.jpg) Sherman Island from the air. The bridge at bottom connects it to Antioch. The small D-shaped island at the top right isDecker Island. | |
  Sherman Island  Sherman Island  Sherman Island | |
| Geography | |
|---|---|
| Location | Sacramento–San Joaquin River Delta |
| Coordinates | 38°03′34″N121°44′00″W / 38.0593642°N 121.7332878°W /38.0593642; -121.7332878 |
| Adjacent to | Sacramento-San Joaquin River Delta |
| Area | 14,000 acres (5,700 ha) |
| Length | 9.5 mi (15.3 km) measured SW–NE |
| Width | 3.0 mi (4.8 km) measured SE–NW |
| Demographics | |
| Population | 233 (2000)[1] |
| Additional information | |
| Official website | www |
Sherman Island is anisland in theSacramento-San Joaquin River Delta at the confluence of the two rivers inSacramento County, California, 1.2 miles (1.9 km) northeast ofAntioch. The 5,500 ha (14,000 acres) island, mostly managed byReclamation District 341,[2] is the meeting point ofSacramento,Solano, andContra Costa Counties, and is bordered on the north and northwest by theSacramento River, on the northeast by Three Mile Slough, and on the east, and south west by theSan Joaquin River. Sherman Island is a widely known kite and windsurfing area.
Sherman Island was shown, in the same location but with a different shape, on an 1850 survey map of theSan Francisco Bay area made byCadwalader Ringgold[3] and an 1854 map of the area byHenry Lange.[4] Currently, it is 10 feetbelow sea level, due to the drainage ofwetlands in the Delta which has dried out itspeat soils, resulting inland subsidence. "In ... parts of Sherman Island, the land has now subsided 25 feet since the late 1800s—and continues to sink between half an inch and 1.5 inches yearly." It is possible that simultaneouslevee failures on Sherman Island and surrounding islands, occurring in the wake of anearthquake, could threaten the fresh water supply for theCentral Valley.[5]
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Access to the island is provided by boat and fromCalifornia State Route 160, which uses theAntioch Bridge to link Sherman Island with the city of Antioch to the south, and the Three Mile Slough Bridge to link Sherman Island withBrannan Island State Recreation Area to the north. In either case, turn south onto Sherman Island Road and continue driving to Mayberry Slough.[6]
The southwest of the island, known as Lower Sherman Island Wildlife Area, contains about 3,100 acres (1,300 ha) and features a largemarshy area and Sherman Lake where there is fish[a] and other water sports, particularlywindsurfing andkiteboarding.[7] This area was designated in 1976 as a wildlife habitat by theCalifornia Fish & Game Commission. The Delta Flood Protection Act, enacted after serious flooding occurred in 1986, includedflood control improvement projects for Sherman Island, as well as eight other islands. Senate Bill 1065, enacted in 1991, was intended to assure that these islands did not experience any net loss of habitat.[6]
In 2019, park hours were established as sunrise to sunset year-round. Self-payment is required when no fee collector is present.[8]
Overnight camping is allowed with the following restrictions:
Media related toSherman Island (California) at Wikimedia CommonsMap: Islands ofSuisun Bay and theSacramento–San Joaquin River Delta | |
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