Del-Co Upland Storage Reservoir No. 2 Reservoir Report

Last Updated: December 5, 2025

Del-Co Upland Storage Reservoir No.


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Summary

2, located in Delaware, Ohio, is a key water resource managed by a public utility. This reservoir, completed in 1989, plays a crucial role in water supply, with a storage capacity of 825.8 acre-feet and a surface area of 30.5 acres. The dam, primarily constructed with earth and stone core, stands at a height of 42.5 feet and serves as a vital infrastructure for the region's water management.

Managed and regulated by the Department of Natural Resources in Ohio, this reservoir on the Olentangy River offstream not only ensures water supply but also mitigates flood risks with its uncontrolled spillway. Despite being classified with a high hazard potential, the dam is assessed to be in satisfactory condition, last inspected in July 2018. With a moderate risk rating, the reservoir undergoes regular inspections every 5 years to maintain its operational integrity and ensure public safety. This site stands as a testament to responsible water resource management in the face of changing climate conditions.

Year Completed

1989

Dam Length

4580

Dam Height

42.5

River Or Stream

OLENTANGY RIVER - OFFSTREAM

Primary Dam Type

Earth

Surface Area

30.5

Drainage Area

0.05

Nid Storage

825.8

Outlet Gates

Uncontrolled

Hazard Potential

High

Foundations

Soil

Nid Height

43
       
Seasonal Comparison

Weather Forecast

Dam Data Reference

Condition Assessment

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.