To the memory of Benjamin Davis Wilson, Don Benito, 1811 – 1878, pioneer trapper and settler who came to California in 1841, and in 1864 blazed the trail up this mountain which bears his name. — — Map (db m123037) HM
On this pier in 1926
Albert Abraham Michelson
measured the velocity of light by means of a
beam of light transmitted to
Mount San Antonio
and reflected back to this station. — — Map (db m57274) HM
In 1904, astronomer George Ellery Hale obtained support from the Carnegie Institution of Washington to found the Mount Wilson Solar Observatory. Stellar telescopes were soon added: first the 60-inch, then the 100-inch, when "Solar" was removed . . . — — Map (db m143305) HM
The increased light-grasp of this telescope made possible many notable advances in structural cosmology between 1924 and 1930. They have revised our ideas about the universe in which we live.
One of these advances was that spiral nebulae are . . . — — Map (db m200931) HM
Built in 1900 alongside the West Fork of the San Gabriel River and north of Mt. Wilson, the historic cabin was the first ranger station built in California with federal government funds — $75. In the late 1920's, new roads into the mountains . . . — — Map (db m154560) HM
Los Angeles County
Flood Control District -
Cogswell Dam.
Purpose: Flood control and water conservation.
Type: Rockfill.
Drainage Area: 39.2 square miles.
Storage Capacity: 12,300 acre-feet.
Crest Height: 265 feet. . . . — — Map (db m212989) HM
This was the first National Forest in the State of California, second in the United States. Created by proclamation, December 20, 1892, by President Benjamin Harrison. The first name given to the forest was "San Gabriel Timberland Reserve." It was . . . — — Map (db m143501) HM
Welcome to the Vetter Mountain Fire Lookout Tower in the Angeles National Forest. As you can see from the spectacular vistas, Vetter Mountain is an ideal location for a fire lookout.
The Vetter Mountain Lookout was constructed in 1937 and . . . — — Map (db m201274) HM
Some sections of the original Los Angeles Aqueduct, completed 1913, are still in use. During six years, 100,000 laborers built the 233-mile-long series of canals, pipelines and tunnels that make up the gravity-flow aqueduct from Owens Valley. — — Map (db m129858) HM
The St. Francis Dam, part of the
Los Angeles Aqueduct system,
stood 1½ miles north of this site.
On March 12, 1928, the 185-foot high
concrete dam collapsed just
before midnight, sending 12⅓ billion
gallons of water roaring down . . . — — Map (db m146564) HM
On this site in August of 1924 construction started on the St. Francis Dam, a unit of the Los Angeles Aqueduct. When it was completed in May of 1926, this concrete dam stood 185 feet above the stream bed, impounding a 610 surface-acre lake.
. . . — — Map (db m143721) HM
The 185-foot concrete St. Francis Dam, part of the Los Angeles aqueduct system, stood 1½ miles north of this site. On March 12, 1928, the 185-foot high concrete dam collapsed just before midnight, sending 12½ billion gallons of water roaring down . . . — — Map (db m143722) HM
