Tiber Dike
Dam in Liberty County, Montana · Marias River Offstream · forms Tiber Reservoir
Height
65 ft
20 m (NID height)
Length
16,650 ft
5,075 m
Completed
1956
Tiber Reservoir today
2,987.00 ft
7 days ▼ 0.22 ft
vs full pool
▼ 6.00 ft
Normal storage
967,320 acre-ft
Above normal for the date
Reservoir level measured Oct 23, 2026, 9:00 AM MDT. Full level page →
Facts
- Purposes
- –
- Dam type
- Earth
- Structural height
- 65 ft
- Owner
- BUREAU OF RECLAMATION (Federal)
- Maximum storage
- 1,424,478 acre-ft
- Surface area
- 23,805 acres
- Hydraulic height
- 51 ft
- Drainage area
- 4,393 sq mi
- Spillway
- None
- Army Corps district
- Omaha District
- Also known as
- Lake Elwell
- NID ID
- MT00579S001
Facts from the U.S. Army Corps of Engineers National Inventory of Dams, record updated Oct 22, 2025. Search NID ID MT00579S001 at nid.sec.usace.army.mil. Project website.
Other dams at Tiber Reservoir
- Tiber Dam