Twin Lakes Upper Pond (Hoile Lane) dam
Twin Lakes Upper Pond (Hoile Lane)
Twin Lakes Upper Pond (Hoile Lane) is a privately owned dam located in Huntingtown, Maryland, with a primary purpose of recreation. Built in 1970, this earth dam stands at a height of 15 feet and spans a length of 290 feet, creating a storage capacity of 20 acre-feet. The pond covers a surface area of 1.2 acres and is situated in close proximity to Cocktown Creek.
The dam is classified as having a significant hazard potential, although its condition assessment as of April 2021 was deemed satisfactory. Regular inspections are conducted, with the last one taking place in August 2019. The spillway type is uncontrolled, with a width of 5 feet. While the risk assessment for Twin Lakes Upper Pond is moderate, with a score of 3, there are currently no specific risk management measures in place.
Overall, Twin Lakes Upper Pond offers a recreational oasis in Calvert County, Maryland, with its tranquil waters and scenic surroundings. Water resource and climate enthusiasts can appreciate the role this dam plays in providing recreational opportunities while also recognizing the importance of ongoing monitoring and maintenance to ensure its safety and longevity.
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 Twin Lakes Upper Pond (Hoile Lane) -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Western Branch At Upper Marlboro | 12 cfs | → |
| Piscataway Creek At Piscataway | 3 cfs | → |
| Zekiah Swamp Run Near Newtown | 2 cfs | → |
| Patuxent River Near Bowie | 107 cfs | → |
| St Clement Creek Near Clements | 1 cfs | → |
| Mattawoman Creek Near Pomonkey | 1 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Twin Lakes Upper Pond (Hoile Lane).
Boat launches
- Magruders Ferry Road 17901, Brandywine
- Branch Street Calvert County
- Critical Area Driving Tour Prince George's County
- Hallowing Point Road 6935, Calvert County
- Marlboro Road 1570, Anne Arundel County
- Gilbert Run Boat Ramp
Campgrounds
- Selby's Landing
- Cedarville State Forest
- Louise F. Cosca Regional Park
- Andrews Afb Military
- Camp Loop B
- Camp Loop A
Fishing spots
Track Twin Lakes Upper Pond (Hoile Lane) 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 Twin Lakes Upper Pond (Hoile Lane)
Where does the data for Twin Lakes Upper Pond (Hoile Lane) 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 Twin Lakes Upper Pond (Hoile Lane).