US Bridges

Old Lemay Ferry RD over Rock CR

Fair

Jefferson County, Missouri · S 297 T 42 N R 5 E · Structure no. 16178

Built
1996
29 years old
Condition
Fair
inspected February 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
82 ft
1 main span
Daily traffic
3,740
2023 count
Owner
County
County Highway Agency

About this bridge

Old Lemay Ferry RD over Rock CR is a prestressed concrete box beam or girders - multiple carrying Old Lemay Ferry RD over Rock CR in Jefferson County, Missouri. It was built in 1996, so it is 29 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 3,740 vehicles a day, roughly 5% of them trucks, projected to reach 6,358 by 2043. The structure is 82 ft (25 m) long and 27 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Lemay Ferry RD
CrossesRock CR
LocationS 297 T 42 N R 5 E
RouteCounty Highway 0
CountyJefferson County
StateMissouri
Coordinates38.39908, -90.43712
Functional classUrban Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length82 ft (25 m)
Longest span81 ft (24.7 m)
Deck width27 ft (8.2 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,740 (2023)
Projected traffic6,358 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Old Lemay Ferry RD over Rock CR built?

It was built in 1996, making it 29 years old in 2025.

What condition is Old Lemay Ferry RD over Rock CR 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 2025.

How much traffic does Old Lemay Ferry RD over Rock CR carry?

About 3,740 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Old Lemay Ferry RD over Rock CR?

The structure is 82 ft (25 m) long with a longest span of 81 ft (24.7 m) and a deck 27 ft wide.

Who owns Old Lemay Ferry RD over Rock CR?

It is owned by the County Highway Agency.