Alarcon discovers the Colorado River and explores
its lower reaches. Cardenas discovers the Grand Canyon.
Father Escalante explores the upper Colorado and its
Lt. J. C. Ives navigates the Colorado River and,
with his steamboat The Explorer, reaches the end of Black Canyon.
Major John Wesley Powell makes the first recorded
trip through the Grand Canyon.
President Theodore Roosevelt signs the Reclamation
Act. Reclamation engineers begin their long series of investigations and reports
on control and use of the Colorado
The Colorado River breaks into the Imperial
Valley, causing extensive damage and creating the Salton Sea.
Unprecedented flood pours down the Gila River into
the Colorado, and flood waters sweep into Yuma Valley.
Arthur P. Davis, Reclamation Director and Chief
Engineer, proposes control of the Colorado by a Dam of unprecedented height in
Boulder Canyon on the Arizona-Nevada border.
All-American Canal Board recommends construction of
the All-American Canal, and a bill is introduced to authorize its
Congress passes Kinkaid Act authorizing Secretary of
the Interior to investigate problems of the Imperial Valley.
Fall-Davis report entitled "Problems of Imperial
Valley and Vicinity", prepared under the Kinkaid Act and submitted to Congress
February 28th, recommends construction of the All-American Canal and a high dam
on the Colorado River at or near Boulder Canyon. Representatives of the seven
Colorado River Basin States sign the Colorado River Compact in Santa Fe, New
Mexico, November 24th. First of the Swing-Johnson bills to authorize a high dam
and canal is introduced in Congress.
Weymouth report expands Fall-Davis report and
further recommends Boulder Canyon project construction
Colorado River Board of California reports favorably
on feasibility of project. Boulder Canyon Project Act, introduced by Senator
Johnson and Representative Swing, passes the Senate December 14th, the House
December 18th, and is signed by President Calvin Coolidge, December 21st.
Six of the seven Basin States approve Colorado River
Compact. Boulder Canyon Project Act declared effective June 25th.
Contracts for the sale of electrical energy to cover
dam and power plant financing are completed.
Bureau of Reclamation opens bids for the
construction of Hoover Dam and Power Plant March 4, awards contract to Six
Companies, March 11th, and gives contractor notice to proceed April 20th.
River is diverted around the dam site, November
14th. Repayment contract for the construction of the All-American Canal is
completed with Imperial Irrigation District.
First concrete is placed June 6th.
All-American Canal construction begins in August.
Repayment contract between the United States and the Coachella Valley Water
District covering cost of Coachella Main Canal executed October 15th.
Dam starts impounding water in Lake Mead February
1st. Last concrete is placed in dam May 29th. President Franklin D. Roosevelt
dedicates dam September 30th.
First generator, N-2, goes into full operation
October 26th. Second generator, N-4, goes into operations November 14th. Third
generator, N-1, starts production December 28th.
Generators N-3 and A-8 begin operation March 22 and
Lake Mead storage reaches 24 million acre-feet, and
lake extends 110 miles upstream. Generators N-5 and N-6 begin operation June 26
and August 31.
Storage in Lake Mead reaches 25 million acre-feet,
more than 8 trillion gallons. Generators A-7 and A-6 begin operations June 19
and September 12th, respectively. With an installed capacity of 704,800
kilowatts, Hoover Powerplant is the largest hydroelectric facility in the world-
a distinction held until surpassed by Grand Coulee Dam in 1949.
Power generation for the year totals 3 billion
kilowatt-hours. All-American Canal placed in operation. Metropolitan Water
District of Southern California successfully tests its Colorado River
Lake Mead elevation reaches 1220.45 feet above sea
level July 30; lake is 580 feet deep, 120 miles long. Spillways are tested
August 6th, the first time they have ever been used. Generator A-1 placed in
service October 9th. Dam closes to Public at 5:30 p.m. December 7th, and traffic
moves over the dam under convoy for duration of World War II.
80th Congress passes legislation officially
designating the Boulder Canyon Project's key structure "Hoover Dam" in honor of
President Herbert Hoover.
The power installation at Hoover Dam is complete
when the final generating unit, N-8, goes on line December 1st. The installed
generating capacity of Hoover Powerplant, including station service units,
reaches 1,334,800 kilowatts.
Hoover Dam celebrates 50th anniversary. Majority of
the cost of the Boulder Canyon project has now been repaid to the Federal
Source - U.S. Department of the Interior - Bureau of Reclamation