US Bridges

Military RD over Big Sioux River

Fair

Woodbury County, Iowa · 000000000 · Structure no. 000000000502190

Built
1976
49 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
413 ft
4 main spans
Daily traffic
7,542
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Military RD over Big Sioux River is a steel continuous stringer/multi-beam or girder carrying Military RD over Big Sioux River in Woodbury County, Iowa. It was built in 1976, so it is 49 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 7,542 vehicles a day, roughly 3% of them trucks, projected to reach 7,542 by 2043. The structure is 413 ft (125.9 m) long and 67 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesMilitary RD
CrossesBig Sioux River
Location000000000
RouteCity Street 0
CountyWoodbury County
StateIowa
Coordinates42.52449, -96.4802
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.8 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length413 ft (125.9 m)
Longest span116 ft (35.4 m)
Deck width67 ft (20.3 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,542 (2021)
Projected traffic7,542 by 2043
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Military RD over Big Sioux River built?

It was built in 1976, making it 49 years old in 2025.

What condition is Military RD over Big Sioux River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2023.

How much traffic does Military RD over Big Sioux River carry?

About 7,542 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Military RD over Big Sioux River?

The structure is 413 ft (125.9 m) long with a longest span of 116 ft (35.4 m) and a deck 67 ft wide.

Who owns Military RD over Big Sioux River?

It is owned by the City or Municipal Highway Agency.