US Bridges

Swan Mountain RD over Blue River

Fair

Summit County, Colorado · 0.2 Mile East of Highway · Structure no. 117000100.2004A

Built
1993
32 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
46 ft
4 main spans
Daily traffic
3,594
2021 count
Owner
County
County Highway Agency

About this bridge

Swan Mountain RD over Blue River is a concrete culvert carrying Swan Mountain RD over Blue River in Summit County, Colorado. It was built in 1993, so it is 32 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 5 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 3,594 vehicles a day, roughly 4% of them trucks, projected to reach 4,385 by 2041. The structure is 46 ft (14 m) long and 52 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

Open in Google Maps
CarriesSwan Mountain RD
CrossesBlue River
Location0.2 Mile East of Highway
RouteCounty Highway 0
CountySummit County
StateColorado
Coordinates39.56666, -106.04954
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating86.3 US tons
Inventory rating51.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length46 ft (14 m)
Longest span10 ft (3 m)
Deck width52 ft (16 m)
Roadway width43 ft (13.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,594 (2021)
Projected traffic4,385 by 2041
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 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 Swan Mountain RD over Blue River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Swan Mountain RD over Blue River 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 2024.

How much traffic does Swan Mountain RD over Blue River carry?

About 3,594 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is Swan Mountain RD over Blue River?

The structure is 46 ft (14 m) long with a longest span of 10 ft (3 m) and a deck 52 ft wide.

Who owns Swan Mountain RD over Blue River?

It is owned by the County Highway Agency.