Diamond Mill Pond Dam dam
Diamond Mill Pond Dam
Diamond Mill Pond Dam, located in Millburn, New Jersey, along the Rahway River, was completed in 1937 and stands at a height of 9 feet with a length of 375 feet. The primary purpose of this earth dam is for recreational use, offering a serene setting for outdoor enthusiasts to enjoy the surrounding natural beauty. With a storage capacity of 24 acre-feet, the dam provides a normal storage capacity of 11 acre-feet and covers a surface area of 4 acres within a drainage area of 7.1 square miles.
Managed by the local government and regulated by the New Jersey Department of Environmental Protection, Diamond Mill Pond Dam has been assessed to be in fair condition with a significant hazard potential. Regular inspections are conducted, with the most recent one in April 2021, to ensure the safety and integrity of the structure. Despite its age, the dam continues to serve its recreational purpose, attracting visitors to its picturesque location in Essex County. In the event of an emergency, preparations are in place, with an Emergency Action Plan last revised in May 2021.
Congressional District 07's representative, Tom Malinowski, oversees the area where Diamond Mill Pond Dam is situated, emphasizing the importance of maintaining and monitoring the dam for the safety and enjoyment of the community. As a vital part of the local water resource infrastructure, the dam plays a crucial role in flood control and water management along the Rahway River. With its historical significance and ongoing maintenance efforts, Diamond Mill Pond Dam remains a key feature in the region's natural landscape, offering both recreational opportunities and environmental benefits for residents and visitors alike.
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 Diamond Mill Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Canoe Brook Near Summit Nj | 1 cfs | → |
| Rahway River Near Springfield Nj | 10 cfs | → |
| Passaic River Near Chatham Nj | 34 cfs | → |
| Elizabeth R At Ursino Lake At Elizabeth Nj | 8 cfs | → |
| Green Brook At Seeley Mills Nj | 1 cfs | → |
| Rahway River At Rahway Nj | 15 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Diamond Mill Pond Dam.
Boat launches
- Island Avenue Little Falls
- Secaucus Municipal Ramp
- Woodbridge
- Veterans Court Passaic
- River Barge Park
- Secaucus Greenway Secaucus
Track Diamond Mill 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 Diamond Mill Pond Dam
Where does the data for Diamond Mill 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 Diamond Mill Pond Dam.