US Bridges

Colorado Blvd over SH 470 Ml

Fair

Douglas County, Colorado · 5.1 M E of JCT US 85 · Structure no. F-17-HR

Built
1984
41 years old
Condition
Fair
inspected March 2025
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
233 ft
2 main spans
Daily traffic
15,746
2024 count
Owner
State
State Highway Agency

About this bridge

Colorado Blvd over SH 470 Ml is a prestressed concrete continuous box beam or girders - multiple carrying Colorado Blvd over SH 470 Ml in Douglas County, Colorado. It was built in 1984, so it is 41 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 15,746 vehicles a day, roughly 2% of them trucks, projected to reach 21,100 by 2044. The structure is 233 ft (70.9 m) long and 68 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesColorado Blvd
CrossesSH 470 Ml
Location5.1 M E of JCT US 85
RouteCity Street 0
Coordinates39.56073, -104.94184
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.
Last inspectionMarch 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.5 US tons
Inventory rating42.3 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length233 ft (70.9 m)
Longest span118 ft (36 m)
Deck width68 ft (20.8 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,746 (2024)
Projected traffic21,100 by 2044
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Colorado Blvd over SH 470 Ml built?

It was built in 1984, making it 41 years old in 2025.

What condition is Colorado Blvd over SH 470 Ml 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 Colorado Blvd over SH 470 Ml carry?

About 15,746 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is Colorado Blvd over SH 470 Ml?

The structure is 233 ft (70.9 m) long with a longest span of 118 ft (36 m) and a deck 68 ft wide.

Who owns Colorado Blvd over SH 470 Ml?

It is owned by the State Highway Agency.