US Bridges

County RD 41G over N. Fork Big Thompson R.

Good

Larimer County, Colorado · N of CR 43 · Structure no. LR41G-0.0-43

Built
2016
9 years old
Condition
Good
inspected May 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
674
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 41G over N. Fork Big Thompson R. is a prestressed concrete box beam or girders - multiple carrying County RD 41G over N. Fork Big Thompson R. in Larimer County, Colorado. It was built in 2016, so it is 9 years old, younger 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 674 vehicles a day, roughly 24% of them trucks, projected to reach 843 by 2042. The structure is 60 ft (18.3 m) long and 28 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesCounty RD 41G
CrossesN. Fork Big Thompson R.
LocationN of CR 43
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.43364, -105.3458
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than 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 alignment8: Equal to present desirable criteria
Operating rating42.9 US tons
Inventory rating32.2 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length60 ft (18.3 m)
Longest span54 ft (16.5 m)
Deck width28 ft (8.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic674 (2023)
Projected traffic843 by 2042
Trucks24%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 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 RD 41G over N. Fork Big Thompson R. built?

It was built in 2016, making it 9 years old in 2025.

What condition is County RD 41G over N. Fork Big Thompson R. 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 May 2023.

How much traffic does County RD 41G over N. Fork Big Thompson R. carry?

About 674 vehicles per day (2023 count), of which roughly 24% are trucks.

How long is County RD 41G over N. Fork Big Thompson R.?

The structure is 60 ft (18.3 m) long with a longest span of 54 ft (16.5 m) and a deck 28 ft wide.

Who owns County RD 41G over N. Fork Big Thompson R.?

It is owned by the County Highway Agency.