US Bridges

County Road 16 | E over South Boulder Creek

Fair

Gilpin County, Colorado · 1.0 MI W of SH 119 · Structure no. GL16-W1.0-S119A

Built
1989
36 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
45 ft
1 main span
Daily traffic
379
2020 count
Owner
County
County Highway Agency

About this bridge

County Road 16 | E over South Boulder Creek is a steel stringer/multi-beam or girder carrying County Road 16 | E over South Boulder Creek in Gilpin County, Colorado. It was built in 1989, so it is 36 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 379 vehicles a day, projected to reach 455 by 2040. The structure is 45 ft (13.8 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCounty Road 16 | E
CrossesSouth Boulder Creek
Location1.0 MI W of SH 119
RouteCounty Highway 0
CountyGilpin County
StateColorado
Coordinates39.91587, -105.52009
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating56.7 US tons
Inventory rating34 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length45 ft (13.8 m)
Longest span42 ft (12.9 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic379 (2020)
Projected traffic455 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County Road 16 | E over South Boulder Creek built?

It was built in 1989, making it 36 years old in 2025.

What condition is County Road 16 | E over South Boulder Creek 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 April 2023.

How much traffic does County Road 16 | E over South Boulder Creek carry?

About 379 vehicles per day (2020 count).

How long is County Road 16 | E over South Boulder Creek?

The structure is 45 ft (13.8 m) long with a longest span of 42 ft (12.9 m) and a deck 28 ft wide.

Who owns County Road 16 | E over South Boulder Creek?

It is owned by the County Highway Agency.