US Bridges

EB I-80 over Mahogany Road

Good

Pottawattamie County, Iowa · 1.3 Mi. E of SR G-30 · Structure no. 000000000045330

Built
1968
57 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
142 ft
3 main spans
Daily traffic
11,850
2022 count
Owner
State
State Highway Agency

About this bridge

EB I-80 over Mahogany Road is a prestressed concrete stringer/multi-beam or girder carrying EB I-80 over Mahogany Road in Pottawattamie County, Iowa. It was built in 1968, so it is 57 years old, older 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 11,850 vehicles a day, roughly 36% of them trucks, projected to reach 11,850 by 2042. The structure is 142 ft (43.3 m) long and 42 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesEB I-80
CrossesMahogany Road
Location1.3 Mi. E of SR G-30
RouteInterstate 80
StateIowa
Coordinates41.39053, -95.66785
Functional classRural Principal Arterial - Interstate

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.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.2 US tons
Inventory rating35.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span52 ft (15.9 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,850 (2022)
Projected traffic11,850 by 2042
Trucks36%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 EB I-80 over Mahogany Road built?

It was built in 1968, making it 57 years old in 2025.

What condition is EB I-80 over Mahogany Road 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 May 2023.

How much traffic does EB I-80 over Mahogany Road carry?

About 11,850 vehicles per day (2022 count), of which roughly 36% are trucks.

How long is EB I-80 over Mahogany Road?

The structure is 142 ft (43.3 m) long with a longest span of 52 ft (15.9 m) and a deck 42 ft wide.

Who owns EB I-80 over Mahogany Road?

It is owned by the State Highway Agency.