Los Angeles County Department of Public Works Eaton Dam Spillway Analysis

The Los Angeles County Department of Public Works (LACDPW) proposed to construct an access ramp from the Eaton Dam Spillway into the Eaton Canyon Wash. The proposed ramp would modify the system in a way that could possibly alter energy dissipation and channel response. In light of this potential issue, the US Army Corps of Engineers (USACE) required an impact analysis of the proposed modifications’ interface based on the proposed design.

CWE performed the impact analysis using the Advanced Hydraulics (AdH) model to evaluate existing and proposed conditions and determine the most critical combination of flows at the confluence of the channel and spillway.