Clarence Cannon Dam is a 138 feet (42 m) high and 1,940 feet (590 m) long combination concrete gravity embankment dam. The dam contains 450,000 cubic yards (340,000 m3) of concrete and 3,000,000 cubic yards (2,300,000 m3) of earth-fill. The dam contains a hydroelectric power plant, with two generators, capable of producing up to 58 megawatts (78,000 hp) of power, or enough to supply a town of 20,000 people. When both units are operating at capacity, as much as 5,400,000 US gallons (20,000,000 l; 4,500,000 imp gal) of water pass through the turbines each minute.

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Latest News Releases

Army Corps of Engineers reminds visitors to practice water safety
5/8/2023
As millions of Americans plan visits to our nation’s lakes and rivers, the U.S. Army Corps of Engineers reminds visitors of the importance of practicing safe, sensible, and thoughtful activities in,...
Public Meeting – Salt River Re-Regulation Dam/Lake Sturgeon Releases
4/14/2023 UPDATED
April 14, 2023, Mark Twain Lake – The U.S. Army Corps of Engineers at Mark Twain Lake invites everyone to the M.W. Boudreaux Memorial Visitor Center on April 20, 2023, at 6:00 pm for a public meeting...
New Guardrail Systems on Mark Twain Lake Boat Ramps
9/27/2022
September 27, 2022, Mark Twain Lake – The U.S. Army Corps of Engineers at Mark Twain Lake is announcing the temporary closure of four boat ramps to improve visitor safety. The South Fork, Indian...
Corps Extends Camping Season for Some Sites at Mark Twain Lake
9/25/2022
September 25, 2022, Mark Twain Lake – The U.S. Army Corps of Engineers (USACE) at Mark Twain Lake has announced an extension of the camping season for some sites due to increased public demand. To...
Tickets Required for Indian Creek Halloween Walk 2022
9/19/2022
September 19, 2022, Mark Twain Lake – The U.S. Army Corps of Engineers at Mark Twain Lake is announcing that the Indian Creek Halloween Walk admittance will be by advance tickets only. Tickets are...
Two St. Louis District lakes awarded fish habitat improvement grants
6/21/2022
U.S. Army Corps of Engineers, St. Louis District’s Lake Shelbyville and Mark Twain Lake were recently awarded the National Fish Habitat Partnership Bass Pro Shops U.S. Open Grant to improve fish...
Reservations for the Annual Halloween Walk
5/10/2022
News Release 22-19, Mark Twain Lake May 10, 2022 – The U.S. Army Corps of Engineers at Mark Twain Lake is excited to announce the annual Halloween Walk will be held Friday, October 21 and Saturday,...
Temporary Closure of Robert Allen
3/18/2022
Mark Twain Lake, March 18, 2022 – The U. S. Army Corps of Engineers announces that the Robert Allen Recreation Area will be closed to public use beginning March 21, 2022 through April 4, 2022. The...

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Contact

Mailing Address:
U.S. Army Corps of Engineers
Clarence Cannon Dam & Mark Twain Lake
20642 Hwy J
Monroe City, MO 63456

Telephone:
Project Office: (573) 735-4097
Fax: (573) 735-2750

Email:
marktwaininfo@usace.army.mil

Office Hours:
Weekdays - 8:00 A.M. - 4:00 P.M. 

Camping Reservations:
1-877-444-6777 or visit https://www.recreation.gov/


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