US Bridges

I 17 SB over Lake Mary RD

Fair

Coconino County, Arizona · 0.3 MI S JCT I-40 · Structure no. 02556

Built
2002
23 years old
Condition
Fair
inspected July 2024
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
178 ft
2 main spans
Daily traffic
21,045
2022 count
Owner
State
State Highway Agency

About this bridge

I 17 SB over Lake Mary RD is a prestressed concrete continuous box beam or girders - single or spread carrying I 17 SB over Lake Mary RD in Coconino County, Arizona. It was built in 2002, so it is 23 years old, younger than the Arizona average of 47.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 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 21,045 vehicles a day, roughly 24% of them trucks, projected to reach 21,055 by 2042. The structure is 178 ft (54.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 17 SB
CrossesLake Mary RD
Location0.3 MI S JCT I-40
RouteInterstate 17
CountyCoconino County
StateArizona
Coordinates35.169, -111.6657
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating95 US tons
Inventory rating46 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length178 ft (54.3 m)
Longest span87 ft (26.5 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic21,045 (2022)
Projected traffic21,055 by 2042
Trucks24%
Lanes on structure2
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I 17 SB over Lake Mary RD built?

It was built in 2002, making it 23 years old in 2025.

What condition is I 17 SB over Lake Mary RD 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 July 2024.

How much traffic does I 17 SB over Lake Mary RD carry?

About 21,045 vehicles per day (2022 count), of which roughly 24% are trucks.

How long is I 17 SB over Lake Mary RD?

The structure is 178 ft (54.3 m) long with a longest span of 87 ft (26.5 m) and a deck 44 ft wide.

Who owns I 17 SB over Lake Mary RD?

It is owned by the State Highway Agency.