Mallard Lake Dam Dam
Mallard Lake Dam
Mallard Lake Dam, located in North Stamford, Connecticut, is a privately owned structure that serves as a recreational area along the TR-RIPPONAN River. Built in 1939, this masonry dam stands at 11 feet tall and spans 300 feet in length, providing a storage capacity of 100 acre-feet. While primarily used for recreational purposes, the dam also helps regulate water flow and maintain the surrounding ecosystem.
Managed by the New York State Department of Environmental Conservation (NYS DEC), Mallard Lake Dam has been inspected and regulated to ensure its safety and compliance with state standards. With a low hazard potential and a moderate risk assessment rating, the dam is considered to be in satisfactory condition, although it has not been formally rated. The spillway, with a width of 10 feet, is uncontrolled, allowing excess water to flow freely in times of high discharge, minimizing the risk of overflow and potential downstream flooding.
Despite its age, Mallard Lake Dam continues to provide valuable recreational opportunities and support the local environment. As a significant piece of infrastructure in the region, it is essential for water resource and climate enthusiasts to appreciate the role this dam plays in maintaining the balance of the TR-RIPPONAN River ecosystem and the surrounding community.
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 Mallard Lake Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Fivemile River Near New Canaan | 0 cfs | → |
| Cross River Near Cross River Ny | 10 cfs | → |
| Cross River At Katonah Ny | 11 cfs | → |
| Rippowam River At Stamford | 5 cfs | → |
| Norwalk R At South Wilton | 13 cfs | → |
| Ridgefield Brook At Shields Lane Nr Ridgefield | 3 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Mallard Lake Dam.
Boat launches
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Campgrounds
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Fishing spots
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River runs
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More reservoirs
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About Mallard Lake Dam
Where does the data for Mallard 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 Low 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 below 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.
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.