US Bridges

CR 305 over Unnamed Crk

Fair

Lewis County, Missouri · S 14 T 61 N R 8 W · Structure no. 36874

Built
2022
3 years old
Condition
Fair
inspected January 2024
Type
Channel Beam
Concrete
Length
34 ft
1 main span
Daily traffic
75
2024 count
Owner
County
County Highway Agency

About this bridge

CR 305 over Unnamed Crk is a concrete channel beam carrying CR 305 over Unnamed Crk in Lewis County, Missouri. It was built in 2022, so it is 3 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 75 vehicles a day, roughly 1% of them trucks, projected to reach 94 by 2044. The structure is 34 ft (10.4 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesCR 305
CrossesUnnamed Crk
LocationS 14 T 61 N R 8 W
RouteCounty Highway 305
CountyLewis County
StateMissouri
Coordinates40.08806, -91.75722
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
Deck9 ExcellentNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.3 US tons
Inventory rating54.6 US tons

Structure

Structure typeChannel Beam
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span34 ft (10.4 m)
Deck width23 ft (7 m)
Roadway width23 ft (7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic75 (2024)
Projected traffic94 by 2044
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was CR 305 over Unnamed Crk built?

It was built in 2022, making it 3 years old in 2025.

What condition is CR 305 over Unnamed Crk 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 January 2024.

How much traffic does CR 305 over Unnamed Crk carry?

About 75 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is CR 305 over Unnamed Crk?

The structure is 34 ft (10.4 m) long with a longest span of 34 ft (10.4 m) and a deck 23 ft wide.

Who owns CR 305 over Unnamed Crk?

It is owned by the County Highway Agency.