Clear Lake Dam

Clear Lake Dam Quick Facts

Location: Modoc, California
Coordinates: 41.9257, -121.0757
River: Lost River
Primary Purpose: Irrigation
Type: Gravity Roller-Compacted Concrete
Commissioned: 1910
Dam Height: 42 ft (13 m)
Dam Length: 564 ft (172 m)
Dam Capacity: 584,050 acre-ft (720,414 Ml)
Condition Assessment: Not Available
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Clear Lake Dam Map

Clear Lake Dam Information

Clear Lake Dam is a gravity roller-compacted concrete dam located in Modoc County, California.

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

The dam was designed by US Bureau of Reclamation and commissioned in 1910 and is currently owned by US Bureau of Reclamation.

Clear Lake Dam Structure

The Clear Lake Dam is approximately 564 feet (172 m) long, 42 feet (13 m) high and has a structural volume of 18,000 cubic yards (13,762 cubic metres).

Clear Lake Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 374,080 acre-ft (461,420 Ml) and maximum capacity of 584,050 acre-ft (720,414 Ml).

The surface area of the reservoir is 23,960 acres (9,696 ha) and the total catchment area is 735 square miles (1,904 square kilometres).

Clear Lake Dam Spillway

The dam has a 357 feet (109 m) wide controlled spillway with a maximum discharge capacity of 0 cubic feet per second (0 cubic metres per second).

Clear Lake Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Clear Lake Dam
Modoc, California
Height (ft)
42
Length (Ft)
564
Storage Volume (acre-ft)
584,050
Drainage Area (sq miles)
735
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

Clear Lake Dam Weather

Current Conditions at Clear Lake Dam

Parameter Value
Current Time 18:56
Sunrise 06:43
Sunset 16:52
Temperature (°F) 33
Feels Like (°F) 25
Cloud Coverage (%) 0
Pressure (inHg) 1026
Humidity (%) 36
Wind Speed (mph) 9
Rain (mm) 0

7-Day Forecast for Clear Lake 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 26 49 39 1026 31 11 14 E 0 - clear sky
Thu 30 56 50 1024 22 6 6 ESE 0 - clear sky
Fri 36 62 52 1020 30 8 8 SE 0 - clear sky
Sat 40 56 50 1012 28 19 31 SSW 0 - overcast clouds
Sun 36 48 35 1017 77 18 32 S 100 1 light rain
Mon 33 43 30 1010 87 25 40 SSW 100 1 rain and snow
Tue 28 38 27 1019 77 19 26 W 100 - light snow
Wed 27 46 33 1024 55 15 19 SE 0 - overcast clouds

Clear Lake Dam Frequently Asked Questions

In which state is the Clear Lake Dam?

Clear Lake Dam is in California.

In which county is the Clear Lake Dam?

Clear Lake Dam is in Modoc County.

How high is the Clear Lake Dam?

Clear Lake Dam is 42 feet high.

How long is the Clear Lake Dam?

Clear Lake Dam is 564 feet long.

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More Dams in Modoc County:

Big Dobe North Dam
Big Sage Dam
Clear Lake Dam
Dorris Dam
Poison Springs Dam
Roberts Dam
West Valley 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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