Pit No. 3 Diversion Dam

Pit No. 3 Diversion Dam Quick Facts

Location: Shasta, California
Coordinates: 41.021552, -121.675562
River: Pit River
Primary Purpose: Hydroelectric
Type: Concrete Arch
Commissioned: 1925
Dam Height: 135 ft (41 m)
Dam Length: 494 ft (151 m)
Dam Capacity: 41,907 acre-ft (51,691 Ml)
Condition Assessment: Not Available
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Pit No. 3 Diversion Dam Map

Pit No. 3 Diversion Dam Information

Pit No. 3 Diversion Dam is a concrete arch dam located about 12 miles from Big Bend, Shasta, California.

The dam, which is on the Pit River, was primarily built for Hydroelectric purposes, but also serves for benefits.

The dam was designed by and commissioned in 1925 and is currently owned by Pacific Gas and Electric Company.

Pit No. 3 Diversion Dam Structure

The Pit No. 3 Diversion Dam is approximately 494 feet (151 m) long, 135 feet (41 m) high and has a structural volume of cubic yards (0 cubic metres).

Pit No. 3 Diversion Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 41,000 acre-ft (50,573 Ml) and maximum capacity of 41,907 acre-ft (51,691 Ml).

The surface area of the reservoir is 1,293 acres (523 ha) and the total catchment area is 4,606 square miles (11,929 square kilometres).

Pit No. 3 Diversion Dam Spillway

The dam has a 254 feet (77 m) wide controlled spillway with a maximum discharge capacity of 70000 cubic feet per second (1982 cubic metres per second).

Pit No. 3 Diversion Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Pit No. 3 Diversion Dam
Shasta, California
Height (ft)
135
Length (Ft)
494
Storage Volume (acre-ft)
41,907
Drainage Area (sq miles)
4,606
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

Pit No. 3 Diversion Dam Weather

Current Conditions at Pit No. 3 Diversion Dam

Parameter Value
Current Time 18:02
Sunrise 06:51
Sunset 16:50
Temperature (°F) 39
Feels Like (°F) 37
Cloud Coverage (%) 100
Pressure (inHg) 1022
Humidity (%) 87
Wind Speed (mph) 3
Rain (mm) 0

7-Day Forecast for Pit No. 3 Diversion 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 44 1024 77 5 9 WSW 20 0 light rain
Wed 37 43 35 1015 96 10 35 SW 100 15 rain and snow
Thu 36 44 41 1018 92 7 20 WSW 100 4 light rain
Fri 29 42 40 1014 81 4 9 NE 43 0 rain and snow
Sat 25 44 31 1021 76 5 8 ENE 0 - broken clouds
Sun 29 43 40 1018 61 4 7 W 20 0 light rain
Mon 25 41 37 1020 69 8 15 W 100 0 rain and snow
Tue 23 43 30 1032 70 6 11 ENE 0 - broken clouds

Pit No. 3 Diversion Dam Frequently Asked Questions

In which state is the Pit No. 3 Diversion Dam?

Pit No. 3 Diversion Dam is in California.

In which county is the Pit No. 3 Diversion Dam?

Pit No. 3 Diversion Dam is in Shasta County.

How high is the Pit No. 3 Diversion Dam?

Pit No. 3 Diversion Dam is 135 feet high.

How long is the Pit No. 3 Diversion Dam?

Pit No. 3 Diversion Dam is 494 feet long.

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More Dams in Shasta County:

Haynes Reservoir Dam
Iron Canyon Dam
Keswick Dam
Mccloud Dam
Pit No. 3 Diversion Dam
Pit No. 6 Diversion Dam
Pit No. 7 Diversion Dam
Shasta Dam
Spring Creek Debris Dam
Whiskeytown 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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