Mosquito Creek Reservoir Report

Last Updated: December 9, 2025

Mosquito Creek, also known as the Distribution Reservoir, is a vital water supply source located in Armstrong Township, Lycoming, Pennsylvania.


°F

°F

mph

Wind

%

Humidity

Summary

Owned by the local government, this dam was completed in 1890 and stands at a height of 15 feet with a length of 1201 feet. With a storage capacity of 64 acre-feet and a drainage area of 0.6 square miles, Mosquito Creek serves the primary purpose of water supply for the surrounding communities.

Managed and regulated by the Pennsylvania Department of Environmental Protection, Mosquito Creek is classified as a high hazard potential dam with a fair condition assessment. The dam's inspection frequency is once a year, with the last inspection conducted in October 2020. Despite its age, the dam continues to effectively store water, with a normal storage capacity of 50 acre-feet and a surface area of 5 acres. The surrounding area is at risk of inundation in case of a breach, highlighting the importance of regular maintenance and risk management measures.

Situated within the WTRSHD Mosquito Creek, this dam plays a crucial role in ensuring a reliable water supply for the region. With its earth dam type and buttress core, Mosquito Creek stands as a testament to historical engineering and construction practices. As climate change continues to impact water resources, the maintenance and upkeep of dams like Mosquito Creek are essential to safeguarding water security and mitigating potential risks to surrounding communities.

Year Completed

1890

Dam Length

1201

Dam Height

15

River Or Stream

WTRSHD MOSQUITO CREEK

Primary Dam Type

Earth

Surface Area

5

Drainage Area

0.6

Nid Storage

64

Hazard Potential

High

Foundations

Unlisted/Unknown

Nid Height

15
       
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.
View more

Area Campgrounds