Agua Mansa, California
|Elevation ||922 ft (281 m)|
|Time zone||Pacific (PST) (UTC-8)|
|• Summer (DST)||PDT (UTC-7)|
|GNIS feature ID||238451|
Agua Mansa ("gentle water") is a former settlement in an unincorporated area of San Bernardino County, California, United States. Now a ghost town, only the cemetery remains, it once was the largest settlement in San Bernardino County. The town was established in 1845 on the Santa Ana River, across from the town of La Placita. Agua Mansa and La Placita were the first non-native settlements in the San Bernardino Valley. Together known as "San Salvador", they were also the largest settlements between New Mexico and Los Angeles in the 1840s.
In 1845, Don Juan Bandini donated parts of his Rancho Jurupa to a group of colonists from Abiquiú, New Mexico on the condition that they would assist in protecting his stock from Indian raids. Ten of these families moved to 2,000 acres (810 ha) on the "Bandini Donation" on the east side of the Santa Ana River, forming the village of La Placita while a second group colonized the west side of the river, forming the town of Agua Mansa. The group that formed Agua Mansa was led by Don Jose Tomas Salajar, and included Cristobal Slover and Louis Rubidoux.
After the adobe church built in La Placita in 1852 collapsed in quicksand, a new church was built in Agua Mansa. Completed in 1853 and dedicated to San Salvador, the church survived through the Great Flood of 1862. The parish, which included Agua Mansa and La Placita, became known as San Salvador de Jurupa, and was the first non-mission parish in Southern California. The chapel's bell now hangs at the Glenwood Mission Inn.
The town prospered for almost 20 years until the 1862 flooding swept away many of the adobe buildings, leaving the area strewn with sand and gravel. Though the town was rebuilt on higher ground, its prosperity did not return. Built in 1870, the Jensen Alvarado Ranch is a California Historical Landmark and is listed on the National Register of Historical Places. Its vineyard produced and sold thousands of gallons of wine each year.
The Agua Mansa valley is located on the south side of Slover Mountain. The valley was 6 mi (9.7 km) in length; its width varied between .5 mi (0.80 km) and .75 mi (1.21 km), the variance depending on the river that flowed through the valley. The area was used as farmland, divided into at least one hundred fields, owned by separate farmers. The valley's lower end included Rubidoux's cottonwood forest, while the upper end was a sandy plain that extended to the borders of San Bernardino.
Pioneer Cemetery Landmark
Agua Mansa is designated California Historical Landmark (No. 121). The marker is located at Agua Mansa Pioneer Cemetery, the only site that remains of the once flourishing town. The first burial occurred in 1852, and the last occurred 111 years later in 1963. Notable pioneers buried at the cemetery include Louis Rubidoux, Cornelius Jensen and Jensen's wife Mercedes Alvarado. In 1955, a descendant of the original Agua Mansa families established "Friends for the Preservation of the Agua Mansa Pioneer Cemetery" and the volunteers of this group refurbished the cemetery, fenced it off and added a gate. In 1967, the cemetery became a branch of the San Bernardino County Museum after its acquisition by San Bernardino County. It has a museum and chapel, and tours are available.
- U.S. Geological Survey Geographic Names Information System: Agua Mansa, California
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