Twelve Mile Creek Watershed Site M-1 Dam Quick Facts
Twelve Mile Creek Watershed Site M-1 Dam Map
Twelve Mile Creek Watershed Site M-1 Dam Information
Twelve Mile Creek Watershed Site M-1 Dam is an earthen embankment dam located about 4 miles from Afton, Union, Iowa.
The dam, which is on the Twelve Mile Creek River, was primarily built for Flood Risk Reduction purposes, but also serves for Recreation and Water Supply benefits.
The dam was designed by HOSKINS WESTERN SONDEREGGER INC;Hoskins – Western – Sonderegger, Inc. and commissioned in 1983 and is currently owned by Creston Waterworks.
Twelve Mile Creek Watershed Site M-1 Dam Structure
The Twelve Mile Creek Watershed Site M-1 Dam is approximately 2,100 feet (640 m) long, 66 feet (20 m) high and has a structural volume of 670,000 cubic yards (512,252 cubic metres).
Twelve Mile Creek Watershed Site M-1 Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 10,200 acre-ft (12,581 Ml) and maximum capacity of 27,200 acre-ft (33,551 Ml).
The surface area of the reservoir is 633 acres (256 ha) and the total catchment area is 23 square miles (60 square kilometres).
Twelve Mile Creek Watershed Site M-1 Dam Spillway
The dam has a 4 feet (1 m) wide uncontrolled spillway with a maximum discharge capacity of 0 cubic feet per second (0 cubic metres per second).
Twelve Mile Creek Watershed Site M-1 Dam Compared to Five Famous American Dams
Twelve Mile Creek Watershed Site M-1 Dam Weather
Current Conditions at Twelve Mile Creek Watershed Site M-1 Dam
Failed to fetch current weather data.7-Day Forecast for Twelve Mile Creek Watershed Site M-1 Dam
Failed to fetch weather forecast data.Twelve Mile Creek Watershed Site M-1 Dam Frequently Asked Questions
Twelve Mile Creek Watershed Site M-1 Dam is in Iowa.
Twelve Mile Creek Watershed Site M-1 Dam is in Union County.
Twelve Mile Creek Watershed Site M-1 Dam is 66 feet high.
Twelve Mile Creek Watershed Site M-1 Dam is 2,100 feet long.
More Dams in Union County:
Bayou Darbonne Dam + ReservoirClayton Dam
Green Valley Lake Dam
Lake Calion Dam
Lock and Dam No 8
Nottely Dam
Pilcher Creek Dam
River View Slurry Lake 02i Dam
River View West Slurry Lake Dam
Slurry Lake Iv Dam
Thief Valley Dam
Three Mile Reservoir Dam
Tramperos Creek Site 1 Dam
Twelve Mile Creek Watershed Site M-1 Dam
Whitewater St. Park Lake Dam
Wolf Creek Dam
More Dams in Iowa:
Badger Creek Watershed Site M-1-A DamBig Creek Diversion Dam
Big Creek Terminal Dam
Big Hollow Dam
Brushy Creek Dam
Cedar Rapids Milldam (5 In 1)
Coralville Dam
Desoto Dam
Easter Lake Dam
Geode Lake Dam
Green Valley Lake Dam
Lake Belva Deer Dam
Lake Darling Dam
Lake Delhi Dam
Lake Icaria Dam (Site M-1-A Walters Cr)
Lake Macbride Dam
Lake Panorama Dam
Lake Ponderosa Dam
Lake Sugema Dam
Lake Sundown Dam
Lake Wapello Dam
Little River Watershed Site 65 Dam
Little River Watershed Site M-1 Dam
Lost Grove Lake Dam
Maffitt Reservoir Dam
Mississippi River Lock and Dam 10
Nashua Milldam
Pleasant Creek Lake Dam
Prairie Rose Lake Dam
Red Rock Dam
Roberts Creek Dam
Rock Creek Dam
Saylorville Dam
Sun Valley Lake Dam
Three Mile Reservoir Dam
Twelve Mile Creek Watershed Site M-1 Dam
Virden Creek Dam
Wayne Co. Roadgrade Dam 21-67-22
West Lake Dam
Condition Assessment Classification
Satisfactory
No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor
A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
High
Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner’s property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Source: National Inventory of Dams