Precipitation Estimates for Eastern Washington Stormwater Designs

Current Washington State Department of Transportation (WSDOT) stormwater designs for Eastern Washington rely on precipitation estimates obtained from relatively crude studies done in the 1960s. Inadequate data can lead to over-design and unnecessary construction cost or under-design and damage from overflow. This project will extend the update of precipitation information recently completed for Western Washington to Eastern Washington. The information will also support stormwater analyses that will be required by the DOE stormwater manual for Eastern Washington now under development.