US Bridges

US 40 Ml over Fish Creek

Fair

Routt County, Colorado · In Steamboat Springs · Structure no. C-09-AT

Built
1980
45 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
42 ft
3 main spans
Daily traffic
28,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 40 Ml over Fish Creek is a concrete culvert carrying US 40 Ml over Fish Creek in Routt County, Colorado. It was built in 1980, so it is 45 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 28,000 vehicles a day, roughly 3% of them trucks, projected to reach 32,760 by 2040. The structure is 42 ft (12.7 m) long and 130 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 40 Ml
CrossesFish Creek
LocationIn Steamboat Springs
RouteU.S. Route 40A
Coordinates40.4665, -106.8259
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52.7 US tons
Inventory rating31.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length42 ft (12.7 m)
Longest span15 ft (4.7 m)
Deck width130 ft (39.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,000 (2020)
Projected traffic32,760 by 2040
Trucks3%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 Ml over Fish Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is US 40 Ml over Fish Creek 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 April 2024.

How much traffic does US 40 Ml over Fish Creek carry?

About 28,000 vehicles per day (2020 count), of which roughly 3% are trucks.

How long is US 40 Ml over Fish Creek?

The structure is 42 ft (12.7 m) long with a longest span of 15 ft (4.7 m) and a deck 130 ft wide.

Who owns US 40 Ml over Fish Creek?

It is owned by the State Highway Agency.