Water Elevation Gauges
Walnut Creek @ Ygnacio Valley Road
The Walnut Creek Stream Gauge was installed during the summer of 2008 and, at this time, only measures the stage (water elevation) in Walnut Creek. The gauge is located upstream of Ygnacio Valley Road and upstream of a private parking lot that is constructed over the concrete channel. A rating curve (depth vs flow graph) will be developed over time. The gauge will be used to evaluate models used to determine design flows for flood control projects. If the gauge is in place for many years, it can be used to establish flow frequency curves for predication of design flows.
Marsh Creek Reservoir Elevation Information
Marsh Creek Dam is located in East Contra Costa County, south of the City of Brentwood and north of the intersection of Marsh Creek Road and Camino Diablo.
The following elevations are based on as-built information for Marsh Creek Reservoir:
203.5 feet — Top of Dam
200.0 feet — Top of Emergency Spillway Erosion Protection
191.8 feet — Emergency Spillway Crest
168.0 feet — Primary Spillway Crest
Below 168.0 feet the water level recedes by evaporation and infiltration
Marsh Creek @ Marsh Creek Fire
Installed in January 19, 2010 this stream gauge currently provides depth of flow at its location. The gauge is located near the entrance road for the Sheriff’s Marsh Creek Detention Facility off of Marsh Creek Road east of Clayton. A rating curve (depth vs flow graph) will be developed over time. The gauge will be used to evaluate models used to determine design flows for flood control projects. If the gauge is in place for many years, it can be used to establish flow frequency curves for predication of design flows.
Marsh Creek @ Brentwood
The USGS decommissioned this gauge in 2014. The Hydrology Section soon after took over the gauge house and installed a bubbler gauge. The Flood Control District will continue to monitor the stage in Marsh Creek @ Brentwood. As budget allows, the Flood Control District will continue to update the rating curve which translates the stage to a flow rate.
More of our stream gauges
We have several other new stream gauges. We will be adding them to this page with detail in the future. Until then, you can find the stream gauges by going to our RainMap, choosing "Datasets > Water Level". The map will show the locations of all of our stream gauges and their current level. Clicking on stream gauge point will open a small window with a plot and links to the data and gauges information on CDEC.