Marsh Creek (California)
| Marsh Creek | |
| Arroyo De Los Poblanos | |
| stream | |
 Marsh Creek Reservoir, Courtesy John Marsh Trust, October 9, 2014
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|
| Country | United States |
|---|---|
| State | California |
| Region | Contra Costa County |
| Tributaries | |
| - left | Briones Creek, Dry Creek, Deer Creek, Sand Creek |
| - right | Sycamore Creek, Kellogg Creek |
| Source | Eastern Mount Diablo in Morgan Territory Regional Preserve |
| - location | 12 mi (19 km) SSE of Clayton, California |
| - elevation | 2,360 ft (719 m) |
| - coordinates | 37°48′43″N 121°48′06″W / 37.81194°N 121.80167°W |
| Mouth | |
| - location | Sacramento–San Joaquin River Delta at Oakley, California |
| - elevation | 0 ft (0 m) |
| - coordinates | 38°00′52″N 121°41′04″W / 38.01444°N 121.68444°WCoordinates: 38°00′52″N 121°41′04″W / 38.01444°N 121.68444°W |
Marsh Creek is a stream in east Contra Costa County, California in Northern California which rises on the eastern side of Mount Diablo and flows 30 miles (48 km) to the Sacramento–San Joaquin River Delta at Oakley, California, near Big Break Regional Shoreline. The creek flows through Marsh Creek State Park (California), where water is impounded to form Marsh Creek Reservoir, then through the city of Brentwood, California.
The creek bears the name of notable California pioneer John Marsh who built his home on the creek in 1838 after acquiring the Rancho Los Meganos Mexican land grant from Jose Noriega on the western edge of the town of Brentwood and just to the east of what is now Clayton, California. Marsh Creek was originally named Arroyo De Los Poblanos.
The Marsh Creek watershed drains about 100 square miles of the eastern slopes of Mt. Diablo and the neighboring portions of the Black Hills. Its upper tributaries are intermittent and small perennial streams which flow northwesterly until the creek turns east at Marsh Creek Springs. The creek was dammed downstream from the Springs in the 1960s, forming Marsh Creek Reservoir. The dam is south of Brentwood and north of the intersection of Marsh Creek Road and Camino Diablo Road. Major tributaries are Briones, Dry, Deer and Sand Creeks. Briones Creek, which drains the undeveloped Briones Valley, flows into Marsh Creek at Marsh Creek Reservoir, which lies in Marsh Creek State Park (California). Dry, Deer, and Sand creeks all flow into Marsh Creek within the city limits of Brentwood. The creek is largely channelized in the lower watershed, and includes a drop structure near the city of Brentwood that appears to be a complete passage barrier. The lower stretch of the creek includes 11 miles (18 km) from the outfall of the Marsh Creek Reservoir into the western Delta at the Big Break Regional Shoreline area of the Sacramento-San Joaquin River Delta northeast of the city of Oakley.
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Wikipedia