US Bridges

SH 470 Ml Wbnd over I 70 Ml

Fair

Jefferson County, Colorado · Jct. I70 & 470 · Structure no. F-16-KW

Built
1987
38 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
311 ft
2 main spans
Daily traffic
35,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 470 Ml Wbnd over I 70 Ml is a steel continuous stringer/multi-beam or girder carrying SH 470 Ml Wbnd over I 70 Ml in Jefferson County, Colorado. It was built in 1987, so it is 38 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 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 35,000 vehicles a day, roughly 2% of them trucks, projected to reach 46,900 by 2040. The structure is 311 ft (94.9 m) long and 79 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

CarriesSH 470 Ml Wbnd
CrossesI 70 Ml
LocationJct. I70 & 470
RouteU.S. Route 470A
Coordinates39.71276, -105.19443
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating104.6 US tons
Inventory rating17.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length311 ft (94.9 m)
Longest span155 ft (47.2 m)
Deck width79 ft (24.2 m)
Roadway width74 ft (22.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,000 (2020)
Projected traffic46,900 by 2040
Trucks2%
Lanes on structure4
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed62.1 mi (100 km)
TollOn a free road
National Highway SystemYes

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 SH 470 Ml Wbnd over I 70 Ml built?

It was built in 1987, making it 38 years old in 2025.

What condition is SH 470 Ml Wbnd over I 70 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 January 2024.

How much traffic does SH 470 Ml Wbnd over I 70 Ml carry?

About 35,000 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SH 470 Ml Wbnd over I 70 Ml?

The structure is 311 ft (94.9 m) long with a longest span of 155 ft (47.2 m) and a deck 79 ft wide.

Who owns SH 470 Ml Wbnd over I 70 Ml?

It is owned by the State Highway Agency.