Ontario
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YearOperation NameNumberTypeOpeningDistrictCityCountyCompany NameRailroad Shipments (tons)Railroad to MineTruck Shipments (tons)Total Production (tons)Days WorkedEmployeesNotes
1872Ontario CollierySlope / Tunnels (2)EasternPleasant Valley (Avoca)LuzerneLuzerne Coal & Iron Co.0050,000 201 
1873Ontario CollierySlope 1EasternPleasant Valley (Avoca)LuzerneLuzerne Coal & Iron Co.0048,000 212 
1874Ontario CollierySlopeEasternPleasant Valley (Avoca)LuzerneLuzerne Coal & Iron Co.0011,200 248 
1875Ontario CollierySlopeEasternPleasant Valley (Avoca)LuzerneLuzerne Coal & Iron Co.0044,800 174 

Note 1: Added, does not appear in the mine inspection report.