US Bridges

EB US 30 over Cedar River Trail

Good

Linn County, Iowa · 1.9 Mi. E of Jct. I-380 · Structure no. 000000000033451

Built
1976
49 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
188 ft
3 main spans
Daily traffic
9,300
2022 count
Owner
State
State Highway Agency

About this bridge

EB US 30 over Cedar River Trail is a prestressed concrete stringer/multi-beam or girder carrying EB US 30 over Cedar River Trail in Linn County, Iowa. It was built in 1976, so it is 49 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 9,300 vehicles a day, roughly 17% of them trucks, projected to reach 9,300 by 2042. The structure is 188 ft (57.3 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesEB US 30
CrossesCedar River Trail
Location1.9 Mi. E of Jct. I-380
RouteU.S. Route 30
StateIowa
Coordinates41.92643, -91.63273
Functional classUrban Other Principal Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
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 alignment7: Better than present minimum criteria
Operating rating73.6 US tons
Inventory rating32 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length188 ft (57.3 m)
Longest span69 ft (21 m)
Deck width55 ft (16.8 m)
Roadway width52 ft (15.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,300 (2022)
Projected traffic9,300 by 2042
Trucks17%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesPedestrian / bicycle
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 EB US 30 over Cedar River Trail built?

It was built in 1976, making it 49 years old in 2025.

What condition is EB US 30 over Cedar River Trail 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 June 2023.

How much traffic does EB US 30 over Cedar River Trail carry?

About 9,300 vehicles per day (2022 count), of which roughly 17% are trucks.

How long is EB US 30 over Cedar River Trail?

The structure is 188 ft (57.3 m) long with a longest span of 69 ft (21 m) and a deck 55 ft wide.

Who owns EB US 30 over Cedar River Trail?

It is owned by the State Highway Agency.