Widdows Island

Eucalyptus Island is a small island in the Sacramento–San Joaquin River Delta. It is part of Contra Costa County, California. Its coordinates are 37°51′35″N 121°34′15″W, and the United States Geological Survey measured its elevation as 3 ft (0.91 m) in 1981. It appears on a 1978 USGS map of the area.

Kings Island (formerly Bra's Island) is an island in the Old River in the south Sacramento-San Joaquin River Delta in San Joaquin County, California, 9.3 miles (15 km) southwest of Stockton. The small 8.6-acre (3.5 ha) island is the smallest of a cluster of delta islands including Eucalyptus Island, Widdows Island, Victoria Island, and Coney Island, adjacent to Clifton Court Forebay. At 3 feet (0.91 m) above sea level with the surrounding waters kept a bay by a levee system, the island is accessible only by the one road from the Clifton Court levee or by boat. It appears on a 1978 United States Geological Survey map of the area.

Coney Island is a small island in the San Joaquin River delta, in California. It is part of Contra Costa County, and managed by Reclamation District 2117. Its coordinates are 37.8457598°N 121.5493939°W / 37.8457598; -121.5493939. It appears on a 1978 United States Geological Survey map of the area.

Clifton Court Forebay is a reservoir in the San Joaquin River Delta region of eastern Contra Costa County, California, 17 mi (27 km) southwest of Stockton. The estuary region the forebay is located in is only 1m to 3m above mean sea level.

Salisbury Island (also known as Salsbury Island) is an island in the Old River, in the Sacramento–San Joaquin River Delta. It is named after its original owner, tugboat operator Leslie Salsbury, who purchased it in 1945. It is in Contra Costa County, in northern California. Its coordinates are 37°51′00″N 121°32′13″W.

The John E. Skinner Delta Fish Protective Facility or the Skinner Fish Facility is a fish collection and diversion facility located 2 miles upstream from the Banks Pumping Plant. In operation since 1968 by the California Department of Water Resources, the facility utilizes behavioral devices (fish screens) that divert most fish away from the pumping plant. Fish that make it past the behavior devices are collected into concrete tanks where they are later released back into the Sacramento River or the San Joaquin River.

Hammer Island is a small island in the Sacramento–San Joaquin River Delta, in Contra Costa County, California, originally named Santos Island, it was changed to Hammer Island after Hans Hammer purchased the island from Mr. Santos in 1939. Its coordinates are 37°48′59″N 121°33′25″W,; the United States Geological Survey measured its elevation as 0 ft (0 m) in 1981, and it appears on a 1978 USGS map.

The Victoria Island structure is a 5.5 km (3 mi) bowl-shaped structure buried in the shale sediments of the Sacramento-San Joaquin River Delta, 12 miles (19 km) west of Stockton, California. The circular structure is part of a former sea bed, and lies 1,490–1,600 meters (4,890–4,250 ft) below sea level.Discovered during oil exploration and reported at the Lunar and Planetary Science Conference in Houston, Texas, in March 2007, it is thought to be a buried impact crater formed between 37 and 49 million years ago.Victoria Island, which the structure is named for, is in the San Joaquin River Delta at approximately 37.890°N 121.535°W / 37.890; -121.535. The current publications do not list a more precise location for the impact structure than the island.

Victoria Island is an island in the Sacramento-San Joaquin River Delta, 20 km (12 mi) southwest of Stockton. The 7,200-acre (2,900 ha) island is bounded on the north by North Victoria Canal, on the northeast by Middle River, on the southeast by Victoria Canal, and on the south- and southwest Old River. It is crossed by California State Route 4. It is in San Joaquin County, and managed by Reclamation District 2040. It appears on 1913 and 1952 United States Geological Survey maps of the area.

Discovery Bay is a census-designated place (CDP) in eastern Contra Costa County, California in the United States, about 60 miles (97 km) from San Francisco. It is located in the San Francisco Bay Area. As of 2020, its population was 15,358, a 15% percent gain from 13,352 at the 2010 census.Discovery Bay was originally a waterfront community built on a network of man-made dikes, surrounded by fresh water, except for the southeast quadrant, which comprises the golf course of Discovery Bay Country Club. Some homes have private docks with access to the Sacramento–San Joaquin River Delta. Newer developments have been added on former agricultural land to the west of the initial town-site. Road access is via California State Route 4.

Kellogg Creek is a tributary of Indian Slough, in Contra Costa County, California. Indian Slough itself is a tributary of the Old River, an old channel of the San Joaquin River. Kellogg Creek was formerly named Arroyo Santa Ángela de Fulgino by Pedro Font, on April 4, 1776, as the expedition of Juan Bautista de Anza passed through the area.: 1  In the 19th century it was known to the Californios as Arroyo del Sur.: 399 The mouth of Kellogg Creek lies at an elevation of 7 feet (2.1 meters) at its confluence with Indian Slough in Contra Costa County. Its source is located at 37°47′23″N 121°42′51″W at the head of a canyon in the hills north of Brushy Peak, in the Diablo Range in Alameda County, California. It arises at an elevation of 1,162 feet (354 meters).