File:Architect and engineer (1922) (14595086509).jpg

Identifier: architectenginee7022sanf (find matches)
Title: Architect and engineer
Year: 1905 (1900s)
Authors:
Subjects: Architecture Architecture Architecture Building
Publisher: San Francisco : Architect and Engineer, Inc
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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naire Gate at the Oliver SaltWorks, Mount Eden. Calif. connection with duck ponds, log pondsand seashore lakes. A pipe installeilwith an automatic gate on the outer endresults in ridding land of surface water and maintaining it in that condition inthe face of later rises of the water in thedrainage way; but a reversed installa-tion (the gate on the inlet end of thepipe) will work in the opposite way, thatis, it will tend to maintain a pond insidethe dike at a level corresponding withthe high level of the tide or river. When-ever the water rises outside the dike itflows freely into the pond, but as soon asits level falls below that of the pond thegate closes and the water is retained.The advantages are obvious. Ponds, lakes and storage reseivoirs can be main-tained throughout the year at the highestlevels reached by any neighboring bodyof water save for such losses as occurthrough evaporation and seepage, andthis without any expenditure for poweror supervision. At lumber mills, on duck
Text Appearing After Image:
Automatic Gates on a Tropical DrainageProject preser\-es, salt works and at riversideand seaside parks such a device becomesof great practical importance. Now comes a still further developmentof the same idea. There are many situa-tions where it is desirable to maintainponds at certain seasons and at otherrimes to drain the land so that it maybe used for other purposes. Sometimestlie same areas can be made to serve asduck ponds in the fall and winter monthsand as cattle pasture in the spring andsummer. This can readily be accom-plished by having automatic gates atboth ends of the corrugated pipes thatextend through the dikes. Those on theinner or re.ser\oir ends will .serve to es-tablish and maintain the ponds and thoseon the outer ends to drain them and pre-vent re-flooding. It is necessary, how-ever, to raise the gates that are not inuse and support them in some way sothat they will remain open. A simple de-vice for this purpose consists of an eye-bolt near the lower edge of the val

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