US Bridges

S74 (155th Ave) over Shoal Creek

Good

Appanoose County, Iowa · 067191208 · Structure no. 000000000063991

Built
2012
13 years old
Condition
Good
inspected October 2022
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
109 ft
1 main span
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

S74 (155th Ave) over Shoal Creek is a prestressed concrete stringer/multi-beam or girder carrying S74 (155th Ave) over Shoal Creek in Appanoose County, Iowa. It was built in 2012, so it is 13 years old, younger than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 30 vehicles a day, projected to reach 30 by 2043. The structure is 109 ft (33.2 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesS74 (155th Ave)
CrossesShoal Creek
Location067191208
RouteCounty Highway 0
CountyAppanoose County
StateIowa
Coordinates40.62046, -92.99886
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating46.4 US tons
Inventory rating35.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length109 ft (33.2 m)
Longest span105 ft (32 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30 (2022)
Projected traffic30 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was S74 (155th Ave) over Shoal Creek built?

It was built in 2012, making it 13 years old in 2025.

What condition is S74 (155th Ave) over Shoal Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2022.

How much traffic does S74 (155th Ave) over Shoal Creek carry?

About 30 vehicles per day (2022 count).

How long is S74 (155th Ave) over Shoal Creek?

The structure is 109 ft (33.2 m) long with a longest span of 105 ft (32 m) and a deck 27 ft wide.

Who owns S74 (155th Ave) over Shoal Creek?

It is owned by the County Highway Agency.