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Commissioners approve detention‑pond wall variances for proposed gas‑station development with conditions
Summary
The court approved variances raising vertical detention walls (from 3 ft to up to 6 ft) for two proposed gas‑station/retail sites, contingent on third‑party drainage review and further negotiation over ingress/egress with property owners and TxDOT.
Planning and engineering staff described two related variance requests tied to proposed gas‑station and future retail development near Plantation Drive and FM 565: one request would increase the standard 3‑foot vertical detention wall to 6 feet at one site; a second requested 5.75 feet where the detention system is gravity‑drained rather than pumped.
Engineering staff said both proposals meet the county’s hydraulic net‑zero requirement and noted third‑party reviewers have modeled the design and not found a net increase in downstream flow, but the variance is necessary because the proposed vertical depth is deeper than current county manual standards. Commissioners emphasized traffic and safety concerns tied to Plantation Drive ingress/egress and suggested conditions: require third‑party approval of drainage calculations, condition approval on acceptable driveway/access arrangements (TxDOT approval where applicable), and ask staff to negotiate with property owners on ingress options before returning to court if needed. A motion to approve the variance was passed with the understanding that third‑party drainage approval and resolution of access issues would be satisfied before final administrative sign-off.
The court did not grant unconditional permission to modify state road access; members noted driveway approvals from TxDOT are separate from the county’s drainage permit process and may require additional review.
