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The dominant geological feature in the Santiago Creek watershed are the Santa Ana Mountains. The northern portion of the mountains, which Santiago Creek drains, is composed of rocks from the pre-Triassic to the Quaternary (251–2.6 MYA). [8] These rocks consist primarily of slate, sandstone, conglomerate, limestone, and other sedimentary rocks ...
The dam and reservoir receive water from a catchment area totaling 64 square miles (170 km 2), controlling water from about two-thirds of the Santiago Creek watershed. Santiago Dam is designed to contain up to a 50-year flood and withstand a 500-year flood of over 30,000 cubic feet per second (850 m 3 /s). Aside from Santiago Creek, Limestone ...
Santiago Creek. The Santa Ana River in the U.S. state of California has over 20 significant tributaries and there are over 50 significant streams in the watershed.
Map showing the main Orange County watersheds and watercourses. This is a list of rivers of Orange County, California, part of the Greater Los Angeles Area in Southern California.The Santa Ana River and San Gabriel River are the largest in Orange County; their extensive watersheds extend into neighboring Los Angeles, Riverside and San Bernardino Counties.
In fact, the river flooded again in 1969, and while much of the runoff from the Inland Empire was captured behind Prado Dam—probably saving Orange County from an even greater flood—Santiago Creek, a large tributary flowing from the Santa Ana Mountains, eroded its banks until it swept away portions of residential communities in the cities of ...
Arroyo Trabuco's headwaters are actually not physically far from that of Bell Canyon and San Juan Creek, the first of which is the second longest tributary of San Juan Creek. On the west of the Arroyo Trabuco watershed is the Aliso Creek drainage basin, on the north the Santiago Creek, and on the northeast streams draining into the Lake ...
The small stream it is associated with, Silverado Creek, rises on the north slope of Modjeska Peak at the elevation of 3,980 feet (1,210 m) and flows north and west, past the town of Silverado to join Santiago Creek at 942 feet (287 m) [1] after a journey of just under 5 miles (8.0 km). The main branch, Ladd Canyon, is just over 3 miles (4.8 km ...
The San Diego Creek drains a roughly rectangular shaped watershed of 112.2 square miles (291 km 2) in central Orange County.Although most of the watershed is located in Irvine, it also includes parts of the incorporated cities of Aliso Viejo, Laguna Hills, Laguna Woods, Lake Forest, Orange, Santa Ana, and Tustin.