Crossing At Lisbon Detention Dam dam
Crossing At Lisbon Detention Dam
The Crossing At Lisbon Detention Dam, located in Griswold, Connecticut, is a vital structure designed for flood risk reduction along the I-395 Drainage Quinebaug River. Completed in 2008, this privately owned earth dam stands at a height of 16 feet and spans 290 feet in length, with a controlled spillway width of 15 feet. The dam's primary purpose is to mitigate flood risks in the area, making it a crucial component of water resource management in New London County.
Managed by the Connecticut Department of Energy and Environmental Protection (DEEP), the Crossing At Lisbon Detention Dam has a significant hazard potential and is subject to regular inspections to ensure its structural integrity. Despite its satisfactory condition assessment as of April 2016, the dam's risk assessment categorizes it as very high (1), highlighting the importance of ongoing risk management measures. With a history of state regulation, permitting, and enforcement, this dam plays a crucial role in protecting the surrounding community from potential flooding events, emphasizing the intersection of water resource management and climate resilience in the region.
As a key component of the New England District's flood risk reduction infrastructure, the Crossing At Lisbon Detention Dam serves as a model for effective water resource management and emergency preparedness. With a robust emergency action plan in place and a commitment to meeting regulatory guidelines, this earth dam represents a proactive approach to mitigating the impacts of climate change on local water systems. Its strategic location in Lisbon, Connecticut, and close oversight by state agencies ensure that it continues to safeguard the community and surrounding areas from the threat of flooding, making it a critical asset in the region's water resource and climate resilience efforts.
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 Crossing At Lisbon Detention Dam -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Quinebaug River At Jewett City | 766 cfs | → |
| Shetucket River At Taftville | 631 cfs | → |
| Little River Near Hanover | 29 cfs | → |
| Yantic River At Yantic | 78 cfs | → |
| Pendleton Hill Brook Near Clarks Falls | 4 cfs | → |
| Shetucket River Near Willimantic | 504 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Crossing At Lisbon Detention Dam.
Boat launches
- Jeffrey Lane Griswold
- Butts Bridge Road Canterbury
- Amos Lake
- Glasgo Pond State Boat Launch
- Beachdale Pond
- Lovell Lane 50, Canterbury
Campgrounds
- Highland Campground
- Laurel Lock Camp
- Mystic Koa Holiday
- Dyer Woods Nudist Campgrounds
- Youth Site 1
- Youth Site 2
Fishing spots
Paddle runs
- 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
- 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
- The Massachusetts-Connecticut State Line In Hartland To The Confluence With The Salmon Brook Main Stem
Track Crossing At Lisbon Detention 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 Crossing At Lisbon Detention Dam
Where does the data for Crossing At Lisbon Detention 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 Crossing At Lisbon Detention Dam.