Spofford Lake Dam dam
Spofford Lake Dam
Spofford Lake Dam, located in Chesterfield, New Hampshire, serves as a vital structure for recreational purposes, offering a serene environment for water resource and climate enthusiasts to enjoy. Built in 1919, this Earth-type dam stands at a height of 11 feet and stretches 83 feet in length, creating a storage capacity of 10,650 acre-feet. The dam overlooks Partridge Brook and plays a crucial role in managing water flow and storage in the area.
Managed by the NHDES Dam Bureau and regulated by the State of New Hampshire, Spofford Lake Dam boasts a significant hazard potential but is currently deemed to be in satisfactory condition. With a spillway width of 18 feet and a maximum discharge capacity of 550 cubic feet per second, the dam's risk assessment is moderate. Despite this, regular inspections and enforcement ensure the dam's safety and functionality, offering peace of mind to those who frequent the picturesque Spofford Lake.
For water resource and climate enthusiasts, Spofford Lake Dam presents a fascinating combination of historical significance and modern regulatory oversight. Its role in supporting recreational activities while managing water levels underscores the importance of responsible dam management in safeguarding both the environment and public safety. As a key feature of the Cheshire County landscape, Spofford Lake Dam stands as a testament to the intersection of human ingenuity and natural beauty in the New Hampshire region.
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 Spofford Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ashuelot River At West Swanzey | 598 cfs | → |
| Ashuelot River Above The Branch | 21 cfs | → |
| Ashuelot River Below Surry Mt Dam | 259 cfs | → |
| Ashuelot River At Hinsdale | 758 cfs | → |
| Otter Brook Below Otter Brook Dam | 12 cfs | → |
| S Br Ashuelot River At Webb | 25 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Spofford Lake Dam.
Boat launches
- Spofford Lake Boat Launch
- Connecticut River Boat Launch
- Swanzey Lake Boat Launch
- Wilson Pond Boat Launch
- Surry Mountain Lake
Campgrounds
- Wheelock Park Campground
- Pilgrim Pines Camping Area
- Swanzey Lake Camping Area
- Fort Dummer State Park
- Richardson-Zlogar Cabin
- Falls Brook Shelter
Paddle runs
- First Bridge Upstream On Route 100 To Confluence With West River
- Headwaters To First Bridge Upstream On Route 100
- Headwaters To Confluence With West River (End Of Sherman Road)
- Headwaters To North Of Searsburg Reservoir
- End Of Kendall Farm Road To Confluence With West River
- Headwaters To End Of Kendall Farm Road
Track Spofford 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 Spofford Lake Dam
Where does the data for Spofford 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 Spofford Lake Dam.