US Bridges

Grand Avenue over North Fork Gunnison Rvr

Fair

Delta County, Colorado · 0.4 MI S of JCT SH 133 · Structure no. I-06-C

Built
1955
70 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
232 ft
4 main spans
Daily traffic
2,165
2022 count
Owner
County
County Highway Agency

About this bridge

Grand Avenue over North Fork Gunnison Rvr is a steel continuous stringer/multi-beam or girder carrying Grand Avenue over North Fork Gunnison Rvr in Delta County, Colorado. It was built in 1955, so it is 70 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.

It carries about 2,165 vehicles a day, roughly 7% of them trucks, projected to reach 2,446 by 2042. The structure is 232 ft (70.8 m) long and 34 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesGrand Avenue
CrossesNorth Fork Gunnison Rvr
Location0.4 MI S of JCT SH 133
RouteCounty Highway 0
CountyDelta County
StateColorado
Coordinates38.87389, -107.59766
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
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 rating59.6 US tons
Inventory rating46.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length232 ft (70.8 m)
Longest span61 ft (18.6 m)
Deck width34 ft (10.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,165 (2022)
Projected traffic2,446 by 2042
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 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 Grand Avenue over North Fork Gunnison Rvr built?

It was built in 1955, making it 70 years old in 2025.

What condition is Grand Avenue over North Fork Gunnison Rvr 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 Grand Avenue over North Fork Gunnison Rvr carry?

About 2,165 vehicles per day (2022 count), of which roughly 7% are trucks.

How long is Grand Avenue over North Fork Gunnison Rvr?

The structure is 232 ft (70.8 m) long with a longest span of 61 ft (18.6 m) and a deck 34 ft wide.

Who owns Grand Avenue over North Fork Gunnison Rvr?

It is owned by the County Highway Agency.