Half Moon Pond dam
Half Moon Pond
Half Moon Pond, located in Waldo, Maine, is a concrete dam primarily used for water supply purposes. With a height of 10 feet and a storage capacity of 880 acre-feet, this structure plays a crucial role in ensuring the availability of water in the area. Despite its relatively low hazard potential, the dam is subject to state regulation, inspection, and enforcement by MEMA, highlighting the importance of maintaining its integrity and functionality.
The dam, situated on the Halfmoon Pond stream, was last inspected in August 1997, with a scheduled inspection frequency of 12 years. While its condition assessment is currently listed as "Not Rated," the structure's emergency action plan (EAP) status and risk assessment details are not available. Nevertheless, Half Moon Pond Dam continues to serve as a vital resource for the region, contributing to the water management efforts in the area.
Managed by a public utility, Half Moon Pond Dam stands as a testament to the collaboration between state and federal agencies in safeguarding water resources. Its modest dimensions of 30 feet in length and 176 acres in surface area belie its significance in the local ecosystem. With its controlled spillway width of 4 feet and strategic location within the New England District, the dam represents a harmonious balance between water supply needs and environmental conservation in the region.
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 Half Moon Pond -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Ducktrap River Near Lincolnville | 45 cfs | → |
| Kenduskeag Stream Near Bangor | 344 cfs | → |
| Kennebec River At North Sidney | 15,100 cfs | → |
| Sheepscot River At North Whitefield | 434 cfs | → |
| West Br Bear Brook Near Beddington | 1 cfs | → |
| East Br Bear Brook Near Beddington | 0 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Half Moon Pond .
Boat launches
- Craig Pond Trail 79, Orland
- Acadia Highway 1117, East Orland
- Water Street, Castine
- Snowmobile Trail 7c Holden Holden
- Prairie Road 21, Unity
- Little Deer Isle Road 204, Deer Isle
Campgrounds
- Balsam Cove Campground
- Paul Bunyan Campground
- Cold River Campground
- Camden Hills State Park
- Lake St. George State Park
- Star Rock Campsite
More reservoirs
Track Half Moon Pond 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 Half Moon Pond
Where does the data for Half Moon Pond 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 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 Half Moon Pond .