I-5 over Nisqually Overflow

Fair Condition58 years old62,815 vehicles/day

Location

StateWashington
CountyPierce
Location0.6 N Thurston Co
CarriesI-5
CrossesNisqually Overflow
Coordinates47.07564, -122.69656

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure6 (Satisfactory)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length399.9 ft (121.9 m)
Max Span100.1 ft (30.5 m)
Deck Width51.5 ft (15.7 m)
Deck Area1913.8 sq m
Main Spans4
Year Built1968

Traffic

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

Inspection & Ownership

Last Inspection924
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number0008134A0000000

Nearby Bridges

I-5 over Nisqually Overflow 0.1 mi Fair Nisqually RD SW over Bnsf Railroad Overpass 0.2 mi Good I-5 over Nisqually River 0.5 mi Fair I-5 over Nisqually River 0.5 mi Fair I-5 over Nisqually Overflow-south 0.8 mi Fair I-5 over Nisqually Overflow 0.8 mi Fair Old Pacific HWY over Nisqually River 1.0 mi Good Nisqually Cutoff over Overflow Channel 1.0 mi Fair I-5 S-e Ramp over I-5 Mainline 1.0 mi Fair I-5 over Mcallister CR 1.2 mi Good