US Bridges

Rose Hall Way over Big Thompson River

Fair

Larimer County, Colorado · 35 Ft S of US HWY 34 · Structure no. LRB8-1530BTC

Built
1977
48 years old
Condition
Fair
inspected May 2023
Type
Tee Beam
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
11
2023 count
Owner
County
County Highway Agency

About this bridge

Rose Hall Way over Big Thompson River is a prestressed concrete tee beam carrying Rose Hall Way over Big Thompson River in Larimer County, Colorado. It was built in 1977, so it is 48 years old, older 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 11 vehicles a day, roughly 6% of them trucks, projected to reach 14 by 2042. The structure is 50 ft (15.2 m) long and 12 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesRose Hall Way
CrossesBig Thompson River
Location35 Ft S of US HWY 34
RouteCounty Highway 0
CountyLarimer County
StateColorado
Coordinates40.43075, -105.32686
Functional classRural Principal Arterial - Other

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 inspectionMay 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating36 US tons
Inventory rating19.3 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11 (2023)
Projected traffic14 by 2042
Trucks6%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$589,000 (2019 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Rose Hall Way over Big Thompson River built?

It was built in 1977, making it 48 years old in 2025.

What condition is Rose Hall Way over Big Thompson River 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 May 2023.

How much traffic does Rose Hall Way over Big Thompson River carry?

About 11 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Rose Hall Way over Big Thompson River?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 12 ft wide.

Who owns Rose Hall Way over Big Thompson River?

It is owned by the County Highway Agency and maintained by the Other Local Agency.