You are planning an excavation activity using a hydraulic excavator with a bucket capacity of 3 CY and a maximum digging depth of 25 feet. The material for this excavation is a well blasted rock giving a bucket fill factor of 75% and a swell percent of 60%. The swing angle is 50 and the average depth of the cut is 14 feet. The cost of the excavator and operator is $230/hr and on this operation a 45 minute hour is anticipated. The standard cycle times (including adjustment for dumping into a truck) for this machine are as follows:

• Load time - 7 seconds
• Swing loaded time - 6 seconds
• Dump bucket - 5 seconds
• Swing empty - 4 seconds