Hallmere Reservoir Dam dam
Hallmere Reservoir Dam
Hallmere Reservoir Dam, located in Kensington, Connecticut, is a vital water supply infrastructure owned by the local government. Built in 1897, this earth dam stands at a height of 45 feet and spans a length of 600 feet, with a storage capacity of 585 acre-feet. The reservoir covers an area of 18.4 acres and is fed by the John Hall Brook, serving as a crucial source of water for the region.
Maintained and regulated by the Connecticut Department of Energy and Environmental Protection (DEEP), Hallmere Reservoir Dam is classified as having a high hazard potential but is currently in satisfactory condition according to a 2015 assessment. The dam has a spillway width of 30 feet and a maximum discharge capacity of 1470 cubic feet per second, ensuring effective flood control measures. Despite its age, the dam undergoes regular inspections every two years to ensure its structural integrity and safety.
With its rich history dating back over a century and its strategic importance in water resource management, Hallmere Reservoir Dam serves as a testament to the enduring legacy of infrastructure projects in sustaining communities and ecosystems. As climate change poses new challenges to water availability and quality, the continued operation and maintenance of dams like Hallmere Reservoir Dam are essential in ensuring the resilience of our water supply systems in the face of evolving environmental 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 Hallmere Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Quinnipiac River At Southington | 12 cfs | → |
| Coginchaug River At Middlefield | 18 cfs | → |
| Quinnipiac River At Wallingford | 94 cfs | → |
| Mill R Nr Hamden | 19 cfs | → |
| Farmington River At Unionville | 310 cfs | → |
| Connecticut R At Middle Haddam | 43,500 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hallmere Reservoir Dam.
Boat launches
Campgrounds
Fishing spots
- Great Brook Reservoir
- Lower Fulton Park Pond
- Seymour Reservoir Number 4
- Reservoir Number 2
- Seymour Reservoir Number 2
- Reservoir Number 1
Paddle runs
- Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
- The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
- New Hartford/Canton Town Line To The Confluence With The Nepaug River
- Begins Downstream Of The Borough Of Bantam, At Stoddard Road Bridge To The Confluence With The Shepaug River
- 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
Track Hallmere Reservoir 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 Hallmere Reservoir Dam
Where does the data for Hallmere Reservoir 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 High 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 Hallmere Reservoir Dam.