US Bridges

Blackmer RD over Lit Bear CR

PoorPosted for load

Miller County, Missouri · S 35 T 40 N R 15 W · Structure no. 18876

Built
1930
95 years old
Condition
Poor
inspected January 2025
Type
Girder and Floorbeam System
Steel
Length
40 ft
1 main span
Daily traffic
55
2023 count
Owner
County
County Highway Agency

About this bridge

Blackmer RD over Lit Bear CR is a steel girder and floorbeam system carrying Blackmer RD over Lit Bear CR in Miller County, Missouri. It was built in 1930, so it is 95 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 55 vehicles a day, roughly 10% of them trucks, projected to reach 94 by 2043. The structure is 40 ft (12.2 m) long and 16 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesBlackmer RD
CrossesLit Bear CR
LocationS 35 T 40 N R 15 W
RouteCounty Highway 203
Coordinates38.17325, -92.56031
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
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 geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating23.8 US tons
Inventory rating14.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length40 ft (12.2 m)
Longest span38 ft (11.6 m)
Deck width16 ft (5 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2023)
Projected traffic94 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local 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$344,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Blackmer RD over Lit Bear CR built?

It was built in 1930, making it 95 years old in 2025.

What condition is Blackmer RD over Lit Bear 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 January 2025.

How much traffic does Blackmer RD over Lit Bear CR carry?

About 55 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Blackmer RD over Lit Bear CR?

The structure is 40 ft (12.2 m) long with a longest span of 38 ft (11.6 m) and a deck 16 ft wide.

Who owns Blackmer RD over Lit Bear CR?

It is owned by the County Highway Agency and maintained by the Other Local Agency.