I-5 over Nisqually River

Fair Condition89 years old62,815 vehicles/day

Location

StateWashington
CountyThurston
Location2.9 N Jct SR 510
CarriesI-5
CrossesNisqually River
Coordinates47.07129, -122.70486

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure5 (Fair)
Substructure7 (Good)
Channel/Waterway4 (Poor)
Scour Critical5 — Stable for scour

Physical Characteristics

MaterialSteel
DesignTruss - Thru
Total Length446.9 ft (136.2 m)
Max Span323.2 ft (98.5 m)
Deck Width45.9 ft (14 m)
Deck Area1906.8 sq m
Main Spans1
Year Built1937 (reconstructed 1982)

Traffic

Avg Daily Traffic62,815 (2023)
Truck Traffic12%
Lanes On Bridge3

Inspection & Ownership

Last Inspection423
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0002069A0000000

Nearby Bridges

I-5 over Nisqually River 0.0 mi Fair I-5 over Nisqually Overflow-south 0.3 mi Fair I-5 over Nisqually Overflow 0.3 mi Fair I-5 over Nisqually Overflow 0.5 mi Fair Nisqually RD SW over Bnsf Railroad Overpass 0.5 mi Good Nisqually Cutoff over Overflow Channel 0.5 mi Fair I-5 over Nisqually Overflow 0.5 mi Fair I-5 S-e Ramp over I-5 Mainline 0.5 mi Fair I-5 over Mcallister CR 0.7 mi Good I-5 over Mcallister Creek 0.8 mi Fair