Colebrook Sewage Lagoon Dam dam
Colebrook Sewage Lagoon Dam
Colebrook Sewage Lagoon Dam, located in Coos County, New Hampshire, serves as a vital water resource management structure for the city of Colebrook. Built in 1980, this earth dam stands at a height of 15 feet and has a length of 3100 feet, providing a storage capacity of 24 acre-feet. Despite having no spillway, the dam is designed to handle significant hazard potential with a satisfactory condition assessment.
Managed by the local government and regulated by the New Hampshire Department of Environmental Services Dam Bureau, Colebrook Sewage Lagoon Dam is inspected every four years to ensure its structural integrity and functionality. With a high risk assessment rating of 2, the dam's risk management measures are crucial in mitigating any potential emergencies or inundation events. Although primarily serving as a sewage lagoon, this dam plays a crucial role in maintaining water quality and quantity in the region.
For water resource and climate enthusiasts, Colebrook Sewage Lagoon Dam presents an intriguing case study of a multifunctional earth dam that addresses both water management and environmental concerns. With its location in a pristine natural setting, the dam's efficient design and operation highlight the importance of sustainable water infrastructure in mitigating climate-related challenges. As efforts continue to enhance its risk management measures and emergency preparedness, Colebrook Sewage Lagoon Dam stands as a crucial asset in the region's water resource management framework.
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 Colebrook Sewage Lagoon Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Connecticut R Below Indian Stream Nr Pittsburg | 332 cfs | → |
| Connecticut River At North Stratford | 1,420 cfs | → |
| Upper Ammonoosuc River Near Groveton | 511 cfs | → |
| Androscoggin River At Errol | 2,410 cfs | → |
| Diamond River Near Wentworth Location | 315 cfs | → |
| East Branch Passumpsic River Near East Haven | 128 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Colebrook Sewage Lagoon Dam.
Boat launches
- Back Pond Boat Launch
- Lake Access Road Canaan
- Jackson Road 2281, Averill
- Cottage Road Averill
- Back Lake Boat Launch
- Millsfield Pond Boat Launch
Campgrounds
- Coleman State Park
- Lake Francis State Park
- Percy Loop Tentsite
- Brighton State Park
- Maidstone State Park
- Mollidgewock State Park
Paddle runs
Track Colebrook 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 Colebrook Sewage Lagoon Dam
Where does the data for Colebrook 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 Colebrook Sewage Lagoon Dam.