Armour Engineer, Vol. 6 (Classic Reprint)

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September 2015



Excerpt from Armour Engineer, Vol. 6

Accordingly, the Blue Island avenue tunnel was constructed, to replace this section with an alignment following the public streets.

The Blue Island avenue tunnel was put into operation during the year 1909, after which time the old Cross-town tunnel was abandoned.

It being the experience that the cost of maintaining the Two-Mile Crib was excessive, plans were considered in 1907 and it was practically then decided to abandon this crib by constructing a new crib farther out in the lake and to extend the three tunnels supplied by the Two-Mile Crib to the new crib.

With this end in view, the Blue Island avenue tunnel, 8 feet in diameter, was commenced, with the sinking of Shaft No.1, located in Delaware place, just east of Lincoln Parkway.

A stub was extended easterly from this shaft 440 feet, it being the intention at some future date to extend this tunnel out to the above mentioned new crib.

In order to supply water temporarily to the Blue Island avenue tunnel, a connection was driven south in Lincoln Parkway from Delaware place and around the Chicago avenue water tower to a connection with Shaft Moutside of the Chicago avenue pumping station.

In practical operation it was found that the water taken from this shaft was lowering the level of the water in the wells of the Chicago avenue pumping station, thus interfering with its supply, as well as with that of the 22nd street station.

This became particularly acute during the year 1911-1912, when the capacity of the 22nd street pumping station was increased from 60 to 100 million gallons per 24 hours by means of the addition of two 20 million gallon electrically driven centrifugal pumps.

Samples of water taken at the Two-Mile Crib show water equally pure with those taken at other cribs located farther out in the lake.

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EAN: 9781330499320
ISBN: 1330499328
Untertitel: Paperback. Sprache: Englisch.
Verlag: Forgotten Books
Erscheinungsdatum: September 2015
Seitenanzahl: 310 Seiten
Format: kartoniert
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