US Bridges

Broad Ave over Branch Tarkio Creek

Fair

Montgomery County, Iowa · 071370410 · Structure no. 000000000011131

Built
1983
42 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
90 ft
3 main spans
Daily traffic
527
2022 count
Owner
County
County Highway Agency

About this bridge

Broad Ave over Branch Tarkio Creek is a concrete continuous slab carrying Broad Ave over Branch Tarkio Creek in Montgomery County, Iowa. It was built in 1983, so it is 42 years old, younger 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 527 vehicles a day, projected to reach 527 by 2044. The structure is 90 ft (27.4 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBroad Ave
CrossesBranch Tarkio Creek
Location071370410
RouteCity Street 0
CountyMontgomery County
StateIowa
Coordinates40.97939, -95.10413
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating58.1 US tons
Inventory rating35.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length90 ft (27.4 m)
Longest span34 ft (10.4 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic527 (2022)
Projected traffic527 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Broad Ave over Branch Tarkio Creek built?

It was built in 1983, making it 42 years old in 2025.

What condition is Broad Ave over Branch Tarkio 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 May 2024.

How much traffic does Broad Ave over Branch Tarkio Creek carry?

About 527 vehicles per day (2022 count).

How long is Broad Ave over Branch Tarkio Creek?

The structure is 90 ft (27.4 m) long with a longest span of 34 ft (10.4 m) and a deck 38 ft wide.

Who owns Broad Ave over Branch Tarkio Creek?

It is owned by the County Highway Agency.