Todd Lake Dam dam
Todd Lake Dam
Todd Lake Dam, located in Bradford, New Hampshire, is a concrete buttress dam completed in 1858 primarily for recreational purposes. With a height of 16.5 feet and a length of 211 feet, the dam controls Ring Brook, offering a serene 198-acre surface area for water enthusiasts to enjoy. Despite its age, Todd Lake Dam has a significant storage capacity of 1,347 acre-feet, with a normal storage level of 336 acre-feet.
Although the dam's hazard potential is deemed significant and its condition assessment poor, it is inspected every four years by the NHDES DAM BUREAU to ensure compliance and safety. The spillway, with a width of 54 feet, is uncontrolled, allowing for the natural flow of water. The risk assessment for Todd Lake Dam is moderate, indicating the need for ongoing monitoring and management measures to mitigate potential risks. Additionally, the dam is regulated and permitted by the state, enforcing strict guidelines for its operation and maintenance. For water resource and climate enthusiasts, Todd Lake Dam serves as a historical landmark with valuable recreational opportunities in the picturesque Merrimack County of New Hampshire.
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 Todd Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Contoocook River Near Henniker | 782 cfs | → |
| Warner River At Davisville | 405 cfs | → |
| Contoocook R Bl Hopkinton Dam At W Hopkinton | 1,080 cfs | → |
| North Branch River Near Antrim | 61 cfs | → |
| Blackwater River Near Webster | 19 cfs | → |
| Merrimack River At Franklin Junction | 5,420 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Todd Lake Dam.
Boat launches
- Massasecum Lake Boat Launch
- Rand Pond Boat Launch
- Lake Avenue 51, Newbury
- Butterfield Pond Boat Launch
- Halfmoon Pond Boat Launch
- Smith Pond Boat Launch
Campgrounds
- Northstar Campground
- Mile-Away Campground
- Fox Brook Tent Site
- Camp Wilmot
- Camp Spaulding
- Tree Farm Campground
Paddle runs
- Begins In Franklin To Sewall's Island
- Sewall's Island To Manchester Street Bridge
- First Bridge Upstream On Route 100 To Confluence With West River
- Headwaters To Crossing Of Route 100 Near Route 155
- Headwaters To First Bridge Upstream On Route 100
- Thornton Railroad Bridge To Bridgewater/Bristol Town Line
Track Todd 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 Todd Lake Dam
Where does the data for Todd 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 Todd Lake Dam.