Grading & Drainage: Dallas vs Grand Prairie
How do grading & drainage rules compare between Dallas, TX and Grand Prairie, TX?
Dallas and Grand Prairie have similar restriction levels.
Dallas, TX
Dallas County
Dallas Development Code Sec. 51A-8.611 sets comprehensive requirements for grading and drainage. All storm drainage facilities must be designed to safely convey a 1% annual chance storm event per the Dallas Drainage Design Manual. Erosion control plans are required for any grading or clearing activity. Financial assurance is required for grading improvements. The city requires that development not increase stormwater runoff onto adjacent properties without proper management.
View full Dallas rules →Grand Prairie, TX
Dallas County
Grand Prairie requires Floodplain Development permits for work within 200 feet of the floodplain. All development must comply with the City Drainage Design Manual. Engineering staff review drainage plans for every building permit.
View full Grand Prairie rules →Key Facts Comparison
| Fact | Dallas | Grand Prairie |
|---|---|---|
| Code Section | Sec. 51A-8.611 (Storm Drainage Design) | - |
| Design Standard | 1% annual chance storm capacity | - |
| Manual | Dallas Drainage Design Manual | - |
| Financial Assurance | Required for grading improvements | - |
| Adjacent Property | No increased runoff without management | - |
| Floodplain Permit | - | Within 200 ft of floodplain |
| FEMA | - | Approval may be required |
| Drainage Review | - | Every building permit |
| Master Plans | - | City-wide drainage plans |
Highlighted rows indicate differences between cities.
Dallas FAQ
What drainage standard does Dallas require?
All storm drainage facilities must safely convey a 1% annual chance (100-year) storm event per the Dallas Drainage Design Manual under Sec. 51A-8.611.
Can my development increase runoff to neighboring properties?
Dallas requires that development manage stormwater so as not to increase runoff onto adjacent properties without proper drainage infrastructure.
Grand Prairie FAQ
Do I need a permit for work near the floodplain?
Yes. A Floodplain Development permit is required for any work within 200 feet of the floodplain. FEMA approval may also be needed.
How does drainage review work?
Engineering staff review drainage plans for every building permit to ensure compliance with the City Drainage Design Manual.
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