Having visited all the great natural wonders along the
Pacific coast it was time to check out some of man's greatest
accomplishments as we headed back east into Nevada. While staying
in Las Vegas we ran across to the Arizona border to see the
Colorado river and one of the seven man made wonders of America.
Hoover Dam stands out as a magnificent achievement in
architectural accomplishments. Fed by snows in the northern
Rockies, the Colorado river has always been a river of violent
change. Mass flooding in the spring time to a dried river bed in
the fall, the river needed to be harnessed. So in 1922, the seven
states surrounding the river and the federal government
signed a agreement known as the Colorado River Compact. This
agreement split the waters flowing down the river into two basin,
the Upper and the Lower. States in these areas were to split the
waters among themselves. At the time, no consideration was made
for Mexico. That changed in 1944. Six years after the compact was
signed, Congress created the
Boulder Canyon Project Act and Hoover Dam
became a reality. Today it is an attraction run by the Bureau of
Reclamation which operates a visitors center and offers tours
through the inside of the Dam and the working power generation
wings. This is were we met Greg Burkhart, our guide. You can
always tell when the person taking you around is really into his
job. It shows in the little things that he remembers about the
days of construction and the present day-to-day operations. In
the parking lot that led to the visitors center were very large
multi-language signs which stated that no purses, backpacks or
camera cases would be allowed inside the building or the Dam.
This proved to be highly enforced as the guy in front of me tried
to get his camera case
through and was grabbed by the guards and
escorted out. They really did mean business. Other than that, the
place was spotless and filled with all sort of interesting things
about the Dam and the land around it. Access to the bottom of the
Dam is by elevator which holds slightly less than 100 people per
trip when they are really packing them in, and our trip was
packed. As we wandered along Greg produced a constant stream of
facts and figures about the construction. He was particularly
attentive to the young kids often engaging them in conversation
with questions on what they thought. The construction, which took
4 years,
utilized thousands of people. A small town grew
up around the work. The construction was primarily made up of
thin layers of concrete, one on top of the other. The bottom
layer is 660 feet thick and climbs 726 feet to the top where it
is only 45 feet across. It stretches over 1200 feet from side to
side. It was estimated that the concrete will take some 1500
years to completely cure. The Dam should last at least another
3500 years after that. It was built in an arch, or slightly
rounded against the water. This causes the Dam to be pushed
into
the rock walls by the weight of the water which it holds back.
About two years of runoff from the river is stored in Lake Mead
which was created by the Dam. This amounts to over one and a
quarter trillion cubic meters of water. Lake Mead now stretches
back over a hundred miles to create one of the areas most
attractive recreational areas. Two wings stretch out from the
outside base of the Dam. These house the 17 massive hydroelectric
generators which produce the 2 billion watts of power supplied to
Nevada, Arizona and California. The Dam continues to be an
attraction with upwards of 4000 visitors a day, and over a
million a year. This is worth the trip. I give it good marks for
making it available to visit and for the knowledgeable guides
like Greg.
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