Structure B-16-BL · Larimer County, CO

I 25 Frontage RD over Larimer County Canal SR

Carries I 25 Frontage RD over Larimer County Canal SR, 5 Mi N Of Jct 14/e Of I25.

Overall conditionFair

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

How ratings work
Deck7/9 · Good
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT33 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 6/9 · sets the ratingSubstructure 6/9 · sets the rating

33 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.

Built196660 years old
Length33.5 ft10.2 m
Daily traffic4,395counted 2023
Last inspectedMarch 2023every 24 months

Location

StateColorado
CountyLarimer
Location5 Mi N Of Jct 14/e Of I25
CarriesI 25 Frontage RD
CrossesLarimer County Canal SR
Coordinates40.65587, -105.00050

Physical Characteristics

MaterialConcrete
DesignTee Beam
Total Length33.5 ft (10.2 m)
Max Span29.9 ft (9.1 m)
Deck Width26.9 ft (8.2 m)
Deck Area83.6 sq m
Main Spans1
Year Built1966

Traffic

Avg Daily Traffic4,395 (2023)
Truck Traffic19%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure NumberB-16-BL

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.

Nearby Bridges