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IL Engineering Field Handbook Supplements 1-34 - 3-108

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The following supplements require Adobe Acrobat Reader to view:

Chapter 1 - Engineering Surveys
Illinois NRCS Engineering Supplement File
Name
File
Type
Precast Concrete Monuments  1-73.1-2 PDF

Procedure For Offsetting Curves  1-116.1-3 PDF

 

Chapter 2 - Estimating Runoff
Illinois NRCS Engineering Supplement File
Name
File
Type
ES-1027 Curves  2-10.9 to 2-10.34 PDF

Rainfall & Other Maps To Be Used In Design  2-36.1 PDF
100 Yr. 6 Hr. Rainfall In Inches (Illinois State Map)  2-36.3 PDF
2-yr 24-hr rainfall in inches (Illinois State Map)  2-36.8 PDF
5-yr 24-hr rainfall in inches (Illinois State Map)  2-36.9 PDF
10-yr 24-hr rainfall in inches (Illinois State Map)  2-36.10 PDF
25-yr 24-hr rainfall in inches (Illinois State Map)  2-36.11 PDF
50-yr 24-hr rainfall in inches (Illinois State Map)  2-36.12 PDF
100-yr 24-hr rainfall in inches (Illinois State Map)  2-36.13 PDF
Average annual frost penetration in inches (Illinois State Map)  2-36.18 PDF
24 Hour Rainfall (Inches) for Illinois Counties  2-36.19 PDF
24 Hour Rainfall (Inches) for Illinois Counties  2-36.20 PDF

Soils Series In Illinois, Number And Name  2-42.1 to 2-42.8 PDF

Illinois Hydrologic Soil Groups in Illinois  2-42.9 to 2-42.16 PDF

 

Chapter 3 - Hydraulics
Illinois NRCS Engineering Supplement File
Name
File
Type
Headwater Depth for Various Culverts  3-94.1 to 3-94.6 PDF

Chart for Relief Wells  3-108 PDF

 

Last Modified November 28, 2011
By Manny Quinones, USDA-NRCS
Email: manuel.quinones@il.usda.gov