5103_JohnstonCoLF_capacity_20200108

Johnston County Landfill - Comparing changes in capacity and acreages from the last approved application and permit (2017) to the current
application for Phase 6 PTC and vertical expansion of Phase 4A (2019)
Calculation by D. Wilson, January 2020
MSW Phases only
Capacity from 2017 permit
Applic for vertical expansion
of 4A and reconfig of Phases 6-
10
2,396,265
Phase acre size
from 2017
permit
Phase acre
size from
2019 applic
Phase 6
1,402,016
21.1
19.7
Phase 7
1,758,991
2,841,196
19.8
23.4
Phase 8
1,844,867
3,122,359
25.2
19.8
Phase 9
6,684,914
1,558,088
22.5
23.1
Phase 10
3,137,920
4,360,867
17.5
18
Capacity of Phases 6-10
14,828,708
14,278,775
Acre size Phases 6-10
106.1
104
4A cells 1 and 2 (2017)
1,111,382
4A cell 3 (2017)
2,205,678
4A used (2019)
2,771,236
4A remaining (2019)
545,824
4A expansion (2019)
126,693
Notes on changes
Capacity of 6-10 has decreased by 549,933 cy
Acreage of Phases 6-10 has decreased by 2.1 acres.
Capacity of Phase 4A 3,317,060 3,443,753 Capacity of 4A has increased by 126,693 cy (the expansion)
Acre size Phase 4A 29.4 29.4
Phase 5 1,087,199 1,087,199 19.2 19.2
Overall change in capacity is a net decrease of 423,240 cy.
Total Phases 6-10, 4A, and 5 19,232,967 18,809,727 154.7 152.6 Final height of Phase 4A is changing from 332 to 345 msl, an
increase of 13 feet.
IThe official approved capacity of the lined landfill units, including both MSW and C&D units, is 19,900,000 cubic yards. This consists of MSW Phases 4A and 5 through 10, and C&D Areas 1
and 2. An increase of 10% or more of this volume would be a substantial amendment.