US Bridges

Dimond Blvd over Dimond Blvd Oc

Fair

Anchorage Municipality, Alaska · Mile Point 1.8 · Structure no. 1433

Built
1985
40 years old
Condition
Fair
inspected August 2023
Type
Tee Beam
Prestressed Concrete
Length
230 ft
2 main spans
Daily traffic
23,400
2020 count
Owner
State
State Highway Agency

About this bridge

Dimond Blvd over Dimond Blvd Oc is a prestressed concrete tee beam carrying Dimond Blvd over Dimond Blvd Oc in Anchorage Municipality, Alaska. It was built in 1985, so it is 40 years old, older than the Alaska average of 35.9 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 23,400 vehicles a day, roughly 2% of them trucks, projected to reach 27,400 by 2039. The structure is 230 ft (70.1 m) long and 133 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDimond Blvd
CrossesDimond Blvd Oc
LocationMile Point 1.8
RouteState Highway 520
CountyAnchorage Municipality
StateAlaska
Coordinates61.14028, -149.90833
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment9: Superior to present desirable criteria
Operating rating68.8 US tons
Inventory rating27.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckOther
Main spans2
Design loadHS 20
Structure length230 ft (70.1 m)
Longest span113 ft (34.4 m)
Deck width133 ft (40.6 m)
Roadway width114 ft (34.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,400 (2020)
Projected traffic27,400 by 2039
Trucks2%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Dimond Blvd over Dimond Blvd Oc built?

It was built in 1985, making it 40 years old in 2025.

What condition is Dimond Blvd over Dimond Blvd Oc 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 Dimond Blvd over Dimond Blvd Oc carry?

About 23,400 vehicles per day (2020 count), of which roughly 2% are trucks.

How long is Dimond Blvd over Dimond Blvd Oc?

The structure is 230 ft (70.1 m) long with a longest span of 113 ft (34.4 m) and a deck 133 ft wide.

Who owns Dimond Blvd over Dimond Blvd Oc?

It is owned by the State Highway Agency.