Review Lyons' current floodplain map, adopted by FEMA in 2012.
Boulder County Unincorporated Draft Floodplain Mapping
Boulder County has prepared draft floodplain maps for unincorporated Boulder County. State and county staff held a review session for the proposed draft maps on Dec. 13, which included a presentation and a hands-on map review session. Boulder County's draft floodplain maps and feedback submission can be found here.
This plan updates a previous plan completed in April 1998. In addition to the basic updates of that plan, this plan modernizes the techniques used for runoff determination at various storm events, introduces concepts of updated codes and standards, water quality treatment of runoff, areas at risk for flooding or inundation during various runoff events, and other important elements of a stormwater master plan.