I-5 over Nisqually Overflow

Fair Condition43 years old62,815 vehicles/day

Location

StateWashington
CountyPierce
Location0.6 N Thurston Co
CarriesI-5
CrossesNisqually Overflow
Coordinates47.07511, -122.69497

Condition Ratings

Overall ConditionFair
Deck6 (Satisfactory)
Superstructure7 (Good)
Substructure7 (Good)
Channel/Waterway8 (Very Good)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignStringer/Multi-beam
Total Length399.9 ft (121.9 m)
Max Span100.1 ft (30.5 m)
Deck Width55.1 ft (16.8 m)
Deck Area2047.9 sq m
Main Spans4
Year Built1983

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 Number0012137B0000000

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 0.9 mi Fair I-5 over Nisqually Overflow 0.9 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 1.1 mi Fair I-5 over Mcallister CR 1.2 mi Good