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Brazoria County (Unincorporated)(3 more)
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| Field | Local Brazoria County (Unincorporated) Brazoria County Engineering Department |
|---|---|
| Permit | |
| Permit / Authorization | Drainage Permit / Floodplain Development Permit |
| Submit To | Brazoria County Engineering Department |
| Lead Time | Plan review typically 2–4 weeks |
| Application Method | Submit via Brazoria County Engineering at 111 E. Locust St., Angleton, TX 77515 or online portal; Brazoria County Drainage District permits required separately |
| Fee | Contact agency for current fee schedule |
| Water Quality | |
| Impervious Cover Limit | No countywide impervious cover cap; drainage systems must accommodate design storm flows per Brazoria County Drainage Criteria; multiple drainage districts operate within the county |
| On-Site Treatment Required | No |
| Detention Required | Yes — Detention required to limit post-development peak flows to pre-development levels for 2-, 10-, 25-, and 100-year storms per Brazoria County and applicable Drainage District criteria; post-Harvey design standards updated; flat coastal plain terrain requires conservative detention sizing |
| Turbidity / Discharge Standard | No numeric NTU limit; discharges must comply with TCEQ TXR150000 and not degrade Brazos River, San Bernard River, Chocolate Bayou, or Galveston Bay tributaries |
| SWPPP | |
| SWPPP / Local Plan Required | Yes — SWPPP per TCEQ TXR150000; drainage report required for county permits |
| PE Stamp Required | Yes |
| Inspections | |
| Inspection Requirements | Brazoria County Engineering inspects county-permitted development; drainage districts inspect work adjacent to or connecting to their channels. Hurricane season requires active BMP maintenance. |
| Inspector Qualification | No county-specific certification required beyond TCEQ SWPPP requirements |
| Design & Zones | |
| Local Design Manual | Brazoria County Drainage Criteria |
| Special Overlay Zones | Brazos River Floodplain, Brazoria County Drainage Districts, Galveston Bay TMDL Watershed, Coastal Zone / Gulf Coast Proximity |