Midland County, TX Environmental Rules: Erosion Control (2026)

9, Engineering Plans, lists the packet of technical submittals every plat application must carry beyond the plat map itself: drainage area maps, storm water flow calculations, detention and retention basin design, water and sewer line plans, and among them, an Erosion Control Plan. The Regulations do not let the county write its own separate erosion standard; instead they point developers straight at state law, requiring the erosion and stormwater quality control plan to comply with the Texas Commission on Environmental Quality's construction general permit, TXR150000, the same permit TCEQ requires statewide for sites disturbing an acre or more.

8: any development in Midland County must submit a drainage study specific to the drainage areas found within and adjacent to the proposed subdivision, and where FEMA has mapped a Zone A special flood hazard area without published water surface elevation data, the county requires base flood elevation data for any subdivision proposal larger than fifty lots or five acres, whichever is smaller. The Director of Public Works reviews and approves the Engineering Plans package, including the Erosion Control Plan, before the plat can move to Commissioners Court for authorization.

Because Midland County has no zoning authority, this permit-condition approach, tying local plat approval to state TCEQ compliance, is the mechanism the county actually has under Local Government Code Chapter 232 to control construction-site erosion; it does not create an independent county erosion ordinance.