Mountain Park Dam

The foundation of Mountain Park Dam consists of Cambrian  granite which has been intruded by diabase. The granite is hard,  fine to medium rystalline, pink to grayish pink, and weathered to a  depth of about 2 inches along joints near the surface. It is intricately  cut by joints, shear, and faults.

The canyon in which the dam is constructed is fault and joint controlled.  A fault zone approximately 62 feet wide is present in the canyon floor  and lies beneath the central portion of the dam. This zone is characterized  by sheared, pulverized, granular, slickensided diabase with some granite  between the diabase intrusions. The granite in this zone is hard to  soft and easily broken. The zone, known as the plug area, was over  excavated to a depth of 25 feet, backfilled with concrete, and then  grouted. Other areas of soft rock in the abutments and foundation  area were also over excavated to a minimum depth of 5 feet, then backfilled  with concrete. The foundation area and abutments were grouted before  placing concrete.

RegionFacilities in Great Plains | Great Plains Home Page
ProjectMountain Park
Dam Type
ReservoirTom Steed
WatercourseWest Otter Creek
Original Construction1973-1975
Modified Construction
National ID NumberOK20502
Hydrologic Unit Code

Structural Height133.0 ft
Hydraulic Height (Normal Operating Depth at Dam)59.0 ft
Top Parapet (Elevation)1427.0 ft
Spillway Crest Elevation
Crest Elevation1423.0 ft
Crest Length535.0 ft
Crest Width6.0 ft
Base Width17.0 ft
Volume of Dam Construction Materials18160.0 cu yd
Streambed at Dam Axis
Top of Exclusive Flood Control Pool (Elevation)
Top of Joint Use Pool (Elevation)
Top of Active Conservation Pool (Elevation)
Top of Inactive Conservation Pool (Elevation)
Top of Dead Storage Pool (Elevation)

Hydraulics & Hydrology
Total Water Storage at Elevation117825 acre-ft at 1414
Maximum Water Surface Elevation1427.0 ft
Normal Water Surface Elevation
Spillway Type
Auxiliary Spillway
Spillway Capacity at Elevation38300 cfs at 1423.6
Auxiliary Spillway Capacity at Elevation
Uncontrolled Spillway Capacity at Elevation
Outlet Works Capacity at Elevation44 cfs at 1414 ft
Diversion Capacity at Elevation
Drainage Area121 sq mi
Hydrometeorological Report (HMR)HMR 51 & 52
Probable Maximum Flood (PMF) Report1988 General Storm

Contact Information
TitleArea Office Manager
OrganizationOklahoma-Texas Area Office
Address5316 HWY 290 W, Suite 510
CityAustin, TX 78735-8931
Phone (Office)512 899-4150
Phone (FAX)512 899-4179
OrganizationMountain Park Master Conservancy District
AddressRoute 1, PO Box 57
CityMountain Park, OK 73559
Phone (Office)580 569-2742

Last updated: Apr 02, 2013