US Bridges

County RD 149 over Messner Br of Salt

PoorClosed to traffic

Shelby County, Missouri · S 25 T 59 N R 11 W · Structure no. 13644

Built
1910
115 years old
Condition
Poor
inspected March 2022
Type
Truss - Thru
Steel
Length
31 ft
1 main span
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 149 over Messner Br of Salt is a steel truss - thru carrying County RD 149 over Messner Br of Salt in Shelby County, Missouri. It was built in 1910, so it is 115 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 2 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: closed to all traffic.

It carries about 15 vehicles a day, roughly 10% of them trucks, projected to reach 19 by 2044. The structure is 31 ft (9.4 m) long and 12 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty RD 149
CrossesMessner Br of Salt
LocationS 25 T 59 N R 11 W
RouteCounty Highway 44
CountyShelby County
StateMissouri
Coordinates39.8845, -92.07547
Functional classRural Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure2 CriticalAdvanced deterioration of primary structural elements. Bridge may be closed until corrective action is taken.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2022
Inspection intervalevery 24 months
Operating statusClosed to all traffic
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation0: Immediate repair necessary to put back in service
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating0 US tons
Inventory rating0 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckWood or timber
Main spans1
Design loadOther
Structure length31 ft (9.4 m)
Longest span30 ft (9.1 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic19 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$289,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 149 over Messner Br of Salt built?

It was built in 1910, making it 115 years old in 2025.

What condition is County RD 149 over Messner Br of Salt 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 March 2022.

How much traffic does County RD 149 over Messner Br of Salt carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 149 over Messner Br of Salt?

The structure is 31 ft (9.4 m) long with a longest span of 30 ft (9.1 m) and a deck 12 ft wide.

Who owns County RD 149 over Messner Br of Salt?

It is owned by the County Highway Agency.