ASSIGNMENT
Develop a construction estimate based on the following Items:
Tunneling
A TBM costs $15,000,000 to purchase and mobilize on site
Each Tunneling Contract will require its own TBM
A tunneling crew costs $965.50 per hour
As the result of the varying geotechnical conditions the production rates for the TBMs for each contract will be as follows:
Contract 1a – 30 feet per 8-hour shift
Contract 1b – 12 feet per 8-hour shift
Contract 1c – 20 feet per 8-hour shift
Contract 1d – 30 feet per 8-hour shift
Tunneling will be performed on a 24-hour basis. This is the only trade that will be performed on a 24-hour basis.
There is a $300 an hour shift differential for working the third shift.
The operating cost of a TBM is $825 per hour
The cost of soil disposal is $5.25 per cubic yard
Tunnel Liner
A tunnel liner costs $1,500 per linear feet.
The cost of installation is included in the tunneling
Tunnel Ventilation
Material $515 per linear feet
Labor $600 per hour
Installation of Railroad Tracks
Material $154.5 per linear feet
Labor $450 per linear feet
Tunnel Electrical
Material $550 per linear feet
Labor $710 per linear feet
Station Construction
Each station is 40,000 square feet
Cost of construction is $472.00 per square feet
The above listed costs do not include profit and overhead which will be calculated at 15% overhead and 10% profit.
Financial Analysis
Six (6) months following the NTPDE, you are informed that a TBM that is being used on another project will become available in five (5) months including delivery and installation. This TBM is $3,500,000 less expensive than a brand-new model. However, this used TBM will generate 7-percent more spoils (excavated material that must be disposed) than the newer model. It costs $7.25 per cubic yard to dispose and transport spoils.
Additionally, this machine will have a higher operating cost ($10/hr).
You must develop a financial analysis to determine if utilizing this additional TBM will be cost effective from a scheduling stand point and if this savings may or not be offset by the additional costs and purchase price savings.
You should also determine what adjustment in the tasks could be made to this TBM on site and working and what Tunnel Contract it should be used on to help the schedule the most.
Scheduling Issues
Nine months following NTPDE, you were informed that in order to begin the construction of Tunnel Reach No. 1, new power lines will have to be installed by the local utility company. This work will take 12 months to complete by the utility company, but you cannot begin until the permits for the tunneling have been obtained. Also, the cost for this work will be $3,000,000 and has to be added to the project estimate.
An environmental group files a Federal Lawsuit that will delay the permits for Station Pluto by 7-months. Also, the Owner had to spend $250,000 in legal fees and the settlement agreement for lawsuit required the owner to spend $1,000,000 in wetland mitigation. These costs have to be added to the over cost of the project.
Deliverables
Develop an overall program schedule utilizing Microsoft Project or another scheduling software. The schedule should include list each task, duration, lead, and lag. You should also identify the critical path. Your schedule should take into account the scheduling issues described above.
Prepare and submit a construction cost estimate based upon the information provided in this summary.
Provide a written narrative discussing the project schedule which will include the overall duration, the critical path, schedule float and two specific recommendations to speed up the schedule. Your summary should be a minimum of 1,500 words (double spaced).
Provide calculations to support your recommendation to purchase the used TBM. Also, provide a written recommendation summarizing your analysis and what adjustment in the schedule and associated in school need to be made to get the used machine on site and working.
Submit a single document in a PDF format with a cover sheet and table of contents
