US Bridges

Baseline Road over Sossaman Ditch

Fair

Maricopa County, Arizona · 200 E/Sossaman · Structure no. 09690

Built
1968
57 years old, rebuilt 1993
Condition
Fair
inspected July 2023
Type
Culvert
Concrete Continuous
Length
43 ft
4 main spans
Daily traffic
14,588
2019 count
Owner
City
City or Municipal Highway Agency

About this bridge

Baseline Road over Sossaman Ditch is a concrete continuous culvert carrying Baseline Road over Sossaman Ditch in Maricopa County, Arizona. It was built in 1968 and reconstructed in 1993, so it is 57 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 14,588 vehicles a day, roughly 2% of them trucks, projected to reach 14,598 by 2039. The structure is 43 ft (13.1 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesBaseline Road
CrossesSossaman Ditch
Location200 E/Sossaman
RouteCity Street 0
StateArizona
Coordinates33.3793, -111.6666
Functional classUrban Minor 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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans4
Design loadHS 20
Structure length43 ft (13.1 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deck25 ft (7.6 m)

Traffic and service

Average daily traffic14,588 (2019)
Projected traffic14,598 by 2039
Trucks2%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 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 Baseline Road over Sossaman Ditch built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 1993.

What condition is Baseline Road over Sossaman Ditch 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 2023.

How much traffic does Baseline Road over Sossaman Ditch carry?

About 14,588 vehicles per day (2019 count), of which roughly 2% are trucks.

How long is Baseline Road over Sossaman Ditch?

The structure is 43 ft (13.1 m) long with a longest span of 10 ft (3 m).

Who owns Baseline Road over Sossaman Ditch?

It is owned by the City or Municipal Highway Agency.