nna and Western Railroad would be slightly
shifted or raised for 3-3/4 miles.
A dam 2,400 feet long and 80 feet in height, with tunnels,
wasteweir, and accessory works would be required at Mountain View.
The situation is such that an ample wasteweir may be built at a
low-side dam on the solid rock of Hook Mountain remote from the
dam, and outlets may be had by tunneling the same ridge. Hence the
dam may be a plain, heavy earthen embankment; built, of course,
with every precaution but subject to less than the usual dangers of
such works. However, a masonry dam might readily be substituted.
There would be 14,000 acres of arable land, swamps, and rough
mountain land flowed.
The works are estimated to cost as follows:
Railroad and canal diversions $505,000
Dam and accessory works 1,162,000
Land damages 1,400,000
_________
Total 3,067,000
A recomputation of the drainage area above Mountain View, made by the
northern New Jersey flood commission, shows that it is 380 square miles
in extent. It was decided by this commission that the construction of
this reservoir would be the most approved method of preventing
disastrous floods in the lower valley of the Passaic. By raising a dam
to a height of 202 feet above tide, 8 inches of water on the drainage
area above might be held back, which, it was believed, would be a
sufficient maximum for flood catchment. With this amount of storage the
estimates of the flood commission showed that the remainder of the
drainage area would not turn a sufficient amount of water into the lower
valley channel to cause flood damages.
It was also demonstrated by the flood commission that by increasing the
height of the dam an opportunity would be afforded for conserving water,
and at the maximum height of 220 feet above tide sufficient storage
capacity would be available to provide 5,000 horsepower at Little Falls,
Great Falls, and Dundee dam throughout all dry seasons. The value of
such a storage reservoir for municipal water-supply purposes is
self-evident.
The cost of Mountain View reservoir would be about $3,340,000. Developed
for flood catchment with the spillway of the dam at 202 feet above sea
level the area of the reservoir would be 13.4 square miles,
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