US Bridges

County Road 116 over Boulder Creek

Fair

Boulder County, Colorado · 3.3 MI West of ST HWY 72 · Structure no. BC-116-3.3-BO1

Built
1995
30 years old
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
28 ft
1 main span
Daily traffic
74
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 116 over Boulder Creek is a wood or timber stringer/multi-beam or girder carrying County Road 116 over Boulder Creek in Boulder County, Colorado. It was built in 1995, so it is 30 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 74 vehicles a day, roughly 25% of them trucks, projected to reach 89 by 2042. The structure is 28 ft (8.4 m) long and 14 ft wide. If it were closed, the detour would be 62.1 mi (100 km).

Location

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CarriesCounty Road 116
CrossesBoulder Creek
Location3.3 MI West of ST HWY 72
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates40.01166, -105.55549
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39.9 US tons
Inventory rating27.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 20
Structure length28 ft (8.4 m)
Longest span25 ft (7.6 m)
Deck width14 ft (4.3 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic74 (2023)
Projected traffic89 by 2042
Trucks25%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed62.1 mi (100 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 116 over Boulder Creek built?

It was built in 1995, making it 30 years old in 2025.

What condition is County Road 116 over 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 July 2023.

How much traffic does County Road 116 over Boulder Creek carry?

About 74 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is County Road 116 over Boulder Creek?

The structure is 28 ft (8.4 m) long with a longest span of 25 ft (7.6 m) and a deck 14 ft wide.

Who owns County Road 116 over Boulder Creek?

It is owned by the County Highway Agency.