US Bridges

County RD 3A.7 over Big Sandy Creek Tributar

FairPosted for load

Lincoln County, Colorado · Just East of Road 34 · Structure no. LIN-3A.7-34.1

Built
1960
65 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
38 ft
2 main spans
Daily traffic
19
2020 count
Owner
County
County Highway Agency

About this bridge

County RD 3A.7 over Big Sandy Creek Tributar is a wood or timber stringer/multi-beam or girder carrying County RD 3A.7 over Big Sandy Creek Tributar in Lincoln County, Colorado. It was built in 1960, so it is 65 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 19 vehicles a day, projected to reach 24 by 2040. The structure is 38 ft (11.7 m) long and 20 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesCounty RD 3A.7
CrossesBig Sandy Creek Tributar
LocationJust East of Road 34
RouteCounty Highway 0
CountyLincoln County
StateColorado
Coordinates39.1969, -103.43625
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
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 protection7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating14.4 US tons
Inventory rating9.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans2
Design loadUnknown
Structure length38 ft (11.7 m)
Longest span18 ft (5.4 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19 (2020)
Projected traffic24 by 2040
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 RD 3A.7 over Big Sandy Creek Tributar built?

It was built in 1960, making it 65 years old in 2025.

What condition is County RD 3A.7 over Big Sandy Creek Tributar 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 May 2023.

How much traffic does County RD 3A.7 over Big Sandy Creek Tributar carry?

About 19 vehicles per day (2020 count).

How long is County RD 3A.7 over Big Sandy Creek Tributar?

The structure is 38 ft (11.7 m) long with a longest span of 18 ft (5.4 m) and a deck 20 ft wide.

Who owns County RD 3A.7 over Big Sandy Creek Tributar?

It is owned by the County Highway Agency.