Katy vs Richmond
How do grading & drainage rules compare between Katy, TX and Richmond, TX?
Katy and Richmond have similar restriction levels.
Katy, TX
Fort Bend County
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.
View full Katy rules →Richmond, TX
Fort Bend County
Richmond regulates grading, fill, and drainage improvements through UDC Division 4.3.400 and the Public Infrastructure Design Manual, requiring engineered plans and Public Works approval for site work.
View full Richmond rules →Key Facts Comparison
| Fact | Katy | Richmond |
|---|---|---|
| Design storm | 2-year, no surcharge | - |
| Min gradient | 0.1 percent | - |
| Pipe class | Class III RCP | - |
| Channel standard | HCFCD PCPM 2019 | - |
| Reviewer | City engineer | Public Works |
| UDC Division | - | 4.3.400 |
| Manual Chapters | - | Chapters 7 and 12 |
| Plans By | - | Licensed engineer |
Highlighted rows indicate differences between cities.
Katy FAQ
What design storm do storm sewers handle?
Storm sewers in Katy must contain a two-year storm event within the pipe without surcharging, per the city's minimum construction standards.
Which pipe materials are accepted?
Class III reinforced concrete pipe is the standard. Alternatives require approval from the city engineer along with calculations supporting the substitution.
Do open channels need detention design?
Yes. Open channels and detention ponds must follow Harris County Flood Control District PCPM (July 2019) hydrology and design methodology in Katy subdivisions.
Richmond FAQ
Do I need a permit to grade my property in Richmond?
Most regulated grading and fill in Richmond requires plans approved by Public Works under UDC Division 4.3.400 and the Public Infrastructure Design Manual, especially when tied to a site development application.
Can I redirect drainage onto my neighbor's lot?
No. Richmond requires grading and drainage designs that do not adversely affect adjoining properties. Redirecting runoff onto neighbors can trigger code enforcement and civil liability.
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