US Bridges

SH 318 Ml over Sandwash Creek

Good

Moffat County, Colorado · 11.4 MI W of Sunbeam · Structure no. B-03-G

Built
1978
47 years old
Condition
Good
inspected April 2024
Type
Culvert
Concrete
Length
32 ft
3 main spans
Daily traffic
180
2020 count
Owner
State
State Highway Agency

About this bridge

SH 318 Ml over Sandwash Creek is a concrete culvert carrying SH 318 Ml over Sandwash Creek in Moffat County, Colorado. It was built in 1978, so it is 47 years old, older 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 180 vehicles a day, roughly 13% of them trucks, projected to reach 254 by 2040. The structure is 32 ft (9.8 m) long and 50 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesSH 318 Ml
CrossesSandwash Creek
Location11.4 MI W of Sunbeam
RouteState Highway 318A
Coordinates40.62015, -108.36852
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.1 US tons
Inventory rating43.5 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span12 ft (3.7 m)
Deck width50 ft (15.2 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic180 (2020)
Projected traffic254 by 2040
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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 318 Ml over Sandwash Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is SH 318 Ml over Sandwash Creek 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 April 2024.

How much traffic does SH 318 Ml over Sandwash Creek carry?

About 180 vehicles per day (2020 count), of which roughly 13% are trucks.

How long is SH 318 Ml over Sandwash Creek?

The structure is 32 ft (9.8 m) long with a longest span of 12 ft (3.7 m) and a deck 50 ft wide.

Who owns SH 318 Ml over Sandwash Creek?

It is owned by the State Highway Agency.