US Bridges

150th ST over Roberts Creek

Good

Clayton County, Iowa · 0.6 M E Concord Ave · Structure no. 000000000121521

Built
2016
9 years old
Condition
Good
inspected September 2024
Type
Slab
Concrete Continuous
Length
110 ft
3 main spans
Daily traffic
26
2022 count
Owner
County
County Highway Agency

About this bridge

150th ST over Roberts Creek is a concrete continuous slab carrying 150th ST over Roberts Creek in Clayton County, Iowa. It was built in 2016, so it is 9 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 26 vehicles a day, projected to reach 26 by 2044. The structure is 110 ft (33.5 m) long and 32 ft wide.

Carries150th ST
CrossesRoberts Creek
Location0.6 M E Concord Ave
RouteCounty Highway 0
StateIowa
Coordinates43.00749, -91.50645
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 protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
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 geometry7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating53.9 US tons
Inventory rating41.8 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length110 ft (33.5 m)
Longest span43 ft (13.1 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic26 (2022)
Projected traffic26 by 2044
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was 150th ST over Roberts Creek built?

It was built in 2016, making it 9 years old in 2025.

What condition is 150th ST 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 September 2024.

How much traffic does 150th ST over Roberts Creek carry?

About 26 vehicles per day (2022 count).

How long is 150th ST over Roberts Creek?

The structure is 110 ft (33.5 m) long with a longest span of 43 ft (13.1 m) and a deck 32 ft wide.

Who owns 150th ST over Roberts Creek?

It is owned by the County Highway Agency.