US Bridges

EB US 30 over Morgan Creek

Fair

Linn County, Iowa · 3.6 MI W of JCT US 151 · Structure no. 000000000033411

Built
1992
33 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
113 ft
3 main spans
Daily traffic
7,700
2022 count
Owner
State
State Highway Agency

About this bridge

EB US 30 over Morgan Creek is a concrete continuous slab carrying EB US 30 over Morgan Creek in Linn County, Iowa. It was built in 1992, so it is 33 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 7,700 vehicles a day, roughly 15% of them trucks, projected to reach 7,700 by 2044. The structure is 113 ft (34.4 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesEB US 30
CrossesMorgan Creek
Location3.6 MI W of JCT US 151
RouteU.S. Route 30
CountyLinn County
StateIowa
Coordinates41.96401, -91.80523
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.4 US tons
Inventory rating23.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length113 ft (34.4 m)
Longest span43 ft (13.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,700 (2022)
Projected traffic7,700 by 2044
Trucks15%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was EB US 30 over Morgan Creek built?

It was built in 1992, making it 33 years old in 2025.

What condition is EB US 30 over Morgan Creek 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 May 2024.

How much traffic does EB US 30 over Morgan Creek carry?

About 7,700 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is EB US 30 over Morgan Creek?

The structure is 113 ft (34.4 m) long with a longest span of 43 ft (13.1 m) and a deck 43 ft wide.

Who owns EB US 30 over Morgan Creek?

It is owned by the State Highway Agency.