Souhegan River Site 12a South dam
Souhegan River Site 12a South
Located in Temple, New Hampshire, Souhegan River Site 12a South, also known as Senator Charles W Tobey Dam, is a vital structure designed by the USDA NRCS for flood risk reduction along Richardson Brook. Completed in 1965, this earth-type dam stands at a height of 37.7 feet with a storage capacity of 3,310 acre-feet and a drainage area of 5.4 square miles. The dam, regulated by the NHDES DAM BUREAU, has a spillway width of 3 feet and a maximum discharge of 8,483 cubic feet per second.
With a hazard potential rated as high and a fair condition assessment, Souhegan River Site 12a South serves as a crucial element in managing flood risk in the region. While the dam has not undergone recent modifications, it is subject to regular inspections to ensure its structural integrity. The site is under state jurisdiction and is permitted, inspected, and enforced by the New Hampshire authorities, highlighting the commitment to maintaining the safety and functionality of this essential water resource infrastructure in Hillsborough County.
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 Souhegan River Site 12a South -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Souhegan River (Site Wlr-1) Near Milford | 181 cfs | → |
| Contoocook River At Peterborough | 118 cfs | → |
| Nubanusit Bk Blw Macdowell Dam Nr Peterborough Nh | 31 cfs | → |
| Squannacook River Near West Groton | 83 cfs | → |
| Millers River Near Winchendon | 121 cfs | → |
| North Nashua River At Fitchburg | 101 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Souhegan River Site 12a South.
Boat launches
- Cunningham Pond Boat Launch
- Melendy Pond Boat Launch
- Grassy Pond Boat Launch
- Zephyr Lake Boat Launch
- Contoocook Lake Boat Launch
- Frost Pond Boat Launch
Campgrounds
- Damon Pond Campground
- Pearl Hill Campground
- Camp Wanocksett
- Mt Monadnock State Park Campground
- Lake Dennison State Park
- East Dennison Camping Area
Track Souhegan River Site 12a South 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 Souhegan River Site 12a South
Where does the data for Souhegan River Site 12a South 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 Souhegan River Site 12a South.