Your manager has handed you an estimating assignment. You work for a contractor based in Langley, BC. The City of Coquitlam is constructing a 300mm dia. storm main that is 1,200 metres long in the river flats off Mariner Way. The site is on the dry side of the dikes so you dont anticipate significant ground water. The starting end has an invert of 1.1m below grade and the discharge end has an invert of 1.5m below grade. The tie in at each end is by Others. The specification indicates the pipe needs 300mm of imported cover as well as a minimum 100mm bed and 300mm on each side. Please prepare your price to build this sewermain using the following information Labour - Labourers have a $31/hr base wage rate - Operators have a $36/hr base wage rate - Vacation pay is 6% - Worksafe BC premium is $3.25/$100 in insurable earnings - There is a burden of $1/hr for misc benefits Equipment - Excavator o The company plans to purchase a good used excavator for $125,000. This will be depreciated over 5 years, ie to zero value o The excavator will burn about $28/hr in fuel o It requires a $1,500 service every 250 hours o It consumes about $10/day in grease/misc. consummables o It will need new bucket teeth and bucket repair of $2,000/yr - Compactor rate is $45/hr while onsite - Small generators are $2,500/mth to rent based on 200hrs/mth Material - 300mm ductile iron pipe is $65/m + tax delivered to site - Bedding gravel is $18/tonne + tax delivered to site, with a compacted density of 2.2Tonnes/m3 Subs/Services - A Surveyor for layout and as-built are $150/hr - Operated Dump Trucks w/ Pup for spoil disposal are $145/hr. They haul an average of 10 m3 per cycle and the disposal facility is 40mins away and charges $20/box tipping fee. Note, we will assume the soil is tested and clean - Grass seed sub will install at $8/m2 - Delivery flat decks or similar are $90/hr - Low beds suitable to this project are $190/hr - A site trailer can be rented for $750/mth + tax, same for a lunch trailer - Compaction testing is needed every 500m3 installed for a rate of $250/test Name:___________________ Student No.:______________ 2 General Conditions or Overhead and Profit - As this is a local job, you will only apply your Superintendent, $75/hr at 50% of job time. The Supt pickup is $15/hr. - Insurance is at 1% of cost - Bonding is at $6/$1000 - General office overhead is 8% of cost - Profit, we will apply a 4% markup Production - Your superintendent suggests a crew of Excavator, operator, and 2 labourers can excavate at 30m3/hr. The same crew can install pipe at 40 lineal metres / day including the underside bedding. It can backfill both cover bedding and native soil at 200m3/shift. This is based on 10hr shifts x 5 days per week. You are to provide the following - Provide any necessary sketches - List any assumptions made to complete your estimate - Show necessary math to demonstrate quantity calculations and durations etc - Build up the cost and price based on the information provided, AND your learnings from the course, using the cost sheet format or similar excel spreadsheet. Complete the following table in summary: Item Description Quantity Unit Unit Price Price 1 Mobilization Including Demobilization 1 Lump Sum 2 Supply & Install Storm main 1,200 /m