US Bridges

Roberts RD over Anderson CR

Good

Whatcom County, Washington · 0.2 N of Goshen Road · Structure no. 089078000000000

Built
2019
6 years old
Condition
Good
inspected October 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
83 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

Roberts RD over Anderson CR is a concrete box beam or girders - multiple carrying Roberts RD over Anderson CR in Whatcom County, Washington. It was built in 2019, so it is 6 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 150 vehicles a day, roughly 1% of them trucks, projected to reach 200 by 2041. The structure is 83 ft (25.3 m) long and 33 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesRoberts RD
CrossesAnderson CR
Location0.2 N of Goshen Road
RouteCounty Highway 56210
Coordinates48.85751, -122.33745
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating56.4 US tons

Structure

MaterialConcrete
DeckOther
Main spans1
Design loadHL 93
Structure length83 ft (25.3 m)
Longest span77 ft (23.5 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic200 by 2041
Trucks1%
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$3.4 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Roberts RD over Anderson CR built?

It was built in 2019, making it 6 years old in 2025.

What condition is Roberts RD over Anderson CR 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 October 2023.

How much traffic does Roberts RD over Anderson CR carry?

About 150 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Roberts RD over Anderson CR?

The structure is 83 ft (25.3 m) long with a longest span of 77 ft (23.5 m) and a deck 33 ft wide.

Who owns Roberts RD over Anderson CR?

It is owned by the County Highway Agency.