COST-ESTIMATING SOFTWARE FOR RECLAMATION BONDS
Photograph by Fred Photograph by Fred Voetsch
Sherpa for Reclamation Bonds is an engineering-based,
menu-driven program that uses project and site parameters supplied by the user
to estimate the equipment, labor, supply, and administrative costs associated
with mine site reclamation. The program is designed to estimate the costs of a multitude of common
Spreading & Contouring
Culverts & Pipes
Solid & Liquid Waste
Sample Collection & Analysis
Ponds & Impoundments
PLANTING & SEEDING
Sherpa also breaks down each of the above
categories into a variety of
subcategories where appropriate. For instance, under the Adit Closure heading, costs can
be estimated for any one of the following closure methods:
Concrete Block Wall
And under the Solid & Liquid Waste Disposal
heading, costs can be estimated for the disposal of any of the following:
SOLID & LIQUID WASTE DISPOSAL
A variety of machines are available in the program, any of which can be assigned as necessary. The program database contains engineering and cost information for various sizes of the following:
AVAILABLE PROJECT MACHINERY Backhoes Percussion Drills Bulldozers Air Compressors Crawler Loaders Pick-up Trucks Draglines Graders Hydraulic Shovels Auger Drills Rear-dump Trucks Mulchers Scrapers Tractors Wheel Loaders Concrete Trucks Hydraulic Breakers Concrete Pumps Flat-bed Trucks Cranes Tanker Trucks Trash Pumps
The program also automatically estimates project mobilization and demobilization costs.
In order to comply with Federal standards, Sherpa uses
Davis-Bacon wages for its labor cost estimates. Wages for a number of regions
within the United States are included in the program database, and each can be
adjusted for local variances. In addition to the costs of most required
reclamation tasks, Sherpa also provides estimates for the following project
PROJECT OVERHEAD CHARGES
Current supply and equipment prices along with the
Davis-Bacon wages are contained in a separate database, which is
automatically queried by the program. Most cost values found in the database
are supplied by Western Mine Engineering, Inc.’s Mining Cost Service.
All costs, prices, wages, and administrative fees can be easily altered by the
user within the operating parameters of the program. A user’s manual fully
explains program operations, utility functions, and most of the algorithms
used in the cost-estimating calculations. The manual also contains a detailed
tutorial example that enables the evaluator to quickly learn how to use the
primary features of the program. Help screens are available for all but the
most apparent entries. These screens explain the type of information requested
by the program and the way in which Sherpa determines its suggested values.
Help screens also provide the user with alternative data that can be used to
modify Sherpa’s suggested values. Complete project output reports may be sent
directly to a printer. In addition, program output may be saved to text files
that can then be imported into any major word processing program to
further enhance printed output.
HERE'S How Sherpa for Reclamation Bonds works:
First, enter basic information regarding the project
such as location, distances to support and disposal facilities, and project
duration. Then move on to a series of screens where you can enter engineering
parameters associated with specific site tasks. For instance, if the
reclamation plan requires the removal of a concrete foundation, the program
provides a screen upon which you enter the foundation thickness, height,
perimeter length, and method of reinforcement, along with the distance to the
disposal site. The program immediately estimates and displays equipment and
labor requirements (in terms of hours), along with the equipment unit
operating costs and the hourly wage estimates. You can then view all the
information displayed by Sherpa and adjust it as necessary.
The program provides ten separate entry screens for each reclamation task.
For instance, if you had eight adits scheduled for closure at one
site, then you would enter the engineering parameters for each on a separate
After you have filled out a screen for each site task, you then move on to a series of screens where you can review preliminary results. If these seem inappropriate, you can return to the input screens and make adjustments as necessary. The first result screen displays the equipment fleet required to accomplish your reclamation project. Sherpa’s cost engineering processes are designed to minimize the number of machines mobilized to the site. For example, if several separate tasks would each typically require a different sized bulldozer, the program attempts to apply one or two sizes to all the tasks, and if this is technically feasible, it reduces the fleet accordingly. On the next result screen, Sherpa displays the crew required for your project.
The program then displays a summary of the costs for each site task. All subsequent calculations are based upon this summary value. These calculations include estimates of project administrative costs such as contractor’s profit, liability insurance, bond premium, engineering and design fees, indirect costs, and project management fees. A contingency is also provided to cover the costs associated with unanticipated or unforeseen project requirements. As with all costs displayed in the program, you can adjust any of these fees as necessary.
Finally, Sherpa totals all the project task costs and administrative fees to provide an estimate of the required reclamation bond value. You can then send the results to either a printer or a text file and save all the entered data to a project file.
DEVELOPED BY: AVENTURINE ENGINEERING, INC.
IN CONJUNCTION WITH: BUREAU OF LAND MANAGEMENT, OREGON, AND WESTERN MINE ENGINEERING, INC.
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