US Bridges

Loc 100th ST over W Branch Buffalo Ck

Fair

Buchanan County, Iowa · 090080501 · Structure no. 000000000083541

Built
1979
46 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
55 ft
1 main span
Daily traffic
79
2022 count
Owner
County
County Highway Agency

About this bridge

Loc 100th ST over W Branch Buffalo Ck is a prestressed concrete stringer/multi-beam or girder carrying Loc 100th ST over W Branch Buffalo Ck in Buchanan County, Iowa. It was built in 1979, so it is 46 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 79 vehicles a day, projected to reach 79 by 2043. The structure is 55 ft (16.8 m) long and 32 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesLoc 100th ST
CrossesW Branch Buffalo Ck
Location090080501
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.64364, -91.82147
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.3 US tons
Inventory rating36.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length55 ft (16.8 m)
Longest span55 ft (16.8 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2022)
Projected traffic79 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Loc 100th ST over W Branch Buffalo Ck built?

It was built in 1979, making it 46 years old in 2025.

What condition is Loc 100th ST over W Branch Buffalo Ck 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 December 2023.

How much traffic does Loc 100th ST over W Branch Buffalo Ck carry?

About 79 vehicles per day (2022 count).

How long is Loc 100th ST over W Branch Buffalo Ck?

The structure is 55 ft (16.8 m) long with a longest span of 55 ft (16.8 m) and a deck 32 ft wide.

Who owns Loc 100th ST over W Branch Buffalo Ck?

It is owned by the County Highway Agency.