US Bridges

Bluff RD over Trib Lake CR

PoorPosted for load

Warren County, Missouri · S 34 T 45 N R 1 W · Structure no. 17000

Built
1900
125 years old
Condition
Poor
inspected February 2024
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
150
2024 count
Owner
County
County Highway Agency

About this bridge

Bluff RD over Trib Lake CR is a concrete slab carrying Bluff RD over Trib Lake CR in Warren County, Missouri. It was built in 1900, so it is 125 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 150 vehicles a day, roughly 10% of them trucks, projected to reach 240 by 2044. The structure is 23 ft (7 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesBluff RD
CrossesTrib Lake CR
LocationS 34 T 45 N R 1 W
RouteCounty Highway 139
Coordinates38.60872, -91.00508
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
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 inspectionFebruary 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 rating22.8 US tons
Inventory rating9.9 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.7 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic240 by 2044
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$239,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Bluff RD over Trib Lake CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is Bluff RD over Trib Lake 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 February 2024.

How much traffic does Bluff RD over Trib Lake CR carry?

About 150 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Bluff RD over Trib Lake CR?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Bluff RD over Trib Lake CR?

It is owned by the County Highway Agency.