Mountain Pond South Dam dam
Mountain Pond South Dam
Mountain Pond South Dam, located in Sanbornton, New Hampshire, is a vital piece of infrastructure owned by the local government for water supply purposes. Constructed in 1913, this earth dam stands at a height of 6.5 feet and has a storage capacity of 137 acre-feet, with a normal storage level of 100 acre-feet. The dam serves the purpose of regulating the flow of the TR PEMIGEWASSET RIVER, with a low hazard potential and fair condition assessment.
Despite its age, Mountain Pond South Dam has been regularly inspected by the NHDES DAM BUREAU, with the last inspection conducted in September 2019. The dam has a moderate risk assessment rating of 3, indicating the need for ongoing risk management measures. With its uncontrolled spillway type and a drainage area of 0.16 square miles, the dam plays a crucial role in ensuring a stable water supply for the surrounding area while maintaining a balance between water resource management and environmental conservation.
Overall, the Mountain Pond South Dam stands as a testament to the importance of sustainable water resource management in the face of changing climatic conditions. As a key component of the local water supply infrastructure, this dam serves as a reminder of the need for continued monitoring, maintenance, and risk assessment to ensure the safety and reliability of our water resources in the midst of a changing climate.
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 Mountain Pond South Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Smith River Near Bristol | 180 cfs | → |
| Winnipesaukee River At Tilton | 1,590 cfs | → |
| Merrimack River At Franklin Junction | 5,420 cfs | → |
| Pemigewasset River At Plymouth | 1,900 cfs | → |
| Baker River Near Rumney | 367 cfs | → |
| Blackwater River Near Webster | 19 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mountain Pond South Dam.
Boat launches
- Mooney Clark Landing Road Bristol
- Wickwas Lake Boat Launch
- Giles Pond Boat Launch
- Winona Lake Boat Launch
- Laconia Road 905, Tilton
- Bell Street Lakeport
Campgrounds
Paddle runs
- Begins In Franklin To Sewall's Island
- Thornton Railroad Bridge To Bridgewater/Bristol Town Line
- Sewall's Island To Manchester Street Bridge
- Woodstock/Thornton Town Line To Thornton Railroad Bridge
- Headwaters At Profile Lake To Southern Boundary Of Franconia Notch State Park
Track Mountain Pond South 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 Mountain Pond South Dam
Where does the data for Mountain Pond South 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 Low 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 Mountain Pond South Dam.