US Bridges

Smith Road over SB Quebec ST | NB Quebec

Fair

Denver County, Colorado · 0.5 MI South of I70 · Structure no. D-04-BOST-030

Built
1971
54 years old, rebuilt 1998
Condition
Fair
inspected November 2024
Type
Box Beam or Girders - Multiple
Concrete Continuous
Length
184 ft
2 main spans
Daily traffic
5,770
2021 count
Owner
City
City or Municipal Highway Agency

About this bridge

Smith Road over SB Quebec ST | NB Quebec is a concrete continuous box beam or girders - multiple carrying Smith Road over SB Quebec ST | NB Quebec in Denver County, Colorado. It was built in 1971 and reconstructed in 1998, so it is 54 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.

It carries about 5,770 vehicles a day, roughly 7% of them trucks, projected to reach 6,405 by 2041. The structure is 184 ft (56.2 m) long and 64 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSmith Road
CrossesSB Quebec ST | NB Quebec
Location0.5 MI South of I70
RouteCity Street 0
CountyDenver County
StateColorado
Coordinates39.7718, -104.90328
Functional classUrban Minor Arterial

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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating24.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length184 ft (56.2 m)
Longest span92 ft (28 m)
Deck width64 ft (19.5 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,770 (2021)
Projected traffic6,405 by 2041
Trucks7%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.1 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith Road over SB Quebec ST | NB Quebec built?

It was built in 1971, making it 54 years old in 2025. It was reconstructed in 1998.

What condition is Smith Road over SB Quebec ST | NB Quebec 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 November 2024.

How much traffic does Smith Road over SB Quebec ST | NB Quebec carry?

About 5,770 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Smith Road over SB Quebec ST | NB Quebec?

The structure is 184 ft (56.2 m) long with a longest span of 92 ft (28 m) and a deck 64 ft wide.

Who owns Smith Road over SB Quebec ST | NB Quebec?

It is owned by the City or Municipal Highway Agency.