South Platte CLOMR Approved by FEMA

WWE’s scientific study of peak discharge hydrology for the South Platte River has modified flood flow peak discharges from Chatfield Dam to Fort Lupton.

The Conditional Letter of Map Revision (CLOMR) for the hydrology of the South Platte River was approved by the Federal Emergency Management Agency (FEMA) in June.  WWE has been working on this project with the Urban Drainage and Flood Control District (UDFCD) and local governments for the past year.

Dr. Andrew Earles, Shannon Tillack and Julia Traylor were the lead engineers for WWE on this assignment.  Our team created updated peak discharge profiles based on stream gage data for the South Platte River and its tributaries.

UDFCD is now working with Olsson Associates to update floodplain mapping based on this new, approved hydrology.   Andrew would like to thank Ken MacKenzie, David Bennetts, David Mallory and others at UDFCD for their technical input and guidance on this project.

Photo by David Mallory