US Bridges

Lock Access Road over Canton Creek

Fair

Lewis County, Missouri · L/D No. 20 Canton Mo · Structure no. CEPNCRMO-000003

Built
1937
88 years old
Condition
Fair
inspected August 2024
Type
Arch - Deck
Concrete
Length
117 ft
1 main span
Daily traffic
100
2020 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

Lock Access Road over Canton Creek is a concrete arch - deck carrying Lock Access Road over Canton Creek in Lewis County, Missouri. It was built in 1937, so it is 88 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.

It carries about 100 vehicles a day, roughly 5% of them trucks, projected to reach 100 by 2041. The structure is 117 ft (35.6 m) long and 23 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesLock Access Road
CrossesCanton Creek
LocationL/D No. 20 Canton Mo
RouteFederal Lands Road 0
CountyLewis County
StateMissouri
Coordinates40.14052, -91.51601
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43.2 US tons
Inventory rating33.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length117 ft (35.6 m)
Longest span100 ft (30.5 m)
Deck width23 ft (7 m)
Roadway width20 ft (6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic100 by 2041
Trucks5%
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

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusHistorical significance not determinable at this time
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$98,000 (2024 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Lock Access Road over Canton Creek built?

It was built in 1937, making it 88 years old in 2025.

What condition is Lock Access Road over Canton Creek 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 August 2024.

How much traffic does Lock Access Road over Canton Creek carry?

About 100 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Lock Access Road over Canton Creek?

The structure is 117 ft (35.6 m) long with a longest span of 100 ft (30.5 m) and a deck 23 ft wide.

Who owns Lock Access Road over Canton Creek?

It is owned by the Corps of Engineers (Civil).