Information on these gold mines is sparse. Phil Sullivan, an early pioneer of Twentynine Palms, located the Contact claims by at least 1921. He filed a homestead there in 1897. (Also see the Silver Bell Mine.)
Along with Bill McHaney (see the Desert Queen Mine), Phil reportedly built an arrastra near Twentynine Palms around 1910 to mill the ore. In 1953, the mine was owned by E. M. Reimiller of Twentynine Palms. The mine workings consist of a 50-foot open cut and a 150-foot shaft with a drift on the 50-foot level. It was worked in 1933, 1935, and 1940 for gold.
The mine to the north, which I’m calling the "North" Mine, was even more challenging to find any information on. I couldn’t find the date of its discovery, what time period it was worked, or even its name! Judging by the debris around the site, I would guess it was worked as early as the 1890s and as late as the 1930s.