Johnson Lake Dam dam
Johnson Lake Dam
Johnson Lake Dam in Sussex, New Jersey, is a local government-owned structure regulated by the New Jersey Department of Environmental Protection. This earth and gravity dam, with a height of 11.3 feet and a length of 42 feet, serves primarily for recreational purposes along the Lubbers Run-TR river or stream. The dam has a storage capacity of 198 acre-feet, providing a surface area of 33 acres and a drainage area of 0.6 square miles.
Despite its low hazard potential, Johnson Lake Dam undergoes regular inspections with a satisfactory condition assessment as of November 2018. The dam, located in Byram Township, falls under Congressional District 11 represented by Mikie Sherrill (D). While no specific year of completion is provided, the dam continues to be an important part of the local landscape, offering recreational opportunities and contributing to the overall water resource management in the area.
Water resource and climate enthusiasts will find Johnson Lake Dam to be a notable structure in the region, showcasing the importance of earth dams for both recreational and water management purposes. With its regulated status and regular inspections, the dam stands as a testament to the careful monitoring and maintenance required for such infrastructure. As climate change impacts water resources, understanding the role of dams like Johnson Lake in mitigating risks and providing essential services becomes increasingly crucial for sustainable water management practices.
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 Johnson Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Pequest River At Huntsville Nj | 15 cfs | → |
| Musconetcong River At Outlet Of Lake Hopatcong Nj | 14 cfs | → |
| Eb Paulins Kill Near Lafayette Nj | 11 cfs | → |
| Green Pd Bk Bl Picatinny Lk At Picatinny Ars Nj | 2 cfs | → |
| Green Pond Brook At Picatinny Arsenal Nj | 2 cfs | → |
| Sb Raritan River At Four Bridges Nj | 16 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Johnson Lake Dam.
Boat launches
- Jefferson Lake Road Sussex County
- Dell Avenue 9, Netcong
- West Shore Drive Stillwater Township
- Mcdade Recreational Trail Delaware
- Poxono Access Area In Nj
- Front Street Belvidere
Track Johnson 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 Johnson Lake Dam
Where does the data for Johnson 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 Low 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 Johnson Lake Dam.