Olmos Dam

Olmos Dam Quick Facts

Location: Bexar, Texas
Coordinates: 29.473497, -98.474142
River: Olmos Creek River
Primary Purpose: Flood Risk Reduction
Type: Gravity
Commissioned: 1926
Dam Height: 58 ft (18 m)
Dam Length: 1,941 ft (592 m)
Dam Capacity: 21,970 acre-ft (27,100 Ml)
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Olmos Dam Map

Olmos Dam Information

Olmos Dam is a gravity dam located in San Antonio, Bexar, Texas.

The dam, which is on the Olmos Creek River, was primarily built for Flood Risk Reduction purposes, but also serves for benefits.

The dam was designed by FREESE & NICHOLS;NO DATA FOR ORIGINAL DESIGNER and commissioned in 1926 and is currently owned by CITY OF SAN ANTONIO.

Olmos Dam Structure

The Olmos Dam is approximately 1,941 feet (592 m) long, 58 feet (18 m) high and has a structural volume of cubic yards (0 cubic metres).

Olmos Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 15,551 acre-ft (19,182 Ml) and maximum capacity of 21,970 acre-ft (27,100 Ml).

The surface area of the reservoir is 0 acres (0 ha) and the total catchment area is 32 square miles (84 square kilometres).

Olmos Dam Spillway

The dam spillway has a maximum discharge capacity of 74326 cubic feet per second (2105 cubic metres per second).

Olmos Dam Compared to Five Famous American Dams

Height (ft)
Length (Ft)
Storage Volume (acre-ft)
Drainage Area (sq miles)
 
Olmos Dam
Bexar, Texas
Height (ft)
58
Length (Ft)
1,941
Storage Volume (acre-ft)
21,970
Drainage Area (sq miles)
32
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

Olmos Dam Weather

Current Conditions at Olmos Dam

Parameter Value
Current Time 19:35
Sunrise 06:56
Sunset 17:40
Temperature (°F) 73
Feels Like (°F) 74
Cloud Coverage (%) 20
Pressure (inHg) 1012
Humidity (%) 71
Wind Speed (mph) 6
Rain (mm) 0

7-Day Forecast for Olmos 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 66 81 79 1014 60 10 19 SSE 0 - few clouds
Wed 64 85 79 1015 55 15 30 N 0 - overcast clouds
Thu 57 76 71 1020 26 9 23 NNE 0 - clear sky
Fri 54 77 70 1017 27 10 26 SE 0 - clear sky
Sat 57 80 75 1014 49 11 27 SE 0 - scattered clouds
Sun 62 83 78 1013 54 14 28 SE 0 - broken clouds
Mon 69 76 76 1008 68 18 35 SSE 20 1 light rain
Tue 61 70 61 1008 68 9 13 N 100 2 light rain

Olmos Dam Frequently Asked Questions

In which state is the Olmos Dam?

Olmos Dam is in Texas.

In which county is the Olmos Dam?

Olmos Dam is in Bexar County.

How high is the Olmos Dam?

Olmos Dam is 58 feet high.

How long is the Olmos Dam?

Olmos Dam is 1,941 feet long.

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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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