US Bridges

Gregory Street over Gregory Gulch

Fair

Gilpin County, Colorado · 0.01 MI West of SH119 · Structure no. BLKHWK-GREGORY

Built
1933
92 years old, rebuilt 1997
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
50 ft
1 main span
Daily traffic
3,289
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gregory Street over Gregory Gulch is a concrete slab carrying Gregory Street over Gregory Gulch in Gilpin County, Colorado. It was built in 1933 and reconstructed in 1997, so it is 92 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 3,289 vehicles a day, roughly 8% of them trucks, projected to reach 3,947 by 2040. The structure is 50 ft (15.1 m) long and 420 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesGregory Street
CrossesGregory Gulch
Location0.01 MI West of SH119
RouteCity Street 0
Coordinates39.80145, -105.49481
Functional classRural Minor Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating28.9 US tons
Inventory rating17.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length50 ft (15.1 m)
Longest span50 ft (15.1 m)
Deck width420 ft (128 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,289 (2020)
Projected traffic3,947 by 2040
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Gregory Street over Gregory Gulch built?

It was built in 1933, making it 92 years old in 2025. It was reconstructed in 1997.

What condition is Gregory Street over Gregory Gulch 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 April 2023.

How much traffic does Gregory Street over Gregory Gulch carry?

About 3,289 vehicles per day (2020 count), of which roughly 8% are trucks.

How long is Gregory Street over Gregory Gulch?

The structure is 50 ft (15.1 m) long with a longest span of 50 ft (15.1 m) and a deck 420 ft wide.

Who owns Gregory Street over Gregory Gulch?

It is owned by the City or Municipal Highway Agency.