Doug, let’s begin with a 1,179 mile, schedule 40, 36” pipe which weighs about 283 pounds per linear foot. That requires ((1179 mile x 5280 ft./mile x 283 lbs./ft.) / 2000 lbs./ton =) 881thousands tons of steel to begin with. While it would take only about a month or so to produce this incremental amount of raw steel, fabricating the 36” pipe within the U.S. will take a many months (assuming its domestically produced). Then you have to dig the trench, producing ((1,179 mile x 5,280 ft./mile x 5ft. wide x 10ft. deep) / 36 cuft./yd. = ) 8.6 million cubic yards or about 10 million tons of removed dirt+rock. Yes, modern excavation equipment can dig and move about 5 tons/minute of dirt+rock and let’s assume there are 20 excavation crews in operation 8 hours per day, this would take at least 7 months to dig the trench. It will of course take somewhat longer due to the complexities of crossing water streams or rivers and other environmentally sensitive areas in order to safely and cleanly route the pipe through these more complex areas.
In parallel to digging the trenches, the 50 ft. pipeline sections or (1,179 miles x 5280 ft.) / 50 ft./section =) 125 thousand 50’ pieces of pipe must be transported from the fabrication facilities to the field construction sites. Next the pipe sections must be welded (125,000 pipes x 9.4 ft. weld length/pipe = 1.2 million linear feet of welds), which will take another 20+ construction crews several more months to complete (at least), followed by lifting the longer-multiple pipe sections into the trenches. Then the pipe must be inspected and hydro-tested before being buried. Correcting and repairing substandard welds adds a few more weeks. And, did I mention the time required to restore and reveg. the surface above the pipe after burying it.
As far as the 19 or 24 pump stations, it probably takes much fewer than 19 sales people to market the equipment. And, at least 100 production/fabrication operators-mechanics just to produce up to almost 100 large pumps (including spares) required to fully and reliably pump 830 KBD of oil, 1179 miles, 24-7. Of course the scope of the work is much greater than just the pumps, electric drivers, foundations and valves. Each pump station requires installation of utilities (power lines/transformers & water supplies), operating controls-communication equipment (including computers and wireless/hardwire systems), and maintenance infrastructures (access roads, on-site storage, shops, etc.).
How many of these jobs are labeled as construction, manufacturing and support services jobs of course depends based on how the overall job is planned, scheduled, executed and managed. The Federal Government’s estimate of only 1,950 construction jobs required to do the above listed work within just 2 years, in addition to the numerous other required workloads (safety, inspection, security, administration, etc.) is grossly underestimated.