US Bridges

Local (lwc) over Big Creek

Fair

Benton County, Iowa · 086121702 · Structure no. 000000000073561

Built
1988
37 years old
Condition
Fair
inspected May 2023
Type
Slab
Steel
Length
104 ft
2 main spans
Daily traffic
34
2021 count
Owner
County
County Highway Agency

About this bridge

Local (lwc) over Big Creek is a steel slab carrying Local (lwc) over Big Creek in Benton County, Iowa. It was built in 1988, so it is 37 years old, younger 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 5 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 34 vehicles a day, projected to reach 34 by 2043. The structure is 104 ft (31.7 m) long and 30 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesLocal (lwc)
CrossesBig Creek
Location086121702
RouteCounty Highway 0
CountyBenton County
StateIowa
Coordinates42.25724, -92.27921
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourUnknown foundation; not evaluated for scour
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.1 US tons
Inventory rating36.2 US tons

Structure

Structure typeSlab
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length104 ft (31.7 m)
Longest span50 ft (15.2 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2021)
Projected traffic34 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local (lwc) over Big Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is Local (lwc) over Big Creek 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 May 2023.

How much traffic does Local (lwc) over Big Creek carry?

About 34 vehicles per day (2021 count).

How long is Local (lwc) over Big Creek?

The structure is 104 ft (31.7 m) long with a longest span of 50 ft (15.2 m) and a deck 30 ft wide.

Who owns Local (lwc) over Big Creek?

It is owned by the County Highway Agency.