DPI, Dirt, and 811 are all related to damage prevention and excavation safety: 

• DPI

  The Damage Prevention Institute (DPI) is an initiative of the Common Ground Alliance (CGA) that aims to improve shared accountability for damage prevention. 

• DIRT

  The Damage Information Reporting Tool (DIRT) is a tool from the CGA that collects data to evaluate the safety performance of those involved in damage prevention. 

• 811

  811 is a national toll-free number that people can call before digging to request that buried utilities are marked. 

Here's some more information about each of these: 

• DIRT

  DIRT's Query Wizard allows users to sort data, create graphs and tables, and generate customized reports. The Data Grants feature in DIRT allows organizations to share data with each other. 

• 811

  Calling 811 before digging is the primary way to prevent excavation damage and injuries. Research shows that people who call 811 have a 99% chance of avoiding an incident. 

• DPI

  The CGA was founded on the idea that reducing damage to underground utilities is a shared responsibility. The CGA has been working to reduce utility damage for over 20 years.