Directions sean is writing a research paper on the building of the hoover dam. his research question is what made the hoover dam the most amazing engineering accomplishment of its time? read sean’s draft and answer the following questions. note: sean has not yet included page numbers for his sources. hoover dam: conquering the mighty colorado river (1) hoover dam, sometimes referred to as boulder dam, was constructed between 1931 and 1935 to harness the waters of the wild colorado river. (2) the dam was a challenging task for even the most experienced professionals. (3) many have called hoover dam a wonder of the modern world because of its unprecedented massive size and its designers’ ingenuity in overcoming obstacles that were considered impossible barriers at the time (stevens). (4) hoover dam is 726.4 feet high, more than twice the height of the highest dam built before it. (5) it is 1,244 feet across the top and 660 feet thick at the bottom. (6) it weighs 6.6 million tons and contains more than 3.25 million cubic yards of concrete (“hoover dam”). (7) hoover dam set the precedent for modern dam-building technology, though there are higher and more massive dams today. (8) the engineers who designed hoover dam came up with ingenious solutions to the problems of building such a massive concrete structure. (9) for example, they first had to figure out how to force the river to flow around the construction site. (10) to solve this problem they built four huge diversion tunnels to take the water through the canyon walls while they were building the dam. (11) another seemingly insurmountable problem was that the concrete would have taken over a century to cool completely if it had been poured in one huge form. (12) to overcome this, the engineers came up with a building-block system and a network of cooling tubes to speed the process. (13) engineers also invented a complex system of cables and pulleys to transport materials and worke