US Bridges

Durow RD over Blue Creek

FairPosted for load

Linn County, Iowa · 086083105 · Structure no. 000000000223450

Built
1951
74 years old, rebuilt 1989
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
160 ft
1 main span
Daily traffic
148
2022 count
Owner
County
County Highway Agency

About this bridge

Durow RD over Blue Creek is a steel truss - thru carrying Durow RD over Blue Creek in Linn County, Iowa. It was built in 1951 and reconstructed in 1989, so it is 74 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 5 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 148 vehicles a day, projected to reach 148 by 2044. The structure is 160 ft (48.8 m) long and 19 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesDurow RD
CrossesBlue Creek
Location086083105
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.21913, -91.82366
Functional classRural Local

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating22.8 US tons
Inventory rating17.5 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadHL 93
Structure length160 ft (48.8 m)
Longest span160 ft (48.8 m)
Deck width19 ft (5.9 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic148 (2022)
Projected traffic148 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Durow RD over Blue Creek built?

It was built in 1951, making it 74 years old in 2025. It was reconstructed in 1989.

What condition is Durow RD over Blue 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 September 2024.

How much traffic does Durow RD over Blue Creek carry?

About 148 vehicles per day (2022 count).

How long is Durow RD over Blue Creek?

The structure is 160 ft (48.8 m) long with a longest span of 160 ft (48.8 m) and a deck 19 ft wide.

Who owns Durow RD over Blue Creek?

It is owned by the County Highway Agency.