US Bridges

US 218 NB over Ia 14 & Sherman Creek

Good

Floyd County, Iowa · At Jct. Ia 14 · Structure no. 000000000607600

Built
1999
26 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
493 ft
6 main spans
Daily traffic
4,150
2022 count
Owner
State
State Highway Agency

About this bridge

US 218 NB over Ia 14 & Sherman Creek is a prestressed concrete stringer/multi-beam or girder carrying US 218 NB over Ia 14 & Sherman Creek in Floyd County, Iowa. It was built in 1999, so it is 26 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 4,150 vehicles a day, roughly 45% of them trucks, projected to reach 4,150 by 2042. The structure is 493 ft (150.3 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 218 NB
CrossesIa 14 & Sherman Creek
LocationAt Jct. Ia 14
RouteU.S. Route 18
StateIowa
Coordinates43.05958, -92.71743
Functional classRural Principal Arterial - Other

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.1 US tons
Inventory rating39.8 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length493 ft (150.3 m)
Longest span112 ft (34.1 m)
Deck width52 ft (16 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,150 (2022)
Projected traffic4,150 by 2042
Trucks45%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 218 NB over Ia 14 & Sherman Creek built?

It was built in 1999, making it 26 years old in 2025.

What condition is US 218 NB over Ia 14 & Sherman Creek 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 2023.

How much traffic does US 218 NB over Ia 14 & Sherman Creek carry?

About 4,150 vehicles per day (2022 count), of which roughly 45% are trucks.

How long is US 218 NB over Ia 14 & Sherman Creek?

The structure is 493 ft (150.3 m) long with a longest span of 112 ft (34.1 m) and a deck 52 ft wide.

Who owns US 218 NB over Ia 14 & Sherman Creek?

It is owned by the State Highway Agency.