US Bridges

Ia 100 over I-380 & Ccp RR

Fair

Linn County, Iowa · At the Jct. I-380 · Structure no. 000000000604715

Built
1982
43 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
714 ft
10 main spans
Daily traffic
14,000
2022 count
Owner
State
State Highway Agency

About this bridge

Ia 100 over I-380 & Ccp RR is a prestressed concrete stringer/multi-beam or girder carrying Ia 100 over I-380 & Ccp RR in Linn County, Iowa. It was built in 1982, so it is 43 years old, younger 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 14,000 vehicles a day, roughly 2% of them trucks, projected to reach 14,000 by 2043. The structure is 714 ft (217.6 m) long and 87 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesIa 100
CrossesI-380 & Ccp RR
LocationAt the Jct. I-380
RouteState Highway 100
CountyLinn County
StateIowa
Coordinates42.02811, -91.67393
Functional classUrban Other Principal 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.5 US tons
Inventory rating34.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length714 ft (217.6 m)
Longest span96 ft (29.3 m)
Deck width87 ft (26.6 m)
Roadway width82 ft (25 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,000 (2022)
Projected traffic14,000 by 2043
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesOverpass structure at an interchange
CrossesHighway and railroad
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 Ia 100 over I-380 & Ccp RR built?

It was built in 1982, making it 43 years old in 2025.

What condition is Ia 100 over I-380 & Ccp RR 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 September 2023.

How much traffic does Ia 100 over I-380 & Ccp RR carry?

About 14,000 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Ia 100 over I-380 & Ccp RR?

The structure is 714 ft (217.6 m) long with a longest span of 96 ft (29.3 m) and a deck 87 ft wide.

Who owns Ia 100 over I-380 & Ccp RR?

It is owned by the State Highway Agency.