US Bridges

Slate Creek RD over Blue River

FairPosted for load

Summit County, Colorado · 0.4 MI West of Highway 9 · Structure no. 117145000.40005

Built
1923
102 years old, rebuilt 1951
Condition
Fair
inspected September 2024
Type
Truss - Thru
Steel
Length
104 ft
1 main span
Daily traffic
13
2020 count
Owner
County
County Highway Agency

About this bridge

Slate Creek RD over Blue River is a steel truss - thru carrying Slate Creek RD over Blue River in Summit County, Colorado. It was built in 1923 and reconstructed in 1951, so it is 102 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: posted for load restriction.

It carries about 13 vehicles a day, projected to reach 15 by 2040. The structure is 104 ft (31.7 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesSlate Creek RD
CrossesBlue River
Location0.4 MI West of Highway 9
RouteCounty Highway 0
CountySummit County
StateColorado
Coordinates39.78353, -106.16239
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating20.6 US tons
Inventory rating12.3 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length104 ft (31.7 m)
Longest span99 ft (30.1 m)
Deck width22 ft (6.6 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13 (2020)
Projected traffic15 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Slate Creek RD over Blue River built?

It was built in 1923, making it 102 years old in 2025. It was reconstructed in 1951.

What condition is Slate Creek 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 Slate Creek RD over Blue River carry?

About 13 vehicles per day (2020 count).

How long is Slate Creek RD over Blue River?

The structure is 104 ft (31.7 m) long with a longest span of 99 ft (30.1 m) and a deck 22 ft wide.

Who owns Slate Creek RD over Blue River?

It is owned by the County Highway Agency.