US Bridges

County RD NW 1000 over Trib of Monegaw CR

Good

St. Clair County, Missouri · S 4 T 39 N R 28 W · Structure no. 32534

Built
2007
18 years old
Condition
Good
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
57 ft
1 main span
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

County RD NW 1000 over Trib of Monegaw CR is a steel stringer/multi-beam or girder carrying County RD NW 1000 over Trib of Monegaw CR in St. Clair County, Missouri. It was built in 2007, so it is 18 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 48 by 2043. The structure is 57 ft (17.5 m) long and 21 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesCounty RD NW 1000
CrossesTrib of Monegaw CR
LocationS 4 T 39 N R 28 W
RouteCounty Highway 185
CountySt. Clair County
StateMissouri
Coordinates38.17531, -94.01214
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating84.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.5 m)
Longest span55 ft (16.9 m)
Deck width21 ft (6.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic48 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byOther Local 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 NW 1000 over Trib of Monegaw CR built?

It was built in 2007, making it 18 years old in 2025.

What condition is County RD NW 1000 over Trib of Monegaw CR 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 December 2023.

How much traffic does County RD NW 1000 over Trib of Monegaw CR carry?

About 40 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD NW 1000 over Trib of Monegaw CR?

The structure is 57 ft (17.5 m) long with a longest span of 55 ft (16.9 m) and a deck 21 ft wide.

Who owns County RD NW 1000 over Trib of Monegaw CR?

It is owned by the County Highway Agency and maintained by the Other Local Agency.