US Bridges

Loc 100th ST over Buffalo CR

FairPosted for load

Buchanan County, Iowa · 090080301 · Structure no. 000000000083520

Built
1940
85 years old, rebuilt 2016
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
2 main spans
Daily traffic
40
2021 count
Owner
County
County Highway Agency

About this bridge

Loc 100th ST over Buffalo CR is a steel stringer/multi-beam or girder carrying Loc 100th ST over Buffalo CR in Buchanan County, Iowa. It was built in 1940 and reconstructed in 2016, so it is 85 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 40 vehicles a day, projected to reach 40 by 2043. The structure is 57 ft (17.4 m) long and 21 ft wide.

Location

Open in Google Maps
CarriesLoc 100th ST
CrossesBuffalo CR
Location090080301
RouteCounty Highway 0
CountyBuchanan County
StateIowa
Coordinates42.64346, -91.78176
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
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.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating5 US tons
Inventory rating5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length57 ft (17.4 m)
Longest span28 ft (8.5 m)
Deck width21 ft (6.5 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2021)
Projected traffic40 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Loc 100th ST over Buffalo CR built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2016.

What condition is Loc 100th ST over Buffalo CR 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 April 2023.

How much traffic does Loc 100th ST over Buffalo CR carry?

About 40 vehicles per day (2021 count).

How long is Loc 100th ST over Buffalo CR?

The structure is 57 ft (17.4 m) long with a longest span of 28 ft (8.5 m) and a deck 21 ft wide.

Who owns Loc 100th ST over Buffalo CR?

It is owned by the County Highway Agency.