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• 1. [Image] "E" Canal between Stations 21-70 and 35-20

  	KP-1734 - Klamath Project. Four-inch reinforced concrete lining placed in 1935. Note joints edged, fine cracks apparent at bottom of slope. Concrete in good condition. October 19, 1948; Photo by H. F. ...
  	Citation × Citation Citation Abstract Copy Title: "E" Canal between Stations 21-70 and 35-20 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1734 - Klamath Project. Four-inch reinforced concrete lining placed in 1935. Note joints edged, fine cracks apparent at bottom of slope. Concrete in good condition. October 19, 1948; Photo by H. F. Tolley Title: "E" Canal between Stations 21-70 and 35-20 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1734 - Klamath Project. Four-inch reinforced concrete lining placed in 1935. Note joints edged, fine cracks apparent at bottom of slope. Concrete in good condition. October 19, 1948; Photo by H. F. Tolley Close

• 2. [Image] "E" Canal lining at approximately Station 59-40, showing open joint

  	KP-1736-R2 - Klamath Project; October 19, 1948; Photo by H. F. Tolley
  	Citation × Citation Citation Abstract Copy Title: "E" Canal lining at approximately Station 59-40, showing open joint Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1736-R2 - Klamath Project; October 19, 1948; Photo by H. F. Tolley Title: "E" Canal lining at approximately Station 59-40, showing open joint Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1736-R2 - Klamath Project; October 19, 1948; Photo by H. F. Tolley Close

• 3. [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