Siscowit Reservoir Dam dam
Siscowit Reservoir Dam
Siscowit Reservoir Dam, located in Fairfield, Connecticut, serves as a crucial water supply source for the city of New Canaan. Built in 1865, this earth dam stands at a height of 6 feet and stretches 95 feet in length, with a storage capacity of 270 acre-feet. The dam is situated on the Rippowam River and is regulated by the Connecticut Department of Energy and Environmental Protection (DEEP).
With a significant hazard potential, the dam has been assessed to be in satisfactory condition as of the last inspection in October 2017. The dam's spillway width of 90 feet ensures proper water flow management, while its location in a high-risk area highlights the importance of ongoing monitoring and maintenance. Despite its age, the Siscowit Reservoir Dam continues to play a vital role in providing safe and reliable water resources to the surrounding community.
Climate and water resource enthusiasts will find the Siscowit Reservoir Dam's history and engineering details intriguing, as it represents a lasting example of early infrastructure development in the region. Its presence on the Rippowam River underscores the interconnectedness of water management and environmental conservation efforts in Connecticut, making it a noteworthy site for those interested in sustainable water resource management practices.
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 Siscowit Reservoir Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Fivemile River Near New Canaan | 0 cfs | → |
| Norwalk R At South Wilton | 10 cfs | → |
| Cross River Near Cross River Ny | 8 cfs | → |
| Saugatuck R Nr Westport | 18 cfs | → |
| Ridgefield Brook At Shields Lane Nr Ridgefield | 2 cfs | → |
| Rippowam River At Stamford | 7 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Siscowit Reservoir Dam.
Boat launches
- Maple Way 10, Town Of North Castle
- Saugatuck River
- Roosevelt Road Westport
- Hillspoint Road Westport
- Seagate Road 3, Greenwich
- Lake Kenosia
Campgrounds
- Ward Pound Ridge Reservation
- Mountain Lakes Park
- Youth Camp Ii
- Youth Camp Iii
- Youth Camp I
- Croton Point Park
Fishing spots
Paddle runs
- Kent Bridge To Boardman Bridge
- Pond Downstream Of Shepaug Reservoir Dam, Marked By Service Road Bridge To Ends In Backwaters Of Lake Lillinonah, Near Roxbury Falls
- Begins Downstream Of The Borough Of Bantam, At Stoddard Road Bridge To The Confluence With The Shepaug River
- Begins Below The Tailrace Of The Lower Collinsville Dam To The Route 187 Bridge
- Falls Mountain Road In Canaan, Connecticut To Kent Bridge
- The Confluence With The Nepaug River To A Point 0.2 Miles Below The Lower Collinsville Dam Tailrace
Track Siscowit 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 Siscowit Reservoir Dam
Where does the data for Siscowit 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 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 Siscowit Reservoir Dam.