Sanderson, H. S.2017-07-182022-02-032017-07-182022-02-031917https://hdl.handle.net/11124/171077Scale approximately 1:480 or 1 inch = 40 feet.Water color on blueprint base.Edition: Bro't to date December 1917."Platted from co-ordinates, latitudes and departures -see record-""Elevations computed with relation to Primos 0 388 = elevation 8365.9."Covers parts of Boulder County, Colorado. Covers parts of the Nederland quadrangle, Colorado. Commodities mined: tungsten.57 x 87 cmmine mapsengMining claims -- Colorado -- Boulder County -- MapsMines and mineral resources -- Colorado -- Boulder County -- MapsStillImage