Leddell's Pond Dam dam
Leddell's Pond Dam
Leddell's Pond Dam, located in Mendham Township, Morris County, New Jersey, is a local government-owned structure regulating the flow of the Passaic River. The dam, primarily designed for recreational purposes, is classified as an Earth type with a height of 12 feet and a length of 335 feet. With a storage capacity of 34 acre-feet and a surface area of 5 acres, the dam plays a significant role in providing recreational opportunities for the local community while also serving as a vital component of water resource management in the region.
Despite its satisfactory condition assessment as of November 2021, Leddell's Pond Dam poses a significant hazard potential, prompting a biennial inspection frequency to ensure its structural integrity and safety. The New Jersey Department of Environmental Protection (NJDEP) regulates the dam, overseeing its permitting, inspection, and enforcement processes. As a key feature in the local landscape, the dam's maintenance and emergency preparedness are paramount to mitigating risks and ensuring the safety of surrounding residents and infrastructure.
As climate change continues to impact water resources and infrastructure, Leddell's Pond Dam stands as a crucial piece of New Jersey's water management strategy. With its strategic location along the Passaic River and its role in providing recreational amenities to the community, the dam serves as a reminder of the importance of sustainable water resource management and the need for proactive risk assessment and management measures to adapt to changing environmental conditions.
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 Leddell's Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Whippany River Near Morristown Nj | 8 cfs | → |
| Whippany River At Morristown Nj | 24 cfs | → |
| North Branch Raritan River Near Far Hills Nj | 25 cfs | → |
| Passaic River Near Millington Nj | 15 cfs | → |
| Passaic River Near Chatham Nj | 46 cfs | → |
| Lamington (Black) River Near Pottersville Nj | 20 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Leddell's Pond Dam.
Boat launches
- Dell Avenue 9, Netcong
- South Main Street Bound Brook
- Jefferson Lake Road Sussex County
- Island Avenue Little Falls
- South 3rd Avenue Highland Park
- North Corporate Drive 2, Riverdale
Track Leddell's Pond 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 Leddell's Pond Dam
Where does the data for Leddell's Pond 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 Significant 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 Leddell's Pond Dam.