Structure LR29-0.0-22H · Larimer County, CO

County Road 29 over Big Thompson River

Carries County Road 29 over Big Thompson River, Junction With Co RD 22h.

Overall conditionFair

Set by its lowest-rated component: Superstructure at 6 of 9.

How ratings work
Deck8/9 · Very Good
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT77 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 6/9 · sets the ratingSubstructure 7/9

77 ft end to end. Lengths and the car on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a tee-beam bridge.

Built1978rebuilt 2012
Length77.1 ft23.5 m
Daily traffic332counted 2023
Last inspectedMay 2023every 24 months

Location

StateColorado
CountyLarimer
LocationJunction With Co RD 22h
CarriesCounty Road 29
CrossesBig Thompson River
Coordinates40.42555, -105.21236

Physical Characteristics

MaterialPrestressed Concrete
DesignTee Beam
Total Length77.1 ft (23.5 m)
Max Span73.2 ft (22.3 m)
Deck Width34.1 ft (10.4 m)
Deck Area244.4 sq m
Main Spans1
Year Built1978 (reconstructed 2012)

Traffic

Avg Daily Traffic332 (2023)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical5 — Stable for scour
Structure NumberLR29-0.0-22H

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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