Rowlett, TX Environmental Rules: Stormwater Management (2026)
Key Facts
- Residential curb overflow limit
- 1.5 inches max
- Street flow cap
- 45 cfs
- Design storm
- 100-year recurrence interval
- Plans require
- Texas-registered professional engineer
Summary
Rowlett requires storm sewer inlets sized to keep 100-year design-storm flows under 1.5 inches over residential street curbs, capping street flow at 45 cubic feet per second under the Development Code's drainage engineering standards.
Storm sewer inlets shall be provided along paved streets at such intervals as are necessary to limit the depth of flow as follows: (a) Residential streets. Based on parkway slopes of one-fourth of an inch per foot behind the curb, the 100-year design frequency flows shall not exceed a depth of one and one-half inches over the top of the curb. A maximum flow of 45 cfs will be allowed in the street.
Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 29).
Full Breakdown
The Development Code's drainage chapter sets engineering standards for every storm drainage facility built in the city. Storm sewer inlets along paved streets must be spaced to limit ponding: on residential streets, with parkway slopes of one-quarter inch per foot behind the curb, the 100-year design frequency flow may not exceed a depth of one and one-half inches over the top of the curb, with a maximum street flow of 45 cfs. Collector streets and major thoroughfares carry their own curb-overtopping limits. Complete engineering plans for the facilities must be prepared by a Texas-registered professional engineer and approved by the city engineer.
Violations & Fines
Development that doesn't meet the flow and inlet-capacity standards can be denied preliminary plat or site plan approval, and the city engineer can order corrections to the drainage design before construction proceeds.
Frequently Asked Questions
Does Rowlett regulate stormwater runoff from new development?
Who approves stormwater plans in Rowlett?
Sources & Official References
Other rules in Rowlett
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Stormwater Management in Nearby Cities
How other cities in Dallas County handle stormwater management.