Lake Ashroe Dam dam
Lake Ashroe Dam
Lake Ashroe Dam, located in Sussex, New Jersey, is a state-owned structure primarily used for recreation purposes. Built in 1972, this earth dam stands at a height of 19 feet and has a storage capacity of 697 acre-feet, providing ample water resources for the area. With a surface area of 42 acres and a drainage area of 1.2 square miles, the dam plays a significant role in managing water flow and storage in the region.
Managed by the New Jersey Department of Environmental Protection (NJDEP), Lake Ashroe Dam is subject to regular state inspections, ensuring its structural integrity and safety. The dam has a significant hazard potential, but its condition assessment in 2020 deemed it satisfactory. In case of emergencies, an Emergency Action Plan (EAP) may be in place, although details on its preparation and guidelines adherence are not currently available. The dam's location on Big Flat Brook-TR and its proximity to Sandyston Township make it a key water resource for the surrounding area.
For water resource and climate enthusiasts, Lake Ashroe Dam presents a fascinating case study in dam management and regulation. Its construction by the Natural Resources Conservation Service and oversight by state agencies highlight the importance of maintaining infrastructure for both recreational and water storage purposes. The dam's role in controlling water flow, its storage capacity, and its potential risks underscore the critical need for continuous monitoring and maintenance to ensure the safety and sustainability of this essential water resource in New Jersey.
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 Lake Ashroe Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Delaware River At Montague Nj | 6,170 cfs | → |
| Flat Brook Near Flatbrookville Nj | 53 cfs | → |
| Eb Paulins Kill Near Lafayette Nj | 12 cfs | → |
| Little Bush Kill At Edgemere | 11 cfs | → |
| Bush Kill At Shoemakers | 148 cfs | → |
| Delaware River At Port Jervis Ny | 5,390 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lake Ashroe Dam.
Boat launches
- Mcdade Recreational Trail Delaware
- West Shore Drive Stillwater Township
- Otter Lane 101, Dingman Township
- Little Mud Pond
- Sunrise Drive 299, Dingman Township
- Lake Minisink
Track Lake Ashroe 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 Lake Ashroe Dam
Where does the data for Lake Ashroe 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 Lake Ashroe Dam.