Green Peter Dam

Green Peter Dam Quick Facts

Location: Linn, Oregon
Coordinates: 44.450063, -122.548848
River: Middle Santiam River
Primary Purpose: Flood Risk Reduction
Type: Gravity
Commissioned: 1967
Dam Height: 320 ft (98 m)
Dam Length: 1,517 ft (462 m)
Dam Capacity: 430,000 acre-ft (530,396 Ml)
Condition Assessment: Not Available
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Green Peter Dam Map

Green Peter Dam Information

Green Peter Dam is a gravity dam located in Sweethome, Linn, Oregon.

The dam, which is on the Middle Santiam River, was primarily built for Flood Risk Reduction purposes, but also serves for Irrigation, Navigation, Recreation and Hydroelectric benefits.

The dam was designed by CENWP and commissioned in 1967 and is currently owned by USACE – Portland District.

Green Peter Dam Structure

The Green Peter Dam is approximately 1,517 feet (462 m) long, 320 feet (98 m) high and has a structural volume of 1,142,000 cubic yards (873,122 cubic metres).

Green Peter Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 160,000 acre-ft (197,357 Ml) and maximum capacity of 430,000 acre-ft (530,396 Ml).

The surface area of the reservoir is 3,720 acres (1,505 ha) and the total catchment area is 277 square miles (717 square kilometres).

Green Peter Dam Spillway

The dam has a 100 feet (30 m) wide controlled spillway with a maximum discharge capacity of 110000 cubic feet per second (3115 cubic metres per second).

Green Peter Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Green Peter Dam
Linn, Oregon
Height (ft)
320
Length (Ft)
1,517
Storage Volume (acre-ft)
430,000
Drainage Area (sq miles)
277
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

Green Peter Dam Weather

Current Conditions at Green Peter Dam

Parameter Value
Current Time 17:54
Sunrise 07:03
Sunset 16:45
Temperature (°F) 46
Feels Like (°F) 43
Cloud Coverage (%) 100
Pressure (inHg) 1016
Humidity (%) 92
Wind Speed (mph) 7
Rain (mm) 1

7-Day Forecast for Green Peter 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 38 46 38 1020 93 9 27 SE 100 6 light rain
Wed 40 44 37 1007 95 10 33 S 100 19 moderate rain
Thu 34 41 35 1017 98 11 29 SSW 100 23 rain and snow
Fri 29 40 39 1018 80 4 7 WNW 20 0 light rain
Sat 26 43 37 1020 69 5 8 E 100 1 light rain
Sun 33 38 34 1014 100 6 16 ESE 100 24 rain and snow
Mon 29 33 28 1018 100 5 13 SW 100 - snow
Tue 27 38 32 1032 93 5 7 E 95 - light snow

Green Peter Dam Frequently Asked Questions

In which state is the Green Peter Dam?

Green Peter Dam is in Oregon.

In which county is the Green Peter Dam?

Green Peter Dam is in Linn County.

How high is the Green Peter Dam?

Green Peter Dam is 320 feet high.

How long is the Green Peter Dam?

Green Peter Dam is 1,517 feet long.

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More Dams in Linn County:

Cedar Rapids Milldam (5 In 1)
Critzer Dam
Detroit Dam
Foster Dam
Green Peter Dam
Lacygne Lake Dam
Pleasant Creek Lake Dam
Smith 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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