US Bridges

US 275 S over Mapes Br

Fair

Atchison County, Missouri · S 12 T 66 N R 42 W · Structure no. 5302

Built
1929
96 years old
Condition
Fair
inspected September 2023
Type
Tee Beam
Concrete
Length
88 ft
3 main spans
Daily traffic
296
2024 count
Owner
State
State Highway Agency

About this bridge

US 275 S over Mapes Br is a concrete tee beam carrying US 275 S over Mapes Br in Atchison County, Missouri. It was built in 1929, so it is 96 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 5 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 296 vehicles a day, roughly 24% of them trucks, projected to reach 385 by 2044. The structure is 88 ft (26.8 m) long and 23 ft wide. If it were closed, the detour would be 49.1 mi (79 km).

Location

Open in Google Maps
CarriesUS 275 S
CrossesMapes Br
LocationS 12 T 66 N R 42 W
RouteU.S. Route 275
CountyAtchison County
StateMissouri
Coordinates40.54332, -95.61297
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length88 ft (26.8 m)
Longest span32 ft (9.9 m)
Deck width23 ft (7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic296 (2024)
Projected traffic385 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed49.1 mi (79 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 275 S over Mapes Br built?

It was built in 1929, making it 96 years old in 2025.

What condition is US 275 S over Mapes Br 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 September 2023.

How much traffic does US 275 S over Mapes Br carry?

About 296 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is US 275 S over Mapes Br?

The structure is 88 ft (26.8 m) long with a longest span of 32 ft (9.9 m) and a deck 23 ft wide.

Who owns US 275 S over Mapes Br?

It is owned by the State Highway Agency.