Split Rock Pond Dam dam
Split Rock Pond Dam
Split Rock Pond Dam, located in Rockaway, New Jersey, is a concrete structure completed in 1948 for the primary purpose of water supply. Standing at a height of 39 feet and spanning 490 feet in length, the dam has a storage capacity of 9,517 acre-feet and covers a surface area of 566 acres. The dam regulates the flow of Beaver Brook, a vital water source for the region with a drainage area of 5.6 square miles.
Managed by the local government and regulated by the New Jersey Department of Environmental Protection, Split Rock Pond Dam is classified as having a high hazard potential but is currently assessed as being in satisfactory condition. The dam undergoes inspections every two years, with the most recent assessment being in July 2021. Despite the potential risks associated with its high hazard classification, the dam is equipped with emergency action plans and is regularly monitored to ensure the safety of the surrounding community in the event of an emergency. This essential water resource infrastructure plays a crucial role in providing water supply for the area and underscores the importance of sustainable water management practices in the face of a changing climate.
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 Split Rock Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Green Pond Brook At Picatinny Arsenal Nj | 2 cfs | → |
| Pequannock R At Macopin Intake Dam Nj | 6 cfs | → |
| Rockaway River Above Reservoir At Boonton Nj | 472 cfs | → |
| Green Pd Bk Bl Picatinny Lk At Picatinny Ars Nj | 1 cfs | → |
| Rockaway River Below Reservoir At Boonton Nj | 10 cfs | → |
| Pequannock River At Riverdale Nj | 12 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Split Rock Pond Dam.
Boat launches
- North Corporate Drive 2, Riverdale
- Lakeside Avenue Pompton Lakes
- Island Avenue Little Falls
- Dell Avenue 9, Netcong
- Greenwood Lake Turnpike Ringwood
- Jefferson Lake Road Sussex County
Track Split Rock 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 Split Rock Pond Dam
Where does the data for Split Rock 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 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 Split Rock Pond Dam.