US Bridges

Idaho Maryland RD over Wolf Creek

Fair

Nevada County, California · 0.5 MI W of Brunswick · Structure no. 17C0070

Built
1977
48 years old
Condition
Fair
inspected August 2023
Type
Slab
Concrete
Length
37 ft
1 main span
Daily traffic
6,604
2011 count
Owner
City
City or Municipal Highway Agency

About this bridge

Idaho Maryland RD over Wolf Creek is a concrete slab carrying Idaho Maryland RD over Wolf Creek in Nevada County, California. It was built in 1977, so it is 48 years old, younger than the California average of 54.8 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 6,604 vehicles a day, roughly 3% of them trucks, projected to reach 4,026 by 2043. The structure is 37 ft (11.3 m) long and 34 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesIdaho Maryland RD
CrossesWolf Creek
Location0.5 MI W of Brunswick
RouteCity Street 0
CountyNevada County
StateCalifornia
Coordinates39.22435, -121.03542
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 protection7 GoodSome minor problems.
Last inspectionAugust 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89.6 US tons
Inventory rating69.3 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length37 ft (11.3 m)
Longest span34 ft (10.5 m)
Deck width34 ft (10.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,604 (2011)
Projected traffic4,026 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Idaho Maryland RD over Wolf Creek built?

It was built in 1977, making it 48 years old in 2025.

What condition is Idaho Maryland RD over Wolf 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 August 2023.

How much traffic does Idaho Maryland RD over Wolf Creek carry?

About 6,604 vehicles per day (2011 count), of which roughly 3% are trucks.

How long is Idaho Maryland RD over Wolf Creek?

The structure is 37 ft (11.3 m) long with a longest span of 34 ft (10.5 m) and a deck 34 ft wide.

Who owns Idaho Maryland RD over Wolf Creek?

It is owned by the City or Municipal Highway Agency.