Section 690-281 - Sealing openings(a) Permanently abandoned shafts.--Every shaft permanently abandoned shall be filled for its entire depth. The fill shall extend from the bottom of the coal seam to a height of 50 feet with incombustible material.(b) Out of service openings.--Every slope, drift or tunnel permanently taken out of service shall be filled for a distance of 25 feet with incombustible material.(c) Drillholes and boreholes.--All drillholes and boreholes permanently taken out of service after the effective date of this act shall be effectively plugged or sealed.(d) Openings available for future use.--Every shaft, slope, drift or tunnel, temporarily taken out of service, which may be used for future mining purposes shall be properly sealed or fenced.2008, July 7, P.L. 654, No. 55, §281, effective in 180 days [ 1/5/2009].