Dam Report

Sunset Lake Dam dam

New Jersey, USA Cohansey River Hazard High
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Dam height
20ft
Hazard rating
High
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Sunset Lake Dam -- None dam
Sunset Lake Dam None · Cohansey River
About this dam

Sunset Lake Dam

Sunset Lake Dam, located in Bridgeton City, New Jersey, is a local government-owned structure that has been regulating the flow of the Cohansey River since its completion in 1927. With a primary purpose of recreation, this earth dam stands at a height of 20 feet and has a length of 6200 feet, creating a surface area of 94 acres and a normal storage capacity of 310 acre-feet. Despite its fair condition assessment, the dam has a high hazard potential, highlighting the importance of regular inspections and maintenance.

Managed by the New Jersey Department of Environmental Protection, Sunset Lake Dam is state-regulated, with permits, inspections, and enforcement measures in place to ensure its safe operation. The dam's last inspection in April 2019 revealed its fair condition, prompting a biennial inspection frequency to monitor any changes. While no emergency action plan (EAP) is currently in place, it is crucial for stakeholders to consider implementing one to address any potential risks or hazards associated with the dam.

As a key feature in the local landscape, Sunset Lake Dam plays a vital role in providing recreational opportunities and regulating the water flow of the Cohansey River. With its historical significance dating back to the early 20th century, this earth dam serves as a reminder of the importance of sustainable water resource management and climate resilience in the face of changing environmental conditions.

StateNone
River / streamCohansey River
NID IDNJ00063
Owner typeLocal Government
Primary purposeRecreation
Dam typeEarth
Year built1927
Dam height20 ft
Dam length6,200 ft
Normal storage310 AF
Surface area94.0 ac
Drainage area45.7 sq mi
Hazard potentialHigh
ConditionFair
Last inspectionWed, 10 Apr 2019 12:00:00 GMT

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.
Detailed forecast

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.

Hourly detail

Next 5 days, hour by hour

Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.

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Deep dive

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.

TimeConditionTemp (°F)Snow (in)Rain (in)Humidity (%)Wind (mps)Wind dir
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Long-term outlook

15-day temperature & precipitation

Daily temperatures, snow, and rain projected over the next two weeks.

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Regional inflow

Nearby streamflow gauges

USGS streamgauges around Sunset Lake Dam -- inflows here typically show up in storage 24-72 hours later.

Track Sunset Lake Dam 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.

FAQ

About Sunset Lake Dam

Where does the data for Sunset Lake Dam 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.

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Manage alerts in the Snoflo app

Custom alerts are configured in the iOS app -- favorite this dam, set a threshold, and you'll get a push the moment conditions cross.

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