US Bridges

Calhoun-Byers Road over Bijou Creek

Poor

Adams County, Colorado · 0.40 MI N of 72nd Ave · Structure no. ADA46N-076.0163

Built
1965
60 years old
Condition
Poor
inspected November 2024
Type
Tee Beam
Prestressed Concrete
Length
360 ft
6 main spans
Daily traffic
165
2021 count
Owner
County
County Highway Agency

About this bridge

Calhoun-Byers Road over Bijou Creek is a prestressed concrete tee beam carrying Calhoun-Byers Road over Bijou Creek in Adams County, Colorado. It was built in 1965, so it is 60 years old, older than the Colorado average of 42.2 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 165 vehicles a day, roughly 5% of them trucks, projected to reach 215 by 2041. The structure is 360 ft (109.7 m) long and 24 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCalhoun-Byers Road
CrossesBijou Creek
Location0.40 MI N of 72nd Ave
RouteCounty Highway 0
Coordinates39.83189, -104.18876
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating36 US tons
Inventory rating27 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans6
Design loadUnknown
Structure length360 ft (109.7 m)
Longest span58 ft (17.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic165 (2021)
Projected traffic215 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Calhoun-Byers Road over Bijou Creek built?

It was built in 1965, making it 60 years old in 2025.

What condition is Calhoun-Byers Road over Bijou Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Calhoun-Byers Road over Bijou Creek carry?

About 165 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is Calhoun-Byers Road over Bijou Creek?

The structure is 360 ft (109.7 m) long with a longest span of 58 ft (17.7 m) and a deck 24 ft wide.

Who owns Calhoun-Byers Road over Bijou Creek?

It is owned by the County Highway Agency.