY
SMALL LOT / SMALL PROJECT
INCURS & GUTTER AREAS
SMALL LOT/SMALL PROJECT
IN OPEN CHANNEL AREAS
FILL PERMIT DETAILS
CllY OF LA PORTE
604 W. F<lirmont Pilrkw<lY
Plilning Dept./Engineering Div,
Lil Porte. Texas n571
281-471-5020
I-
W
Q
/
~: ..... ~
. . ., (I)
'i..~' . " ~
Ii:
DATE: JULY 2003 DRAWN BY: JR CHECKED BY: BS APPROVED BY: RAC
NOT TO SCALE DWG NO: 0703FDOl
~
.
.
ORIGINAL
ORDINANCE NO. 1444-A
AN ORDINANCE AMENDING SECTION 2.19 DEVELOPMENT, SECTION 4.08
DEVELOPMENT SITE PLANS: GENERAL AND SECTION 11.02, DRAINAGE AND
STORM SEWER. OF CITY OF LA PORTE ORDINANCE NO. 1444 REGULATING THE
PLATTING OR REPLATTING OF LAND INTO SUBDIVISIONS IN THE CITY OF LA
PORTE AND WITHIN THE EXTRATERRITORIAL JURISDICTION OF THE CITY OF LA
PORTE; PROVIDING THAT ANY PERSON VIOLATING THE TERMS OF THIS
ORDINANCE SHALL BE DEEMED GUILTY OF A MISDEMEANOR AND SHALL UPON
CONVICTION BE FINED A SUM OF NOT MORE THAN TWO THOUSAND DOLLARS
($2,000.00) FOR EACH VIOLATION; FINDING COMPLIANCE WITH THE OPEN
MEETINGS LAW; PROVIDING A SAVINGS CLAUSE AND A SEVERABILITY CLAUSE;
AND PROVIDING AN EFFECTIVE DATE HEREOF.
BE IT ORDAINED BY THE CITY COUNCIL OF
THE CITY OF LA PORTE:
Section 1. The City Council of the City of La Porte hereby finds, determines and
declares that all prerequisites of law have been satisfied, and hereby determines and
declares that the amendments to Section 2.19, Develooment, Section 4.08 Develooment
Site Plans: General, and Section 11.02, Drainaae And Storm Sewer, of City of La Porte
Ordinance No. 1444, are desirable and in furtherance of the goals and objectives stated
in the City of La Porte's Comprehensive Plan.
Section 2. Section 2.19, DEVELOPMENT, of City of La Porte Ordinance 1444,
is hereby amended to read as follows, to-wit:
"2.19 DEVELOPMENT: The process of converting land within the City's
jurisdiction from its natural state, or altering the elevation of prooerty.
or converting its existing usage to residential, commercial, or
industrial uses. This definition encompasses any and all physical
changes to the land not regulated through the City Building Code
ORDINANCE NO. 1444- .
Page 2
.
ORIGiNAL
inherent in such conversions. The t~rm development includes
subdivisions as defined herein."
Section 3. Section 4.08 DEVELOPMENT SITE PLANS: GENERAL. of City of
La Porte Ordinance 1444. is hereby amended to read as follows. to-wit:
"4.08 DEVELOPMENT SITE PLANS: GENERAL
The following sections of this Ordinance outline procedures for
preparing and obtaining approval for developments not defined
herein as subdivisions. Except as noted in Section 4.08 (A) below. it
shall be a violation of this Ordinance for any person to develop
property within the City of La Porte without first:
a. Filing a Development Site Plan and required documentation for
approval.
b. Having said Development Site Plan approved according to the
procedures set forth herein; and
c. Obtaining a Development Authorization.
A. DEVELOPMENT SITE PLANS: EXCEPTIONS TO FILING
REQUIREMENTS
4:-_"lo Developmont Sito Plan filing chall be required as provided for
her{)in in tho oaso of a development whioh is strictly agrioultural in
character and use.
~ No Development Site Plan filing shall be required as provided for
herein in the case of a development that is solely and strictly a
ORDINANCE NO. 1444- A.
Page 3
.
OR1GiNAL
Subdivision, as that term is defined herein, and the requirements
of Section 4.04 of this Ordinance have been satisfied for such
Subdivision.
3:_"'Jo Do':elopmont Site PlaA filing shall bo roquired as provided for
hor-oin in the oaso of a dcy:olopmont that is otriotly r{)cidontial in
ohamoter and usa, and oooum in tho fOFm of a singlo family
houso, rogaFdloss of whethor caid hOblse is oonstructed insido or
outside of a Slolbdi'Jision.
B. MAJOR AND MINOR DEVELOPMENT SITE PLANS:
REQUIREMENTS AND CONTENTS
(SEE APPENDIX E)
For both Major and Minor Developments, the Development Site
Plan is drawn accurately to scale with exact dimensions. When
accompanied by all other required documentation, Development
Site Plans contain sufficient detail for evaluation of the proposed
development. Complete instructions for preparing Development
Site Plans are contained on Appendix E. II
Section 4. Section 11.02, Drainage and Storm Sewers, of City of La Porte
Ordinance No. 1444 is hereby amended by adding language pertaining to the alteration
of the elevation of property. Section 11.02, Drainage and Storm Sewers, shall hereafter
read as indicated below:
e
ORDINANCE NO. 1444--A.
Page 4
.
ORIGINAL
811.02 DRAINAGE AND STORM SEWER
Adequate drainage" shall be provided as to reduce the community's
exposure to flood hazards with respect to adjacent, upstream and
downstream developments. (See also Chaoter 94. Floods. of the
Code of Ordinances of the City of La Porte for additional
recuirements.) Adequate drainage shall be provided within the limits
of the subdivision and/or development The protection of adjoining
property shall be accounted for in the design of the drainage system.
and shall be subject to the approval of the Director of Planning or his
designated representatives.
Any oerson or oersons that alter or change the elevation of prooerty
shall be resoonsible for aoolvinc for and obtaining. orior to said
change or alteration of the elevation of orooerty. a develooment
authorization from the City Planning Deoartment. Any chance or
alteration in the elevation of orooerty recuires submission of a Site
Plan prior to the chance or alteration of oroperty. which said Site
Plan shall delineate the orooosed change or elevation of orooerty.
Said certified site plan shall be subiect to aooroval bv the City
Engineer.8
Section 5. Any person, as defined in Section 1.02(27) Texas Penal Code, who
shall violate any provision of this Ordinance, shall be deemed guilty of a misdemeanor
and upon conviction shall be punished by a fine not to exceed Two Thousand Dollars
ORDINANCE NO. 1444- .
Page 5
.
ORi0~t\!.I\ I
~ I l:j I ., I"'. .
.. .. '.... , .
($2,000.00). Each day a violation of this ordinance shall continue shall constitute a
separate violation.
Section 6. All rights or remedies of the City of La Porte, T ~xas, are expressly
saved as to any and all violations of any Zoning Ordinance or amendments thereto, of
said City of La Porte, that have accrued at the time of the effective date of this Ordinance;
and as to such accrued violation, the court shall have all the powers that existed prior to
the effective date of this Ordinance; and as to such accrued violation, the court shall have
all the powers that existed prior to the effective date of this Ordinance; and that all
existing violations of previous zoning ordinances which would otherwise become
non-conforming uses under this Ordinance but shall be considered as violations of this
Ordinance in the same manner that they were violations of prior zoning ordinances of
said City of La Porte.
Section 7. If any section, sentence, phrase, clause, or any part of any section,
sentence, phrase, or clause, of this Ordinance shall, for any reason, be held invalid, such
invalidity shall not affect the remaining portions of this Ordinance, it is hereby declared to
be the intention of the City of Council to have passed each section, sentence, phrase, or
clause, or part thereof, irrespective of the fact that any other section, sentence, phrase, or
clause, or part thereof, may be declared invalid.
Section 8. The City Council officially finds, determines, recites and declares that
a sufficient written notice of the date, hour, place and subject of this meeting of the City
Council was posted at a place convenient to the public at the City Hall of the city for the
time required by law preceding this meeting, as required by the Open Meetings Law,
Chapter 551, Texas Government Code; and that this meeting has been open to the public
ORDINANCE NO. 1444- .
Page 6
.
O~!P:~'/t~
as required by law at all times during which this ordinance and the subject matter thereof
has been discussed. considered and formally acted upon. The City Council further
ratifies, approves and confirms such written notice and the contents and posting thereof.
Section 9. This Ordinance shall become effective fourteen (14) days after its
passage and approval, however, implementation of this ordinance will not take place until
180 days after its passage. The City Secretary shall give notice to the passage of the
notice by causing the caption to be published in the official newspaper of the City of La
Porte at least twice within ten (10) days after the passage of the Ordinance.
PASSED AND APPROVED THIS THE-ll... DAY OF March
, 1998.
CITY OF LA PORTE
BY:~~ ~~
. N RMAN MArONE, r -
AlTESTA TION:
B~/di
ARTHA ILLETT,
City Secretary
MEETING HANDOUTS
, . k :,.,~..." ,~;,,,,,,,,,,,,,{~<;;::,~':";,~:~":"-.':';;'':':''C:-:'."'
',':.: .~::";;;;:",",,--",,:'r;'.. .:1:.:':' i=.~::~~~.i'":'-:::::t"W-", ,,;,.,;~~~.:,~'.G;;.':::i~: ,-,_;...;.:..~..:.r":,'<};,~::{5.;~.;';.;"(-:~:'-'::::;':::;-li!;::~~.:...\'!~~:;;':';: I:::.:.'_"~'-;.::_'::~r,':"-'._~,:~:~'~''::':,*,;:,,~~:,~::~'::r,~,,\f~.~,,-"<"'~~,:':..:' .:;::,:..
CITY OF LA PORTE
604 W. Fairmont Parkway, La Porte, TX 77571
www.laportetx.gov
Phone: (281) 471-5020 I Fax (281) 470-5005
September 19, 2007
Sylvia R. Garcia
Harris County Commissioner, Precinct 2
1001 Preston, Rm. 950
Houston, Texas 77002
Dear Ms. Garcia:
As you are aware, the impact of Tropical Storm Erin has drawn much attention to drainage
issues throughout the City of La Porte. During a recent meeting, the City Council appointed a
sub-committee, consisting of four members of Council, to focus on possible short and long
term actions to assist in alleviating some conditions that prevent our drainage systems from
operating at peak design efficien9" We sincerely appreciate Mr. John Saavedra's attendance
at that meeting.
The fIrst meeting of the drainage and flooding sub-committee was held on September 17,
2007. One of the important conclusions of that meeting was the need for inter-jurisdictional
cooperation and coordination with HCFCD; Precinct 2, Harris County and State /Federal
Agencies in order to put into effect any meaningful long term solutions. As such, the
committee has extended an invitation to you or your representative to attend future meetings
so that all efforts to improve drainage in La Porte can be weighed and balanced with the
interests and actions taken by other jurisdictions.
The next meeting of the committee is scheduled for September 24, 2007, 5 PM at City Hall,
604 W. Fairmont Parkway, La Porte, Texas 77571, in Council Chambers. We apologize for
the short notice for this meeting but hope to establish a schedule for future meetings in a more
timely manner. We look forward to coordinating our efforts with you in hopes of having a
favorable impact for drainage within the region. The point of contact for this project is
Wayne J. Sabo, Director of Planning. He may be reached at 281~470-5056.
cc: Mr. Roel Garcia, Deputy Commissioner
Mr. John Saavedra, Road and Bridge General Superintendent
",4t",,~'.;::::"~-~""":~:::'.::'._-:o:..l.;~0-.\i,,_."'l:~,,-,,~'-,._~ ",' ,..,.-.,1' ".~,,,,,,~~,__.~..'..'~:~:~~.~,,, '.
CITY OF LA PORTE
604 W. Fairmont Parkway, La Porte, TX 77571
wW\'i.laportetx.gov
Phone: (281) 471-5020 I Fax (281) 470-5005
September 19, 2007
Mr. Michael D. Talbott, PE.
Harris County Flood Control District
9900 Northwest Freeway
Houston, Texas 77092
Dear Mr. Talbott:
As you are aware, the impact of Tropical Storm Erin has drawn much attention to drainage
issues throughout the City of La Porte. During a recent meeting, the City Council appointed a
sub-committee, consisting of four members of Council, to focus on possible short and long
term actions to assist in alleviating some conditions that prevent our drainage systems froW
operating at peak design efficiency. We sincerely appreciate Mr. John Randolpb's attendance
at that meeting.
The fIrst meeting of the drainage and flooding sub-committee was held on September 17,
2007. One of the important conclusions of that meeting was the need for inter-jurisdictional
cooperation and coordination with HCFCD; Precinct 2, Harris County and State /Federal
Agencies in order to put into effect any meaningful long term solutions. As such, the
committee has extended an invitation to you or your representative to attend future meetings
so that all efforts to improve drainage in La Porte can be weighed and balanced with the
interests and actions taken by other jurisdictions.
The next meeting of the committee is scheduled for September 24,2007, 5 PM at City Hall,
604 W. Fairmont Parkway, La Porte, Texas 77571, in Council Chambers. We apologize for
the short notice for this meeting but hope to establish a schedule for future meetings in a more
timely manner. We look forward to coordinating our efforts with you in hopes of having a
favorable impact for drainage within the region. The point of contact for this project is
Wayne J. Sabo, Director of Planning. He may be reached at 281-470-5056.
cc: Mr. John Randolph, Senior Project Coordinator, HCFCD
. ...:..:;n;..;..:...:....;.;:...~~__...::"=..~..__,!_ ."~,..".._. '-..~~i,.""'~.....",.,..,..~_..;;,__ "
..., -.' ~'--o-.,_.~~........~~, -,',_ .,.. .-"t..==_--,-~.._......,~=.J. L L.,,"..~
.~ ~ -,1;!"'~ ~- :"~!~~',';,-~:;~;;'
:'=:;.~'~"':'~~:;:"'_~_;::~_~;&;'::'-'::,:"-4c;;:~~'::':ti~~~';CT~;~:;~~_J(~ !f7-r:~-.c:~~~J.I:'r'~_m~';~'.;'-:,;::::~;'f'.';:T~'.t,<f"'f-;:_;,.;;:,~:.:;:::.~-:o-.t~:";,"';~~;3:~~t~_;{;:.~,~;:'i;&,:\';;~';;.~~;.I.P~~S~~~':~',_='2;::'."~-":'~"'::'~~~~~:~~;:~"~':;'iit-'~":C--::,.,.",.;-:-t:;~::~~~\:"
CITY OF LA PORTE
604 W. Fairmant Parkway, La Porte, TX 77571
v\.'vJW.laportetx.gov
Phone: (281) 471-5020 I Fax (281) 470-5005
September 19, 2007
Mr. Robe Belgau
City of Morgan's Point
Director of Public Works
1415 E. Main St.
Morgan's Point, TX 77571
Dear Mr. Belgau:
As you are aware, the impact of Tropical Storm Erin has drawn much attention to. drainage_.
issues throughout our area. During a recent meeting, the La Porte City Council appointed a
sub-committee, consisting of four members of Council, to focus on p()ssible short and long
term actions to assist in alleviating some conditions that prevent our draipage systems from
operating at peak design efficiency.
The fIrst meeting of the drainage and flooding sub-committee was held on September 17,
2007. One of the important conclusions of that meeting was the need for inter-jurisdictional
cooperation and coordination with adjacent cities, HCFCD; Precinct 2, Harris County and
State !Federal Agencies in order to put into effect any meaningful long term solutions. As
such, the committee has extended an invitation to you or your representative to attend future
meetings so that all efforts to improve drainage in the region can be weighed and balanced
with the interests and actions taken by other jurisdictions.
The next meeting of the committee is scheduled for September 24, 2007, 5 PM at City Hall,
604 W. Fairmont Parkway, La Porte, Texas 77571, in Council Chambers. We apologize for
the short notice for this meeting but hope to establish a schedule for future meetings in a more
timely manner. We look forward to coordinating our efforts with you in hopes of having a
favorable impact for drainage within the region. The point of contact for this project is
Wayne J. Sabo, Director of Planning. He may be reached at 281-470-5056.
.",;:c.O....-,,___':I.':L"-"<.."" -.;.i,:"'., <,,::-y-~.c~ '<:t.::~:,~"R-;;_:.:..';>>O.' i..::...';;" .~.;:-;,.__,_L;:;,F"",T'~ ,~~~ .;.f"':-:<:.i:'-, ~.~;r::7"i:~i:'ti{~'_:';,;'"{:;.~,~::':' ,
) ,\ ;;~{ '':,-~~' :,~ ;,,~,.--,,;
- .~.-";;..-:-j-:<-,._",.~....,;~:-
'<c"'.~~~: ,~~~, "-;-rn:-::~'_;,;,':"::;;,-:;:-,\-,~~--;;:::? ;l~~-:"';;:~~;r~~ '.':'f;~{':\~:":'~'=-~~'3 Z~::-<,gr:':;;:~,<,~"'.::t~,:~~,.~.:.t'r~~.:",,~'(';:
CITY OF LA PORTE
604 W. Fairmont Parkway, La Porte, TX 77571
www.laportetx.gov
Phone: (281) 471-5020 I Fax (281) 470-5005
September 19,2007
Mr. David Stall
City Administrator
City of Shoreacres
601 Shoreacres Blvd.
Shoreacres, TX 77571
Dear Mr. Stall:
As you are aware, the impact of Tropical Storm Erin has drawn mllch attention~!o drainage
issues throughout the area. During a recent meeting, the La Porte City Council appointed a
sub-committee, consisting of four members of Council, to focus on possible short and long
term actions to assist in alleviating some conditions that prevent our drainage systems from
operating at peak design efficiency.
The fIrst meeting of the drainage and flooding sub-committee was held on September 17,
2007. One of the important conclusions of that meeting was the need for inter-jurisdictional
cooperation and coordination with adjacent cities, HCFCD; Precinct 2, Harris County and
State IF ederal Agencies in order to put into effect any meaningful long term solutions. As
such, the committee has extended an invitation to you or your representative to attend future
meetings so that all efforts to improve drainage in the region can be weighed and balanced
with the interests and actions taken by other jurisdictions.
The next meeting of the committee is scheduled for September 24, 2007, 5 PM at City Hall,
604 W. Fairmont Parkway, La Porte, Texas 77571, in Council Chambers. We apologize for
the short notice for this meeting but hope to establish a schedule for future meetings in a more
timely manner. We look forward to coordinating our efforts with you in hopes of having a
favorable impact for drainage within the region. The point of contact for this project is
Wayne J. Sabo, Director of Planning. He may be reached at 281-470-5056.
Jo s
Interim City Manager
__ ~--.. _M ___~ .- '__'<;"-'m__-"__" _~:.,..~_,,'