Lemanquais Pnd Dam dam
Lemanquais Pnd Dam
Lemanquais Pond Dam, located in Colebrook, Connecticut, is a privately-owned structure designed by the USDA NRCS with a primary purpose of serving as a Fish and Wildlife Pond. Completed in 1968, this Earth-type dam stands at a height of 10 feet and spans 300 feet in length, with a storage capacity of 117 acre-feet and a surface area of 23.3 acres. The dam is state-regulated and has been inspected as recently as May 2016, with a satisfactory condition assessment.
Despite its significant hazard potential, the dam is currently assessed as being in satisfactory condition. With a drainage area of 0.43 square miles, the dam serves as a critical habitat for fish and wildlife in the region. The presence of an uncontrolled spillway and other controlled outlet gates ensures proper management of water levels and mitigates the risk of flooding. Lemanquais Pond Dam represents a crucial piece of infrastructure for water resource management and conservation efforts in the area, contributing to the overall ecological health of the West Branch of the Farmington River.
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 Lemanquais Pnd Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| West Branch Farmington River Near New Boston | 59 cfs | → |
| Still River At Robertsville | 72 cfs | → |
| West Branch Farmington River At Riverton | 137 cfs | → |
| Hubbard River Nr. West Hartland | 14 cfs | → |
| Housatonic River Nr Ashley Falls | 563 cfs | → |
| Housatonic River At Falls Village | 703 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Lemanquais Pnd Dam.
Boat launches
- Howells Pond
- Wood Creek Pond Boat Launch
- Highland Lake
- Main Road, Tolland
- Winchester Lake
- West Hill Pond Boat Launch
Campgrounds
- Granville State Forest
- White Pines Campsites
- Haws Memorial - American Legion State Forest
- James Stocking Youth Group Camping Area
- Tolland State Forest
- Roaring Brook Camp Area
Fishing spots
- Great Brook Reservoir
- Lower Fulton Park Pond
- Lake Quassapaug
- Papermill Pond
- Seymour Reservoir Number 4
- Reservoir Number 2
Paddle runs
- The Hartland Headwaters To The Confluence With The Salmon Brook Main Stem
- The Massachusetts-Connecticut State Line In Hartland To The Confluence With The Salmon Brook Main Stem
- The Massachusetts-Connecticut Border To Falls Mountain Road In Canaan, Connecticut
- New Hartford/Canton Town Line To The Confluence With The Nepaug River
- The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
- The Confluence Of The East And West Branches To The Confluence With The Farmington River In East Granby
Track Lemanquais Pnd 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 Lemanquais Pnd Dam
Where does the data for Lemanquais Pnd 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 Lemanquais Pnd Dam.