John C Youngman dam
John C Youngman
John C Youngman, also known as Mosquito Creek Reservoir, is a vital water supply infrastructure in Limestone Township, Pennsylvania. Owned and regulated by the local government, this earth dam stands tall at a height of 100.5 feet and was completed in 1951. With a storage capacity of 2581 acre-feet, it serves the primary purpose of water supply for the surrounding area.
Situated along the Mosquito Creek in Lycoming County, Pennsylvania, the John C Youngman dam plays a crucial role in managing water resources in the region. Despite its fair condition assessment and high hazard potential, the dam has been inspected regularly, with the last inspection conducted in October 2020. The Pennsylvania Department of Environmental Protection oversees its permitting, inspection, and enforcement, ensuring its safety and reliability for water supply.
Climate and water resource enthusiasts will be intrigued by the engineering and environmental aspects of the John C Youngman dam, as well as its impact on the local ecosystem. With a surface area of 61 acres and a drainage area of 2.12 square miles, this dam not only provides water storage but also contributes to flood control and water quality management along the Mosquito Creek. Its historical significance and ongoing maintenance efforts make it a noteworthy site for those interested in sustainable water resource management and climate resilience.
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.
- 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.
- 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.
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, environmental 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.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around John C Youngman -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Wb Susquehanna River At Williamsport | 5,870 cfs | → |
| Wb Susquehanna River At Jersey Shore | 5,490 cfs | → |
| West Branch Susquehanna River At Allenwood | 6,980 cfs | → |
| Loyalsock Creek At Loyalsockville | 424 cfs | → |
| Pine Creek Bl L Pine Creek Near Waterville | 925 cfs | → |
| West Branch Susquehanna River At Lewisburg | 6,770 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near John C Youngman.
Boat launches
Campgrounds
- Bald Eagle #4
- Bald Eagle #5
- Ravensburg State Park
- Bald Eagle #8
- Bald Eagle State Forest Campsite #7
- Rb Winter State Park
Track John C Youngman in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About John C Youngman
Where does the data for John C Youngman come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the High hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of John C Youngman.