US Bridges

6th Street over Blue River

Fair

Summit County, Colorado · At Intersection With SH 9 · Structure no. SILVTH-6THST

Built
1981
44 years old
Condition
Fair
inspected September 2024
Type
Culvert
Concrete
Length
103 ft
8 main spans
Daily traffic
2,091
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

6th Street over Blue River is a concrete culvert carrying 6th Street over Blue River in Summit County, Colorado. It was built in 1981, so it is 44 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 2,091 vehicles a day, roughly 9% of them trucks, projected to reach 2,551 by 2040. The structure is 103 ft (31.4 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries6th Street
CrossesBlue River
LocationAt Intersection With SH 9
RouteCity Street 0
Coordinates39.63556, -106.0756
Functional classUrban 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 protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no 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 alignment8: Equal to present desirable criteria
Operating rating77.2 US tons
Inventory rating45.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans8
Design loadUnknown
Structure length103 ft (31.4 m)
Longest span12 ft (3.7 m)
Deck width49 ft (14.9 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,091 (2020)
Projected traffic2,551 by 2040
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 6th Street over Blue River built?

It was built in 1981, making it 44 years old in 2025.

What condition is 6th Street 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 6th Street over Blue River carry?

About 2,091 vehicles per day (2020 count), of which roughly 9% are trucks.

How long is 6th Street over Blue River?

The structure is 103 ft (31.4 m) long with a longest span of 12 ft (3.7 m) and a deck 49 ft wide.

Who owns 6th Street over Blue River?

It is owned by the City or Municipal Highway Agency.