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Santa Ana's location within the Orange County watershed. Santa Ana is nested on flat, low-lying plains with little land elevation change. Running through the west end of the city is the mostly channelized Santa Ana River, which is also largely seasonal due to the construction of the Prado Dam and Seven Oaks Dam. The river caused several severe ...
This valley was named Vallejo de Santa Ana in 1769 after the Gaspar de Portolà expedition, of which Friar Junípero Serra was a part, as well as Sargeant José Antonio Yorba, and José Manuel Nieto. The mission located closest to the Santa Ana Valley is Mission San Juan Capistrano , which was built east of the San Joaquin Hills , in the ...
Santa Ana water resource basin (HUC 180702) is one of three hydrologic basins within the Southern California Coastal water resource subregion and is one of approximately 2,200 water resource basins in the United States hydrologic unit system. The Santa Ana water resource basin is a third-level subdivision of the United States hydrologic unit ...
OC Streetcar, formerly known as the Santa Ana/Garden Grove Fixed Guideway Project, is a streetcar line connecting Downtown Santa Ana to the Depot at Santa Ana which is currently under construction and expected to open in 2023. [226] OCTA has also proposed connecting the two systems via Harbor Boulevard and the West Santa Ana Branch corridor.
North Tustin [4] is an unincorporated community and census designated place (CDP) in Orange County, California. The population was 25,718 at the 2020 census , up from 24,917 in 2010. For statistical purposes, the United States Census Bureau has defined North Tustin as a census-designated place (CDP).
This segment of the Santa Ana River just downstream of Seven Oaks Dam marks the beginning of the inland riparian zone. Historically, the Santa Ana was named "the best stream in Southern California [for steelhead trout habitat]". [40] The steelhead is an anadromous fish, similar to salmon, that migrates up rivers and streams to spawn. Unlike ...
The Santa Ana Mountains, where the creek originates, began to rise about 5.5 million years ago along the Elsinore Fault. [31] Most of the Aliso Creek watershed sits on several layers of marine sedimentary strata , the oldest dating from the Eocene (55.8–33.9 MYA) and the most recent, the Pliocene (5.33–2.59 MYA). [ 32 ]
The Santa Anas include a number of high-mountain streams that flow for all or most of the year, although once out of the foothills these waterways are ephemeral.The major streams rising from the western side of the range drain into the Pacific Ocean; these include Peters Canyon Wash, Serrano Creek, San Diego Creek, Aliso Creek, Trabuco Creek, San Juan Creek, and San Mateo Creek.