General

• Region (Map) : ................... Great Plains
• State (Map) ........................ Montana
• County ................................ Phillip
• Project: ................................ Milk River
• Dam type: ........................... Earthfill
• Location: .............................19 mi NE of Malta
• Watercourse: ..................... Offstream Storage
• Reservoir: ........................... Nelson
• Construction Date: ........... 1914-1915
• National ID Number ......... MT00574
• Hydrologic Unit Code ....

Dimensions

• Crest Elevation of Dam: ..................   2,228.0 ft
• Structural Height of Dam: ................       28.0 ft
• Crest Length: .................................. 233,000.0 ft
• Top of Joint Use: ............................    2,221.6 ft
• Top of Active Conservation: ........... 2,221.6 ft
• Top of Inactive Conservation: ......... 2,200.0 ft
• Spillway Crest: ...............................              N/A
• Top of Dead Storage: .................        2,200.0 ft
• Streambed at Dam Axis : ................            N/A

Hydraulics

• Normal Water Surface Elev: ............... 2,221.6ft
• Hydraulic Height: ..................................... 20.0 ft
• Service Spillway Type:
•    Uncontrolled  Crest    ................................. No
•    Morning-Glory ............................................ No
•    Crest Length    .......................................... N/A
•    Gated      ....................................................... No
•    Capacity at Elev:                                        N/A
• Auxiliary Spillway ........................................  No
•     Capacity at Elev.   .................................. 0 cfs
• Outlet Works Capacity at

    Elevation  2221.6 ft.,  .........................  800 cfs

Hydrology

• Drainage Area: .................................. 23.6 sq mi
• Hydrometeorological Report               HMR 49
• Flood Type: ..JunePMF w/100-yr Antecedent
• Storm Duration: .................................  72-hours
• Probable Maximum Flood (PMF) Report:

  Peak Inflow: ......................................69,280 cfs

•   Inflow Volume: .......................... 36,070 acre-ft
•   Flow Duration: ................................... 8.5 days
•   PMF Routing MWS Elev.: ............ 2,226.74 ft
•   Initial Routing Elev: ......................... 2,221.6 ft
•   Study Date: ...................................... May 1992