US Bridges

I-8 EB over 4th ST (giss Parkway)

Fair

Yuma County, Arizona · 1.7 MI N JCT US 95 · Structure no. 01322

Built
1969
56 years old
Condition
Fair
inspected January 2025
Type
Box Beam or Girders - Single or Spread
Concrete Continuous
Length
205 ft
2 main spans
Daily traffic
11,380
2021 count
Owner
State
State Highway Agency

About this bridge

I-8 EB over 4th ST (giss Parkway) is a concrete continuous box beam or girders - single or spread carrying I-8 EB over 4th ST (giss Parkway) in Yuma County, Arizona. It was built in 1969, so it is 56 years old, older 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 11,380 vehicles a day, roughly 15% of them trucks, projected to reach 11,390 by 2041. The structure is 205 ft (62.5 m) long and 41 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-8 EB
Crosses4th ST (giss Parkway)
Location1.7 MI N JCT US 95
RouteInterstate 8
CountyYuma County
StateArizona
Coordinates32.7221, -114.6136
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length205 ft (62.5 m)
Longest span104 ft (31.7 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,380 (2021)
Projected traffic11,390 by 2041
Trucks15%
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-8 EB over 4th ST (giss Parkway) built?

It was built in 1969, making it 56 years old in 2025.

What condition is I-8 EB over 4th ST (giss Parkway) 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 January 2025.

How much traffic does I-8 EB over 4th ST (giss Parkway) carry?

About 11,380 vehicles per day (2021 count), of which roughly 15% are trucks.

How long is I-8 EB over 4th ST (giss Parkway)?

The structure is 205 ft (62.5 m) long with a longest span of 104 ft (31.7 m) and a deck 41 ft wide.

Who owns I-8 EB over 4th ST (giss Parkway)?

It is owned by the State Highway Agency.