Maps for Prospecting
Critical Habitat Map
This is an online, interactive map. You can see the details for each designated critical habitat area.
This map provides the critical habitat designations for California and Nevada. All listed species as of April 2017 are included. The map was produced by gathering all the critical habitat shape files from the USFWS web site and plotting them using ARC GIS. Use this map for determining whether your claim, or your prospective claim is within a critical habitat designated area. There's a lot of it out there and the California Department of Fish and Wildlife has closed any area in critical habitat to dredging.
This online, interactive map is the only one like it. We are plotting all the active mining claims in the motherlode using a density map. At a quick glance you can see by each county where the most mining claims are. When you zoom in and click on a point you can scroll through all the active claims for that section and quarter section. This map provides all the active claims for Sierra, Butte, Plumas and Nevada counties.
Port Wine Ridge, Sierra County, 1924 Mines
This is a single page PDF map of the Port Wine Ridge Area
Prepared in 1924 this map shows the historical claims. Most of these claims were hydraulic or drift operations. This is a great map for research on the Port Wine Ridge.
Mine Resource Map
This is an online, interactive map. You can pan and zoom for your particular area and see the details for each mine site.
This map provides the location of known mines and mineral sites. It is a great research tool for locating old mines. The map provides information for the entire west and additionally maps the location of the old (tertiary) fault lines in California. The information includes details of the mine site, when known and is especially handy when you're looking for the location of old, historical mines. This map doesn't provide the location of existing, active claims.
Laporte CA Tertiary Valleys
This is a single page PDF which shows the tertiary areas near Laporte CA
If you're interested in the Laporte area this is a good resource map for locating the tertiary areas. It covers the area from Honey Lake in the east to Laporte in the west. From Quincy in the north to the Eureka Diggins in the south.