Blockton Watershed Site K-1 Reservoir Report
Last Updated: December 13, 2025
Blockton Watershed Site K-1 is a critical water resource located in Taylor, Iowa, specifically in the city of Athelstan.
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Summary
This site, managed by the local government, serves multiple purposes including fire protection, stock watering, and small fish pond maintenance. With a dam height of 28 feet and a storage capacity of 61 acre-feet, this earth dam was completed in 1973 and is regulated by the Iowa Department of Natural Resources.
The dam, situated along the TR-Platte River, covers a surface area of 4.8 acres and has a drainage area of 0.26 square miles. Despite being rated as having a low hazard potential, the risk assessment for Blockton Watershed Site K-1 indicates a moderate risk level (3). The dam is primarily used for flood risk reduction and has an uncontrolled spillway type. While the condition assessment is currently listed as "not rated," the site is subject to state permitting, inspection, and enforcement.
Overall, Blockton Watershed Site K-1 is a significant asset for water management in the region, providing essential services for both agricultural and ecological needs. With its strategic location and crucial functions, this site represents a key component in the local water resource infrastructure, contributing to the sustainability and resilience of the surrounding environment in Taylor County, Iowa.
Year Completed |
1973 |
Dam Length |
553 |
Dam Height |
28 |
River Or Stream |
TR-PLATTE RIVER |
Primary Dam Type |
Earth |
Surface Area |
4.8 |
Drainage Area |
0.26 |
Nid Storage |
61 |
Hazard Potential |
Low |
Foundations |
Soil |
Nid Height |
28 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
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.
Blockton Watershed Site K-1