The intention of these standards is to define minimum requirements for street, utility, and drainage construction in new subdivisions within the jurisdiction of the city. These standards are supplementary to the city's subdivision development ordinance, including subsequent amendments.
(Ordinance 2011-11, sec. 1.01, adopted 12/20/2011)
The following minimum standards apply to subdivision street paving:
(1) 
Type.
Six inches of reinforced concrete surface with concrete curb and gutter.
(2) 
Pavement width.
a. 
Major streets.
44 feet to 64 feet between back of curbs.
b. 
Secondary streets.
38 feet to 44 feet between back of curbs.
c. 
Residential streets.
28 feet to 32 feet between back of curbs.
(3) 
Cross-section.
A standard cross-section for a residential street is shown in the city's standards paving detail sheet. Cross-sections for secondary and major streets shall be proportioned similarly. At intersections, curb return radius shall be 25 feet; at cul-de-sacs, 45 feet.
(4) 
Concrete.
a. 
Reinforcing steel.
1. 
Material: Open hearth new billet steel.
2. 
Yield strength: 60,000 psi, minimum.
3. 
Splices: 24 bar diameters.
4. 
Bar size and spacing: No. 3 bars at 18-inch centers, each way, minimum. Street should be designed based upon the subgrade and load use of street.
5. 
Bar support: Metal or plastic "chairs" shall be used to hold bars in position during placement of concrete.
b. 
Concrete mixture.
1. 
Compressive strength: 3,000 psi, minimum at 28 days.
2. 
Slump: 4-1/2 inches maximum.
3. 
Cement factor: 5.0 bags per cubic yard, minimum.
c. 
Cement.
Type I (normal) Portland cement, or with city engineer's approval, Type III (high early strength).
d. 
Aggregate.
Coarse and fine aggregate shall meet the requirements of the state highway department standard specification "Item 360" for concrete pavement.
e. 
Jointing.
1. 
Expansion joints with sleeved load transmission dowels at intersections. Also every 80 linear feet, minimum.
2. 
Wood joints: Sound heart redwood.
3. 
Joint seal: OA 90 asphalt or other types with approval.
f. 
Curing.
Curing method shall retain at least 97 percent of moisture at 24 hours, at least 95 percent at three days, and at least 91 percent at seven days (ASTM procedure C-5).
g. 
Test.
Compressive strength: three cylinders every 50 cubic yards of concrete or portion thereof. Testing lab is to be supplied by the developer.
h. 
Placement.
Concrete shall not be placed on frozen subgrade: when air temperature is 38 degrees Fahrenheit or below; when air temperature is below 42 degrees Fahrenheit and declining; when finishing cannot be completed during natural daylight.
(5) 
Subgrade.
a. 
Rolling machinery.
All subgrade shall be rolled.
b. 
Density required.
At least 95 percent of maximum density (standard Proctor density test).
c. 
Lime stabilization.
Required when plasticity index (P.I.) of subgrade soil exceeds 18.
d. 
Cement stabilization.
Required when low P.I. spongy or wet soils.
e. 
Subgrade.
Subgrade shall not be allowed to dry before concrete or base is placed, nor shall concrete or base be placed on frozen subgrade.
f. 
Density tests.
At 200-linear-foot intervals, or closer when requested by city engineer. Density tests shall be staggered across the width of the pavement. At no point should density tests be taken in a straight line. At least one density test must be taken on the outside edge of the pavement in cul-de-sacs.
(6) 
Large lot subdivision.
Where every lot in a subdivision is in excess of one acre in size and the natural grade of the tract to be subdivided has at least three feet of drop per 1,000 feet, an open ditch cross-section of road will be allowed.
a. 
Pavement type.
1. 
Concrete meeting section 26-36.
2. 
Asphalt cross-section.
3. 
One and one-half inches of hot mix asphalt Type D meeting TxDOT Item 340 (24-foot width).
4. 
Eight inches of compacted limestone meeting TxDOT Item 247, Type A, grade 2 (25-foot width).
5. 
Subgrade meeting section 26-36(5).
b. 
Pavement width.
1. 
Residential streets: 24 feet edge to edge.
2. 
All other streets require concrete meeting section 26-36(2).
c. 
Cross-section.
A standard cross-section for a residential street is shown on the city's standard paving detail sheet.
(Ordinance 2011-11, sec. 1.02, adopted 12/20/2011; Ordinance adopting 2025 Code)
Sidewalks shall meet the following minimum standards:
(1) 
Dimensions.
a. 
Width.
Four feet, zero inches, minimum.
b. 
Thickness.
Zero feet, four inches, minimum.
(2) 
Subgrade.
Two inches of compacted sand.
(3) 
Cross slope.
One-quarter inch per foot, toward curb. Slopes on sidewalks must be ADA compliant.
(4) 
Reinforcing.
Reinforcing shall be No. 3 rebar at no greater than 18 inches C-C or No. 10 six by six welded wire mesh supported by either chairs or c.m.u. bricks.
(5) 
Load transmission devices.
Load transmission devices (dowels) shall be No. 4 rebar, 12 inches long, embedded six inches either side of expansion joint, one end shall be sleeved. Set load transmission devices 12 inches C-C, maximum.
(6) 
Expansion joints.
Expansion joints are to be spaced ten feet C-C and are to be sound heart redwood, three-fourth-inch thick with OA 90 asphalt or approved sealer.
(7) 
Control joints.
Control joints are to be cut (one-quarter by W) at no greater than five-foot C-C spacing.
(8) 
Location.
As per figure I, as shown on standard detail sheet.
(Ordinance 2011-11, sec. 1.03, adopted 12/20/2011)
The following minimum standards apply to water system extensions within the city:
(1) 
Main lines.
a. 
Minimum diameter:
Six inches.
b. 
Depth:
Three feet, six inches of cover below final grade.
c. 
Material:
C-900 PVC DR 18.
d. 
Location:
As shown on standard detail sheet. Mains shall be looped, with no dead ends serving more than four lots.
e. 
Mains shall be looped with no dead-end serving more than four lots.
(2) 
Valves.
a. 
Locations:
At tees, two valves. At crosses, three valves. At each connection to existing water system, one valve.
b. 
Type:
Non-rising stem, O-ring seals, Mueller or Clow brand. Counter-clockwise opening, mechanical joint.
(3) 
Fire hydrants.
a. 
Locations:
At each street intersection and cul-de-sac end. Single-family residential areas: 500-foot intervals, maximum; commercial, including reserves: 300-foot intervals, minimum.
b. 
Type:
Mueller brand or approved equivalent, three-way 5-1/4 inch barrel with 4-1/2 inch steamer (pumper) nozzle and two 2-1/2 inch hose nozzles. Counter-clockwise opening, mechanical joint. Each fire hydrant is to have an individual gate valve (with adjustable riser box) located within four feet of the fire hydrant.
(4) 
Fittings.
a. 
Material:
Cast iron, cement lined, mechanical joint. All fittings are to be thrust blocked with concrete. All fittings are to be wrapped with plastic or similar materials to prevent concrete from adhering to the mechanical joint connection components.
b. 
Pressure rating:
250 psi.
(5) 
Services.
a. 
Corporation stop:
Mueller H-15000 or approved equivalent.
b. 
Curb stop:
Mueller H-15275 or approved equivalent, ending in an approved concrete or plastic meter box. (All boxes in new development are to be of the same material.)
c. 
Meter nipple required:
Mueller H-10890G or approved equivalent.
d. 
Pipe material:
Soft copper.
e. 
Size:
One inch, one per each residential lot.
f. 
Concrete or plastic meter box of appropriate size is required.
g. 
All curbs are to be marked to indicate the location of the water services for each individual lot.
(6) 
Backfill.
a. 
Under streets:
Wrap water line with six-inch layer of bank sand; remainder of trench to be filled with 1.0 sack (100 psi) per cubic yard cement stabilized sand, compacted to 95 percent Proctor.
b. 
Other locations:
Wrap water line with a six-inch layer of bank sand; remainder of trench to be filled using compacted native soil. Sandy soil must be water jetted; other soils may be compacted by rolling with a tractor or similar method.
c. 
All trenches are to be compacted to 95 percent standard Proctor.
(Ordinance 2011-11, sec. 1.04, adopted 12/20/2011)
All homes must be connected to central sanitary sewer system. The following minimum standards apply to sanitary sewer extensions within the city.
(1) 
Main lines.
a. 
Minimum diameter:
Six inches.
b. 
Minimum depth:
Four feet, zero inches. Exceptions may be made on depth with city approval.
c. 
Material:
1. 
Pipe: SDR 26 PVC.
2. 
Fittings: Same class as pipe, with rubber gaskets. All sanitary sewer lines must be air-tested and pass deflection testing 30 days (or longer) after installation. The city reserves the right to require filming of any sewer installation, at the developer's expense.
(2) 
Manholes.
a. 
Size:
1. 
Four feet, zero inches inside diameter.
2. 
32-inch diameter opening in cone section for access to the sanitary sewer for cleaning and maintenance.
b. 
Spacing:
400 feet maximum and at changes in direction or size of main line.
c. 
Material:
1. 
Pre-cast concrete manhole meeting ASTM C478 (latest revision).
2. 
Cast-in-place manholes shall be 4,000 psi concrete with wall thickness of no less than five inches. The base shall be no less than 12 inches thick.
d. 
Pipe connection:
Each pipe connection to sanitary sewer manholes shall be made watertight by either:
1. 
Approved flexible connectors; or
2. 
Watertight grout.
e. 
Foundations:
Place manhole base on 12 inches minimum of compacted cement stabilized sand.
f. 
Manhole ring and lid:
1. 
Install 32-inch diameter cast iron ring using approved sealant.
2. 
In pavement; adjust ring and cover to grade. (The city may require infiltration prevention measures, to be decided on a case by case basis. If they are required, the developer must pay for them.)
3. 
In unpaved areas; adjust ring and cover to at least six inches above surrounding grade, sloping grade away from the manhole.
4. 
Manhole lid is to have "Sanitary Sewer" cast into it. No other reference is to be cast into the lid.
(3) 
Services.
a. 
Minimum sizes:
1. 
Residential: Single service, four inches; double service, six inches.
2. 
Commercial: Six-inch minimum.
b. 
Material:
Sch. 40 or SDR 26 PVC.
c. 
Fittings required:
Wye, bend, and plug.
d. 
Stack required:
Where sewer depth exceeds six feet, zero inches.
e. 
Marking:
"As built" plans required showing locations, with four-inch by four-inch oak timber marking each service and extending two feet above ground. Painted with a bright color paint. (Capped four-inch diameter PVC pipe may be used in lieu of oak timber.) Curb is to be marked to indicate the location of the sanitary sewer service.
f. 
Bedding:
Cement stabilized sand (one sack per cubic yard). Thickness to be one-half of the pipe diameter beneath the pipe (in no case less than six inches thickness) and to the centerline of the pipe.
(4) 
Backfill.
Same as for water systems.
(5) 
Location.
Except in unusual circumstances and after recommendation by the city engineer and approval of the city council, sanitary mains shall be located in front of lots. They shall be placed within street rights-of-way opposite water mains. If authorized to be placed at rear of lot, mains shall be no closer than five feet to the easement boundary.
(Ordinance 2011-11, sec. 1.05, adopted 12/20/2011)
The following minimum standards apply to drainage construction within new subdivisions. The city has adopted the county drainage district's criteria manual and all drainage calculations and plans shall be approved by the drainage district.
(1) 
Storm sewers and culverts.
a. 
Minimum diameter:
24 inches; 18 inches for pipe serving one inlet.
b. 
Minimum slope; storm sewers:
0.1 percent. Culverts shorter than 100 feet: 0.1 foot.
c. 
Material:
1. 
Class III reinforced concrete pipe.
2. 
High density polyethylene (HDPE) corrugated smooth lined thermoplastic pipe may be used when approved by the city engineer.
3. 
State highway department standard box culverts and headwalls.
d. 
Joints:
1. 
Class III reinforced concrete pipe: bell and spigot joints with O-ring type gaskets.
2. 
High density polyethylene pipe: bell and spigot joints with O-ring type gaskets.
3. 
Box culverts: "Ram-Nek" type asphaltic sealer or approved equal with joints to meet state department of highway specification.
e. 
Bedding:
All storm sewer is to be bedded with 1-1/2 sack per cubic yard of cement stabilized sand, compacted to 12-inch thickness, minimum.
f. 
Backfill:
All storm sewer piping shall be backfilled to a minimum of 12 inches over the top of the pipe with 1-1/2 sack per cubic yard cement stabilized sand, compacted by mechanical means. When using HDPE pipe, caution shall be taken to ensure proper bedding and backfill to meet the manufactures recommendations to provide the structural support necessary.
g. 
Junction boxes and manholes:
1. 
Size: Nominal pipe size plus 102 inches.
2. 
Material: Reinforced concrete, designed for the load. Minimum wall thickness: five inches.
3. 
Location:
(i) 
At changes in pipe size or direction.
(ii) 
At distances not to exceed 400 feet.
4. 
Access covers: 24-inch diameter cast iron ring and cover with the word "Storm" cast into the cover.
h. 
Inlets:
1. 
Minimum throat size: Six inches high by five feet long.
2. 
Material: Reinforced concrete, designed for load.
3. 
Wall thickness: Five inches.
4. 
Access: 24-inch diameter cast iron ring and cover (see subsection (1)g.4. above).
(2) 
Open channels.
a. 
Unlined ditches; side slopes:
Three horizontal, one vertical. Bottom slope: 0.05 percent minimum. Easement width: top width plus 16 feet on one side plus six feet on other side.
b. 
Lined channel:
Bottom slope: 0.05 percent minimum.
c. 
Lining material:
Five inches thick concrete with No. 3 bars at 18 inches center to center. With approval of the city, pre-cast concrete pavement may be used in lieu of concrete.
d. 
Concrete characteristics:
Same as for street paving.
e. 
Easement width:
Top width plus 12 feet on one side and four feet on the other side.
(3) 
Design criteria.
a. 
Storm period:
25 years.
b. 
Runoff coefficient:
1. 
Single-family residential area: 50 percent.
2. 
Commercial areas: 80 percent.
(Ordinance 2011-11, sec. 1.06, adopted 12/20/2011; Ordinance adopting 2025 Code)
For uniformity, street signs shall be approved through the city. Cost of signs and erection are the responsibility of the developer. Signs are required at each street intersection.
(Ordinance 2011-11, sec. 1.07, adopted 12/20/2011)
These construction standards are not intended to replace the regulations of state or federal governmental entities whose jurisdiction includes new subdivisions within the jurisdiction of the city.
(Ordinance 2011-11, sec. 1.08, adopted 12/20/2011)