Parsippany Dike dam
Parsippany Dike
Parsippany Dike, located in Morris County, New Jersey, is a critical structure managed by the local government for water supply purposes. This masonry dam, completed in 1905, stands at a height of 30 feet and spans a length of 2150 feet along the Rockaway River. With a normal storage capacity of 28,000 acre-feet and covering a surface area of 800 acres, the dam plays a vital role in regulating water flow and ensuring a stable water supply for the region.
Despite its age, Parsippany Dike has been assessed as being in satisfactory condition, with a high hazard potential. Regular inspections, with the last one conducted in July 2021, ensure that the dam meets safety standards and is well-maintained. The dam is regulated by the New Jersey Department of Environmental Protection, with state oversight for permitting, inspection, and enforcement to ensure its continued safe operation.
In the event of an emergency, there is a need for an emergency action plan (EAP) to guide response and mitigate risks. While the EAP status and adherence to guidelines are not specified in the data, ongoing assessments and risk management measures are essential to protect the surrounding community and infrastructure. As water resource and climate enthusiasts, understanding the importance of structures like Parsippany Dike highlights the interconnectedness of water management, infrastructure resilience, and emergency preparedness in safeguarding our environment and communities.
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 Parsippany Dike -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Rockaway River Below Reservoir At Boonton Nj | 10 cfs | → |
| Rockaway River Above Reservoir At Boonton Nj | 472 cfs | → |
| Whippany River Near Pine Brook Nj | 32 cfs | → |
| Whippany River At Morristown Nj | 22 cfs | → |
| Passaic River At Pine Brook Nj | 123 cfs | → |
| Whippany River Near Morristown Nj | 7 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Parsippany Dike.
Boat launches
- Island Avenue Little Falls
- North Corporate Drive 2, Riverdale
- Lakeside Avenue Pompton Lakes
- Dell Avenue 9, Netcong
- Veterans Court Passaic
- Jefferson Lake Road Sussex County
Track Parsippany Dike 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 Parsippany Dike
Where does the data for Parsippany Dike 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 Parsippany Dike.