US Bridges

Is 49 S over Mormon Fk CR

Poor

Bates County, Missouri · S 9 T 42 N R 31 W · Structure no. 4920

Built
1926
99 years old, rebuilt 1992
Condition
Poor
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
1 main span
Daily traffic
10,271
2024 count
Owner
State
State Highway Agency

About this bridge

Is 49 S over Mormon Fk CR is a steel stringer/multi-beam or girder carrying Is 49 S over Mormon Fk CR in Bates County, Missouri. It was built in 1926 and reconstructed in 1992, so it is 99 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 3 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.

It carries about 10,271 vehicles a day, roughly 35% of them trucks, projected to reach 17,974 by 2044. The structure is 127 ft (38.7 m) long and 32 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesIs 49 S
CrossesMormon Fk CR
LocationS 9 T 42 N R 31 W
RouteInterstate 49
Coordinates38.45405, -94.34231
Functional classRural Principal Arterial - Interstate

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
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
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 inspectionOctober 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
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating23.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+2 approach)
Design loadH 20
Structure length127 ft (38.7 m)
Longest span61 ft (18.5 m)
Deck width32 ft (9.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,271 (2024)
Projected traffic17,974 by 2044
Trucks35%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$977,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 49 S over Mormon Fk CR built?

It was built in 1926, making it 99 years old in 2025. It was reconstructed in 1992.

What condition is Is 49 S over Mormon Fk CR 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 October 2023.

How much traffic does Is 49 S over Mormon Fk CR carry?

About 10,271 vehicles per day (2024 count), of which roughly 35% are trucks.

How long is Is 49 S over Mormon Fk CR?

The structure is 127 ft (38.7 m) long with a longest span of 61 ft (18.5 m) and a deck 32 ft wide.

Who owns Is 49 S over Mormon Fk CR?

It is owned by the State Highway Agency.