US Bridges

US 20 WB over D 35 (elm St)

Good

Hardin County, Iowa · 3.4 Miles E of JCT US 65 · Structure no. 000000000607870

Built
2003
22 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
184 ft
3 main spans
Daily traffic
4,900
2022 count
Owner
State
State Highway Agency

About this bridge

US 20 WB over D 35 (elm St) is a prestressed concrete stringer/multi-beam or girder carrying US 20 WB over D 35 (elm St) in Hardin County, Iowa. It was built in 2003, so it is 22 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 4,900 vehicles a day, roughly 28% of them trucks, projected to reach 4,900 by 2044. The structure is 184 ft (56.1 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 20 WB
CrossesD 35 (elm St)
Location3.4 Miles E of JCT US 65
RouteU.S. Route 20
StateIowa
Coordinates42.43356, -93.20117
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.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.5 US tons
Inventory rating45.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length184 ft (56.1 m)
Longest span67 ft (20.4 m)
Deck width43 ft (13 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,900 (2022)
Projected traffic4,900 by 2044
Trucks28%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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 20 WB over D 35 (elm St) built?

It was built in 2003, making it 22 years old in 2025.

What condition is US 20 WB over D 35 (elm St) 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 August 2024.

How much traffic does US 20 WB over D 35 (elm St) carry?

About 4,900 vehicles per day (2022 count), of which roughly 28% are trucks.

How long is US 20 WB over D 35 (elm St)?

The structure is 184 ft (56.1 m) long with a longest span of 67 ft (20.4 m) and a deck 43 ft wide.

Who owns US 20 WB over D 35 (elm St)?

It is owned by the State Highway Agency.