US Bridges

1st ST over Dry Creek

FairPosted for load

Linn County, Iowa · 000000000 · Structure no. 000000000009420

Built
1955
70 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
155 ft
3 main spans
Daily traffic
1,828
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

1st ST over Dry Creek is a steel continuous stringer/multi-beam or girder carrying 1st ST over Dry Creek in Linn County, Iowa. It was built in 1955, so it is 70 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 1,828 vehicles a day, projected to reach 1,828 by 2044. The structure is 155 ft (47.2 m) long and 32 ft wide.

Location

Open in Google Maps
Carries1st ST
CrossesDry Creek
Location000000000
RouteCity Street 0
CountyLinn County
StateIowa
Coordinates42.06322, -91.79576
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.2 US tons
Inventory rating30.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length155 ft (47.2 m)
Longest span59 ft (18 m)
Deck width32 ft (9.8 m)
Roadway width26 ft (8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,828 (2022)
Projected traffic1,828 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 1st ST over Dry Creek built?

It was built in 1955, making it 70 years old in 2025.

What condition is 1st ST over Dry 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 August 2024.

How much traffic does 1st ST over Dry Creek carry?

About 1,828 vehicles per day (2022 count).

How long is 1st ST over Dry Creek?

The structure is 155 ft (47.2 m) long with a longest span of 59 ft (18 m) and a deck 32 ft wide.

Who owns 1st ST over Dry Creek?

It is owned by the City or Municipal Highway Agency.