Iona Lake Dam dam
Iona Lake Dam
Iona Lake Dam, located in Franklin Township, New Jersey, is a local government-owned structure primarily designed for recreation purposes. Situated on the Still Run river, this earth dam stands at a height of 11 feet and spans 800 feet in length, with a storage capacity of 108 acre-feet and a surface area of 60 acres. Despite its recreational focus, the dam also serves important functions in terms of water resource management and climate resilience in the area.
With a significant hazard potential and a poor condition assessment as of the last inspection in March 2021, Iona Lake Dam poses a potential risk to the surrounding community. The dam is regulated by the New Jersey Department of Environmental Protection (NJDEP) and undergoes regular inspections and state enforcement to ensure its safety and functionality. However, there is a need for continued monitoring and potential risk management measures to mitigate any potential hazards associated with the dam.
As a key feature in the local water resource infrastructure, Iona Lake Dam requires ongoing attention and maintenance to ensure its safety and effectiveness in providing recreational opportunities while managing water resources in the region. With its unique location and purpose, the dam serves as a focal point for water resource and climate enthusiasts to engage with the challenges and opportunities of dam management and climate resilience in the area.
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 Iona Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Little Ease Rn Nr Clayton Nj | 2 cfs | → |
| Maurice River At Norma Nj | 70 cfs | → |
| Great Egg Harbor R Nr Blue Anchor Nj | 16 cfs | → |
| Great Egg Harbor R Nr Sicklerville Nj | 4 cfs | → |
| Great Egg Harbor River At Folsom Nj | 33 cfs | → |
| Cohansey River At Seeley Nj | 19 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Iona Lake Dam.
Boat launches
- Harding Highway Pittsgrove Township
- Centerton Road Elmer
- Piney Point Trail Cumberland County
- East Broad Street 13, Bridgeton
- Lakeside Avenue 440, Deptford
- Wma Access Road Cumberland County
Campgrounds
- Parvin State Park
- Yogi Bear Tall Pines Campground
- Indian Branch Park Campground
- Tinicum Island Primitive Campsite
- Atsion - Wharton State Forest
- Mullica River Campground
Fishing spots
Track Iona 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 Iona Lake Dam
Where does the data for Iona 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 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 Iona Lake Dam.