Chapter 109. Engineering and Construction Standards

The following words, terms and phrases, when used in this chapter, shall have the meanings ascribed to them in this section, except where the context clearly indicates a different meaning:

Americans with Disabilities Act (ADA) means the civil rights legislation signed into law on July 26, 1990, and all amendments thereto.

Collector means a street so indicated on the major thoroughfare plan, such plan being on file with the director of planning and community development.

Commission means the city planning and zoning commission.

Detention pond means a basin that is designed to hold runoff from an area and then release the runoff to a receiving body of water over time.

Director means the director of the public works and engineering department.

Impervious surface means any surface that impedes or prevents natural infiltration of water into the soil. Impervious surfaces may include, but are not limited to, asphalt, concrete, gravel, crushed stone, clay, bedrock, limestone, compacted soil, wood, glass and plastic products.

Local street means all other streets not otherwise indicated on the major thoroughfare plan, such plan being on file with the director of planning and community development.

Lot means a parcel or portion of land in a subdivision or plat of land, separated from other parcels or portions by description as on a subdivision or record of survey map or by metes and bounds, for purpose of sale or lease to or separate use of another.

Plat has the meaning ascribed in section 126-1 of this Code.

Private easement is a granting of usage rights to a defined tract of land between private persons or entities and does not grant the right of use to the general public.

Public easement is a granting of specific or general usage rights to a defined tract of land from the owner of the land to the public at large by plat, a separate recorded instrument of conveyance, or condemnation.

Texas Accessibility Standards (TAS) means the rules and requirements promulgated under the authority of V.T.C.A., Government Code ch. 469, Elimination of Architectural Barriers, and V.T.C.A., Occupations Code ch. 51.

(Ord. No. 14,605, § 8, 12-10-20)

This chapter shall apply to all development and infrastructure projects, private or public, that endeavor to improve a tract of land or make public or private infrastructure available to a tract of land within the corporate limits of the city or any tract of land within the city's extraterritorial jurisdiction subject to chapter 126 of this Code.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Unless specifically stated to the contrary, variances to the criteria set forth in this chapter will be subject to the standards and requirements of this section.

(b) Variances from the criteria and standards established in this chapter shall be requested in writing from the applicant on forms provided by the director.

(c) Individuals seeking a variance are required to submit a separate variance application for each criteria variance sought.

(d) Complete variance applications must be submitted on or before the time of the original construction plan submittal. Complete variance applications will include, at minimum, the following:

(1) The specific criteria from which the applicant is seeking relief;

(2) The specific, undue hardship resulting from compliance with the criteria;

(3) The proposed alternative to the criteria;

(4) A comparison of the criteria to the proposed alternative as it relates to the undue hardship resulting from compliance with the established criteria; and

(5) Any potential effects on the health, safety, welfare, and convenience of the general public.

The director may request additional information as necessary to make a decision on the proposed variance.

(e) Variance applications shall be sealed by a professional engineer licensed in the state.

(f) Incomplete variance requests will be rejected.

(g) The director will review the variance request considering the information provided on the application and will determine if granting the request will:

(1) Have a detrimental effect on city infrastructure;

(2) Create a hardship in the maintenance of city or private infrastructure;

(3) Violate the rights of property owners;

(4) Violate a regulatory requirement to which the city must adhere;

(5) Be aligned with the overall intent of the criteria in this chapter; or

(6) Create a beneficial outcome for all parties involved.

(h) The director's approval or denial of the variance request shall be final and binding on the applicant.

(i) The applicant will receive notification of the approval or denial of the variance request.

(j) Approved variances shall be listed on the cover sheet of the permitted set of plans.

(Ord. No. 14,605, § 8, 12-10-20)

(a) All public infrastructure not located within a proposed or established public right-of-way shall be located within an easement that has been dedicated for the public use and recorded with the county clerk.

(b) All easements dedicated for city-maintained infrastructure that are recorded by separate instrument shall be reviewed by the city attorney's office and shall include a graphic representation of the proposed easement.

(c) The encroachment upon any utility or drainage easement with infrastructure or improvements that are not maintained by the city shall require approval from the director.

(Ord. No. 14,605, § 8, 12-10-20)

(a) The minimum width of utility easements dedicated for city utilities shall be 16 feet wide or as otherwise required by the director.

(b) All utility easements shall have a five-foot building setback measured from the edge of the easement away from the interior of the easement.

(c) All utility easements shall be kept clear of fences, buildings, plantings and other obstructions to the operation and maintenance of the easement.

(d) Utility easements shall not be established for surface utilities.

(Ord. No. 14,605, § 8, 12-10-20)

(a) The minimum width of drainage easements shall be 16 feet wide or as otherwise required by the director.

(b) All drainage easements shall have a five-foot building setback at a minimum measured from the edge of the easement away from the interior of the easement.

(c) Drainage easements shall not be used to establish surface drainage facilities. Surface drainage facilities are required to be located within drainage reserves.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Private utility easements are required where private utilities cross a property line.

(b) Private easements are required to be recorded with the county clerk's office.

(c) If a private easement is required for a project undergoing permit review, the private easement shall be submitted to the director after recordation with the county clerk.

(Ord. No. 14,605, § 8, 12-10-20)

(a) The division, subdivision, development or redevelopment of a tract of land shall require the creation of cross-access easements or agreement across the tract to be divided, subdivided, developed or redeveloped. This requirement is intended to remove the possibility of a tract of land being without access to the public right-of-way.

(b) No structure that will impede the flow of vehicular traffic shall be constructed within this designated easement.

(c) Cross-access easements shall have a minimum width of 24 feet, a centerline curve radius of 35 feet and a minimum tangent of 50 feet between reverse curves.

(d) Cross-access easements shall be dedicated and recorded with the plat if a plat is required. If a plat is not required, the easement shall be recorded by separate instrument with the county clerk's office. A copy of the recorded document shall be provided as part of the permit approval process.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Roadway material and subgrade designs shall conform to city standard details.

(b) Roadways shall have the following design characteristics:

(c) Curves.

(1) Horizontal curves. Except as provided for in this subparagraph 109-76(c)(1), the following minimum horizontal curves shall be met.

a. Local streets shall have a minimum centerline radius of 300 feet. Under no circumstance shall a local street have a centerline radius of less than 150 feet.

b. Collector streets shall have a minimum centerline radius of 800 feet.

c. Arterial streets shall have a minimum centerline radius of 2,000 feet.

d. The horizontal sight line offset shall be determined using the methods described in the AASHTO publication, a policy on geometric design of highways and streets, as amended. The HSO shall be kept clear of all visual obstructions more than 42 inches above the surface of the roadway.

e. A variance request to any requirement under this subsection (c), may be made to the commission. If the commission finds that the horizonal curves required under this subsection provide a hardship and the spirit and intent of this section can still be met, the commission may grant a variance from the requirements under this subsection.

(2) Reverse curves are to be separated by a minimum tangent of 100 feet.

(3) A vertical curve design is required when the algebraic difference in grade exceeds one percent.

(d) Intersections.

(1) The intersection of a public or private roadway with a public or private roadway shall intersect at 90-degree angles.

(2) The intersection of a driveway with a public or private roadway shall intersect at 90-degree angles.

(3) A variance request to requirements under this subsection (d), may be made to the director. If the director finds that the curves required under this section provide a hardship and the spirit and intent of this section can be met, and intersections do not skew more than 15 degrees from perpendicular, the director may grant a variance from the requirements under this subparagraph 109-76(d)(2) and (3).

(4) A sight triangle shall be developed for the intersection of all private or public connection access points to all private or public roadways.

a. The development of each sight triangle shall follow the methodologies presented in the AASHTO publication a policy on geometric design of highways and streets, as amended.

b. Sight triangles shall be kept clear of all visual obstructions greater than 42 inches above the roadway surface unless approved by the director.

(5) End returns for intersections shall have the following radii:

(6) The minimum grade line from one end return point to the other shall be 0.70 percent.

(e) Right-of-way layouts.

(1) Acquisitions, classifications or dedications for local streets must be a minimum 54-foot wide right-of-way and developed with a minimum of one 15-foot lane in each direction and a five-foot sidewalk adjacent to the street on both sides, as illustrated in illustration 109-76(e)(1) below, and in continuity with any connecting right-of-way(s), as interpreted by the director.

Illustration 109-76(e)(1)

(2) Acquisitions, classifications or dedications for collector streets must be a minimum 100-foot wide right-of-way and developed with a minimum of two 12-foot lanes in each direction, a 16-foot wide median separating the two lanes, a five-foot sidewalk adjacent on one side of the street and a ten-foot path adjacent to the opposite side of the street, as illustrated in illustration 109-76(e)(2) below, and in continuity with any connecting right-of-way(s), as interpreted by the director.

Illustration 109-76(e)(2)

(3) Acquisitions, classifications or dedications as arterial streets and higher must be a minimum 120-foot right-of-way and developed with a minimum of two 12-foot lanes in each direction, a 40-foot median or a 16-foot median if developed with three 12-foot lanes in each direction, a five-foot sidewalk adjacent to the road on one side and a ten-foot path on the opposite side of the street, as illustrated in illustration 109-76(e)(3) below, and in continuity with any connecting right-of-way(s), as interpreted by the director.

Illustration 109-76(e)(3)

(Ord. No. 14,605, § 8, 12-10-20; Ord. No. 15,326, § 1, 1-12-23)

Each right-of-way developed under this chapter must be improved and maintained with streetlights in accordance with this section.

(1) The installation and cost of materials, installation and electric service is the responsibility of the person or entity responsible under the laws of the City of Baytown for the right-of-way being improved. If the City of Baytown accepts the improved right-of-way, the cost of maintaining and electric service will be borne by the City of Baytown.

(2) Streetlights shall be installed and maintained as follows:

a. Except for the luminaires portion of the streetlight, the exterior portion of the streetlight, including the pole, must be powder-coated black.

b. Luminaires shall be 250W equivalent LED.

c. Streetlight poles shall follow the guidelines presented in the City of Baytown Roadway Illumination Standards.

d. Spacing and number of streetlights must ensure the illumination levels needed for the type of roadway, adjacent land uses, and aesthetics of the surrounding area to be served and must be no lower than the foot-candle values in the table below.

(Ord. No. 14,605, § 8, 12-10-20; Ord. No. 15,326, § 2, 1-12-23)

Street name signs approved by the director shall be provided and installed at all intersections by the entity responsible for the installation of the roadway.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Cross-access easements are required and shall be provided in accordance with article II of this chapter.

(b) Connection access spacing.

(1) The location of any nonresidential access connection point to a public right-of-way, street or alley shall be approved by the director prior to the issuance of a construction permit.

(2) If a tract of land which is to be divided, subdivided, developed, or redeveloped has an existing access connection point, this existing access connection point does not need the approval of the director to remain; provided that, the nature, character, or volume of vehicular traffic to or from the tract of land does not change. If the nature, character, or volume of the vehicular traffic to or from the tract of land changes due to the division, subdivision, development, or redevelopment of said tract, then all access connection points for the tract shall meet the requirements of this Code.

(3) To provide for the safe ingress and egress of vehicular traffic, to reduce the number of conflict points, and to facilitate traffic flow within the public right-of-way, nonresidential access connection points shall be placed no closer than the following distances from an existing or proposed access connection point, as measured between the nearside edges of the vehicular traveled ways:

(4) When the separation requirements for nonresidential connection access points cannot be achieved because of the location of existing or proposed access connection points, the director may grant a separation variance for a connection access point provided the applicant provides documentation showing all of the following:

a. The minimum separation requirements cannot be met due to existing or proposed access connection points;

b. The applicant has made good-faith efforts to obtain cross access from an adjacent land-owner, who can provide the applicant with an acceptable connection access point to public right-of-way, and failed. This good-faith effort is to be documented and provided as part of the variance submittal process; and

c. Access cannot be obtained from any other public right-of-way or private access connection point.

When granting a separation variance, the director will indicate the approved location of the connection access point.

(c) Driveway alignment.

(1) Proposed access connection points shall align with existing and proposed access connection points on the opposite side of the public right-of-way, street or alley and meet the minimum separation requirements from existing and proposed access connection points on both sides of the public right-of-way, street or alley. Access connection points must be aligned with existing median openings or meet the access point separation requirements treating the median openings as a connection access point.

(2) Connection access points proposed along a public right-of-way, street or alley which is physically divided by a non-traversable median or other method are not required to align with or meet the connection access point separation to, from or with a connection access point on the opposite side of the physical divide.

(3) Cross-median access shall not be granted, allowed or provided for when a proposed connection access point does not align with or meet the connection access point separation to, from or with a connection access point on the opposite side of a physical divide.

(4) At an intersection where a public street terminates at the intersection of a connecting cross street, a nonresidential connection access point on the cross street in alignment with the terminating street must safely accommodate the cross section of the intersection street.

(5) Residential connection access points shall not be placed within the intersection of two streets or alleys.

(6) Residential connection access points shall maintain a minimum spacing of 30 feet from an adjacent, parallel publicly traveled way.

(7) Connection access points shall not be placed within acceleration, deceleration, left-turn or right-turn lanes.

(8) Driveways are not allowed within signalized intersections unless a variance from the director is granted; provided:

a. The driveway's egress approach traffic volume is at least half of the approach volume for the opposing intersection approach.

b. The cross-section of the proposed driveway aligns with and can accommodate the traffic flow from the intersecting approach.

c. The minimum connection access point spacing for all other connection access points is maintained.

d. The driveway's egress approach traffic would satisfy either Warrant 1 or Warrant 2, as described in Chapter 4 of the Texas Manual on Uniform Traffic Control Devices.

(9) Residential lots may have only one connection access point to publicly maintained rights-of-way or alleys unless:

a. The frontage for the lot exceeds 75 feet in width;

b. The connection access points are connected, as with a circular drive;

c. The total number of connection access points for the lot does not exceed two;

d. The spacing between the connection access points is at least 40 feet;

e. The width of each connection access point is no greater than 16 feet; and

f. All other connection access point connection spacing requirements are met.

(10) Residential connection access points may not be made with roadways classified as a collector or greater without approval of the director.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Permit required.

(1) A permit issued from the director is required prior to constructing a connection access point to a publicly maintained roadway.

(2) A permit issued from the director is required prior to reconstructing a connection access point to a publicly maintained roadway.

(3) Driveway construction permits will only be approved for sites:

(1) As a part of a current building permit application;

(2) As a part of a current engineering permit application; or

(3) To reconstruct or modify an existing driveway that is serving an existing, active, permitted structure or land use.

(b) Design.

(1) All connection access points are to be designed in accordance with the current city driveway standards.

(2) The width of a driveway is measured at the right-of-way line.

(3) Nonresidential driveways located on collector streets or above shall have a minimum throat depth of 20 feet, measured from and perpendicular to the right-of-way line.

(c) Demolition. On sites where a demolition order has been issued pursuant to any lawful authority, including section 18-129 or section 18-1337 of this Code, each driveway serving the building(s) to be demolished shall also be demolished.

(1) If the demolished driveway was connected to a curbed roadway, a curb shall be constructed within the gap created by the demolished driveway.

a. The area behind the newly constructed curb shall be backfilled to match the existing natural ground on either side of the demolished driveway.

b. The backfilled area shall have vegetation established in a manner acceptable to the director.

(2) If the demolished driveway crossed a roadside ditch, the driveway culvert shall be removed and the area converted to a roadside ditch matching the cross section, slope and capacity of the existing roadside ditch.

(3) If the demolished driveway was connected to a roadway without curbs, the area between the edge of the roadway and the right-of-way shall be backfilled to match the existing natural ground on either side of the demolished driveway. The backfilled area shall have vegetation established in a manner acceptable to the director.

(4) Sidewalk within the demolished driveway.

a. If the sidewalk was an ADA-compliant path that met current city sidewalk standards, the sidewalk may remain after demolition.

b. If the sidewalk was not ADA-compliant or did not meet the current city sidewalk standards, the sidewalk shall be replaced with an ADA-compliant path that meets the current city sidewalk standards.

(Ord. No. 14,605, § 8, 12-10-20)

(a) All sidewalks within the publicly maintained right-of-way shall follow the Pedestrians in the Right-of-Way Accessibility Guidelines as proposed by the United States Access Board.

(b) Sidewalk designs shall conform to the current city standard details.

(Ord. No. 14,605, § 8, 12-10-20)

Adequate drainage shall be provided within the limits of the development. No proposed development shall impede the natural flow of surface runoff from adjacent lands, nor cause flooding on adjacent properties. The maximum allowable discharge rate from a proposed development or re-development to a receiving body or system shall be the undeveloped flow rate for the area of development or re-development. It is not permissible for a development to sheet flow overland flow to the public right-of-way.

(Ord. No. 14,605, § 8, 12-10-20)

For all developments, the sizing of inlets, storm sewers, outfalls, culverts and drainage ditches shall be based upon the following:

(1) Design storm event. The design storm intensities within the city limits, shall be based upon the Harris County Region 3 NOAA Atlas 14 Rainfall Data for the five-year and 100-year frequencies. The intensities shall be calculated using the following equation:

Where:

a. I = intensity (in/hr)

b. b =

▶ 52.32 (5-year)

▶ 60.66 (100-year)

c. T _c = time of concentration

▶ The initial T _c shall be calculated by dividing the length of the longest, most direct path of travel, point to point, by the applicable minimum velocities in the following table. If the initial T _c is calculated to be less than 10 minutes, use an initial T _c of 10 minutes.

▶ The pipe flow T _c shall be calculated by dividing the upstream pipe reach by the actual pipe flow velocity (in that same reach and calculated using the continuity equation) and adding it to the upstream T _c .

▶ The use of any other method shall require the approval of the director.

d. d =

▶ 7.88 (5-year)

▶ 4.44 (100-year)

e. e =

▶ 0.69 (5-year)

▶ 0.5797 (100-year)

(2) Runoff computation.

a. To determine the runoff rates for various areas, the standard rational method shall be used, utilizing the following formula:

Q = C × I × A

Where:

Q = volumetric flow rate of runoff in cubic feet per second (cfs)

C = runoff coefficient, either composite or simple

I = rainfall intensity in inches per hour

A = analysis area in acres

b. Calculation of the runoff coefficient: The runoff coefficient (or C factor) "C" values in the rational method formula will vary depending on the studied land use. There are two acceptable methods of establishing the C factor for a development or project. The method used to calculate the C factor shall be included with the required drainage area calculations.

a. Method 1 (composite method) calculates a weighted average of all the different C factors of all the sub-areas contributing to the overall study area. The calculations and values used to determine the weighted C factor shall be included with the drainage area calculations. The following C factors are acceptable:

The weighted average shall be calculated usmg the following equation:

b. Method 2 (simple method) allows the engineer to select a pre-defined C factor for the entire study area. A selected, pre-defined, C factor must be compatible with the land use being studied. The following pre-defined C factors are acceptable:

(3) Drainage areas shall be:

a. Defined and delineated using the natural and proposed high points and the property boundaries, where appropriate; and

b. Each proposed drainage area shall have a single runoff collection point, no fewer.

(4) Drainage calculations for both the five-year and 100-year conditions shall be included in the proposed plans and shall run from node to node to the outfall structure.

(5) The hydraulic grade line for five-year events shall not extend above the top of pipe.

(6) The hydraulic grade line for 100-year events shall not extend more than 12 inches above the top of curb.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Design.

(1) All storm sewers.

a. Sizing of storm sewers. Sewers shall be sized to carry the discharge (Q) derived from the rational method. Stormwater collection systems shall be designed to carry the five-year Q up to the last inlet or set of inlets. Unless the stormwater collection system is connecting to an existing storm sewer system, an extreme event conveyance structure shall be constructed between the last inlet or set of inlets and the detention structure. The design velocity for sewers shall be calculated using Manning's equation and shall not be less than 3.0 feet per second (fps) for the five-year storm. The actual velocity for storm sewers shall be calculated using the continuity equation and shall not exceed 8.0 fps for the five-year storm.

b. Sizing and spacing of inlets. Inlets shall be spaced no more than 300 feet from a high point for the street, measured along the gutter line. Inlets shall be located at low points in the street/gutter. The following inlet types, as shown on the city standard details, are acceptable. Any other inlet type or configuration must be approved by the director.

1. Type A inlets may be used in parking lots and grassy or vegetated areas.

2. Type C inlets may be used as curb inlets.

3. Type E inlets may be used in ditches.

(2) City maintained storm sewers, outfalls, culverts and drainage ditches shall conform to the following:

a. Manhole locations. Manholes (on inlets or junction boxes) shall be provided at a maximum spacing of 800 feet, measured along the conduit run and at all:

1. Pipe size or cross-section changes;

2. Inlet lead and conduit intersections;

3. Changes in pipe grade; and

4. Street intersections.

b. Pipe.

1. Size.

i. Storm sewer pipes designed to carry less than five cfs of flow shall have a minimum nominal diameter of 18 inches or equivalent cross section.

ii. Storm sewer pipes designed to carry more than five cfs of flow shall have a minimum nominal diameter of 24 inches.

iii. Box culverts shall have a minimum nominal size of two feet by two feet.

2. Material.

i. Reinforced concrete pipe is preferred for storm sewer pipes;

ii. Upon approval from the director, a different material may be selected from the approved products list, maintained by the director.

3. Cover. The minimum amount of cover, from the top of the pipe to natural ground, final grade, or bottom of road subgrade is 24 inches.

c. Ditches. The use of drainage ditches must be approved by the director. If approved, the ditch shall conform to the following:

1. The roadside ditch shall be designed to carry the five-year event and maintain at least six inches of freeboard;

2. The design shall be evaluated under the 100-year storm conditions to show that nearby habitable structures will not be flooded;

3. The maximum velocity for a grass-lined ditch shall be 3.0 fps;

4. Side slopes are to be no steeper than 3:1; and

5. The longitudinal, or running slope, shall not be less than 0.1 percent.

(3) Privately maintained storm sewers, outfalls, culverts and drainage ditches shall conform to the following:

a. Manholes. At a minimum, manholes shall be placed upstream of the outfall structure.

b. Pipe.

1. Size.

i. Storm sewer pipes designed to carry less than five cfs of flow shall have a minimum nominal diameter of 18 inches or equivalent cross section.

ii. Storm sewer pipes designed to carry more than five cfs of flow shall have a minimum nominal diameter of 24 inches.

2. Material. If the storm sewer collection system is designed to connect to a city maintained structure, the pipe run making the connection shall be reinforced concrete pipe conforming to the latest revision of ASTM C-76, Class III.

c. Ditches.

1. Ditches shall be designed to carry the five-year event and maintain at least six inches of freeboard.

2. The designs shall be evaluated under the 100-year storm conditions to show that the on-site structures will not be flooded.

3. The maximum velocity for flow in the ditch shall be 3.0 fps.

4. Side slopes are to be no steeper than 3:1.

(4) Outfalls. All outfall structures shall be designed to conform to the city standard details.

(5) Extreme event conveyance. All drainage systems that outfall to a detention facility shall provide conveyance for the extreme event (100-year storm). If the storm sewer network is designed to carry less than the 100-year event, with the remaining Q carried by the roadway network, an extreme event conveyance structure shall be constructed.

a. Types.

1. Extreme event overflow swale.

i. The required swale capacity shall be the difference between the five-year design Q for the storm sewer outfall and the 100- year developed Q for the outfall;

ii. The swale shall have a minimum of six inches of freeboard;

iii. If the swale is grass-lined, it shall have a maximum velocity of 3.0 fps; and

iv. If the swale is concrete-lined, it shall have a maximum velocity of 5.0 fps.

2. One-hundred-year inlets. The required inlet capacity shall be the difference between the five-year design Q for the storm sewer upstream of the inlets and the 100-year developed Q for the storm sewer upstream of the inlets.

(Ord. No. 14,605, § 8, 12-10-20)

All detention facilities should be designed for easy maintenance. Consideration should be given to designing the facility for multipurpose uses.

(1) Detention required.

a. Detention shall be provided for all new development projects greater than one acre.

b. Detention requirements for property subdivided after January 1, 2021, shall be determined based upon the area of the property prior to the subdivision, unless a variance is granted pursuant to section 109-28.

c. Hydrograph timing in lieu of detention shall not be approved.

d. Detention shall be provided for all re-development projects on the basis of the increase in impervious area.

e. Detention shall be provided at a rate of 0.65 acre-feet per acre of the development site unless discharging directly into the San Jacinto River, Burnet Bay, Scott Bay, Black Duck Bay, or Goose Lake. This minimum storage rate does not apply to a single-family residential structure and/or accessory buildings proposed on an existing lot.

(2) Design requirements.

a. An earthen detention basin shall have side slopes no steeper than 3:1 and a minimum bottom width of ten feet.

b. A five-foot wide, six-inch thick reinforced concrete trickle channel shall be constructed through the basin bottom.

c. The bottom of the detention basin shall have a minimum 0.2 percent cross slope to facilitate quick drainage.

d. Inlets, outlets, and required trash racks shall be located for easy accessibility.

e. The establishment of vegetative growth shall be accomplished by hydro-mulching the facility with Bermuda grass seed and watered per the supplier's instructions. The establishment of vegetative growth over 90 percent of the detention facility shall be a requirement for passing the final inspection.

f. City maintained detention facilities shall have a dedicated maintenance driveway that conforms to City of Baytown standard details.

g. Vertical wall detention ponds will require the approval of the director.

h. Facilities located in nonresidential zones shall conform to the requirements of section 3.10(c) of the Unified Land Development Code.

i. The allowable detention credit for subsurface detention facilities shall be limited to the volume of clear space within the chambers, vaults, baffles, bladders or other structure designed to detain the stormwater runoff.

j. When designing the detention pond discharge, the designer shall follow the requirements of the Harris County Flood Control, Chambers County, TxDOT, City of Baytown or other entity responsible for maintaining the receiving body, channel, ditch, swale, pipe, or other structure. Proof of permission or no-objection will be required prior to the issuance of a City of Baytown permit.

(Ord. No. 14,605, § 8, 12-10-20)

All water distribution and wastewater collection systems are to be located either in rights-of-way or in easements that satisfy the requirements of article II of this chapter.

(Ord. No. 14,605, § 8, 12-10-20)

Water distribution and wastewater collection systems in the extraterritorial jurisdiction shall be designed in accordance with the appropriate county standards and the state commission on environmental quality (TCEQ) requirements.

(Ord. No. 14,605, § 8, 12-10-20)

The developer may be required to submit a letter to the director from the department of health resources approving the water distribution and wastewater collection systems. Such a letter will serve as certification of the water distribution system.

(Ord. No. 14,605, § 8, 12-10-20)

Private water and sewer lines shall not cross property lines unless installed in a recorded easement.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Wastewater collection systems shall be designed, constructed and tested to satisfy the requirements of the Texas Administrative Code, title 30, chapter 217.

(b) Wastewater collection systems shall be designed and constructed to conform to the current city standard details.

(c) Manholes shall be spaced at a distance not to exceed 400 feet.

(d) Lift station locations shall be designed to include an all-weather access road, three-phase electrical service, and potable water shall be provided. All structures located above ground shall be enclosed as specified by the director.

(e) All wastewater collection systems shall be tested in accordance with the director's requirements. The entity responsible for the installation of the wastewater system will be responsible for all costs associated with the required testing. All testing results shall be submitted in writing to the director.

(f) Service leads.

(1) Nonresidential sewer leads shall connect to the system at manholes; however, no more than one service lead shall connect to a single manhole without the approval of the director.

(2) Each service lead shall only serve a single tract of land or property.

(3) Nonresidential sewer leads shall have a minimum diameter of six inches and a slope of no less than 0.50 percent.

(Ord. No. 14,605, § 8, 12-10-20)

(a) Water distribution systems shall be designed, constructed and tested to satisfy the requirements of the Texas Administrative Code, title 30, chapter 290.

(b) Water distribution systems shall be designed and constructed to conform to the current city standard details.

(c) The minimum size of lines within the public water distribution system is six inches. The maximum length of a single six-inch line is 1,000 feet and must be fed by an eight-inch waterline or greater.

(d) Water distribution lines serving dead-end and cul-de-sac streets shall be looped back to connect to itself at least 50 feet before the first mechanical bend creating the loop.

(e) No water distribution system lines shall be terminated, either temporarily or permanently, without a flushing or blow-off valve at the terminus of the line.

(f) At intersections of water distribution lines, the number of valves shall be one less than the number of radiating lines.

(g) Each service lead shall only serve a single tract of land or property.

(h) Water meters shall be located within the public right-of-way. If it is infeasible to locate the water meter within the right-of-way, it may be placed within a recorded water meter easement with the approval of the director.

(Ord. No. 14,605, § 8, 12-10-20)