US Bridges

Rt U S over Long Br

PoorPosted for load

Linn County, Missouri · S 17 T 58 N R 18 W · Structure no. 7958

Built
1955
70 years old
Condition
Poor
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
107 ft
3 main spans
Daily traffic
298
2024 count
Owner
State
State Highway Agency

About this bridge

Rt U S over Long Br is a steel stringer/multi-beam or girder carrying Rt U S over Long Br in Linn County, Missouri. It was built in 1955, so it is 70 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 298 vehicles a day, roughly 22% of them trucks, projected to reach 373 by 2044. The structure is 107 ft (32.6 m) long and 22 ft wide. If it were closed, the detour would be 26.1 mi (42 km).

CarriesRt U S
CrossesLong Br
LocationS 17 T 58 N R 18 W
RouteState Highway 0U
Coordinates39.84646, -92.94407
Functional classRural Minor Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.8 US tons
Inventory rating13.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length107 ft (32.6 m)
Longest span36 ft (11 m)
Deck width22 ft (6.8 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic298 (2024)
Projected traffic373 by 2044
Trucks22%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$716,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rt U S over Long Br built?

It was built in 1955, making it 70 years old in 2025.

What condition is Rt U S over Long Br in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Rt U S over Long Br carry?

About 298 vehicles per day (2024 count), of which roughly 22% are trucks.

How long is Rt U S over Long Br?

The structure is 107 ft (32.6 m) long with a longest span of 36 ft (11 m) and a deck 22 ft wide.

Who owns Rt U S over Long Br?

It is owned by the State Highway Agency.