General

• Vicinity Map
• Region (Map) ....................... Great Plains
• State (Map) ............................... Montana
• County ........................................... Glacier
• Project ..................................... Milk River
• Dam type .................................. Diversion
• Location ................. 2 mi SE of Babb, MT
• Watercourse .................... St. Mary River
• Original Construction ..................... 1915
• National ID Number ................ MT82932
• Hydrologic Unit Code ........................  

Dimensions

• Crest Elevation ............................. 4471.0 ft
• Weir Crest Elevation .................... 4457.5 ft
• Structural Height ................................... 6 ft
• Hydraulic Height ................................... 6 ft
• Weir Crest Length .......................... 189.7 ft
• Total Crest Length ......................... 359.1 ft
• Crest Width ........................................... NA
• Base Width ............................................ NA
• Volume ............................................ 1,200 cy

Hydraulics

• Spillway capacity at
•   El. 4468.0 ................................. 20,000 cfs
• Diversion capacity ....................... 850 cfs

Headworks

• St. Mary Canal:  Eight 5- by 5.5-foot headgates.