US Bridges

County RD 420 over Drain Dtch

Good

Scott County, Missouri · S 28 T 28 N R 12 E · Structure no. 31318

Built
2001
24 years old
Condition
Good
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
73 ft
1 main span
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 420 over Drain Dtch is a steel stringer/multi-beam or girder carrying County RD 420 over Drain Dtch in Scott County, Missouri. It was built in 2001, so it is 24 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 25 vehicles a day, roughly 10% of them trucks, projected to reach 35 by 2043. The structure is 73 ft (22.1 m) long and 18 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesCounty RD 420
CrossesDrain Dtch
LocationS 28 T 28 N R 12 E
RouteCounty Highway 420
Coordinates37.05284, -89.75369
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating59.5 US tons
Inventory rating35.7 US tons

Structure

MaterialSteel
DeckOther
Main spans1
Design loadUnknown
Structure length73 ft (22.1 m)
Longest span55 ft (16.9 m)
Deck width18 ft (5.6 m)
Roadway width17 ft (5.3 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 closed8.7 mi (14 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 County RD 420 over Drain Dtch built?

It was built in 2001, making it 24 years old in 2025.

What condition is County RD 420 over Drain Dtch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2025.

How much traffic does County RD 420 over Drain Dtch carry?

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

How long is County RD 420 over Drain Dtch?

The structure is 73 ft (22.1 m) long with a longest span of 55 ft (16.9 m) and a deck 18 ft wide.

Who owns County RD 420 over Drain Dtch?

It is owned by the County Highway Agency.