Haledon Reservoir Dam dam
Haledon Reservoir Dam
The Haledon Reservoir Dam, located in North Haledon, New Jersey, was completed in 1919 and stands at a height of 25 feet with a length of 625 feet. It serves as a critical Earth-type structure on Molly Ann Brook, with a storage capacity of 1280 acre-feet and a maximum discharge of 750 cubic feet per second. The dam's primary purpose is designated as 'Other,' indicating its significance beyond traditional water resource management.
Managed by the local government and regulated by the New Jersey Department of Environmental Protection, the Haledon Reservoir Dam presents a high hazard potential but has been assessed as satisfactory in condition. With a surface area of 75 acres and a drainage area of 1.45 square miles, the dam plays a crucial role in providing water storage and flood control in the region. While its last inspection was conducted in May 2021, regular assessments and emergency preparedness measures are in place to ensure the safety and integrity of the structure.
As a key component of the water infrastructure in Passaic County, the Haledon Reservoir Dam underscores the importance of sustainable water resource management and climate resilience. Its historical significance, coupled with its modern-day regulatory oversight and maintenance practices, exemplifies the critical role that dams play in safeguarding communities and ecosystems against the impacts of extreme weather events and changing climate patterns. The dam's location and design reflect a balance between operational efficiency and environmental stewardship, highlighting the intersection of water resources and climate adaptation in the local context.
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 Haledon Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ramapo River At Pompton Lakes Nj | 82 cfs | → |
| Pompton River At Pompton Plains Nj | 147 cfs | → |
| Hohokus Brook At Ho-Ho-Kus Nj | 20 cfs | → |
| Pequannock River At Riverdale Nj | 16 cfs | → |
| Saddle River At Ridgewood Nj | 11 cfs | → |
| Passaic River At Little Falls Nj | 83 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Haledon Reservoir Dam.
Boat launches
- Lakeside Avenue Pompton Lakes
- North Corporate Drive 2, Riverdale
- Island Avenue Little Falls
- Veterans Court Passaic
- Ringwood-Ramapo Trail Ringwood
- Greenwood Lake Turnpike Ringwood
Track Haledon Reservoir 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.
About Haledon Reservoir Dam
Where does the data for Haledon Reservoir 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Haledon Reservoir Dam.