Mississippi River Lock and Dam 5a, Minnesota, USA

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Quick Facts About Mississippi River Lock and Dam 5a

Location: Winona, Minnesota
Coordinates: 44.088115, -91.6692553
River: Mississippi River
Primary Purpose: Navigation
Type: Concrete Earth
Commissioned: 1936
Dam Height: 17 ft (5 m)
Dam Length: 21,520 ft (6,559 m)
Dam Capacity: 260,000 acre-ft (320,705 Ml)
Hazard Potential: Significant
Condition Assessment: Not Available

Mississippi River Lock and Dam 5a Map

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Mississippi River Lock and Dam 5a Information

Mississippi River Lock and Dam 5a is a concrete earth dam located about 3 miles from Winona, Winona, Minnesota.

The dam, which is on the Mississippi River, was primarily built for Navigation purposes, but also serves for Recreation benefits.

The dam was designed by CEMVP and commissioned in 1936 and is currently owned by USACE – St. Paul District.

Mississippi River Lock and Dam 5a Structure

The Mississippi River Lock and Dam 5a is approximately 21,520 feet (6,559 m) long, 17 feet (5 m) high and has a structural volume of 1,271,600 cubic yards (972,208 cubic metres).

Mississippi River Lock and Dam 5a Storage Capacity & Surface Area

The reservoir has a normal storage capacity of 27,700 acre-ft (34,167 Ml) and maximum capacity of 260,000 acre-ft (320,705 Ml).

The surface area of the reservoir is 7,000 acres (2,833 ha) and the total catchment area is 59,105 square miles (153,081 square kilometres).

Mississippi River Lock and Dam 5a Spillway

The dam has a 575 feet (175 m) wide controlled spillway with a maximum discharge capacity of 268000 cubic feet per second (7589 cubic metres per second).

Mississippi River Lock and Dam 5a Compared to Four Famous American Dams

Mississippi River Lock and Dam 5a
Winona, Minnesota
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) 17 730 550 357 216
Length (Ft) 21,520 1,244 5,673 6,920 1,565
Storage Volume (acre-ft) 260,000 30,237,000 9,562,000 3,540,000 29,875,000
Drainage Area (sq miles) 59,105 167,800 74,100 3,611 108,355

Mississippi River Lock and Dam 5a Weather

Current Conditions at Mississippi River Lock and Dam 5a

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7-Day Forecast for Mississippi River Lock and Dam 5a

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Mississippi River Lock and Dam 5a Frequently Asked Questions

In which state is the Mississippi River Lock and Dam 5a?

Mississippi River Lock and Dam 5a is in Minnesota.

In which county is the Mississippi River Lock and Dam 5a?

Mississippi River Lock and Dam 5a is in Winona County.

How high is the Mississippi River Lock and Dam 5a?

Mississippi River Lock and Dam 5a is 17 feet high.

How long is the Mississippi River Lock and Dam 5a?

Mississippi River Lock and Dam 5a is 21,520 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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