US Bridges

B ST over Drainage

Fair

Jefferson County, Iowa · 072102504 · Structure no. 000000000004745

Built
1972
53 years old
Condition
Fair
inspected February 2023
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
1,925
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

B ST over Drainage is a concrete continuous culvert carrying B ST over Drainage in Jefferson County, Iowa. It was built in 1972, so it is 53 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 5 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 1,925 vehicles a day, projected to reach 1,925 by 2043. The structure is 27 ft (8.2 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesB ST
CrossesDrainage
Location072102504
RouteCity Street 0
CountyJefferson County
StateIowa
Coordinates41.01672, -91.96026
Functional classUrban 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.5 US tons
Inventory rating28.5 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 20
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,925 (2022)
Projected traffic1,925 by 2043
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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was B ST over Drainage built?

It was built in 1972, making it 53 years old in 2025.

What condition is B ST over Drainage 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 February 2023.

How much traffic does B ST over Drainage carry?

About 1,925 vehicles per day (2022 count).

How long is B ST over Drainage?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m).

Who owns B ST over Drainage?

It is owned by the City or Municipal Highway Agency.