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Floodplain and drainage questions prompt staff briefing; county to contract drainage design manual
Summary
Floodplain administrator Michael Garza briefed commissioners on existing flood map data, required elevation certificates, subdivision requirements for base flood elevations and the county's plan to commission a drainage design manual (WSP) to clarify technical standards.
Commissioners received a technical briefing on floodplain mapping, elevation requirements and drainage standards from Michael Garza, the county’s engineer supervisor and floodplain administrator, and discussed how those rules affect permitting and subdivisions.
"We do have base flood elevations for the county," Michael Garza told the commission, walking through the National Flood Insurance Program mapping levels and the county’s treatment of unnumbered A zones. Garza described how shallow and depth-based zones (AH) and modeled channel zones (AE) produce different requirements for required elevations. "When a…
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