US Bridges

County Road 3400 over Smith Fork

Fair

Delta County, Colorado · .7 MI S Grandview Mesa RD · Structure no. DEL3400D-1.0-50

Built
1973
52 years old, rebuilt 2011
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
26 ft
1 main span
Daily traffic
71
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 3400 over Smith Fork is a steel stringer/multi-beam or girder carrying County Road 3400 over Smith Fork in Delta County, Colorado. It was built in 1973 and reconstructed in 2011, so it is 52 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. Its operating status is: open, posting recommended but not legally implemented.

It carries about 71 vehicles a day, projected to reach 80 by 2042. The structure is 26 ft (7.8 m) long and 24 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesCounty Road 3400
CrossesSmith Fork
Location.7 MI S Grandview Mesa RD
RouteCounty Highway 0
CountyDelta County
StateColorado
Coordinates38.70744, -107.71014
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, posting recommended but not legally implemented
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating38.1 US tons
Inventory rating22.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length26 ft (7.8 m)
Longest span23 ft (7.1 m)
Deck width24 ft (7.3 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic71 (2022)
Projected traffic80 by 2042
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 3400 over Smith Fork built?

It was built in 1973, making it 52 years old in 2025. It was reconstructed in 2011.

What condition is County Road 3400 over Smith Fork 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 September 2023.

How much traffic does County Road 3400 over Smith Fork carry?

About 71 vehicles per day (2022 count).

How long is County Road 3400 over Smith Fork?

The structure is 26 ft (7.8 m) long with a longest span of 23 ft (7.1 m) and a deck 24 ft wide.

Who owns County Road 3400 over Smith Fork?

It is owned by the County Highway Agency.