http://www.gvrhc.org/Library/SlavinGulch.pdf has some great information on Slavin Gulch and the Abril Mine including a picture identifying this as the control building for the mine - beautiful spot.
Tags: abril mine,arizona,cochise county,cochise stronghold,coronado national forest,dos hermanos mine,douglas ranger district,mine,slavin gulch,slavin gulch trail,two brothers mine

http://www.gvrhc.org/Library/SlavinGulch.pdf indicates that the Abril mine was worked from 1914 to 1952.
Tags: abril mine,arizona,cochise county,cochise stronghold,coronado national forest,debris,dos hermanos mine,douglas ranger district,mine,ore chute,slavin gulch,slavin gulch trail,two brothers mine,wood

Note the old ore chute from the Abril mine, here and from a distance on the hike it looks a bit like a water stain (which would have been welcome on this rather warm day!).
Tags: abril mine,arizona,cochise county,cochise stronghold,coronado national forest,dos hermanos mine,douglas ranger district,mine,slavin gulch,slavin gulch trail,two brothers mine