US Bridges

Third Avenue over Town Ditch

Good

Kittitas County, Washington · 00.29 E Pfenning RD · Structure no. 080415000000000

Built
1971
54 years old
Condition
Good
inspected November 2024
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
28 ft
1 main span
Daily traffic
631
2023 count
Owner
County
County Highway Agency

About this bridge

Third Avenue over Town Ditch is a concrete continuous stringer/multi-beam or girder carrying Third Avenue over Town Ditch in Kittitas County, Washington. It was built in 1971, so it is 54 years old, older than the Washington average of 49.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 631 vehicles a day, roughly 11% of them trucks, projected to reach 1,672 by 2043. The structure is 28 ft (8.5 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesThird Avenue
CrossesTown Ditch
Location00.29 E Pfenning RD
RouteCounty Highway 69910
Coordinates46.99613, -120.51247
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating36 US tons

Structure

MaterialConcrete Continuous
DeckOther
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span27 ft (8.2 m)
Deck width28 ft (8.4 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic631 (2023)
Projected traffic1,672 by 2043
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Third Avenue over Town Ditch built?

It was built in 1971, making it 54 years old in 2025.

What condition is Third Avenue over Town Ditch in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in November 2024.

How much traffic does Third Avenue over Town Ditch carry?

About 631 vehicles per day (2023 count), of which roughly 11% are trucks.

How long is Third Avenue over Town Ditch?

The structure is 28 ft (8.5 m) long with a longest span of 27 ft (8.2 m) and a deck 28 ft wide.

Who owns Third Avenue over Town Ditch?

It is owned by the County Highway Agency.