Upper Dam Quick Facts
Upper Dam Map
Upper Dam Information
Upper Dam is a concrete earth gravity dam located about 11 miles from Errol, Oxford, Maine.
The dam, which is on the Rapid River, was primarily built for Hydroelectric purposes, but also serves for benefits.
The dam was designed by and commissioned in 1883 and is currently owned by Brookfield Renewable Power LLC NYRO.
Upper Dam Structure
The Upper Dam is approximately 1,500 feet (457 m) long, 25 feet (8 m) high and has a structural volume of cubic yards (0 cubic metres).
Upper Dam Storage Capacity & Surface Area
The reservoir has a normal storage capacity of 192,039 acre-ft (236,876 Ml) and maximum capacity of 192,039 acre-ft (236,876 Ml).
The surface area of the reservoir is 15,741 acres (6,370 ha) and the total catchment area is 382 square miles (989 square kilometres).
Upper Dam Spillway
The dam spillway has a maximum discharge capacity of 22754 cubic feet per second (644 cubic metres per second).
Upper Dam Compared to Five Famous American Dams
Upper Dam Weather
Current Conditions at Upper Dam
| Parameter | Value |
|---|---|
| Current Time | 01:13 |
| Sunrise | 07:00 |
| Sunset | 17:56 |
| Temperature (°F) | 33 |
| Feels Like (°F) | 26 |
| Cloud Coverage (%) | 100 |
| Pressure (inHg) | 1004 |
| Humidity (%) | 97 |
| Wind Speed (mph) | 9 |
| Rain (mm) | 0 |
7-Day Forecast for Upper Dam
| Day | Min Temp (°F) | Max Temp (°F) | Feels Like (°F) | Pressure (inHg) | Humidity (%) | Wind Speed (mph) | Wind Gust (mph) | Wind Dir | Precip Prob (%) | Precip Volume (mm) | Weather |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Today | 28 | 38 | 26 | 1013 | 88 | 13 | 25 | WNW | 100 | - |  |
| Thu | 27 | 48 | 44 | 1024 | 53 | 6 | 9 | NW | 0 | - |  |
| Fri | 31 | 54 | 50 | 1031 | 47 | 5 | 6 | NW | 0 | - | |
| Sat | 36 | 60 | 52 | 1033 | 45 | 6 | 11 | W | 0 | - | |
| Sun | 38 | 61 | 54 | 1027 | 49 | 8 | 13 | WNW | 0 | - | |
| Mon | 43 | 66 | 59 | 1026 | 48 | 5 | 9 | W | 0 | - | |
| Tue | 46 | 67 | 62 | 1022 | 58 | 8 | 12 | SSE | 0 | - | |
| Wed | 44 | 60 | 58 | 1011 | 61 | 14 | 28 | W | 0 | - |  |
Upper Dam Frequently Asked Questions
Upper Dam is in Maine.
Upper Dam is in Oxford County.
Upper Dam is 25 feet high.
Upper Dam is 1,500 feet long.
More Dams in Oxford County:
Anasagunticook DamAziscohos Dam
Kezar Lake Outlet Dam
Locke Mills Dam
Middle Dam
Moose Pond Storage Dam
Norway Lake Dam
Pennessewassee Stream Dam
Thompson Lake Dam
Upper Dam
Welchville Dam
More Dams in Maine:
Anasagunticook DamAnson Dam
Arnold Brook Dam
Aziscohos Dam
Bell Marsh Dam
Branch Lake Dam
Brassua Dam
Bristol Mills Dam
Bunganut Lake Dam
Burntland Dam
Canada Falls Lake Dam
Cathance Lake Dam
Caucomgomoc Lake Dam
Chase Mill Dam
Cherryfield Dam
China Lake Dam
Christina Dam
Churchill Dam
Clary Lake Dam
Clearwater Pond Dam
Clifford Dam
Cobbosseecontee Outlet Dam
Cold Stream Pond Dam
Craig Pond Dam
Crystal Lake Dam
Damariscotta - Intake Dam
Danforth Dam
Dolby Dam
Durepo Brook Dam
East Pond Dam
Eel Weir Dam
Emery Mills Dam
Estes Lake Dam
First Roach Pond Dam
Flagstaff Dam
Forest City Dam
Graham Lake Dam
Grand Falls Dam
Grand Lake (Matagamon) Dam
Great Moose Lake Dam
Great Pond Dam
Green Lake Dam
Gulf Island Dam
Harrington Lake Dam
Highland Lake Bridgton Dam
Highland Lake Westbrook Dam
Indian Pond Dam
Kezar Lake Outlet Dam
Lake Auburn Dam
Lake St George Dam
Condition Assessment Classification
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. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
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. Investigations and studies are necessary.
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.
Not Available
Dams for which the condition assessment is restricted to approved government users.
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, environment 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.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Source: National Inventory of Dams