US Bridges

155th ST over Minerva Creek

Good

Marshall County, Iowa · 085203503 · Structure no. 000000000244591

Built
2017
8 years old
Condition
Good
inspected November 2023
Type
Slab
Concrete Continuous
Length
121 ft
3 main spans
Daily traffic
30
2022 count
Owner
County
County Highway Agency

About this bridge

155th ST over Minerva Creek is a concrete continuous slab carrying 155th ST over Minerva Creek in Marshall County, Iowa. It was built in 2017, so it is 8 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 121 ft (36.9 m) long and 33 ft wide.

Location

Open in Google Maps
Carries155th ST
CrossesMinerva Creek
Location085203503
RouteCounty Highway 0
CountyMarshall County
StateIowa
Coordinates42.12933, -93.14381
Functional classRural Local

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating57.1 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length121 ft (36.9 m)
Longest span47 ft (14.3 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 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 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost$30,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was 155th ST over Minerva Creek built?

It was built in 2017, making it 8 years old in 2025.

What condition is 155th ST over Minerva 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 November 2023.

How much traffic does 155th ST over Minerva Creek carry?

About 30 vehicles per day (2022 count).

How long is 155th ST over Minerva Creek?

The structure is 121 ft (36.9 m) long with a longest span of 47 ft (14.3 m) and a deck 33 ft wide.

Who owns 155th ST over Minerva Creek?

It is owned by the County Highway Agency.