Lionshead Lake Dam dam
Lionshead Lake Dam
Lionshead Lake Dam in Wayne Township, New Jersey, stands as a crucial structure for recreation in the area, with a primary purpose of providing a recreational environment for locals and visitors alike. Completed in 1939, the dam stands at a height of 27 feet and stretches 200 feet in length, holding a maximum storage capacity of 75 acre-feet and a normal storage of 60 acre-feet. It sits along the Haycock Brook, serving as a vital component for water resource management and flood control in the region.
Despite its historical significance and recreational value, Lionshead Lake Dam faces challenges in terms of its condition assessment, with a poor rating and a high hazard potential attributed to its current state. The dam has been flagged for inspection every two years, with the latest assessment conducted in December 2021. With potential risks associated with its structural integrity, stakeholders and authorities must prioritize maintenance and rehabilitation efforts to ensure the safety and longevity of this essential water management infrastructure.
As water resource and climate enthusiasts take interest in Lionshead Lake Dam, its presence along the Haycock Brook and the surrounding area highlights the delicate balance between human recreation and environmental sustainability. With the dam falling under state regulation and inspection by the New Jersey Department of Environmental Protection, it underscores the importance of proactive measures to safeguard against potential hazards and ensure the continued functionality of this critical infrastructure for years to come.
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 Lionshead Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pompton River At Pompton Plains Nj | 147 cfs | → |
| Ramapo River At Pompton Lakes Nj | 82 cfs | → |
| Pequannock River At Riverdale Nj | 16 cfs | → |
| Wanaque R At Wanaque Nj | 13 cfs | → |
| Passaic River At Little Falls Nj | 83 cfs | → |
| West Brook Near Wanaque Nj | 6 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lionshead Lake Dam.
Boat launches
- North Corporate Drive 2, Riverdale
- Lakeside Avenue Pompton Lakes
- Island Avenue Little Falls
- Greenwood Lake Turnpike Ringwood
- Veterans Court Passaic
- Ringwood-Ramapo Trail Ringwood
Track Lionshead 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.
About Lionshead Lake Dam
Where does the data for Lionshead 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.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Lionshead Lake Dam.