The mine operated until 1926. By the time the mine was discontinued, 340 acres had been mined. I have been at the site and have seen the remains of part of the slag pile with trees growing on the top. The air shaft has been filled in, but its location is apparent. It left a depression about 30 feet in diameter and 15 feet deep.
I am attaching a map of the area around the south part of Centerville to help you to visualize the large amount of coal mining activity and the large areas that were eventually mined out. The map also shows the routed of the Burlington and the Rock Island Railroads as well as the locations of the tipples and the underground area mined for each of the mines in the area.
Starting west of town we begin with the Relay mine of 300 acres, officially the Centerville Block No. 3. Following the Burlington Railroad to the east and south, there is the Anchor No. 1 mine with 70 acres and the Scandinavian mine with its 150 acre underground area going all the way from Cottage St. to Hwy. No. 2. Now skipping to the area just south of Centerville, on the Rock Island Railroad, we have the Center Coal Co. of last week’s article in Section 12, encompassing 330 acres. This mine is labeled National Coal Mining Co. No. 2 and will be discussed next week.
Going east we come to the Thirty Mine in Section 7, being discussed today. It was 340 acres and is labeled Carbon Block Co. No. 30 on the map. On the east side of Centerville the map shows two fairly large mines, the Dewey Coal Co. of 100 acres and the Raven Mine of 60 acres. My calculator shows the total to be 1635 acres or over 2.5 square miles in just eight miles!