1. Landfill Closure
• Mass excavation of
120,000 yards of fill dirt,
placed for 24” landfill
cover
• Additional 6” of topsoil
placed for a total of 30”
cover
• Fine grading of cover dirt
and topsoil
• Installation of storm
drainage
• 1,400 linear feet of 24”
HDPE storm drain pipe
• 13 - 24” storm drains
• 450 feet of 36” HDPE
storm drain pipe
• 6 - 36” storm drains
• 1000 tons of rip rap placed
for erosion control
• Seeding of approximately
18 acres of the landfill
cover
• Rough grading and
seeding of 12 acre borrow
pit
2. Landfill Cell
Construction
• Constructed:
• 10 acre refuse cell
• Retention pond
• 2 - drainage ditches
• 115,000 cubic yards of mass
excavation and top soil
removal
• 25,000 cubic yards of sand
placement / liner cover
• Excavated 25,568 cubic
yards to construct a
retention pond and
associated ditches
• Excavated 30,644 cubic
yards to construct drainage
ditch around perimeter of
property
• Relied on off-road trucks to
complete project instead of
scrapers due to excessive
rains
• Wet topsoil was pushed off
the 10 acres and stockpiled
offsite
3. Landfill Clay Cap
• Mass excavation of
46,600 cubic yards for cell
construction
• Installed 250 linear feet of
collection pipe
• Installed 175,500 square
feet of geosynthetic clay
liner
• Installation of berm and
sump
• Redistributed 19,600
square yards of topsoil
• Constructed haul road,
ditches and installed
culverts
• Seeded 4 acres
4. Landfill Clay Liner
• Cleared trees and vegetation
from 40 acres
• Mass excavated and
stockpiled 411,600 cubic
yards of soil
• Constructed clay liner with in
place excavated soils from
within liner area
• 15,000 cubic yards of
earthwork cutting
and filling
• Recompacted
156,000 cubic yards
of soil liner
• Proofrolled 32 acres
of liner subgrade
• Replaced 6 inches of
topsoil over 14 acres
• Performed dewatering,
dust and
erosion
control, and
haul road
maintenance
throughout
project
5. Ash Pond
Construction
• Dewater the existing 120 acre
pond and stockpile 220,000 CY of
bottom ash
• Construct and maintain 3 miles
of haul road for 40 ton articulated
trucks
• Blast, haul, place, compact and
grade 605,000 CY of Type II
24a stone for construction of the
starter dike and working platforms
• Install drainage for the working
platform areas
• 1050’ of 6” HDPE, 3220’ of 8”
HDPE, 4550’ of 12” HDPE
• 525’ of 32” concrete encased HDPE
• Two 12’ diameter, 32’ deep wet
wells and associated mechanical
equipment
• Drainage structures for system
connection including inlets,
manholes, drop boxes, and end
sections
• Demolish existing riser structure
and install new riser structure
• Install new 102’ span pedestrian
bridge and associated pier
structure
• Install 190,000 CY of compacted
clay for flexible membrane liner
placement
• Install 3,439,000 SF each of
flexible membrane liner and type I
& II filter fabric
• Place 21,500 CY of #2 stone and
23,000 CY of #57 stone as ballast
on the liner slopes
• Place 182,000 cubic yards of
bottom ash as ballast on the pond
bottom