Current through Register Vol. 54, No. 44, November 2, 2024
Section 90.125 - Coal refuse disposal: construction requirements(a) The coal refuse disposal area shall be constructed in compliance with this section and §§ 90.122 and 90.124 (relating to coal refuse disposal; and coal refuse disposal: site inspection), except to the extent the requirements of those sections are specifically varied in this section.(b) The coal refuse shall be:(1) Spread in horizontal layers no more than 24 inches in thickness.(2) Compacted to attain a minimum of 90% of the maximum dry density as determined by the Modified Proctor Test or 95% of the maximum dry density as determined by the Standard Proctor Test.(c) Concurrently with construction of the site as each portion of the site is developed and reaches final configuration and elevation, that portion of the site shall be covered with a final layer of nontoxic, noncombustible material and soil suitable for revegetation within 60 days and revegetated under §§ 90.151-90.157, 90.159 and 90.160. The minimum combined thickness of the nontoxic, noncombustible material and soil shall be 4 feet except that this requirement may be waived for coal refuse disposal areas permitted prior to July 27, 1991 if the requirements of §§ 90.150-90.157, 90.159-90.165 can be attained; or when the permittee has demonstrated that a lesser combined thickness is as effective as 4 feet of combined thickness in meeting the performance standards of this chapter.(d) The Department may approve other compaction requirements if the requirements of § 90.122 are met.The provisions of this §90.125 adopted December 19, 1980, 10 Pa.B. 4789, effective 7/31/1982, 12 Pa.B. 2382; amended July 30, 1982, 12 Pa.B. 2473, effective 7/31/1982, 12 Pa.B. 2382; amended February 17, 1984, 14 Pa.B. 524, effective 8/4/1984, 14 Pa.B. 2860; amended June 15, 1990, 20 Pa.B. 3383, effective 7/27/1991, 21 Pa.B. 3316. This section cited in 25 Pa. Code § 90.3 (relating to general requirements: permit); 25 Pa. Code § 90.39 (relating to ponds, impoundments, banks, dams, embankments, piles and fills); 25 Pa. Code § 90.91 (relating to requirements); 25 Pa. Code § 90.128 (relating to coal refuse disposal: active surface mines); 25 Pa. Code § 90.129 (relating to coal refuse disposal: abandoned unreclaimed surface mines); and 25 Pa. Code § 90.130 (relating to coal refuse dams).