US Bridges

County RD 450 over Dtch No 1

Fair

Scott County, Missouri · S 28 T 27 N R 13 E · Structure no. 16617

Built
1964
61 years old, rebuilt 1988
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
66 ft
3 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 450 over Dtch No 1 is a prestressed concrete box beam or girders - multiple carrying County RD 450 over Dtch No 1 in Scott County, Missouri. It was built in 1964 and reconstructed in 1988, so it is 61 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 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2043. The structure is 66 ft (20.1 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesCounty RD 450
CrossesDtch No 1
LocationS 28 T 27 N R 13 E
RouteCounty Highway 127
CountyScott County
StateMissouri
Coordinates36.9588, -89.65924
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 10
Structure length66 ft (20.1 m)
Longest span25 ft (7.6 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic35 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 450 over Dtch No 1 built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1988.

What condition is County RD 450 over Dtch No 1 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 2025.

How much traffic does County RD 450 over Dtch No 1 carry?

About 25 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 450 over Dtch No 1?

The structure is 66 ft (20.1 m) long with a longest span of 25 ft (7.6 m) and a deck 24 ft wide.

Who owns County RD 450 over Dtch No 1?

It is owned by the County Highway Agency.