Halls Pond Dam dam
Halls Pond Dam
Halls Pond Dam, located in Tolland, Connecticut, is a historic masonry dam completed in 1920 with a primary purpose of recreation. The dam stands at a height of 22 feet and has a length of 633 feet, creating a reservoir with a storage capacity of 216 acre-feet. The dam is situated on Conant Brook and is owned and regulated by a private entity, with oversight from the Connecticut Department of Energy and Environmental Protection (DEEP).
Despite being categorized with a significant hazard potential, the dam is currently assessed to be in fair condition as of the last inspection in October 2014. The dam has a spillway width of 33 feet and a maximum discharge capacity of 273 cubic feet per second. While no major modifications have been reported in recent years, regular inspections are conducted every 5 years to ensure its structural integrity and compliance with state regulations. Additionally, emergency action plans are being prepared and updated to meet safety guidelines.
For water resource and climate enthusiasts, Halls Pond Dam presents a unique opportunity to explore the intersection of historical infrastructure, recreational use, and environmental protection. With its picturesque location and rich history, the dam serves as a reminder of the importance of proper maintenance and regulation to ensure the safety and sustainability of our water resources in the face of changing climate conditions.
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 Halls Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Mount Hope River Near Warrenville | 40 cfs | → |
| Willimantic River Near Coventry | 160 cfs | → |
| Natchaug River At Willimantic | 231 cfs | → |
| Shetucket River Near Willimantic | 504 cfs | → |
| Broad Brook At Broad Brook | 22 cfs | → |
| Hockanum River Near East Hartford | 83 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Halls Pond Dam.
Boat launches
- Coventry Lake
- Bolton Lake (Lower)
- Mansfield Hollow Dam
- Wilbur Cross Highway Union
- Mono Pond
- Beaver Brook Pond
Campgrounds
- Wilderness Lake Campground
- Brialee
- Beech Grove 5
- Highland Campground
- Primitve Camping Area
- Laurel Lock Camp
Fishing spots
- Trout Hatchery
- Lake Washington Fishing Area
- Baker Cove
- Twotree Island Channel
- Mumford Cove
- Great Brook Reservoir
Paddle runs
- Begins Below The Tailrace Of The Rainbow Dam To The Confluence With The Connecticut River
- The Confluence Of The East And West Branches To The Confluence With The Farmington River In East Granby
- The Massachusetts-Connecticut State Line In Hartland To The Confluence With The Salmon Brook Main Stem
- The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
- Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
- The Hartland Headwaters To The Confluence With The Salmon Brook Main Stem
Track Halls Pond 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 Halls Pond Dam
Where does the data for Halls Pond 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 Halls Pond Dam.