US Bridges

County Road M46 over Gurley Ditch

FairPosted for load

San Miguel County, Colorado · 1.5 MI E of Beaver Park · Structure no. SMGH47-0.6-3

Built
1956
69 years old
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
31 ft
1 main span
Daily traffic
17
2022 count
Owner
County
County Highway Agency

About this bridge

County Road M46 over Gurley Ditch is a wood or timber stringer/multi-beam or girder carrying County Road M46 over Gurley Ditch in San Miguel County, Colorado. It was built in 1956, so it is 69 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. Its operating status is: posted for load restriction.

It carries about 17 vehicles a day, projected to reach 19 by 2042. The structure is 31 ft (9.5 m) long and 15 ft wide. If it were closed, the detour would be 19.3 mi (31 km).

Location

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CarriesCounty Road M46
CrossesGurley Ditch
Location1.5 MI E of Beaver Park
RouteCounty Highway 0
CountySan Miguel County
StateColorado
Coordinates37.91656, -108.19489
Functional classRural Local

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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating58.8 US tons
Inventory rating43.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length31 ft (9.5 m)
Longest span28 ft (8.4 m)
Deck width15 ft (4.7 m)
Roadway width13 ft (4.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic17 (2022)
Projected traffic19 by 2042
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.3 mi (31 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$123,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road M46 over Gurley Ditch built?

It was built in 1956, making it 69 years old in 2025.

What condition is County Road M46 over Gurley Ditch 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 June 2024.

How much traffic does County Road M46 over Gurley Ditch carry?

About 17 vehicles per day (2022 count).

How long is County Road M46 over Gurley Ditch?

The structure is 31 ft (9.5 m) long with a longest span of 28 ft (8.4 m) and a deck 15 ft wide.

Who owns County Road M46 over Gurley Ditch?

It is owned by the County Highway Agency.