US Bridges

US 136 E over Rock CR

Poor

Atchison County, Missouri · S 27 T 65 N R 41 W · Structure no. 2201

Built
1970
55 years old, rebuilt 1985
Condition
Poor
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
137 ft
3 main spans
Daily traffic
2,887
2024 count
Owner
State
State Highway Agency

About this bridge

US 136 E over Rock CR is a steel continuous stringer/multi-beam or girder carrying US 136 E over Rock CR in Atchison County, Missouri. It was built in 1970 and reconstructed in 1985, so it is 55 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,887 vehicles a day, roughly 24% of them trucks, projected to reach 6,063 by 2044. The structure is 137 ft (41.8 m) long and 43 ft wide. If it were closed, the detour would be 24.2 mi (39 km).

Location

Open in Google Maps
CarriesUS 136 E
CrossesRock CR
LocationS 27 T 65 N R 41 W
RouteU.S. Route 136
CountyAtchison County
StateMissouri
Coordinates40.41682, -95.51169
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
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 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 rating41.7 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length137 ft (41.8 m)
Longest span53 ft (16.2 m)
Deck width43 ft (13 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,887 (2024)
Projected traffic6,063 by 2044
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.2 mi (39 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 136 E over Rock CR built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 1985.

What condition is US 136 E over Rock CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does US 136 E over Rock CR carry?

About 2,887 vehicles per day (2024 count), of which roughly 24% are trucks.

How long is US 136 E over Rock CR?

The structure is 137 ft (41.8 m) long with a longest span of 53 ft (16.2 m) and a deck 43 ft wide.

Who owns US 136 E over Rock CR?

It is owned by the State Highway Agency.