Rolling Greens (Bethlehem Twp Det) dam
Rolling Greens (Bethlehem Twp Det)
Rolling Greens (Bethlehem Twp Det) is a vital flood risk reduction structure located in Bethlehem Township, Pennsylvania. Completed in 1986, this earth dam stands at a height of 12 feet and has a length of 375 feet, providing a storage capacity of 7.8 acre-feet. Situated along the TR NANCY RUN stream, this dam is under the regulatory oversight of the Pennsylvania Department of Environmental Protection, ensuring state permitting, inspection, and enforcement measures are in place to maintain its integrity.
With a hazard potential rated as high, Rolling Greens plays a crucial role in mitigating flooding risks in the region. Despite this, the condition assessment deems the structure as satisfactory, indicating it is currently able to perform its intended function effectively. Regular inspections are conducted to monitor its safety and functionality, with the most recent inspection carried out in January 2021, demonstrating a commitment to maintaining the dam's stability and resilience.
As an essential component of flood risk reduction efforts in Northampton County, Rolling Greens serves as a testament to the proactive measures taken by local government agencies to protect communities and infrastructure from potential water-related disasters. With a clear focus on public safety and environmental preservation, this dam stands as a crucial feature in the region's water resource management and climate resilience strategies, showcasing the importance of proactive infrastructure planning and maintenance in the face of changing climate conditions.
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 Rolling Greens (Bethlehem Twp Det) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Monocacy Creek At Bethlehem | 30 cfs | → |
| Lehigh River At Bethlehem | 1,430 cfs | → |
| Lehigh River At Glendon | 1,460 cfs | → |
| Bushkill Creek Ab Rt 33 Bridge At Tatamy | 77 cfs | → |
| Jordan Creek At Allentown | 16 cfs | → |
| Little Lehigh Creek At Tenth St. Br. At Allentown | 65 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Rolling Greens (Bethlehem Twp Det).
Track Rolling Greens (Bethlehem Twp Det) 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 Rolling Greens (Bethlehem Twp Det)
Where does the data for Rolling Greens (Bethlehem Twp Det) 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 Rolling Greens (Bethlehem Twp Det).