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Chickasha authority moves to seek $1.69 million local match for Line Creek flood‑mitigation design
Summary
The Chickasha Municipal Authority authorized staff to apply for $1,687,630 in matching funds through ASCOG/ODMRF to complete 100% design work for Line Creek flood mitigation after a WSB presentation that estimated $63 million in construction costs and protection for roughly 800 structures.
The Chickasha Municipal Authority voted to authorize submission of an application under the Oklahoma Disaster Mitigation and Recovery Matching Fund program through the Association of South Central Oklahoma Governments (ASCOG), requesting $1,687,630 to satisfy the required local match for federal design funding for Line Creek flood mitigation.
Consultants from WSB presented preliminary engineering at the meeting, saying the full construction program could cost about $63 million and that initial estimates show the work would protect nearly 800 structures (an estimated population of about 2,100) from recurring flooding. WSB’s project engineer, Zachary Hollinssworth, said the firm’s modeling indicates substantial reductions in the downtown 100‑year floodplain if proposed channel and bridge improvements are built.
Scott B. Chism, a consulting engineer with prior work on local studies, reminded the authority that numerous prior studies have identified constriction points (bridge crossings and rail lines) that contribute to downtown flooding and said the community has largely done maintenance rather than corrective projects in the past. Hollinssworth told the authority the project’s preliminary annualized damage reduction is roughly $5.5 million and that the planning/design phase is eligible for BRIC/BRIC‑related funding if the city can show sufficient design readiness.
Staff explained the authority’s requested $1.687 million would be used as the local match to pursue federal BRIC/BRIC‑related funding and complete detailed (100%) design, which would improve the city’s competitiveness for future construction funding. The consultants estimated 24–30 months to complete design. Council and authority members asked technical questions about bridge elevations, channel geometry and potential impacts from nearby ODOT bypass work; WSB said bridges at Illinois and Sixth Street are among the critical constrictions while other bridges have variable design constraints.
The authority approved the motion to authorize the application and execution of required documents on a roll‑call vote recorded in the transcript.
Next steps: staff said it will finalize the application materials, coordinate with ASCOG and state reviewers, and return to the authority with updates on the BRIC application and design schedule.
