Did you know there was coal mining in California? I didn’t learn that until recently. This, despite the fact that the Mount Diablo Coalfield, the largest in California, was in Contra Costa, the very county where I was born. From 1850 to 1906, mines in the Mount Diablo Coalfield, many under the operation of the Black Diamond Coal Mining Company, produced 4 million tons of (low grade) coal, the primary source of coal and energy in California over that period. The region was home to five mining towns, the largest and oldest called Nortonville.
In 1885, the Black Diamond company shut down its mines in the region and moved its miners to Black Diamond, Washington, where the mines produced better coal. They dismantled the railways and the towns completely, leaving nothing but some brick foundations in Nortonville, some great piles of dirt where the openings of the mines had been, and the cemetery, now known as Rose Hill Cemetery, which overlooked the town of Somersville.
Here’s Somersville in 1878. You can see the cemetery up on the hill to the right, and the great mounds that mark the openings of the mines.
Here’s that region today.
You can’t see it in this photo, but the mounds over the mine openings remain. Nothing grows on them. The region is now part of the Black Diamond Mines Regional Preserve, just outside the city of Antioch.
We visited the park on a cool, overcast March Sunday. Early spring is the best time to visit that area; there are hills that block the ocean breezes from that part of the county, and in the summer it can be twenty degrees warmer — or more — than it is in San Francisco, only an hour away. It can also be very dry and brown. I was a bit worried, since we haven’t had any rain, but the hills were green and blooming with wildflowers.
By the time we visited the cemetery, in the early afternoon, the clouds were burning off and the sky was turning blue. Continue reading