US Bridges

N Buffalo Ave over I-80 & US 6

Fair

Scott County, Iowa · 0.5 Mi. W of Jct. I-280 · Structure no. 000000000047460

Built
1959
66 years old
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
233 ft
4 main spans
Daily traffic
1,320
2022 count
Owner
State
State Highway Agency

About this bridge

N Buffalo Ave over I-80 & US 6 is a prestressed concrete stringer/multi-beam or girder carrying N Buffalo Ave over I-80 & US 6 in Scott County, Iowa. It was built in 1959, so it is 66 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 1,320 vehicles a day, projected to reach 1,320 by 2044. The structure is 233 ft (71 m) long and 29 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesN Buffalo Ave
CrossesI-80 & US 6
Location0.5 Mi. W of Jct. I-280
RouteCounty Highway 0
CountyScott County
StateIowa
Coordinates41.60343, -90.68567
Functional classRural Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating48.5 US tons
Inventory rating18.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length233 ft (71 m)
Longest span71 ft (21.6 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,320 (2022)
Projected traffic1,320 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemNo

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was N Buffalo Ave over I-80 & US 6 built?

It was built in 1959, making it 66 years old in 2025.

What condition is N Buffalo Ave over I-80 & US 6 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 March 2024.

How much traffic does N Buffalo Ave over I-80 & US 6 carry?

About 1,320 vehicles per day (2022 count).

How long is N Buffalo Ave over I-80 & US 6?

The structure is 233 ft (71 m) long with a longest span of 71 ft (21.6 m) and a deck 29 ft wide.

Who owns N Buffalo Ave over I-80 & US 6?

It is owned by the State Highway Agency.