US Bridges

Fdr 112 over South ST Vrain Creek

Fair

Boulder County, Colorado · 5.75 MI West of CO HWY 72 · Structure no. 021004000001202

Built
1989
36 years old
Condition
Fair
inspected September 2024
Type
Slab
Prestressed Concrete
Length
41 ft
1 main span
Daily traffic
50
2024 count
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 112 over South ST Vrain Creek is a prestressed concrete slab carrying Fdr 112 over South ST Vrain Creek in Boulder 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 50 vehicles a day, projected to reach 301 by 2012. The structure is 41 ft (12.6 m) long and 20 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesFdr 112
CrossesSouth ST Vrain Creek
Location5.75 MI West of CO HWY 72
RouteFederal Lands Road 112.1
CountyBoulder County
StateColorado
Coordinates40.07831, -105.57254
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating55 US tons
Inventory rating42.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadH 15
Structure length41 ft (12.6 m)
Longest span40 ft (12.3 m)
Deck width20 ft (6.2 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic301 by 2012
Trucks—
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost$54 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Fdr 112 over South ST Vrain Creek built?

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

What condition is Fdr 112 over South ST Vrain 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 September 2024.

How much traffic does Fdr 112 over South ST Vrain Creek carry?

About 50 vehicles per day (2024 count).

How long is Fdr 112 over South ST Vrain Creek?

The structure is 41 ft (12.6 m) long with a longest span of 40 ft (12.3 m) and a deck 20 ft wide.

Who owns Fdr 112 over South ST Vrain Creek?

It is owned by the U.S. Forest Service.