Laserfiche WebLink
<br />00311~ <br /> <br />DURING THE IRRIGATION SEASON, AN EMERGeNCY SHUTDOWN WAS REQUIRED TO MAKE TEMPORARY <br /> <br />REPAIRS ON A SECTION OF CONCRETE LINING IN HANSEN SUP~LY CANAL. <br /> <br />IT IS BELIEVED THAT THE <br /> <br />, <br /> <br />COMElINATION OF EXCESSIVE RAINFALL PERCOLATING BEHIND THE' LINING AND A SUDDEN DROP IN THE <br /> <br />FLows BEING RELEASED FROM HORSETOOTH RESERVOIR WERE 80TH INSTRUMENTAL.. IN CAUSING SIX SLABS <br /> <br />O~ CANAL LINING TO SLIP AND TILl INTO THE CANAL PRISM. <br /> <br />EI:ERGE:NCY REPAI RS WERE MADE. WITH <br /> <br />DlS1RlCT PERSONNEL, AND THE CANAL WAS AGAIN OPERATIONAL IN 24 HOURS. <br /> <br />PRIOR TO THE 1968 <br /> <br />IRRIGATION S~ASON, IT WILL BE NECESSARY TO MAKE PERMANENT REPLACEMENT or THE CANAL LINING <br /> <br />IN THIS PARTICULAR AREA. <br /> <br />ArTER SEVERAL.. YEARS OF OBSERVING THE. RESULTS OBTAINED BY THE. BUREAU Or ReCLAMATION <br /> <br />ON EXPERIMtNTAL CRACK AND ~OINT SEALING MATERIALS. THE DISTRICT INITI~TtD ITS OWN PROGRAM <br /> <br />FOR APPLICATION Or CRACK AND ~OINT SEALING MATERIALS. DISTRICT EQUIPM~NT USED FOR THIS <br /> <br />PURPOSE IS VERY SIMILAR TO THAT BEING USED BY THE BUREAU. THE FIRST CANAL AREA TO BE <br /> <br />INCLUDED IN THE CRACK AND ~OINT SEALING PROGRAM CONSISTED OF PORTIONS OF HANSEN SUPPLY CANAL <br /> <br />. <br /> <br />BELO~ H~RStTOOTH RESERVOIR. As CONCR~T( LINING DETERIORATES WITH AGE AND BECAUSe: IT IS <br /> <br />IMPOSSIBLE TO KEEP SECTIONS OF HANSEN CANAL C:OMPLE:TE:t.y ORY DURING THE ANNUAL FRE:e:ZING MIO <br /> <br />THAWIN~ CYCLES. THE: LINING HAS OEVE:LOPED AN ALMOST CONTINUOUS. LONGITUDINAL CRACK AT THE BASE: <br /> <br />OF THE SlOE SLOPE. THE ORIGINAL, MASTIC MATERIAL USEO TO FILL THE GROOVED, CONSTRUCTION <br /> <br />JOINTS HAS CETERIORATED BADLY. ITS EFrlCIENCY fOR PREVENflNG SEEPAGE OF WATER THROUGH THE <br /> <br />LINING JOINTS IS ALMOST NIL. PRIOR TO TH~ 1967 IRRIGATION SEASON, DISTRICT PER~ONNEL APPLIED <br /> <br />410 GALLONS OF RUBBERIZED. ASPHALT MASTIC FOR SEALING CRACKS AND GROOVED ~O'NTS. TOTAL COST <br /> <br />INClUOING MATERIALS, EQUIPMENT. AND LABOR AMOUNTED TO APPROXIMAT~LY $2,500. UNIT COST PER <br /> <br />LINEAL fOOT OF MASTIC MATERIAL APPLIED WAS APPROXIMATELY 12 CENTS PE:R LINEAL FOOT. <br /> <br />DURING THE MAINTENANCE SEASON OF '959-1960. THE STILLING POOL AND SIPHON ON THE ST. <br /> <br />VRAIN SUPPLY CANAL BELOW LYONS TUNNEL WAS DE-WATERED AND CLEANED. <br /> <br />A TOPPING or CEMENT AND <br /> <br />, <br /> <br />~MA~l AGGREGATE WITH AN EPOXY COATING WAS PLACtD TO REPAIR EROSION or THE STILLING POOL <br /> <br />FLOOR WHER~ THE REINFORCING STEEL WAS THEN EXPOSED. DURING THE SPRING Or THE 1967 IRRIGA- <br /> <br />. <br /> <br />TION SE:Asorl. THE SIPHON AND S"TILLING POOL WERE AGAIN PUMPED AND CLEANEO. <br /> <br />INSP(CTION SHOWED <br /> <br />-20- <br />