US Bridges

County Road 31 over Beaver Creek Lower Plat

FairPosted for load

Morgan County, Colorado · 0.4 MI North of US HWY 6 · Structure no. MG31-0.4-S6

Built
1950
75 years old, rebuilt 1965
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
37
2023 count
Owner
County
County Highway Agency

About this bridge

County Road 31 over Beaver Creek Lower Plat is a steel stringer/multi-beam or girder carrying County Road 31 over Beaver Creek Lower Plat in Morgan County, Colorado. It was built in 1950 and reconstructed in 1965, so it is 75 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. Its operating status is: posted for load restriction.

It carries about 37 vehicles a day, roughly 38% of them trucks, projected to reach 47 by 2043. The structure is 33 ft (10.1 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road 31
CrossesBeaver Creek Lower Plat
Location0.4 MI North of US HWY 6
RouteCounty Highway 0
Coordinates40.29728, -103.56505
Functional classRural 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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating15 US tons
Inventory rating2.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width28 ft (8.6 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic37 (2023)
Projected traffic47 by 2043
Trucks38%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$972,000 (2018 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was County Road 31 over Beaver Creek Lower Plat built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1965.

What condition is County Road 31 over Beaver Creek Lower Plat 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 November 2024.

How much traffic does County Road 31 over Beaver Creek Lower Plat carry?

About 37 vehicles per day (2023 count), of which roughly 38% are trucks.

How long is County Road 31 over Beaver Creek Lower Plat?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 28 ft wide.

Who owns County Road 31 over Beaver Creek Lower Plat?

It is owned by the County Highway Agency.