US Bridges

North Bush Street over Orrs Creek

Poor

Mendocino County, California · 0.2 MI S of Low Gap RD · Structure no. 10C0001

Built
1972
53 years old
Condition
Poor
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
4,692
2017 count
Owner
City
City or Municipal Highway Agency

About this bridge

North Bush Street over Orrs Creek is a steel stringer/multi-beam or girder carrying North Bush Street over Orrs Creek in Mendocino County, California. It was built in 1972, so it is 53 years old, younger than the California average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 4,692 vehicles a day, roughly 1% of them trucks, projected to reach 10,421 by 2042. The structure is 62 ft (18.9 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNorth Bush Street
CrossesOrrs Creek
Location0.2 MI S of Low Gap RD
RouteCity Street 0
Coordinates39.15679, -123.21335
Functional classUrban Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, 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 inspectionFebruary 2024
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 geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.5 US tons
Inventory rating46.4 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length62 ft (18.9 m)
Longest span58 ft (17.6 m)
Deck width58 ft (17.6 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,692 (2017)
Projected traffic10,421 by 2042
Trucks1%
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was North Bush Street over Orrs Creek built?

It was built in 1972, making it 53 years old in 2025.

What condition is North Bush Street over Orrs Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in February 2024.

How much traffic does North Bush Street over Orrs Creek carry?

About 4,692 vehicles per day (2017 count), of which roughly 1% are trucks.

How long is North Bush Street over Orrs Creek?

The structure is 62 ft (18.9 m) long with a longest span of 58 ft (17.6 m) and a deck 58 ft wide.

Who owns North Bush Street over Orrs Creek?

It is owned by the City or Municipal Highway Agency.