US Bridges

State Route 1 over N Arm Newport Bay

Fair

Orange County, California · 12-ORA-001-R18.22-NPTB · Structure no. 55 0614

Built
1981
44 years old
Condition
Fair
inspected June 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
840 ft
8 main spans
Daily traffic
51,000
2014 count
Owner
State
State Highway Agency

About this bridge

State Route 1 over N Arm Newport Bay is a prestressed concrete continuous box beam or girders - multiple carrying State Route 1 over N Arm Newport Bay in Orange County, California. It was built in 1981, so it is 44 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 51,000 vehicles a day, projected to reach 68,226 by 2040. The structure is 840 ft (256 m) long and 116 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesState Route 1
CrossesN Arm Newport Bay
Location12-ORA-001-R18.22-NPTB
RouteState Highway 1
CountyOrange County
StateCalifornia
Coordinates33.61679, -117.90335
Functional classUrban Other Principal 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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans8
Design loadHS 20 + Mod
Structure length840 ft (256 m)
Longest span120 ft (36.6 m)
Deck width116 ft (35.4 m)
Roadway width98 ft (29.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic51,000 (2014)
Projected traffic68,226 by 2040
Trucks0%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was State Route 1 over N Arm Newport Bay built?

It was built in 1981, making it 44 years old in 2025.

What condition is State Route 1 over N Arm Newport Bay 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 June 2023.

How much traffic does State Route 1 over N Arm Newport Bay carry?

About 51,000 vehicles per day (2014 count).

How long is State Route 1 over N Arm Newport Bay?

The structure is 840 ft (256 m) long with a longest span of 120 ft (36.6 m) and a deck 116 ft wide.

Who owns State Route 1 over N Arm Newport Bay?

It is owned by the State Highway Agency.