US Bridges

SH 291 Ml over CR 150 Arkansas River

Poor

Chaffee County, Colorado · 1.3 MI NW of Salida · Structure no. J-12-AK

Built
1959
66 years old
Condition
Poor
inspected December 2023
Type
Truss - Thru
Steel
Length
267 ft
1 main span
Daily traffic
4,300
2020 count
Owner
State
State Highway Agency

About this bridge

SH 291 Ml over CR 150 Arkansas River is a steel truss - thru carrying SH 291 Ml over CR 150 Arkansas River in Chaffee County, Colorado. It was built in 1959, so it is 66 years old, older than the Colorado average of 42.2 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 4,300 vehicles a day, roughly 7% of them trucks, projected to reach 4,386 by 2040. The structure is 267 ft (81.4 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSH 291 Ml
CrossesCR 150 Arkansas River
Location1.3 MI NW of Salida
RouteState Highway 291A
Coordinates38.54627, -106.00915
Functional classUrban Minor Arterial

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
Deck7 GoodSome minor problems.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.4 US tons
Inventory rating34.4 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length267 ft (81.4 m)
Longest span103 ft (31.4 m)
Deck width31 ft (9.5 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,300 (2020)
Projected traffic4,386 by 2040
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was SH 291 Ml over CR 150 Arkansas River built?

It was built in 1959, making it 66 years old in 2025.

What condition is SH 291 Ml over CR 150 Arkansas River 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 December 2023.

How much traffic does SH 291 Ml over CR 150 Arkansas River carry?

About 4,300 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is SH 291 Ml over CR 150 Arkansas River?

The structure is 267 ft (81.4 m) long with a longest span of 103 ft (31.4 m) and a deck 31 ft wide.

Who owns SH 291 Ml over CR 150 Arkansas River?

It is owned by the State Highway Agency.