US Bridges

Prairieburg RD over Buffalo Creek

Fair

Linn County, Iowa · 085050306 · Structure no. 000000000221861

Built
1974
51 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
192 ft
3 main spans
Daily traffic
520
2022 count
Owner
County
County Highway Agency

About this bridge

Prairieburg RD over Buffalo Creek is a prestressed concrete continuous stringer/multi-beam or girder carrying Prairieburg RD over Buffalo Creek in Linn County, Iowa. It was built in 1974, so it is 51 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.

It carries about 520 vehicles a day, roughly 16% of them trucks, projected to reach 520 by 2044. The structure is 192 ft (58.5 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesPrairieburg RD
CrossesBuffalo Creek
Location085050306
RouteCounty Highway 0
StateIowa
Coordinates42.19555, -91.42318
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
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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.9 US tons
Inventory rating36.9 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length192 ft (58.5 m)
Longest span69 ft (21 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2022)
Projected traffic520 by 2044
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Prairieburg RD over Buffalo Creek built?

It was built in 1974, making it 51 years old in 2025.

What condition is Prairieburg RD over Buffalo 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 Prairieburg RD over Buffalo Creek carry?

About 520 vehicles per day (2022 count), of which roughly 16% are trucks.

How long is Prairieburg RD over Buffalo Creek?

The structure is 192 ft (58.5 m) long with a longest span of 69 ft (21 m) and a deck 32 ft wide.

Who owns Prairieburg RD over Buffalo Creek?

It is owned by the County Highway Agency.