Step 1: Extracted Soil Data

July 10, 2026

Soil Boring

2

Takeoff

3

Design

Project Information
Project Name Stone Column Ground Improvement – Roundhouse Addition
Boring Number 1
Location 1602 South 2nd Avenue, Marshalltown, IA
Groundwater 10.0 ft
AI Model gpt-4o
Extracted Dec 15, 2025 17:37
Soil Layers
5 layers
Layer Depth (ft) Soil Type SPT N-Value Description
1 0 - 5.0 ft Lean Clay 5 (Dense) FILL: LEAN CLAY, Trace Sand and Gravel, Brown and Dark …
2 5.0 - 10.0 ft Lean Clay 10 (Dense) LEAN CLAY, Trace Sand, Brown, Medium Stiff
3 10.0 - 15.0 ft Fine to Medium Sand 14 (Dense) FINE TO MEDIUM SAND, Trace Clay, Brown, Medium Dense
4 15.0 - 20.0 ft Sandy Lean Clay 19 (Dense) SANDY LEAN CLAY, Trace Gravel, Brown, Stiff, Occasional Sand Seams …
5 20.0 - 25.0 ft Sandy Lean Clay 18 (Dense) SANDY LEAN CLAY, Trace Gravel, Dark Gray, Very Stiff to …
Soil Profile
0-5.0 ft Lean Clay N=5
5.0-10.0 ft Lean Clay N=10
10.0-15.0 ft Fine to Medium Sand N=14
15.0-20.0 ft Sandy Lean Clay N=19
20.0-25.0 ft Sandy Lean Clay N=18