US Bridges

Olympia Avenue over Spring Gulch

Good

Boulder County, Colorado · 200 Feet E of Boise Court · Structure no. LONG-OLYM-BOISE

Built
2000
25 years old
Condition
Good
inspected January 2025
Type
Culvert
Concrete
Length
44 ft
3 main spans
Daily traffic
1,207
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Olympia Avenue over Spring Gulch is a concrete culvert carrying Olympia Avenue over Spring Gulch in Boulder County, Colorado. It was built in 2000, so it is 25 years old, younger 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 1,207 vehicles a day, roughly 7% of them trucks, projected to reach 1,449 by 2043. The structure is 44 ft (13.4 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesOlympia Avenue
CrossesSpring Gulch
Location200 Feet E of Boise Court
RouteCity Street 0
CountyBoulder County
StateColorado
Coordinates40.19942, -105.07883
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating67.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span14 ft (4.3 m)
Deck width52 ft (15.7 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,207 (2023)
Projected traffic1,449 by 2043
Trucks7%
Lanes on structure2
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

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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Olympia Avenue over Spring Gulch built?

It was built in 2000, making it 25 years old in 2025.

What condition is Olympia Avenue over Spring Gulch 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 January 2025.

How much traffic does Olympia Avenue over Spring Gulch carry?

About 1,207 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Olympia Avenue over Spring Gulch?

The structure is 44 ft (13.4 m) long with a longest span of 14 ft (4.3 m) and a deck 52 ft wide.

Who owns Olympia Avenue over Spring Gulch?

It is owned by the City or Municipal Highway Agency.