US Bridges

X 28 over Small Stream

Good

Clayton County, Iowa · T94 R4W S18 · Structure no. 000000000004781

Built
2014
11 years old
Condition
Good
inspected December 2024
Type
Slab
Concrete Continuous
Length
140 ft
3 main spans
Daily traffic
1,179
2022 count
Owner
County
County Highway Agency

About this bridge

X 28 over Small Stream is a concrete continuous slab carrying X 28 over Small Stream in Clayton County, Iowa. It was built in 2014, so it is 11 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 1,179 vehicles a day, roughly 19% of them trucks, projected to reach 1,179 by 2044. The structure is 140 ft (42.7 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesX 28
CrossesSmall Stream
LocationT94 R4W S18
RouteCity Street 0
StateIowa
Coordinates42.96197, -91.36932
Functional classRural Major 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 protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating62.5 US tons
Inventory rating48.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length140 ft (42.7 m)
Longest span55 ft (16.8 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,179 (2022)
Projected traffic1,179 by 2044
Trucks19%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was X 28 over Small Stream built?

It was built in 2014, making it 11 years old in 2025.

What condition is X 28 over Small Stream 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 December 2024.

How much traffic does X 28 over Small Stream carry?

About 1,179 vehicles per day (2022 count), of which roughly 19% are trucks.

How long is X 28 over Small Stream?

The structure is 140 ft (42.7 m) long with a longest span of 55 ft (16.8 m) and a deck 33 ft wide.

Who owns X 28 over Small Stream?

It is owned by the County Highway Agency.