US Bridges

Lcl-Dobney Ave over Silver Creek

Fair

Mills County, Iowa · 073421305 · Structure no. 000000000247061

Built
1977
48 years old
Condition
Fair
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
229 ft
3 main spans
Daily traffic
100
2022 count
Owner
County
County Highway Agency

About this bridge

Lcl-Dobney Ave over Silver Creek is a steel continuous stringer/multi-beam or girder carrying Lcl-Dobney Ave over Silver Creek in Mills County, Iowa. It was built in 1977, so it is 48 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 100 vehicles a day, projected to reach 100 by 2043. The structure is 229 ft (69.8 m) long and 26 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesLcl-Dobney Ave
CrossesSilver Creek
Location073421305
RouteCounty Highway 0
CountyMills County
StateIowa
Coordinates41.11743, -95.6315
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
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 rating51.8 US tons
Inventory rating31 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length229 ft (69.8 m)
Longest span88 ft (26.8 m)
Deck width26 ft (8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2022)
Projected traffic100 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Lcl-Dobney Ave over Silver Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Lcl-Dobney Ave over Silver 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 February 2023.

How much traffic does Lcl-Dobney Ave over Silver Creek carry?

About 100 vehicles per day (2022 count).

How long is Lcl-Dobney Ave over Silver Creek?

The structure is 229 ft (69.8 m) long with a longest span of 88 ft (26.8 m) and a deck 26 ft wide.

Who owns Lcl-Dobney Ave over Silver Creek?

It is owned by the County Highway Agency.