Summary
Built in 1962 by the USDA NRCS, this private dam stretches 476 feet in length and reaches a height of 35 feet, holding a storage capacity of 64 acre-feet. Despite its low hazard potential, the dam remains state-regulated and subject to inspection, permitting, and enforcement by the Iowa DNR.
With a surface area of 2.8 acres and a drainage area of 0.44 square miles, Williams Dam plays a crucial role in water resource management in the region. Its uncontrolled spillway design and soil foundation create a moderate risk profile, prompting the need for consistent monitoring and risk management measures. While the dam's condition remains unrated, its last inspection dates back to 1994, indicating the importance of regular assessments to ensure its structural integrity and functionality for the surrounding community.
As climate change continues to impact precipitation patterns and water availability, dams like Williams Dam play a significant role in safeguarding water resources and mitigating potential risks. With its strategic location and purposeful design, this earth dam serves as a testament to the collaborative efforts of federal and state agencies in ensuring the safety and sustainability of water infrastructure in the face of evolving environmental challenges.
Year Completed |
1962 |
Dam Length |
476 |
Dam Height |
35 |
River Or Stream |
TR-BROKEN KETTLE CREEK |
Primary Dam Type |
Earth |
Surface Area |
2.8 |
Drainage Area |
0.44 |
Nid Storage |
64 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
35 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Perry Creek Near Milnerville
|
25cfs |
Floyd River At James
|
187cfs |
Missouri River At Sioux City
|
15400cfs |
Big Sioux River At Akron
|
816cfs |
Omaha Cr At Homer
|
45cfs |
Vermillion River Nr Vermillion Sd
|
33cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo 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
HighDams 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.
Williams Dam
220th Street Plymouth County