The intersection 1 block inby spad #1677 fell 18' long x 40' wide x 12' high due to wet roof bad geology & subsidence. The area was bolted with 68x72"" rebar with 6x6 plates + 2x8x14"" boards. The area had been spot bolted with 12' cable bolts. The fall will not be cleaned up. All sides cribbed & permanently dangered off.