US Bridges

US 40 Ml WB over Fortification Creek

Fair

Moffat County, Colorado · In Craig · Structure no. B-06-A

Built
1952
73 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
109 ft
2 main spans
Daily traffic
3,000
2020 count
Owner
State
State Highway Agency

About this bridge

US 40 Ml WB over Fortification Creek is a steel stringer/multi-beam or girder carrying US 40 Ml WB over Fortification Creek in Moffat County, Colorado. It was built in 1952, so it is 73 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 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 3,000 vehicles a day, roughly 3% of them trucks, projected to reach 3,060 by 2040. The structure is 109 ft (33.1 m) long and 40 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesUS 40 Ml WB
CrossesFortification Creek
LocationIn Craig
RouteU.S. Route 40Z
Coordinates40.51419, -107.54179
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating25 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadH 20
Structure length109 ft (33.1 m)
Longest span50 ft (15.2 m)
Deck width40 ft (12.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,000 (2020)
Projected traffic3,060 by 2040
Trucks3%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$427,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 40 Ml WB over Fortification Creek built?

It was built in 1952, making it 73 years old in 2025.

What condition is US 40 Ml WB over Fortification 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 WB over Fortification Creek carry?

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

How long is US 40 Ml WB over Fortification Creek?

The structure is 109 ft (33.1 m) long with a longest span of 50 ft (15.2 m) and a deck 40 ft wide.

Who owns US 40 Ml WB over Fortification Creek?

It is owned by the State Highway Agency.