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City of Lewisville(3 more)
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| Field | Local City of Lewisville City of Lewisville Development Services |
|---|---|
| Permit | |
| Permit / Authorization | Grading / Drainage Permit |
| Submit To | City of Lewisville Development Services |
| Lead Time | Plan review typically 2–4 weeks |
| Application Method | Submit via City of Lewisville Development Services at 151 W. Church St., Lewisville, TX 75057 or online portal |
| Fee | Contact agency for current fee schedule |
| Water Quality | |
| Impervious Cover Limit | No citywide impervious cover cap; drainage systems must accommodate design storm flows per Lewisville Drainage Design Criteria; Lewisville Lake watershed is a primary concern |
| On-Site Treatment Required | No |
| Detention Required | Yes — Detention required to limit post-development peak flows to pre-development levels for 2-, 10-, and 100-year storms per City of Lewisville Drainage Design Criteria |
| Turbidity / Discharge Standard | No numeric NTU limit; discharges must comply with TCEQ TXR150000 and not degrade Lewisville Lake, Elm Fork Trinity River, or downstream water quality |
| SWPPP | |
| SWPPP / Local Plan Required | Yes — SWPPP per TCEQ TXR150000; drainage report required for local permit |
| PE Stamp Required | Yes |
| Inspections | |
| Inspection Requirements | City of Lewisville Development Services inspects grading permits at rough grading and final stabilization. |
| Inspector Qualification | No city-specific certification required beyond TCEQ SWPPP requirements |
| Design & Zones | |
| Local Design Manual | City of Lewisville Drainage Design Criteria |
| Special Overlay Zones | Lewisville Lake USACE Project Boundary, Elm Fork Trinity River Floodplain |