US Bridges

US 218 over Slough Creek

Fair

Floyd County, Iowa · 1.4 Mi. S of SR B17 · Structure no. 000000000025020

Built
1965
60 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
28 ft
1 main span
Daily traffic
2,040
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 over Slough Creek is a concrete slab carrying US 218 over Slough Creek in Floyd County, Iowa. It was built in 1965, so it is 60 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 2,040 vehicles a day, roughly 24% of them trucks, projected to reach 2,040 by 2044. The structure is 28 ft (8.5 m) long and 45 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesUS 218
CrossesSlough Creek
Location1.4 Mi. S of SR B17
RouteU.S. Route 218
CountyFloyd County
StateIowa
Coordinates43.20627, -92.73235
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating39.6 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length28 ft (8.5 m)
Longest span26 ft (7.9 m)
Deck width45 ft (13.8 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,040 (2022)
Projected traffic2,040 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 218 over Slough Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is US 218 over Slough 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 June 2024.

How much traffic does US 218 over Slough Creek carry?

About 2,040 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is US 218 over Slough Creek?

The structure is 28 ft (8.5 m) long with a longest span of 26 ft (7.9 m) and a deck 45 ft wide.

Who owns US 218 over Slough Creek?

It is owned by the State Highway Agency.