Summary

The dam was built in the early 20th century for the purpose of creating a recreational lake. The lake covers an area of 898 acres and has a maximum depth of 22 feet. The hydrology of the area is influenced by the Maurice River watershed, which covers an area of 386 square miles. Specific surface flow providers include the Maurice River and several smaller tributaries. Snowpack provides a significant amount of the water supply during the winter months. The area around Union Lake is used for agriculture, including cranberry farming. The lake is also a popular destination for recreational activities such as fishing, boating, and swimming.

Regional Streamflow Levels

Maurice River At Norma Nj 111.0cfs	111cfs
Cohansey River At Seeley Nj 25.2cfs	25cfs
Tuckahoe River At Head Of River Nj 25.9cfs	26cfs
Great Egg Harbor River At Folsom Nj 60.4cfs	60cfs
Little Ease Rn Nr Clayton Nj 2.3cfs	2cfs
Great Egg Harbor R Nr Blue Anchor Nj 28.6cfs	29cfs

15-Day Long Term Forecast

Reservoir Details

24hr Change	None%
Percent of Normal	None%
Minimum	9.5 1993-09-12
Maximum	1,080.0 1994-04-07
Average
Dam_Height	35
Drainage_Area	218
Year_Completed	1869
Nid_Storage	20100
Primary_Dam_Type	Earth
River_Or_Stream	Maurice River
Surface_Area	850
Hazard_Potential	High
Dam_Length	2000
Nid_Height	35

Seasonal Comparison

Streamflow, Ft³/S Levels

5-Day Hourly Forecast Detail

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.