Hoadley Pond Dam dam
Hoadley Pond Dam
Hoadley Pond Dam, located in Seymour, Connecticut, is a historic masonry dam completed in 1873 with a primary purpose of water supply. This dam, situated on the Little River, stands at a height of 19 feet and has a storage capacity of 70 acre-feet. With a surface area of 7.8 acres and a drainage area of 15.2 square miles, Hoadley Pond Dam plays a crucial role in water resource management in the region.
Managed by a public utility and regulated by the Connecticut Department of Energy and Environmental Protection (DEEP), Hoadley Pond Dam is inspected regularly to ensure its structural integrity and safety. The dam has a significant hazard potential but has been assessed as satisfactory in condition as of the last inspection in June 2019. With a spillway width of 67 feet and a maximum discharge capacity of 2300 cubic feet per second, the dam is equipped to handle high water flows and mitigate flood risks in the area.
Enthusiasts of water resources and climate change will find Hoadley Pond Dam to be a fascinating example of historic engineering for water supply purposes. Its location on the Little River, its significant storage capacity, and its role in flood risk management make it a vital piece of infrastructure in New Haven County, Connecticut. Ongoing inspections and safety measures ensure that Hoadley Pond Dam continues to serve its purpose effectively and safely in the face of changing 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 Hoadley Pond Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Naugatuck River At Beacon Falls | 814 cfs | → |
| Housatonic River At Stevenson | 495 cfs | → |
| Pomperaug River At Southbury | 153 cfs | → |
| Mill R Nr Hamden | 54 cfs | → |
| Pootatuck R At Sandy Hook | 43 cfs | → |
| Weekeepeemee River At Hotchkissville | 33 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Hoadley Pond Dam.
Boat launches
- Lake Housatonic
- Main Street Hamden
- Lake Zoar
- Huntington Street Shelton
- Sackett Point Road North Haven
- Quinnipiac River Front St Boat Ramp
Campgrounds
Fishing spots
- Carrington Pond
- Seymour Reservoir Number 1
- Reservoir Number 1
- Seymour Reservoir Number 2
- Fountain Lake Reservoir
- Reservoir Number 2
Paddle runs
- Begins Downstream Of The Borough Of Bantam, At Stoddard Road Bridge To The Confluence With The Shepaug River
- Pond Downstream Of Shepaug Reservoir Dam, Marked By Service Road Bridge To Ends In Backwaters Of Lake Lillinonah, Near Roxbury Falls
- Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
- Kent Bridge To Boardman 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
Track Hoadley 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 Hoadley Pond Dam
Where does the data for Hoadley 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 Hoadley Pond Dam.