US Bridges

Eldridge Street over Ralston Creek | Ralston

Fair

Jefferson County, Colorado · 0.3 MI South of 72nd Ave · Structure no. ARVA-68-0.40-02

Built
1985
40 years old
Condition
Fair
inspected March 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
73 ft
1 main span
Daily traffic
2,152
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Eldridge Street over Ralston Creek | Ralston is a steel stringer/multi-beam or girder carrying Eldridge Street over Ralston Creek | Ralston in Jefferson County, Colorado. It was built in 1985, so it is 40 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 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 2,152 vehicles a day, roughly 2% of them trucks, projected to reach 2,475 by 2041. The structure is 73 ft (22.4 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesEldridge Street
CrossesRalston Creek | Ralston
Location0.3 MI South of 72nd Ave
RouteCity Street 0
CountyJefferson County
StateColorado
Coordinates39.82341, -105.15677
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMarch 2025
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 rating63.8 US tons
Inventory rating38.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length73 ft (22.4 m)
Longest span70 ft (21.3 m)
Deck width46 ft (14.1 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,152 (2021)
Projected traffic2,475 by 2041
Trucks2%
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 Eldridge Street over Ralston Creek | Ralston built?

It was built in 1985, making it 40 years old in 2025.

What condition is Eldridge Street over Ralston Creek | Ralston 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 March 2025.

How much traffic does Eldridge Street over Ralston Creek | Ralston carry?

About 2,152 vehicles per day (2021 count), of which roughly 2% are trucks.

How long is Eldridge Street over Ralston Creek | Ralston?

The structure is 73 ft (22.4 m) long with a longest span of 70 ft (21.3 m) and a deck 46 ft wide.

Who owns Eldridge Street over Ralston Creek | Ralston?

It is owned by the City or Municipal Highway Agency.