US Bridges

Local 255 ST over Small Stream

Fair

Delaware County, Iowa · 088051905 · Structure no. 000000000140970

Built
1968
57 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
48 ft
2 main spans
Daily traffic
79
2022 count
Owner
County
County Highway Agency

About this bridge

Local 255 ST over Small Stream is a concrete tee beam carrying Local 255 ST over Small Stream in Delaware County, Iowa. It was built in 1968, so it is 57 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 79 vehicles a day, projected to reach 79 by 2044. The structure is 48 ft (14.6 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesLocal 255 ST
CrossesSmall Stream
Location088051905
RouteCounty Highway 0
CountyDelaware County
StateIowa
Coordinates42.41992, -91.46446
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans2
Design loadH 15
Structure length48 ft (14.6 m)
Longest span24 ft (7.3 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic79 (2022)
Projected traffic79 by 2044
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Local 255 ST over Small Stream built?

It was built in 1968, making it 57 years old in 2025.

What condition is Local 255 ST over Small Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Local 255 ST over Small Stream carry?

About 79 vehicles per day (2022 count).

How long is Local 255 ST over Small Stream?

The structure is 48 ft (14.6 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.

Who owns Local 255 ST over Small Stream?

It is owned by the County Highway Agency.