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• 41. [Image] "M" Canal lining placed by Japanese internee labor in 1945

  	KP-1742-R2 - Klamath Project. 4" reinforced concrete lining, edged joints. Picture shows transverse cracking normally at mid panel, with an occasional crack at the third points. Fractures occur only ...
  	Citation × Citation Citation Abstract Copy Title: "M" Canal lining placed by Japanese internee labor in 1945 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1742-R2 - Klamath Project. 4" reinforced concrete lining, edged joints. Picture shows transverse cracking normally at mid panel, with an occasional crack at the third points. Fractures occur only occasionally in the length of the lining. No other cracking apparent; October 19, 1948; Photo by H. F. Tolley Title: "M" Canal lining placed by Japanese internee labor in 1945 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1742-R2 - Klamath Project. 4" reinforced concrete lining, edged joints. Picture shows transverse cracking normally at mid panel, with an occasional crack at the third points. Fractures occur only occasionally in the length of the lining. No other cracking apparent; October 19, 1948; Photo by H. F. Tolley Close

• 42. [Image] Shrinkage in Type "C" compacted lining in M-2-a-2 Lateral, Coppock Bay, California

  	KP-1532-R2 - Klamath Project. Picture taken after a block of compacted earth was removed from between the shrinkage cracks in the preceding picture. Note smaller cracks in earth below removed block; August ...
  	Citation × Citation Citation Abstract Copy Title: Shrinkage in Type "C" compacted lining in M-2-a-2 Lateral, Coppock Bay, California Author: United States. Bureau of Reclamation, Grise, Dorwin Year: 1947, 2006, 2005 KP-1532-R2 - Klamath Project. Picture taken after a block of compacted earth was removed from between the shrinkage cracks in the preceding picture. Note smaller cracks in earth below removed block; August 29, 1947; Photo by Dorwin Grise; The slide-rule case has the photographer's last name and initials on it: "D.E. Grise" Title: Shrinkage in Type "C" compacted lining in M-2-a-2 Lateral, Coppock Bay, California Author: United States. Bureau of Reclamation, Grise, Dorwin Year: 1947, 2006, 2005 KP-1532-R2 - Klamath Project. Picture taken after a block of compacted earth was removed from between the shrinkage cracks in the preceding picture. Note smaller cracks in earth below removed block; August 29, 1947; Photo by Dorwin Grise; The slide-rule case has the photographer's last name and initials on it: "D.E. Grise" Close

• 43. [Image] "B" Canal check structure

  	Roll 2 No. 6 - Klamath Project. Note that horizontal construction joint is badly weathered. As in "A" Canal concrete lining shown in previous pictures, horizontal joint is badly weathered indicating the ...
  	Citation × Citation Citation Abstract Copy Title: "B" Canal check structure Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 2 No. 6 - Klamath Project. Note that horizontal construction joint is badly weathered. As in "A" Canal concrete lining shown in previous pictures, horizontal joint is badly weathered indicating the retention of moisture on the horizontal joint subjects the joint to more severe weathering due to freezing action; October 19, 1948; Photo by H. F. Tolley Title: "B" Canal check structure Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 2 No. 6 - Klamath Project. Note that horizontal construction joint is badly weathered. As in "A" Canal concrete lining shown in previous pictures, horizontal joint is badly weathered indicating the retention of moisture on the horizontal joint subjects the joint to more severe weathering due to freezing action; October 19, 1948; Photo by H. F. Tolley Close

• 44. [Image] "E" Canal, plain 2 1/2" concrete lining placed in 1924

  	KP-1735-R2 - Klamath Project. Picture at Sta. 59-10 of patched joint cracked through. Joints originally edged have opened considerably. Lining is badly fractured at several points by frost heave, with ...
  	Citation × Citation Citation Abstract Copy Title: "E" Canal, plain 2 1/2" concrete lining placed in 1924 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1735-R2 - Klamath Project. Picture at Sta. 59-10 of patched joint cracked through. Joints originally edged have opened considerably. Lining is badly fractured at several points by frost heave, with sections being displaced into the canal. Annual procedure is to repair joints and fractures by pouring sand cement mortar over cracks just prior to irrigation season, which seals joint temporarily for service. However, subjected to winter freezing with resultant heaving, the patching is completely destroyed. It is possible that mastic joint filler may withstand this action and reduce annual maintenance. This lining is situated in side hill cut through porous material where water tightness is essential; October 19, 1948; Photo by H. F. Tolley Title: "E" Canal, plain 2 1/2" concrete lining placed in 1924 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1735-R2 - Klamath Project. Picture at Sta. 59-10 of patched joint cracked through. Joints originally edged have opened considerably. Lining is badly fractured at several points by frost heave, with sections being displaced into the canal. Annual procedure is to repair joints and fractures by pouring sand cement mortar over cracks just prior to irrigation season, which seals joint temporarily for service. However, subjected to winter freezing with resultant heaving, the patching is completely destroyed. It is possible that mastic joint filler may withstand this action and reduce annual maintenance. This lining is situated in side hill cut through porous material where water tightness is essential; October 19, 1948; Photo by H. F. Tolley Close