New Britain herald., 1926-08-05
DAM BUILDERS ID
 UTILIZE STREAM
Mill Make Water Aid in Con- StruCtiOn Work

Bridgeport, Aug. s. The last three or four miles of the Rocky river at New Milford will be cur off within few months drying the bed of the stream which for cen- teuries has rushed madly through the rocky slopes of lower Litchfield iounsy. Engineers of the Connecti- cut Light and Power company, which has begun the construction of a big dam few miles above the mouth of the river, were visited yesterday afternoon by J. Henry Roraback, president of the company.
 Dam at Jerusalem
 It was disclosed that the engir-. eers plan to erect a temporary dan, just below Jerusalem, which would be about two miles upstream from the site of the proposed permanent dam. The purpose of this tempor- ary earth dam is to create d reser- voir. from which the water will be released through sluiceway to a point near the permanent site. The water will descend abruptly. devel- oping considerable force. This wat ter, under the terrific pressure, will be turned against the hillsides at the point of the permanent dam to wash gravel and rocks into the ba- sin at the bottom, and in this man. ner the rl.ajor part of the big dam will be built. A base 500 feet thick will be built up to an altitude of about TO feet, and earth for the re- maining 30 feet of the dam will be conveyed by other meaLs.
 The effect of the engineering op- peration described is to put the Rocky river to work at once build ing the dam which is to hold 1t pris- oner and gradually cause it's waters to back up r miles through the valleys of Litchfield and Fairfield counties, as far as Danbury.
 Three Dykes Projected,
 Three dykes will have to be built. it was brought out today. One will be at the extreme end of the IT, mile lake, north of Danbury, and will hold the water to a point just east of Doyles Pond in that city. Another dyke, about 1000 feet long, will be built at North Lanesville, about three miles back from the permanent dam, and a third dam, about 1900 feet long. isto be con- structed at South Lanesville.
 That part of the Rocky river be- 2 roipt he1ouv and the main dam will be perman- ently erased from the map within fw months. In it's place will be built a permanent sluiceway, to be available as a safety valve through out the entire period of construc- tion. The sluiceway will be closed where 1t passes under the dam, af- ter the main project has been fin ished.
 Aids to River.
 The Rocky river will be aided by dynamite and gunpowder in it's eroromus task. Five-inch well holes will be drilled into rocks and earth. into which dynamite will be placed and exploded. Dynamite presses downward, engineers explained. h. to the cavity created by the explo- sion of dyna mite, gunpowder will be dropped and exploded. The action Of gunpoWder Is upward, throwing the earth and rocks up where they can be more conveniently washed down into the earth dam formation by the use of hoses connected with the sluiceway, whose streams will be so powerful as to require three men to hold them.
 The work! is to be pushed right through the winter in an effort to have the dam ready 10 impound all the water of next springs freshets. Scores of. men are already on the job working over wide area and 8 small village of buildingss providing sleeping quarters. eating rooms, Kitchens, engineers headauarters. paynasters' quarters, general ad- offices and various SUD- ply houses are being erected rapid " The place Is a beehive of activi-