Appellants press for groundwater study as engineer says stormwater model meets county code At a San Juan County hearing on OPALCO’s Decatur Island solar project, the applicant’s engineer testified that stormwater modeling (including PV‑SMART inputs and the Western Washington hydrology model) shows no increased off‑site runoff; appellants urged additional subsurface/groundwater study, citing topography and test‑pit evidence of perched groundwater.

At a contentious San Juan County hearing, concerns over potential groundwater interflow threaten to overshadow the solar project’s compliance with stormwater regulations.

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Coconino County staff recommend adopting larger local floodplain after August 2023 floods County and district consultants presented FEMA-quality hydrology and hydraulic modeling showing a substantially larger floodplain near Tusayan than existing FEMA Zone A maps indicate. Staff proposed rewriting local floodplain rules so the "regulatory floodplain" includes both FEMA special flood hazard areas and the newly modeled local floodplain, a

Coconino County is taking crucial steps to redefine flood risks, revealing that the current FEMA maps underestimate the real dangers after August's heavy rains.

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