US Bridges

County Road 130 over Middle Boulder Creek

Fair

Boulder County, Colorado · 2.5 MI W of ST HWY 72 · Structure no. BC-130-2.5-MB1

Built
1990
35 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete
Length
42 ft
1 main span
Daily traffic
742
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 130 over Middle Boulder Creek is a prestressed concrete box beam or girders - single or spread carrying County Road 130 over Middle Boulder Creek in Boulder County, Colorado. It was built in 1990, so it is 35 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 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 742 vehicles a day, roughly 10% of them trucks, projected to reach 891 by 2043. The structure is 42 ft (12.8 m) long and 34 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesCounty Road 130
CrossesMiddle Boulder Creek
Location2.5 MI W of ST HWY 72
RouteCounty Highway 0
CountyBoulder County
StateColorado
Coordinates39.94548, -105.55617
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
Deck8 Very GoodNo problems noted.
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 protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating21.4 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length42 ft (12.8 m)
Longest span37 ft (11.4 m)
Deck width34 ft (10.5 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic742 (2023)
Projected traffic891 by 2043
Trucks10%
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 130 over Middle Boulder Creek built?

It was built in 1990, making it 35 years old in 2025.

What condition is County Road 130 over Middle 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 January 2025.

How much traffic does County Road 130 over Middle Boulder Creek carry?

About 742 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County Road 130 over Middle Boulder Creek?

The structure is 42 ft (12.8 m) long with a longest span of 37 ft (11.4 m) and a deck 34 ft wide.

Who owns County Road 130 over Middle Boulder Creek?

It is owned by the County Highway Agency.