General

• Region (Map) : ................... Great Plains
• State (Map) ........................ Montana
• County ................................ Yellowstone
• Project: ................................ Huntley
• Dam type: ........................... Earthfill
• Location: ............................ 6 mi SE of Ballantine
• Watercourse: ..................... Offstream Storage
• Reservoir: ........................... Anita
• Construction Date: ............1933-1937
• National ID Number ........... MT00567
• Hydrologic Unit Code .....

Dimensions

• Crest Elevation of Dam: .....................3010.00 ft
• Structural Height of Dam: ..................    42.00 ft
• Crest Length: .......................................1050.00 ft
• Top of Joint Use: .................................          NA
• Top of Active Conservation: ........... 3003.00 ft
• Top of Inactive Conservation: .........           NA
• Spillway Crest: .................................... 3003.00 ft
• Top of Dead Storage: ........................           NA
• Streambed at Dam Axis : ................... 2973.76 ft

Hydraulics

• Normal Water Surface Elev: ...........  .3003.00 ft
• Hydraulic Height: ..................................   30.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    .................................Yes
•    Morning-Glory ............................................ No
•    Crest Length    .......................................... 40 ft
•    Gated      ....................................................... No
•    Capacity at Elev:  3007.8  ft,  ........   15000 cfs
• Auxiliary Spillway ......................................... No
•     Capacity at Elev.   ................................. 0  cfs
• Outlet Works Capacity at
•     Elevation  2980.0 ft  ...........................   50 cfs 

Hydrology

• Drainage Area: ...................................   3.1 sq mi
• Hydrometeorological Report                HMR 55
• Flood Type: ........................ All Season General
• Storm Duration: ......................................... 72 hrs
• Probable Maximum Flood (PMF) Report:
•   Peak Inflow: ...................................... 10,960 cfs
•   Inflow Volume: ............................. 3,165 acre-ft
•   Flow Duration: .................................. 1.25 days
•   PMF Routing MWS Elev.: ................ 3011.4 ft
•   Initial Routing Elev: ........................... 3003.0 ft
•   Study Date: ................................... March 1986