12. Overview
• Permit Designs of the early 1990’s often leave
much to be desired operationally
• 15 years of landfill operation have taught us
much
• Many landfills can benefit from a Life of Site
Staging Plan review
100. Knowledge is Power; Time is Money
Knowledge = Power- eqn. 1
Time = Money - eqn. 2
High school physics has taught us that
Power = Work/Time.
From eqn. 2, Time = Money, so
Power = Work/Money
From eqn. 1, Knowledge = Power, so
Knowledge = Work/Money
Rearranging:
Money = Work/Knowledge
Notes de l'éditeur
Good afternoon. Well, let me start off by telling you a little more about me.
This is me.
I’m from here.
More specifically here.
I live here, with my wife of 12 years and 3 kids in a modest house on a hill.
In a town we really love.
I was educated here. And here.
I work here.
Well, really I work here.
Where I design these ... landfills that is.
- click - Planning CAN and WILL save you money
Many attempts failed
Likely because of public opposition or political road blocks
Your site was a success?
Environmental protection is still paramount
Little thought to sequencing
Operations?
Designers often “County Engineer”
We have to live now, with the permits and plans that were often developed without significant or adequate experience based knowledge.
Know what’s needed?
Know what you have?
Know how long it will last?
Construct what’s needed.
Height = density
Maximize height = maximize density
Don’t trap storm water - block or dig a hole (or know how to manage)
Gravity flow where possible
Anticipate construction materials needs/excesses.
Total site soil balance is not staged soil balance
Access to cell
Extra haul distance? Temporary roads?
Construction traffic on permanent roads?
Solidification basins
Leachate pump stations
Cell Access roads
Perimeter roads
Haul roads
Close phases as possible - larger unclosed area = higher financial assurance
Sump Construction
Phased capping
Active face control
Storm water management
Daily cover management
Construct sumps large enough for expected flow
Depth matters for pump systems
Temporary sumps are problematic
Size tanks according to staged leachate flows
Close areas as soon as possible to minimize infiltration
Place adequate intermediate cover
Small active face minimizes storm water infiltration
Direct water away - berm
Segregate storm water in newly constructed cell
Divert storm water away from open cells
Don’t puddle water on the cell
Utilize alternate daily covers
Strip soils (causes breakouts, gas flow problems)
When to build
How much area (volume) to build
Bundle construction packages
Upcoming solid waste permit issues
OPTION 1
Each successive cell seems to achieve maximum volume on long edge
Geometry limits height
I have seen phasing very similar to this
1 yr first cell
6.5 yrs cell 3
15 yrs cell 6
55 total years life
OPTION 2
Some cell sequencing not the most efficient NEXT cell
But, we’re optimizing height
Yr 6 - Option 2 provides 18 yrs life vs. 15 yrs Option 1
Throughout Cells 6 through 12, Option 2 provides more life per cell
Note that both options yield the same life
This sequence maximizes volume by maximizing height
The Egyptian Triangle - vertical cross section of the pyramids
Pyramids utilize the Golden Ratio - that is the sides are of the ratio 1:sqrt(psi) where psi is teh golden mean or 1.61803
Slightly more volume in Cell 4, makes up for loss in Cell 3
Significant volume gain in Cells 6 and 8
We can see for a given cell, beyond cell 5, Option 2 is constructed at a later date, thus saving expense costs