US Bridges

County RD 187 over Big Br North Rvr

Fair

Marion County, Missouri · S 21 T 58 N R 7 W · Structure no. 17170

Built
1986
39 years old
Condition
Fair
inspected February 2023
Type
Tee Beam
Prestressed Concrete Continuous
Length
91 ft
3 main spans
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 187 over Big Br North Rvr is a prestressed concrete continuous tee beam carrying County RD 187 over Big Br North Rvr in Marion County, Missouri. It was built in 1986, so it is 39 years old, younger 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 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2043. The structure is 91 ft (27.7 m) long and 27 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty RD 187
CrossesBig Br North Rvr
LocationS 21 T 58 N R 7 W
RouteCounty Highway 144
CountyMarion County
StateMissouri
Coordinates39.80494, -91.67639
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length91 ft (27.7 m)
Longest span48 ft (14.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2023)
Projected traffic44 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 187 over Big Br North Rvr built?

It was built in 1986, making it 39 years old in 2025.

What condition is County RD 187 over Big Br North Rvr 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 February 2023.

How much traffic does County RD 187 over Big Br North Rvr carry?

About 35 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 187 over Big Br North Rvr?

The structure is 91 ft (27.7 m) long with a longest span of 48 ft (14.6 m) and a deck 27 ft wide.

Who owns County RD 187 over Big Br North Rvr?

It is owned by the County Highway Agency.