Mount Sunapee Sewage Lagoon Dam dam
Mount Sunapee Sewage Lagoon Dam
The Mount Sunapee Sewage Lagoon Dam, located in Newbury, New Hampshire, was completed in 1973 and stands at a height of 22 feet. This earthen dam, with a length of 1300 feet, serves a primary purpose of "Other" and is classified as a buttress dam type. The dam has a storage capacity of 14 acre-feet and covers a surface area of 2.8 acres.
Managed by the NHDES Dam Bureau, the dam is regulated, permitted, inspected, and enforced by the state of New Hampshire. Despite being rated as having a "Significant" hazard potential, the dam is currently in "Satisfactory" condition as of the last assessment in September 2017. The dam has no spillway and is not associated with any locks or outlet gates.
With a high risk assessment rating, the Mount Sunapee Sewage Lagoon Dam is closely monitored for any potential issues or emergencies. The dam plays a crucial role in water resource management in the area and serves as an important infrastructure for the community. Climate and water resource enthusiasts would find this dam's data and management practices of particular interest in understanding the intersection of infrastructure, climate adaptation, and water resource management.
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 Mount Sunapee Sewage Lagoon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Sugar River At West Claremont | 431 cfs | → |
| Contoocook River Near Henniker | 782 cfs | → |
| North Branch River Near Antrim | 61 cfs | → |
| Warner River At Davisville | 405 cfs | → |
| Contoocook R Bl Hopkinton Dam At W Hopkinton | 1,080 cfs | → |
| Blackwater River Near Webster | 19 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mount Sunapee Sewage Lagoon Dam.
Boat launches
- Rand Pond Boat Launch
- Lake Avenue 51, Newbury
- Sunapee Lake Boat Launch
- Perkins Pond Boat Launch
- Butterfield Pond Boat Launch
- Lake Coniston (Long Pond) Boat Launch
Campgrounds
- Northstar Campground
- Camp Wilmot
- Fox Brook Tent Site
- Mt. Ascutney State Park
- Mile-Away Campground
- Tree Farm Campground
Paddle runs
- Begins In Franklin To Sewall's Island
- Sewall's Island To Manchester Street Bridge
- Headwaters To Crossing Of Route 100 Near Route 155
- First Bridge Upstream On Route 100 To Confluence With West River
- Headwaters To First Bridge Upstream On Route 100
- Confluence With Otter Creek To Ten Kilns Brook
Track Mount Sunapee Sewage Lagoon 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 Mount Sunapee Sewage Lagoon Dam
Where does the data for Mount Sunapee Sewage Lagoon 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 Mount Sunapee Sewage Lagoon Dam.