US Bridges

US 40 Ml over Big Muddy Creek

Fair

Grand County, Colorado · 8.7 MI SE of JCT SH 14 · Structure no. C-11-D

Built
1988
37 years old
Condition
Fair
inspected October 2022
Type
Culvert
Concrete
Length
30 ft
2 main spans
Daily traffic
2,300
2020 count
Owner
State
State Highway Agency

About this bridge

US 40 Ml over Big Muddy Creek is a concrete culvert carrying US 40 Ml over Big Muddy Creek in Grand County, Colorado. It was built in 1988, so it is 37 years old, younger 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 2,300 vehicles a day, roughly 14% of them trucks, projected to reach 2,622 by 2040. The structure is 30 ft (9.1 m) long and 94 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

CarriesUS 40 Ml
CrossesBig Muddy Creek
Location8.7 MI SE of JCT SH 14
RouteU.S. Route 40A
Coordinates40.28976, -106.48013
Functional classRural Principal Arterial - Other

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 48 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 rating45.9 US tons
Inventory rating27.4 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span13 ft (4 m)
Deck width94 ft (28.8 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2020)
Projected traffic2,622 by 2040
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 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 Big Muddy Creek built?

It was built in 1988, making it 37 years old in 2025.

What condition is US 40 Ml over Big Muddy 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 October 2022.

How much traffic does US 40 Ml over Big Muddy Creek carry?

About 2,300 vehicles per day (2020 count), of which roughly 14% are trucks.

How long is US 40 Ml over Big Muddy Creek?

The structure is 30 ft (9.1 m) long with a longest span of 13 ft (4 m) and a deck 94 ft wide.

Who owns US 40 Ml over Big Muddy Creek?

It is owned by the State Highway Agency.