Minnesota Department of Transportation

511 Travel Info

Grading & Base

Quality Control/Quality Assurance (QC/QA)


Modified Penetration Index Method

The Modified Penetration Index Method can now be used for compaction acceptance of all granular materials. The Project Engineer must write a Supplemental Agreement to change the compaction method from Specified Density or the former Penetration Index Method to the Modified procedure.

Use Microsoft Excel version 2000 or newer for forms in Excel(.xls)
Required settings for your Excel software (7/06)