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Tusayan leaders hear drainage master plan update as county, federal partners eye multimillion-dollar mitigation
Summary
Town officials and Coconino County flood-control staff reviewed conceptual watershed and in-town measures to reduce flood risk in Tusayan, noting a $2.4 million planning grant and estimated construction costs of $20 million–$50 million; no final decisions were taken.
Tusayan officials and Coconino County flood-control staff on Tuesday received an update on a drainage master plan that aims to reduce flood risk to the town and key infrastructure, including the wastewater treatment plant and Highway 64.
The workshop presentation, led by county flood-control staff and consulting engineers, summarized Phase 1 conceptual alternatives for both upstream watershed measures in the Kaibab National Forest and in-town stormwater conveyance options. Lucinda Andriani, flood control district administrator for Coconino County, said the county secured roughly $2,400,000 in initial planning funds and that construction costs could range from about $20 million to as much as $50 million.
Why it matters: The town faces large peak discharges in a 100-year storm (modeled at roughly 10,000 cubic feet per second). The team said reducing runoff volume upstream is fundamental to making in-town improvements feasible and to protecting critical facilities such as the wastewater treatment plant.
Chris Dusa, the project manager for Civiltech Engineering, described the three-phase…
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