2014-04-14_REPORT - M1980244 (5)

Home Browse Search

A Cat D10 dozer and a Cat 330 hammer cut the PSSA pond floor to grade. A John Deere 870 excavator loaded 740 haul trucks with structural fill material from the PSSA pond floor. The material was transported to PSSA embankment fill. The structural fill was placed and compacted per method specification. A John Deere 850 excavator also removed material from the Y2:1 slope. This material was transported to the rip rap plant for processing using Cat 740 haul trucks and to the PSSA embankment area for use as structural fill. Structural fill was placed with Cat dozers and compacted with a Cat CS56 smooth drum roller per project specification. Cat dozers cut the slope to rough grade near stations A16+00 to A20+00, C2+00 to C4+00, and B12+00 to B15+00. A Cat GPS D7 dozer rough graded the southwest slopes of the PSSA below station A0+00 to A4 +00 and a Cat CS56 smooth drum roller compacted the finished subgrade slopes afterwards. A Cat GPS D7 and a Cat D8 dozer rough graded the southern half of the PSSA floor. A Cat 330 excavator, a Cat 928 loader, a Cat CS56 smooth drum compactor, and Cat D6 dozer were used build the slopes behind the MSE wall at the water storage pond. Note: An AMEC field professional monitored structural fill material temperatures placed within fill areas. Average structural fill temperatures were above 32 °F and snow removal occurred prior to fill placement. Clay (SLF) Processing: Cameron Site: No clay mining or processing occurred at the Cameron Site. Approximately 244,860 tons of clay I soil liner fill (SLF) material have been produced at the Cameron site. SLF produced from the operation remains stockpiled at Cameron Site for future use. Squaw Gulch Clay Borrow Site: Clay mining and processing took place at the Squaw Gulch Clay Borrow Site. Approximately, 101,700 tons of soil liner fill material has been produced at the Squaw Gulch Clay Borrow Site to date. Underdrain System: Primary Underdrain: No work occurred on the primary underdrain. Secondary Underdrain: Approximately 150 lineal feet of secondary underdrain was installed adjacent to Dump 4 near station J2+00. Tree /Slash Grubbing and Clearing, Chipping: No clearing or grubbing occurred. B) Underground Workings UG #U6315 Unknown Adit: Confirmatory drilling was used to identify the adit location. Then a Hitachi 200 excavator and a Cat D10 were used to remove approximately 100 lineal feet of the adit's crown pillar that crossed near the ADR haul road near station 8 +00. The adit was excavated to competent rock and backfilled with structural fill using the excavator. Additional remediation work is required. UG #U6318 Unknown Adit: Three additional holes were drilled to 50 feet using a Tamrock 700 drill (9 total borings). No voids were identified. Additional remediation work is required. UG#U6428 Unknown adit: A Cat 330 excavator removed shot rock from the working and began backfilling it with structural fill. The structural Page 2 of 7 NR—E2 WE 05 April 2014. doe