US Bridges

SH 470 Ml over Massey DRAW/C470 Trail

Fair

Jefferson County, Colorado · .75 MI E of JCT SH 121 · Structure no. F-16-HY

Built
1968
57 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
72,000
2020 count
Owner
State
State Highway Agency

About this bridge

SH 470 Ml over Massey DRAW/C470 Trail is a concrete culvert carrying SH 470 Ml over Massey DRAW/C470 Trail in Jefferson County, Colorado. It was built in 1968, so it is 57 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 72,000 vehicles a day, roughly 2% of them trucks, projected to reach 94,320 by 2040. The structure is 29 ft (8.8 m) long and 258 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesSH 470 Ml
CrossesMassey DRAW/C470 Trail
Location.75 MI E of JCT SH 121
RouteState Highway 470A
Coordinates39.55876, -105.07704
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable 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 loadHS 20
Structure length29 ft (8.8 m)
Longest span14 ft (4.3 m)
Deck width258 ft (78.7 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic72,000 (2020)
Projected traffic94,320 by 2040
Trucks2%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 over Massey DRAW/C470 Trail built?

It was built in 1968, making it 57 years old in 2025.

What condition is SH 470 Ml over Massey DRAW/C470 Trail 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 over Massey DRAW/C470 Trail carry?

About 72,000 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SH 470 Ml over Massey DRAW/C470 Trail?

The structure is 29 ft (8.8 m) long with a longest span of 14 ft (4.3 m) and a deck 258 ft wide.

Who owns SH 470 Ml over Massey DRAW/C470 Trail?

It is owned by the State Highway Agency.