EWEB requested a dam breach analysis and inundation mapping for Carmen Dam in support of FERC Part 12 relicensing requirements. A notable challenge was the presence of significant Infiltration areas to porous subsurface terrain and their effect on the breach flood hydrograph.
Kleinschmidt performed a dam breach analysis for sunny days and PMF flood conditions at Carmen Dam. A 2D HEC-RAS model was constructed to simulate the flood wave from the breach of Carmen Dam to Trail Bridge Reservoir. Inundation mapping was provided, showing the maximum extent of the flood inundation and breach flood wave timing through the routing reach.
Kleinschmidt provided a 2D HEC-RAS Dam Breach model of Carmen Reservoir, Carmen Dam, and the downstream routing reach to Trail Bridge Reservoir. We completed the project on time and within budget and solved a difficult challenge in modeling flows over the porous sub-surface terrain and a waterfall partway down the routing reach. We concluded the project with a hydraulics report and inundation mapping for the sunny day and PMF flood breaches.
Regional Vice President
Paul Larson, P.E.
Paul Larson has 28 years of hydropower and infrastructure experience and is Kleinschmidt’s Northwest Regional Vice President. and specializes in the management of technical teams relative to engineering and utility operations. Paul has managed cross-disciplinary teams on a wide range of hydropower generation, transmission, and distribution projects and other projects for clients in the Northwest....