and Septembers preceding the recession of 1949, 1954, and 1958, and this district knows this problem well, because this district has lost 60,000 people in the last 10 years." By 1968, with hopes of bringing a new influx of coal mining into the city, Sahara Coal Company ordered the Bucyrus-Erie "GEM of Egypt" strip mine shovel, one of the largest in the world at 8 stories high and weighing 1,000 tons. It took three men to operate it, and its bucket capacity was 30 cubic yards. Even with such great efforts coal mining continued to dwindle within the community. The train depot was razed in 1972 and all coal freight was ordered out of the Harrisburg Hump Yard by 1973. During the 1970s and 1980s, many of the city-square storefronts and mini-plazas became vacant and were slowly abandoned as large chain stores and strip malls on Commercial Street became the dominant venues for shopping and entertainment, hoping to bring an influx of travelers from the main highway. The Clean Air Act Amendments of 1990 legislation forced many utility companies in the United States to switch to low-sulfur coal. In response Harrisburg's already waning economy took a severe downturn. The freight yard had closed in 1982; Sahara Coal Company shut down operations in 1993, and 865 jobs were lost in the county that year. This ended the reign of big coal in Harrisburg, a way of life for residents for over 100 years. The Cairo and Vincennes Railroad/Cleveland, Cincinnati, Chicago and St. Louis Railway system tracks were taken up in the late 1980s and replaced by the Tunnel Hill State Trail in 1996. Post-coal economy Soon Pioneer history was showcased at the Saline County Area Historical Museum on the city's southern edge. The site includes the three-story high Old Pauper Home, which was once part of the county's poor farm, built in 1877. The site also features a variety of cabins, a one-room school house, a small church and other historic buildings that have been acquired, moved to the site and restored. The Harrisburg-Raleigh Airport is located approximately four miles north of Harrisburg on Highway 34. The Harrisburg-Raleigh Airport Authority operates the airport. The Airport has two runways–32/14 and 6/24. Runway 24 includes a extension, bringing the runway to with a GPS-RNAV approach. Two industrial zones were set up within the township in 1974 by the Saline County Industrial Development Co.,