US Bridges

County RD 175 over North Rvr

FairPosted for load

Marion County, Missouri · S 7 T 58 N R 8 W · Structure no. 16109

Built
1910
115 years old
Condition
Fair
inspected February 2023
Type
Truss - Thru
Steel
Length
101 ft
1 main span
Daily traffic
35
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 175 over North Rvr is a steel truss - thru carrying County RD 175 over North Rvr in Marion County, Missouri. It was built in 1910, so it is 115 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 35 vehicles a day, roughly 10% of them trucks, projected to reach 44 by 2043. The structure is 101 ft (30.8 m) long and 15 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty RD 175
CrossesNorth Rvr
LocationS 7 T 58 N R 8 W
RouteCounty Highway 110
CountyMarion County
StateMissouri
Coordinates39.84508, -91.84297
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 inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating18.8 US tons
Inventory rating12.9 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length101 ft (30.8 m)
Longest span100 ft (30.5 m)
Deck width15 ft (4.7 m)
Roadway width15 ft (4.6 m)
Vertical clearance over deck13 ft (4 m)

Traffic and service

Average daily traffic35 (2023)
Projected traffic44 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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$710,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 175 over North Rvr built?

It was built in 1910, making it 115 years old in 2025.

What condition is County RD 175 over 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 175 over North Rvr carry?

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

How long is County RD 175 over North Rvr?

The structure is 101 ft (30.8 m) long with a longest span of 100 ft (30.5 m) and a deck 15 ft wide.

Who owns County RD 175 over North Rvr?

It is owned by the County Highway Agency.