US Bridges

County RD 34 over First Creek

Fair

Arapahoe County, Colorado · 2.5 MI E of County RD 217 · Structure no. ARA 34-56.3

Built
1950
75 years old, rebuilt 2020
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
40 ft
2 main spans
Daily traffic
129
2021 count
Owner
County
County Highway Agency

About this bridge

County RD 34 over First Creek is a steel continuous stringer/multi-beam or girder carrying County RD 34 over First Creek in Arapahoe County, Colorado. It was built in 1950 and reconstructed in 2020, 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.

It carries about 129 vehicles a day, projected to reach 157 by 2041. The structure is 40 ft (12.1 m) long and 30 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

Open in Google Maps
CarriesCounty RD 34
CrossesFirst Creek
Location2.5 MI E of County RD 217
RouteCounty Highway 0
CountyArapahoe County
StateColorado
Coordinates39.62404, -103.99651
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
Deck9 ExcellentNo problems noted.
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 inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating69 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length40 ft (12.1 m)
Longest span19 ft (5.7 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic129 (2021)
Projected traffic157 by 2041
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 34 over First Creek built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 2020.

What condition is County RD 34 over First Creek 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 2023.

How much traffic does County RD 34 over First Creek carry?

About 129 vehicles per day (2021 count).

How long is County RD 34 over First Creek?

The structure is 40 ft (12.1 m) long with a longest span of 19 ft (5.7 m) and a deck 30 ft wide.

Who owns County RD 34 over First Creek?

It is owned by the County Highway Agency.