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Coconino County, Town of Tusayan outline multi‑phase plan to reduce flood risk around Grand Canyon gateway
Summary
County and Tusayan officials presented a drainage master plan that combines watershed basins on Forest Service land with in‑town storm infrastructure; officials plan federal grant applications and next‑phase geotechnical work to move the concept into design and construction.
Coconino County flood‑control staff and town officials presented a multidiscipline drainage master plan on Tuesday that pairs large detention basins upstream on Coconino Wash with in‑town storm‑drain and channel improvements in Tusayan to reduce the community’s exposure to high‑volume floods.
The plan lays out a staged approach: upstream flood‑retarding basins on National Forest lands (including a large basin at Tusayan Pines and a second at the Echo Draw/10x meadow) to capture and attenuate runoff, plus in‑town conveyance upgrades (dual large pipes and a reconstructed channel) designed to meet Arizona Department of Transportation standards for Highway 64 and to protect the town’s wastewater treatment plant from a 100‑year event. "We've reached a consensus as to the preferred alignment of the flood mitigation both through town as well as the measures proposed upstream of town on Forest," Flood Control Director Lucinda Andriani told the board.
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