US Bridges

NE 118th Ave over Skunk River

Good

Polk County, Iowa · 080220505 · Structure no. 000000000282631

Built
1992
33 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
328 ft
4 main spans
Daily traffic
45
2022 count
Owner
County
County Highway Agency

About this bridge

NE 118th Ave over Skunk River is a prestressed concrete continuous stringer/multi-beam or girder carrying NE 118th Ave over Skunk River in Polk County, Iowa. It was built in 1992, so it is 33 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 45 vehicles a day, projected to reach 45 by 2044. The structure is 328 ft (100 m) long and 33 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

CarriesNE 118th Ave
CrossesSkunk River
Location080220505
RouteCounty Highway 0
StateIowa
Coordinates41.77538, -93.43269
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating38.1 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length328 ft (100 m)
Longest span82 ft (25 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2022)
Projected traffic45 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was NE 118th Ave over Skunk River built?

It was built in 1992, making it 33 years old in 2025.

What condition is NE 118th Ave over Skunk River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does NE 118th Ave over Skunk River carry?

About 45 vehicles per day (2022 count).

How long is NE 118th Ave over Skunk River?

The structure is 328 ft (100 m) long with a longest span of 82 ft (25 m) and a deck 33 ft wide.

Who owns NE 118th Ave over Skunk River?

It is owned by the County Highway Agency.