US Bridges

Hover Road over Oligarchy Ditch

Fair

Boulder County, Colorado · 100 Ft S of 20th Street · Structure no. LONG-HOVER-20TH

Built
1990
35 years old
Condition
Fair
inspected January 2025
Type
Frame
Concrete
Length
31 ft
1 main span
Daily traffic
25,769
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hover Road over Oligarchy Ditch is a concrete frame carrying Hover Road over Oligarchy Ditch in Boulder County, Colorado. It was built in 1990, so it is 35 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 25,769 vehicles a day, roughly 10% of them trucks, projected to reach 30,923 by 2043. The structure is 31 ft (9.4 m) long and 91 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHover Road
CrossesOligarchy Ditch
Location100 Ft S of 20th Street
RouteCity Street 0
CountyBoulder County
StateColorado
Coordinates40.19297, -105.13077
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
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span29 ft (8.8 m)
Deck width91 ft (27.6 m)
Roadway width64 ft (19.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25,769 (2023)
Projected traffic30,923 by 2043
Trucks10%
Lanes on structure5
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 Hover Road over Oligarchy Ditch built?

It was built in 1990, making it 35 years old in 2025.

What condition is Hover Road over Oligarchy Ditch 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 Hover Road over Oligarchy Ditch carry?

About 25,769 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Hover Road over Oligarchy Ditch?

The structure is 31 ft (9.4 m) long with a longest span of 29 ft (8.8 m) and a deck 91 ft wide.

Who owns Hover Road over Oligarchy Ditch?

It is owned by the City or Municipal Highway Agency.