US Bridges

68th Avenue over Ralston Creek

Fair

Jefferson County, Colorado · 0.1 MI W of 67th Place · Structure no. ARVA-68-0.20-02

Built
1965
60 years old
Condition
Fair
inspected April 2023
Type
Culvert
Concrete
Length
22 ft
2 main spans
Daily traffic
585
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

68th Avenue over Ralston Creek is a concrete culvert carrying 68th Avenue over Ralston Creek in Jefferson County, Colorado. It was built in 1965, so it is 60 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 585 vehicles a day, roughly 4% of them trucks, projected to reach 673 by 2041. The structure is 22 ft (6.7 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Carries68th Avenue
CrossesRalston Creek
Location0.1 MI W of 67th Place
RouteCity Street 0
Coordinates39.81956, -105.1223
Functional classUrban 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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span10 ft (3.2 m)
Deck width52 ft (15.9 m)
Roadway width45 ft (13.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic585 (2021)
Projected traffic673 by 2041
Trucks4%
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 68th Avenue over Ralston Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is 68th Avenue over Ralston Creek 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 April 2023.

How much traffic does 68th Avenue over Ralston Creek carry?

About 585 vehicles per day (2021 count), of which roughly 4% are trucks.

How long is 68th Avenue over Ralston Creek?

The structure is 22 ft (6.7 m) long with a longest span of 10 ft (3.2 m) and a deck 52 ft wide.

Who owns 68th Avenue over Ralston Creek?

It is owned by the City or Municipal Highway Agency.