Loiza Dam, Puerto Rico, USA

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Quick Facts About Loiza Dam

Location: Trujillo Alto, Puerto Rico
Coordinates: 18.33, -66.015
River: Grande De Loiza River
Primary Purpose: Hydroelectric
Type: Gravity
Commissioned: 1954
Dam Height: 95 ft (29 m)
Dam Length: 728 ft (222 m)
Dam Capacity: 30,000 acre-ft (37,004 Ml)
Condition Assessment: Satisfactory

Loiza Dam Map

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Loiza Dam Information

Loiza Dam is a gravity dam located about 2 miles from Trujillo Alto, Trujillo Alto, Puerto Rico.

The dam, which is on the Grande De Loiza River, was primarily built for Hydroelectric purposes, but also serves for Water Supply benefits.

The dam was designed by BUCK, SAIFER AND JOST and commissioned in 1954 and is currently owned by PUERTO RICO AQUEDUCT AND SEWER AUTHORITY.

Loiza Dam Structure

The Loiza Dam is approximately 728 feet (222 m) long, 95 feet (29 m) high and has a structural volume of 66,700 cubic yards (50,996 cubic metres).

Loiza Dam Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 23,500 acre-ft (28,987 Ml) and maximum capacity of 30,000 acre-ft (37,004 Ml).

The surface area of the reservoir is 175 acres (71 ha) and the total catchment area is 207 square miles (536 square kilometres).

Loiza Dam Spillway

The dam has a 368 feet (112 m) wide controlled spillway with a maximum discharge capacity of 312000 cubic feet per second (8835 cubic metres per second).

Loiza Dam Compared to Four Famous American Dams

Loiza Dam
Trujillo Alto, Puerto Rico
Hoover Dam
Clark County, Nevada
Grand Coulee Dam
Okanogan County, Washington
Theodore Roosevelt Dam
Maricopa County, Arizona
Glen Canyon Dam
Coconino County, Arizona
Height (ft) 95 730 550 357 216
Length (Ft) 728 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 30,000 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 207 167,800 74,100 3,611 108,355

Loiza Dam Weather

Current Conditions at Loiza Dam

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7-Day Forecast for Loiza Dam

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Loiza Dam Frequently Asked Questions

In which state is the Loiza Dam?

Loiza Dam is in Puerto Rico.

In which county is the Loiza Dam?

Loiza Dam is in Trujillo Alto County.

How high is the Loiza Dam?

Loiza Dam is 95 feet high.

How long is the Loiza Dam?

Loiza Dam is 728 feet long.

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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