US Bridges

Thornhill CEMRD659 over Lit Sugar CR

FairPosted for load

Lincoln County, Missouri · S 20 T 49 N R 1 E · Structure no. 19566

Built
1979
46 years old, rebuilt 1992
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
43 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Thornhill CEMRD659 over Lit Sugar CR is a steel stringer/multi-beam or girder carrying Thornhill CEMRD659 over Lit Sugar CR in Lincoln County, Missouri. It was built in 1979 and reconstructed in 1992, so it is 46 years old, older than the Missouri average of 45.1 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. Its operating status is: posted for load restriction.

It carries about 100 vehicles a day, roughly 10% of them trucks, projected to reach 160 by 2043. The structure is 43 ft (13.1 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesThornhill CEMRD659
CrossesLit Sugar CR
LocationS 20 T 49 N R 1 E
RouteCounty Highway 225
Coordinates38.99897, -90.92419
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating21.8 US tons
Inventory rating8.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length43 ft (13.1 m)
Longest span42 ft (12.8 m)
Deck width20 ft (6 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic160 by 2043
Trucks10%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$366,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Thornhill CEMRD659 over Lit Sugar CR built?

It was built in 1979, making it 46 years old in 2025. It was reconstructed in 1992.

What condition is Thornhill CEMRD659 over Lit Sugar CR 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 Thornhill CEMRD659 over Lit Sugar CR carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Thornhill CEMRD659 over Lit Sugar CR?

The structure is 43 ft (13.1 m) long with a longest span of 42 ft (12.8 m) and a deck 20 ft wide.

Who owns Thornhill CEMRD659 over Lit Sugar CR?

It is owned by the County Highway Agency.