US Bridges

CR 1.5 (briggs St) over Lower Boulder Ditch

Fair

Weld County, Colorado · 0.4 M N of CO RD 8.5 · Structure no. ERI001.5_008.5A

Built
1999
26 years old
Condition
Fair
inspected February 2024
Type
Culvert
Concrete
Length
24 ft
1 main span
Daily traffic
2,608
2023 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

CR 1.5 (briggs St) over Lower Boulder Ditch is a concrete culvert carrying CR 1.5 (briggs St) over Lower Boulder Ditch in Weld County, Colorado. It was built in 1999, so it is 26 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 2,608 vehicles a day, roughly 10% of them trucks, projected to reach 3,703 by 2042. The structure is 24 ft (7.4 m) long and 37 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesCR 1.5 (briggs St)
CrossesLower Boulder Ditch
Location0.4 M N of CO RD 8.5
RouteCity Street 0
CountyWeld County
StateColorado
Coordinates40.05379, -105.04744
Functional classUrban 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
Channel and channel protection8 Very GoodNo problems noted.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46.2 US tons
Inventory rating27.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span24 ft (7.4 m)
Deck width37 ft (11.2 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,608 (2023)
Projected traffic3,703 by 2042
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 CR 1.5 (briggs St) over Lower Boulder Ditch built?

It was built in 1999, making it 26 years old in 2025.

What condition is CR 1.5 (briggs St) over Lower Boulder Ditch 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 February 2024.

How much traffic does CR 1.5 (briggs St) over Lower Boulder Ditch carry?

About 2,608 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is CR 1.5 (briggs St) over Lower Boulder Ditch?

The structure is 24 ft (7.4 m) long with a longest span of 24 ft (7.4 m) and a deck 37 ft wide.

Who owns CR 1.5 (briggs St) over Lower Boulder Ditch?

It is owned by the Town or Township Highway Agency.