US Bridges

172nd Street over Roberts Creek

Good

Clayton County, Iowa · 094050703 · Structure no. 000000000120462

Built
1993
32 years old
Condition
Good
inspected October 2024
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

172nd Street over Roberts Creek is a concrete continuous slab carrying 172nd Street over Roberts Creek in Clayton County, Iowa. It was built in 1993, so it is 32 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 26 vehicles a day, roughly 27% of them trucks, projected to reach 26 by 2044. The structure is 100 ft (30.5 m) long and 33 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Carries172nd Street
CrossesRoberts Creek
Location094050703
RouteCounty Highway 0
StateIowa
Coordinates42.97501, -91.48325
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.6 US tons
Inventory rating53.1 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span39 ft (11.9 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
Trucks27%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 172nd Street over Roberts Creek built?

It was built in 1993, making it 32 years old in 2025.

What condition is 172nd Street over Roberts 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 2024.

How much traffic does 172nd Street over Roberts Creek carry?

About 26 vehicles per day (2022 count), of which roughly 27% are trucks.

How long is 172nd Street over Roberts Creek?

The structure is 100 ft (30.5 m) long with a longest span of 39 ft (11.9 m) and a deck 33 ft wide.

Who owns 172nd Street over Roberts Creek?

It is owned by the County Highway Agency.