US Bridges

County Road 397 over Arkansas River

Good

Chaffee County, Colorado · At Granite · Structure no. CHA397-00.03A

Built
2024
1 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
85
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 397 over Arkansas River is a steel stringer/multi-beam or girder carrying County Road 397 over Arkansas River in Chaffee County, Colorado. It was built in 2024, so it is 1 years old, younger than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 85 vehicles a day, projected to reach 114 by 2042. The structure is 80 ft (24.4 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty Road 397
CrossesArkansas River
LocationAt Granite
RouteCounty Highway 0
CountyChaffee County
StateColorado
Coordinates39.0432, -106.2658
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.
Substructure9 ExcellentNo problems noted.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating48.6 US tons
Inventory rating37.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHL 93
Structure length80 ft (24.4 m)
Longest span78 ft (23.8 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic85 (2022)
Projected traffic114 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 397 over Arkansas River built?

It was built in 2024, making it 1 years old in 2025.

What condition is County Road 397 over Arkansas River 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 August 2024.

How much traffic does County Road 397 over Arkansas River carry?

About 85 vehicles per day (2022 count).

How long is County Road 397 over Arkansas River?

The structure is 80 ft (24.4 m) long with a longest span of 78 ft (23.8 m) and a deck 16 ft wide.

Who owns County Road 397 over Arkansas River?

It is owned by the County Highway Agency.