Historical Farmline Maps
These historical maps generally include well information, municipal and property boundaries, and local features such as roads, streams, and building locations for a given area and time. As an example, Figure 1 tells us that the McClelland Well (identified as Well No. 1179 by the United States Geological Survey) was drilled as a deep gas well just north of the stream on the Olive Vail property. This well encountered the Pittsburgh Coal seam at a depth of 425 feet.
Some of these maps are associated with Special Bulletins and Survey Reports, while others have been submitted to the Survey by oil and gas companies over the years. Figure 2 summarizes those areas of Western Pennsylvania for which farmline maps are available for review in our Pittsburgh Regional Office. These maps generally cover 15-minute quadrangle study areas (shown in pale pink below). Please note that not all of these farmline maps post well locations on them.