US Bridges

County Road Gg over Trib. of Surveyor Creek

Good

Washington County, Colorado · 0.55 MI N. of CO RD 41 · Structure no. WTNGG-41.55

Built
1960
65 years old
Condition
Good
inspected October 2023
Type
Arch - Deck
Steel
Length
21 ft
1 main span
Daily traffic
18
2023 count
Owner
County
County Highway Agency

About this bridge

County Road Gg over Trib. of Surveyor Creek is a steel arch - deck carrying County Road Gg over Trib. of Surveyor Creek in Washington 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 18 vehicles a day, roughly 29% of them trucks, projected to reach 22 by 2042. The structure is 21 ft (6.4 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesCounty Road Gg
CrossesTrib. of Surveyor Creek
Location0.55 MI N. of CO RD 41
RouteCounty Highway 0
Coordinates40.17172, -103.13528
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating26.6 US tons
Inventory rating19.6 US tons

Structure

Structure typeArch - Deck
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span21 ft (6.4 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic18 (2023)
Projected traffic22 by 2042
Trucks29%
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 Gg over Trib. of Surveyor Creek built?

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

What condition is County Road Gg over Trib. of Surveyor Creek in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does County Road Gg over Trib. of Surveyor Creek carry?

About 18 vehicles per day (2023 count), of which roughly 29% are trucks.

How long is County Road Gg over Trib. of Surveyor Creek?

The structure is 21 ft (6.4 m) long with a longest span of 21 ft (6.4 m) and a deck 30 ft wide.

Who owns County Road Gg over Trib. of Surveyor Creek?

It is owned by the County Highway Agency.