US Bridges

SH 103 Ml over Chicago Creek

Good

Clear Creek County, Colorado · 1 MI So of JCT I 70 Ml · Structure no. F-14-Q

Built
1958
67 years old
Condition
Good
inspected August 2023
Type
Culvert
Concrete
Length
32 ft
2 main spans
Daily traffic
2,300
2020 count
Owner
State
State Highway Agency

About this bridge

SH 103 Ml over Chicago Creek is a concrete culvert carrying SH 103 Ml over Chicago Creek in Clear Creek County, Colorado. It was built in 1958, so it is 67 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,300 vehicles a day, roughly 2% of them trucks, projected to reach 3,013 by 2040. The structure is 32 ft (9.8 m) long and 51 ft wide. If it were closed, the detour would be 39.8 mi (64 km).

CarriesSH 103 Ml
CrossesChicago Creek
Location1 MI So of JCT I 70 Ml
RouteState Highway 103A
Coordinates39.73224, -105.53466
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 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
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating33.3 US tons
Inventory rating20 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadH 20
Structure length32 ft (9.8 m)
Longest span16 ft (5 m)
Deck width51 ft (15.5 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,300 (2020)
Projected traffic3,013 by 2040
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed39.8 mi (64 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 SH 103 Ml over Chicago Creek built?

It was built in 1958, making it 67 years old in 2025.

What condition is SH 103 Ml over Chicago Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does SH 103 Ml over Chicago Creek carry?

About 2,300 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is SH 103 Ml over Chicago Creek?

The structure is 32 ft (9.8 m) long with a longest span of 16 ft (5 m) and a deck 51 ft wide.

Who owns SH 103 Ml over Chicago Creek?

It is owned by the State Highway Agency.