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Aggregate Sources Interactive Map
Gravel Pit and Rock Quarry Aggregate Source Information
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Launch Interactive Aggregate Source Information System Map


The Office of Materials developed the Aggregate Source Information System (ASIS) in 1985. It is a database used to store and retrieve information on aggregate sources (gravel pits and rock quarries). Each pit or quarry is assigned a 5-digit source number. The Geology Unit manages this database.


The ASIS Interactive Map is a geographical representation of the gravel pit and rock quarry data that is in ASIS.


If you have problems viewing data please see Frequently Asked Questions. Instructions on using the map interface are available by clicking on the Help button on the top menu bar of the interactive map. Below is additional information about the Aggregate Sources layer.