US Bridges

Service Road over Mill Creek SR

Fair

Clear Creek County, Colorado · 3.1 MI E of JCT US 40 · Structure no. E-14-O

Built
1934
91 years old
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
1,081
2024 count
Owner
State
State Highway Agency

About this bridge

Service Road over Mill Creek SR is a steel stringer/multi-beam or girder carrying Service Road over Mill Creek SR in Clear Creek County, Colorado. It was built in 1934, so it is 91 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 1,081 vehicles a day, roughly 8% of them trucks, projected to reach 1,351 by 2044. The structure is 32 ft (9.8 m) long and 38 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesService Road
CrossesMill Creek SR
Location3.1 MI E of JCT US 40
RouteInterstate 70A
CountyClear Creek County
StateColorado
Coordinates39.76483, -105.60172
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating45.5 US tons
Inventory rating27.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,081 (2024)
Projected traffic1,351 by 2044
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Service Road over Mill Creek SR built?

It was built in 1934, making it 91 years old in 2025.

What condition is Service Road over Mill Creek SR 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 August 2023.

How much traffic does Service Road over Mill Creek SR carry?

About 1,081 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is Service Road over Mill Creek SR?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 38 ft wide.

Who owns Service Road over Mill Creek SR?

It is owned by the State Highway Agency.