US Bridges

Outer RD I29 over Mill CR

Good

Atchison County, Missouri · S 2 T 63 N R 41 W · Structure no. 33832

Built
2010
15 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
35
2024 count
Owner
County
County Highway Agency

About this bridge

Outer RD I29 over Mill CR is a steel stringer/multi-beam or girder carrying Outer RD I29 over Mill CR in Atchison County, Missouri. It was built in 2010, so it is 15 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 35 vehicles a day, roughly 10% of them trucks, projected to reach 40 by 2044. The structure is 80 ft (24.4 m) long and 25 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesOuter RD I29
CrossesMill CR
LocationS 2 T 63 N R 41 W
RouteCounty Highway 438
Coordinates40.30032, -95.48519
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2024
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 alignment8: Equal to present desirable criteria
Operating rating48.6 US tons
Inventory rating28.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length80 ft (24.4 m)
Longest span80 ft (24.4 m)
Deck width25 ft (7.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35 (2024)
Projected traffic40 by 2044
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 Outer RD I29 over Mill CR built?

It was built in 2010, making it 15 years old in 2025.

What condition is Outer RD I29 over Mill 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 February 2024.

How much traffic does Outer RD I29 over Mill CR carry?

About 35 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Outer RD I29 over Mill CR?

The structure is 80 ft (24.4 m) long with a longest span of 80 ft (24.4 m) and a deck 25 ft wide.

Who owns Outer RD I29 over Mill CR?

It is owned by the County Highway Agency.