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Mineral Information Layer for Oregon-Release 2 (MILO-Release 2) is a geospatial database that stores and manages information regarding Oregon's mineral occurrences, prospects, and mines. A subset of the data is shown on this data viewer site; see the bottom of this page to order the full data set.

To view the map, your browser must be JavaScript enabled and must allow cookies. Internet Explorer users: If you get a message asking if you want to stop loading slow scripts, click "No" or view in another browser (e.g., Firefox, Safari, Chrome).

Mining sites are included for informational purposes only and should not be used to infer acceptable or permitted land use actions. Interested parties should contact their local land use authority to verify zoning and applicable land use ordinances. Respect the rights of private property owners. Understand that recreation in or around inactive mine sites is extremely dangerous and can result in serious injury or death. Stay out and stay alive!

MILO Data Viewer - Due to the large number of data points, please select a county area from the dropdown menu first. After selecting an area, you can view data as a MAP, a LIST, or a TABLE. Click on the map image above to view a large PDF of the map.

Filter by:
aggregate coal industrial mineral metal
(commodity abbrev.: )

Mining District:
Desc. of workings:
7.5' topo map: 

Disclaimer: No warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. We also urge you to pay careful attention to the contents of the metadata file associated with these data and to the compilation process and limitations described therein. The Oregon Department of Geology and Mineral Industries shall not be held liable for improper or incorrect use of the data described and/or contained herein. Data are not intended for site-specific investigations.

This site contains a subset of the data in MILO-2. Preview/download full MILO-2 data set.

Phone: 971-673-1555