US Bridges

N Centerpoint over East Blue Creek

Fair

Linn County, Iowa · 086082102 · Structure no. 000000000033890

Built
1926
99 years old, rebuilt 1983
Condition
Fair
inspected September 2024
Type
Culvert
Concrete Continuous
Length
29 ft
2 main spans
Daily traffic
2,583
2022 count
Owner
County
County Highway Agency

About this bridge

N Centerpoint over East Blue Creek is a concrete continuous culvert carrying N Centerpoint over East Blue Creek in Linn County, Iowa. It was built in 1926 and reconstructed in 1983, so it is 99 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.

It carries about 2,583 vehicles a day, roughly 14% of them trucks, projected to reach 2,583 by 2044. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesN Centerpoint
CrossesEast Blue Creek
Location086082102
RouteCounty Highway 0
CountyLinn County
StateIowa
Coordinates42.24133, -91.78335
Functional classRural Major 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 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
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.4 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHL 93
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,583 (2022)
Projected traffic2,583 by 2044
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 N Centerpoint over East Blue Creek built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1983.

What condition is N Centerpoint over East 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 N Centerpoint over East Blue Creek carry?

About 2,583 vehicles per day (2022 count), of which roughly 14% are trucks.

How long is N Centerpoint over East Blue Creek?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m).

Who owns N Centerpoint over East Blue Creek?

It is owned by the County Highway Agency.