US Bridges

County Road 31 over Evans Ditch No. 2

Fair

Weld County, Colorado · 0.5 MI N of CO RD 36 · Structure no. WEL031.0-036.0B

Built
1973
52 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Prestressed Concrete
Length
31 ft
1 main span
Daily traffic
145
2022 count
Owner
County
County Highway Agency

About this bridge

County Road 31 over Evans Ditch No. 2 is a prestressed concrete tee beam carrying County Road 31 over Evans Ditch No. 2 in Weld County, Colorado. It was built in 1973, so it is 52 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 5 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 145 vehicles a day, roughly 41% of them trucks, projected to reach 206 by 2042. The structure is 31 ft (9.3 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesCounty Road 31
CrossesEvans Ditch No. 2
Location0.5 MI N of CO RD 36
RouteCounty Highway 0
CountyWeld County
StateColorado
Coordinates40.25364, -104.773
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadUnknown
Structure length31 ft (9.3 m)
Longest span29 ft (8.9 m)
Deck width30 ft (9.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic145 (2022)
Projected traffic206 by 2042
Trucks41%
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 County Road 31 over Evans Ditch No. 2 built?

It was built in 1973, making it 52 years old in 2025.

What condition is County Road 31 over Evans Ditch No. 2 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 March 2024.

How much traffic does County Road 31 over Evans Ditch No. 2 carry?

About 145 vehicles per day (2022 count), of which roughly 41% are trucks.

How long is County Road 31 over Evans Ditch No. 2?

The structure is 31 ft (9.3 m) long with a longest span of 29 ft (8.9 m) and a deck 30 ft wide.

Who owns County Road 31 over Evans Ditch No. 2?

It is owned by the County Highway Agency.