US Bridges

US 30 WB over UP RR 21st ST SW Creek

Fair

Linn County, Iowa · 1.6 Mi.W.Of E.JCT.218 · Structure no. 000000000604150

Built
1980
45 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
996 ft
10 main spans
Daily traffic
15,750
2022 count
Owner
State
State Highway Agency

About this bridge

US 30 WB over UP RR 21st ST SW Creek is a steel continuous stringer/multi-beam or girder carrying US 30 WB over UP RR 21st ST SW Creek in Linn County, Iowa. It was built in 1980, so it is 45 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 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 15,750 vehicles a day, roughly 10% of them trucks, projected to reach 15,750 by 2043. The structure is 996 ft (303.6 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUS 30 WB
CrossesUP RR 21st ST SW Creek
Location1.6 Mi.W.Of E.JCT.218
RouteU.S. Route 30
StateIowa
Coordinates41.93517, -91.7024
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.1 US tons
Inventory rating35.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans10
Design loadHS 20
Structure length996 ft (303.6 m)
Longest span115 ft (35.1 m)
Deck width43 ft (13.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,750 (2022)
Projected traffic15,750 by 2043
Trucks10%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 30 WB over UP RR 21st ST SW Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 30 WB over UP RR 21st ST SW 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 July 2023.

How much traffic does US 30 WB over UP RR 21st ST SW Creek carry?

About 15,750 vehicles per day (2022 count), of which roughly 10% are trucks.

How long is US 30 WB over UP RR 21st ST SW Creek?

The structure is 996 ft (303.6 m) long with a longest span of 115 ft (35.1 m) and a deck 43 ft wide.

Who owns US 30 WB over UP RR 21st ST SW Creek?

It is owned by the State Highway Agency.