Tiber Dam
Tiber Dam, located in southern Liberty County in northern Montana, USA, is a dam on the Marias River which forms Lake Elwell, also known as Tiber Reservoir. Construction on the dam began in 1952 and it was complete in 1956. Between 1967 and 1969, a dyke was added to the southern rim of the reservoir near the dam due to difficulties with the spillway settling. From 1976 to 1989, the spillway was rehabilitated. The dam is also considered one of the biggest earth-fill dams in the world, along with Fort Peck Dam.

The dam is an earth-fill type with a length of and height of . The dyke is long and tall. The dam's main spillway is controlled by three gates and has a maximum discharge of . The dam's auxiliary spillway can release up to and the outlet works .
Q496568
Liberty County
LOC
Q1212
Montana
LOC
Q12323
dam
Concept
Q595366
Marias River
LOC
Q6475743
Lake Elwell
LOC
Q911379
spillway
Concept
Q1426242
Fort Peck Dam
LOC
Q911379
spillway
Concept
Q1550436
outlet works
UNK
Q7800349
Tiber Dam
LOC
1952-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1952
DATE
1956-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1956
DATE
1967-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1967
DATE
1969-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1969
DATE
1976-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1976
DATE
1989-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1989
DATE
located in the administrative territorial entity
located on terrain feature
reservoir created
located in the administrative territorial entity
located in the administrative territorial entity
located in the administrative territorial entity
inflows
dam