Laserfiche WebLink
<br />(. . Fj" <br />,~ ~ .J ...J <br /> <br />2B <br /> <br />'I [ THO PO LT TAN \I' A T [R f) 1ST HIe T <br /> <br />en-nuis, conduit,'), sipholl,'), t/lnnd.~. -reEw/'-voirs <br /> <br />The maintenance force on canals, conduits, siphons, tunnels, and <br />Gene and Copper Basin reservoirs varied from 6 to 10 men. At <br />times ~ome of the regular crew were used on temporary assign- <br />ments at various locations on the distribution system including <br />La Verne. San Gabriel Canyon, Lake Mathews, and on the con- <br />struction of the Orange County feeder extension to Coastal Mu- <br />nicipal Water District. Routine maintenance work included patrol, <br />inspection, water sampling. and cleaning of sand and debris <br />from the open canal, siphon ends. forebays. arlll sandt;'aps; filling <br />and tamping settled areas and cracks along and under canal lining; <br />maintenance of storm drainage channel:-:;; painting of structures; <br />upkeep and repair of motor vehicle~ and maintenance equipment; <br />hauling supplies; treatment of all open water when necessary with <br />copper sulphate for control of algae; and grading and upkeep of <br />District roads and hig-hways, In September 1942.. approximately <br />two thirds of Gene reservoir was treated with copper sulphate, <br />There were two periods of pumping water from the Colorado <br />River to Lake Mathews, the first from October 15 to November <br />22, 1942. except for a 10-day shutdown between October 19 and 29, <br />and the second from May 2] to June 25, 19~3, In the first pumping <br />period, the storage in Lake Mathews was increased from 71,000 <br />to 81.200 acre feet; and in the second period from 74,150 to 85,000 <br />acre feet. In addition to these two periods of delivery to Lake <br />l\1athews. water was relea:sed from Copper Basin reservoir peri- <br />odically as required to fill variou, water storage sections along the <br />canal, in siphons. and fOl'ebay re:servoirs for u~e of District camps <br />and the United States Army training centers as far west as Camp <br />Young near Shaver's Summit. <br />Following the fir:-;t pumping period, and with the advent of <br />colder water. a number of leab developed in the concrete barrel <br />of Freda siphon, a 12'4" diameter circular monolithic rein- <br />forced concrete' pressure conduit some :3 miles long located west <br />of Rice, During the latter part of January 1943 the siphon was <br />unwatered and repairs made by chipping out the cracks, calking <br />with lead wool and oakum, then dry-packing with cement and <br />coating with curing compound. One larger than ordinary crack <br />was exposed around the outside and treated the same as the inside, <br />after which a concrete collar \Va:.:. cast ent.irely around the siphon. <br />Repair work was completed Februar,' 25, During March. Pinto <br />siphon was partially un watered and three leaks repaired, One of <br /> <br />~ <br />