Katy, TX Environmental Rules: Erosion Control (2026)
Key Facts
- Design storm
- 2-year, no surcharge
- Min gradient
- 0.1 percent
- Pipe class
- Class III RCP
- Channel standard
- HCFCD PCPM 2019
- Reviewer
- City engineer
Summary
Katy's minimum construction standards require storm sewers to contain a two-year storm without surcharging at minimum 0.1% gradient using Class III concrete pipe and follow Harris County PCPM hydrology standards.
Sec. 232.003. SUBDIVISION REQUIREMENTS. By an order adopted and entered in the minutes of the commissioners court, and after a notice is published in a newspaper of general circulation in the county, the commissioners court may:(1) require a right-of-way on a street or road that functions as a main artery in a subdivision, of a width of not less than 50 feet or more than 100 feet;(2) require a right-of-way on any other street or road in a subdivision of not less than 40 feet or more than 70 feet;(3) require that the shoulder-to-shoulder width on collectors or main arteries within the right-of-way be not less than 32 feet or more than 56 feet, and that the shoulder-to-shoulder width on any other street or road be not less than 25 feet or more than 35 feet;(4) adopt, based on the amoun
Full Breakdown
Katy's Minimum Construction Standards supplement the subdivision development ordinance and define requirements for street, utility, and drainage construction in new subdivisions. Storm sewers must be sized so that a two-year storm is contained within the pipe without surcharging, with a minimum gradient of 0.1 percent or as approved by the city engineer, using Class III reinforced concrete pipe. Hydrology and methodology for the design of open channels and detention ponds must follow Harris County Flood Control District PCPM standards dated July 2019. Subdivision plats must show adequate drainage to reduce flood exposure. Lot grading must direct runoff away from structures and adjacent properties. The city engineer reviews all drainage plans.
Violations & Fines
Submitting plans that cause surcharging in a two-year storm, using non-conforming pipe, ignoring HCFCD PCPM design rules, or grading lots so runoff floods neighbors triggers plan rejection or enforcement.
Frequently Asked Questions
What design storm do storm sewers handle?
Which pipe materials are accepted?
Do open channels need detention design?
Sources & Official References
Other rules in Katy
Texas rules heatmap·Compare Katy to another location·View the Texas environmental rules overview
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Erosion Control in Nearby Cities
How other cities in Fort Bend County handle erosion control.