Lake Mottram Upground Reservoir Reservoir Report
Last Updated: December 19, 2025
Lake Mottram Upground Reservoir, also known as Fostoria Reservoir No.
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Summary
2, is a vital water resource located in Hancock County, Ohio. Managed by the local government, this reservoir has been serving as a water supply source since it was completed in 1891. With a storage capacity of 297 acre-feet and a surface area of 15 acres, the reservoir plays a crucial role in meeting the water needs of the surrounding area.
Designed by Charles Latshaw, Lake Mottram Upground Reservoir is regulated by the Ohio Department of Natural Resources and undergoes regular inspections to ensure its safety and functionality. The reservoir, situated along the East Branch Portage River, features an earth dam with a height of 19.6 feet and a length of 3880 feet. Despite being classified as having a high hazard potential, the reservoir is currently assessed to be in fair condition, as of the last inspection in May 2016.
Water resource and climate enthusiasts would be fascinated by the history and engineering of Lake Mottram Upground Reservoir, as well as its importance in providing water supply for the region. With its picturesque setting and crucial role in water management, this reservoir stands as a testament to the ingenuity and foresight of its designers and serves as a vital asset in sustaining the local ecosystem and community.
Year Completed |
1891 |
Dam Length |
3880 |
Dam Height |
19.6 |
River Or Stream |
EAST BRANCH PORTAGE RIVER - OFFSTREAM |
Primary Dam Type |
Earth |
Surface Area |
15 |
Drainage Area |
0.03 |
Nid Storage |
297 |
Hazard Potential |
High |
Nid Height |
20 |
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.
Lake Mottram Upground Reservoir