Dolby Dam

Dolby Dam Quick Facts

Location: Penobscot, Maine
Coordinates: 45.6327, -68.6067
River: West Branch Penobscot River
Primary Purpose: Hydroelectric
Type: Concrete Earth Gravity
Commissioned: 1906
Dam Height: 66 ft (20 m)
Dam Length: 1,395 ft (425 m)
Dam Capacity: 41,956 acre-ft (51,752 Ml)
Condition Assessment: Satisfactory
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Dolby Dam Map

Dolby Dam Information

Dolby Dam is a concrete earth gravity dam located about 2 miles from East Millinocket, Penobscot, Maine.

The dam, which is on the West Branch Penobscot River, was primarily built for Hydroelectric purposes, but also serves for Navigation, Fish and Wildlife Pond, Recreation, Water Supply and Flood Risk Reduction benefits.

The dam was designed by and commissioned in 1906 and is currently owned by .

Dolby Dam Structure

The Dolby Dam is approximately 1,395 feet (425 m) long, 66 feet (20 m) high and has a structural volume of cubic yards (0 cubic metres).

Dolby Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 41,956 acre-ft (51,752 Ml) and maximum capacity of 41,956 acre-ft (51,752 Ml).

The surface area of the reservoir is 2,048 acres (829 ha) and the total catchment area is 2,108 square miles (5,460 square kilometres).

Dolby Dam Spillway

The dam has a 521 feet (159 m) wide controlled spillway with a maximum discharge capacity of 75000 cubic feet per second (2124 cubic metres per second).

Dolby Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Dolby Dam
Penobscot, Maine
Height (ft)
66
Length (Ft)
1,395
Storage Volume (acre-ft)
41,956
Drainage Area (sq miles)
2,108
Hoover Dam
Clark County, Nevada
Height (ft)
730
Length (Ft)
1,244
Storage Volume (acre-ft)
30,237,000
Drainage Area (sq miles)
167,800
Grand Coulee Dam
Okanogan County, Washington
Height (ft)
550
Length (Ft)
5,673
Storage Volume (acre-ft)
9,562,0000
Drainage Area (sq miles)
74,100
Theodore Roosevelt Dam
Maricopa County, Arizona
Height (ft)
357
Length (Ft)
1,208
Storage Volume (acre-ft)
3,411,500
Drainage Area (sq miles)
5,736
Oroville Dam
Butte County, California
Height (ft)
235
Length (Ft)
6,920
Storage Volume (acre-ft)
3,540,000
Drainage Area (sq miles)
3,611
Glen Canyon Dam
Coconino County, Arizona
Height (ft)
216
Length (Ft)
1,565
Storage Volume (acre-ft)
29,875,000
Drainage Area (sq miles)
108,355

Dolby Dam Weather

Current Conditions at Dolby Dam

Parameter Value
Current Time 21:05
Sunrise 07:06
Sunset 16:24
Temperature (°F) 2
Feels Like (°F) 2
Cloud Coverage (%) 0
Pressure (inHg) 1030
Humidity (%) 71
Wind Speed (mph) 0
Rain (mm) 0

7-Day Forecast for Dolby 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 2 15 0 1028 51 12 23 WSW 0 - broken clouds
Wed 1 14 4 1030 51 7 13 WNW 0 - clear sky
Thu 6 21 7 1025 51 10 25 SSW 54 - light snow
Fri 9 25 15 1015 61 10 22 WNW 0 - few clouds
Sat 8 22 8 1024 60 7 20 WSW 0 - clear sky
Sun 15 31 14 1013 69 13 29 W 20 - light snow
Mon 13 28 15 1010 79 9 30 SSW 100 - light snow
Tue -0 30 20 996 62 15 27 WNW 100 - light snow

Dolby Dam Frequently Asked Questions

In which state is the Dolby Dam?

Dolby Dam is in Maine.

In which county is the Dolby Dam?

Dolby Dam is in Penobscot County.

How high is the Dolby Dam?

Dolby Dam is 66 feet high.

How long is the Dolby Dam?

Dolby Dam is 1,395 feet long.

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More Dams in Penobscot County:

Cold Stream Pond Dam
Dolby Dam
Grand Lake (Matagamon) Dam
Mattaceunk Dam
Millinocket Lake Dam
North Twin Dam
Pushaw Lake Dam
Sebasticook Dam
Stone Dam
Wassookeag Lake Dam
West Enfield 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

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