Rockford Dam Reservoir Report
Last Updated: December 13, 2025
Rockford Dam, located in Floyd County, Iowa, is a gravity dam on the Shell Rock River with a primary purpose of recreation.
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Summary
Completed in 1860, this historic structure stands at a height of 8 feet and a length of 170 feet, providing a storage capacity of 153 acre-feet and a surface area of 40 acres. The dam is state-regulated by the Iowa Department of Natural Resources, ensuring regular inspections and enforcement to maintain its satisfactory condition and low hazard potential.
Despite its age, Rockford Dam continues to serve as a popular recreational spot for locals and visitors alike, offering opportunities for fishing, boating, and other water-related activities. Its uncontrolled spillway and sandy soil foundation contribute to its unique characteristics, while its moderate risk assessment of 3 reflects the ongoing efforts to manage potential hazards. With a designated emergency action plan and a history of meeting safety guidelines, Rockford Dam remains a valued asset in the conservation and enjoyment of water resources in the area.
As part of the Rock Island District, Rockford Dam benefits from the oversight of the local government and the support of the community. While it may not have federal funding or involvement, its significance as a historic and functional structure underscores the importance of responsible stewardship and continued maintenance for the enjoyment and safety of all who visit this beloved landmark on the Shell Rock River.
Year Completed |
1860 |
Dam Length |
170 |
Dam Height |
8 |
River Or Stream |
SHELL ROCK RIVER |
Primary Dam Type |
Gravity |
Surface Area |
40 |
Hydraulic Height |
5 |
Drainage Area |
529 |
Nid Storage |
153 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
8 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Cedar River At Charles City
|
450cfs |
Winnebago River At Mason City
|
166cfs |
Little Cedar River Near Ionia
|
70cfs |
Shell Rock River At Shell Rock
|
484cfs |
Cedar River At Waverly
|
436cfs |
West Fork Cedar River At Finchford
|
502cfs |
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.
Rockford Dam