Shadow Lake Dam dam
Shadow Lake Dam
Shadow Lake Dam, also known as Mallorys Pond, is a local government-owned structure located in Ridgefield, Connecticut. Built in 1937, this earth dam stands at a height of 25 feet and spans 410 feet in length, providing recreational opportunities in the area. The dam has a storage capacity of 80 acre-feet, with a normal storage level of 69 acre-feet, covering a surface area of 7 acres and draining a watershed area of 0.43 square miles.
Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), Shadow Lake Dam is regulated by the state and undergoes regular inspections to ensure its safety. The dam has an uncontrolled spillway type with a width of 30 feet and a significant hazard potential, although its condition assessment is fair as of the last inspection in April 2020. With a moderate risk rating, the dam is equipped with emergency action plans to mitigate any potential risks and meet safety guidelines.
Located along a tributary to Miry Brook, Shadow Lake Dam serves as a vital structure for water resource management and flood control in the region. Its presence not only offers recreational benefits to the community but also highlights the importance of maintaining and monitoring dam infrastructure to ensure public safety and environmental sustainability 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 Shadow Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ridgefield Brook At Shields Lane Nr Ridgefield | 3 cfs | → |
| East Branch Croton River At Brewster Ny | 56 cfs | → |
| East Branch Croton River Near Putnam Lake Ny | 49 cfs | → |
| East Branch Croton River Near Croton Falls Ny | 51 cfs | → |
| Saugatuck River Near Redding | 14 cfs | → |
| Titicus River At Purdys Station Ny | 15 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Shadow Lake Dam.
Boat launches
- Lake Kenosia
- Danbury Boat Launch
- Candlewood Lake (Lattins Cove)
- Old Bogus Road 4, New Fairfield
- Squantz Pond
- Lake Lillinonah
Campgrounds
- Mountain Lakes Park
- Youth Camp I
- Youth Camp Ii
- Youth Camp Iii
- Ward Pound Ridge Reservation
- Kettletown State 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
- Falls Mountain Road In Canaan, Connecticut To Kent Bridge
- 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
Track Shadow Lake 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 Shadow Lake Dam
Where does the data for Shadow Lake 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 Shadow Lake Dam.