US Bridges

County Line Road over Big Dry Creek

Fair

Arapahoe County, Colorado · .3 MI West of Holly · Structure no. DOU08E-01.28

Built
2002
23 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete
Length
44 ft
4 main spans
Daily traffic
31,430
2020 count
Owner
County
County Highway Agency

About this bridge

County Line Road over Big Dry Creek is a concrete culvert carrying County Line Road over Big Dry Creek in Arapahoe County, Colorado. It was built in 2002, so it is 23 years old, younger 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 31,430 vehicles a day, roughly 5% of them trucks, projected to reach 42,116 by 2040. The structure is 44 ft (13.3 m) long and 95 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesCounty Line Road
CrossesBig Dry Creek
Location.3 MI West of Holly
RouteCounty Highway 0
CountyArapahoe County
StateColorado
Coordinates39.5661, -104.92924
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadHS 20
Structure length44 ft (13.3 m)
Longest span10 ft (3.1 m)
Deck width95 ft (29 m)
Roadway width52 ft (16 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,430 (2020)
Projected traffic42,116 by 2040
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Line Road over Big Dry Creek built?

It was built in 2002, making it 23 years old in 2025.

What condition is County Line Road over Big Dry 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 January 2025.

How much traffic does County Line Road over Big Dry Creek carry?

About 31,430 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is County Line Road over Big Dry Creek?

The structure is 44 ft (13.3 m) long with a longest span of 10 ft (3.1 m) and a deck 95 ft wide.

Who owns County Line Road over Big Dry Creek?

It is owned by the County Highway Agency.