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The first private rancho along the Santa Ana River was Rancho Santiago de Santa Ana, a 62,500-acre (253 km 2) rancho on the left bank of the lower Santa Ana River. This rancho was acquired by Don Juan Pablo Grijalva as early as 1801. [ 54 ]
State Route 73 (SR 73) is an approximately 17.76-mile (28.58 km) [1] state highway in Orange County, California. The southernmost 12 miles (19.31 km) of the highway is a toll road operated by the San Joaquin Hills Transportation Corridor Agency named the San Joaquin Hills Transportation Corridor , which opened in November 1996.
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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.
This table only addresses the portion signed as a California State Route in these cases. Lengths for each state route were initially measured as they existed during the 1964 state highway renumbering (or during the year the route was established, if after 1964), and do not necessarily reflect the current mileage.
Its primary purpose is flood control and it is the downstream element of the Santa Ana River's flood control system, which is a natural constriction about 30.5 mi (49.1 km) upstream from the ocean. The area upstream from the dam contains 2,255 sq mi (5,840 km 2 ) of the watershed's 2,650 sq mi (6,900 km 2 ).
The trail stretches 30 miles (48 km) from the Pacific Ocean at Huntington Beach along the Santa Ana River to the Orange–Riverside county line. [1] [2] Planned extensions of the trail reach to Big Bear Lake in San Bernardino County. When completed, it will be the longest multi-use trail in Southern California, at approximately 100 miles (160 ...
Mill Creek is a 17.8-mile-long (28.6 km) [3] stream, originating in the San Bernardino Mountains, in San Bernardino County, California. It is a major tributary of the Santa Ana River. Their confluence occurs just downstream of the upper Santa Ana Canyon mouth.