US Bridges

FM G-30 over I-80

Fair

Pottawattamie County, Iowa · At JCT SR G-30 · Structure no. 000000000045320

Built
1968
57 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
316 ft
4 main spans
Daily traffic
2,510
2022 count
Owner
State
State Highway Agency

About this bridge

FM G-30 over I-80 is a steel continuous stringer/multi-beam or girder carrying FM G-30 over I-80 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 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 2,510 vehicles a day, roughly 13% of them trucks, projected to reach 2,510 by 2043. The structure is 316 ft (96.3 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesFM G-30
CrossesI-80
LocationAt JCT SR G-30
RouteCounty Highway 0
StateIowa
Coordinates41.37623, -95.6762
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.1 US tons
Inventory rating40.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length316 ft (96.3 m)
Longest span97 ft (29.6 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,510 (2022)
Projected traffic2,510 by 2043
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was FM G-30 over I-80 built?

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

What condition is FM G-30 over I-80 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 July 2023.

How much traffic does FM G-30 over I-80 carry?

About 2,510 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM G-30 over I-80?

The structure is 316 ft (96.3 m) long with a longest span of 97 ft (29.6 m) and a deck 35 ft wide.

Who owns FM G-30 over I-80?

It is owned by the State Highway Agency.