Image from page 382 of "Engineering and Contracting" (1909)

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Identifier: engineeringcontr33chicuoft
Title: Engineering and Contracting
Year: 1909 (1900s)
Publisher: Chicago
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: MSN

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Text Appearing Before Image:
m like the original drawing, andafter it had bulged from A to B, they consult-ed Mr. Potter and braced it up by adding10 ft. on downstream side at bottom, takingdown the old part to C. The privilege has not been in use for manyyears. The mill owner below was afraid ofthe dam and its owner dug a channel throughit about 37 ft. wide at the top and 25 ft. deep.The experience on this dam plainly teaches,however unnecessary the lesson appears to be,that a dry wall 32 ft. high with a 20 ft. base,and a vertical downstream face for a third ofthe way up is wholly inadequate. Dam number four was built on the PachaugRiver in the town of Griswold, at a pointwhere the drainage area is 62 square miles.The legal length of the rollway is 82% ft.The plans call for a rollway 110 ft. by 5 ftThe 82% ft. were placed at the legal heightand the balance about 1 ft, higher. The foun-dation is ledge rock. The cross section isshown in Fig. 7. For a height of 23 ft. itcalls for a base of 10 ft. and a 0 ft. coping

Text Appearing After Image:
graveled to within 2 ft. of top and puddled for3 ft. in width from planking. Top of gravelingto slope on an angle of 30°. For further de-

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bookidengineeringcontr33chicuoft bookyear1909 bookdecade1900 bookcentury1900 bookpublisherchicago bookcontributorgersteinuniversityoftoronto booksponsormsn bookleafnumber382 bookcollectiongerstein bookcollectiontoronto

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