US Bridges

County RD 329 over Otter CR

Good

Monroe County, Missouri · S 20 T 55 N R 9 W · Structure no. 32541

Built
2009
16 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
156 ft
3 main spans
Daily traffic
25
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 329 over Otter CR is a prestressed concrete continuous stringer/multi-beam or girder carrying County RD 329 over Otter CR in Monroe County, Missouri. It was built in 2009, so it is 16 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 31 by 2043. The structure is 156 ft (47.4 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesCounty RD 329
CrossesOtter CR
LocationS 20 T 55 N R 9 W
RouteCounty Highway 446
CountyMonroe County
StateMissouri
Coordinates39.53869, -91.92975
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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, precast panels
Main spans3
Design loadHS 20
Structure length156 ft (47.4 m)
Longest span72 ft (21.8 m)
Deck width25 ft (7.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2023)
Projected traffic31 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 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 329 over Otter CR built?

It was built in 2009, making it 16 years old in 2025.

What condition is County RD 329 over Otter 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 May 2024.

How much traffic does County RD 329 over Otter CR carry?

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

How long is County RD 329 over Otter CR?

The structure is 156 ft (47.4 m) long with a longest span of 72 ft (21.8 m) and a deck 25 ft wide.

Who owns County RD 329 over Otter CR?

It is owned by the County Highway Agency.