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• 21. [Image] "A" Canal concrete lining facing upstream from tunnel portal

  	Roll 3 No. 5 - Klamath Project. Note horizontal and vertical cracking, with severe weathering. Also, note bulging of sides, particularly on left side of picture; October 20, 1948; Photo by H. F. Tolley ...
  	Citation × Citation Citation Abstract Copy Title: "A" Canal concrete lining facing upstream from tunnel portal Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 5 - Klamath Project. Note horizontal and vertical cracking, with severe weathering. Also, note bulging of sides, particularly on left side of picture; October 20, 1948; Photo by H. F. Tolley Title: "A" Canal concrete lining facing upstream from tunnel portal Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 5 - Klamath Project. Note horizontal and vertical cracking, with severe weathering. Also, note bulging of sides, particularly on left side of picture; October 20, 1948; Photo by H. F. Tolley Close

• 22. [Image] "A" Canal Headworks from downstream side

  	Roll 3 No. 6 - Klamath Project; October 20, 1948; Photo by H. F. Tolley
  	Citation × Citation Citation Abstract Copy Title: "A" Canal Headworks from downstream side Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 6 - Klamath Project; October 20, 1948; Photo by H. F. Tolley Title: "A" Canal Headworks from downstream side Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 6 - Klamath Project; October 20, 1948; Photo by H. F. Tolley Close

• 23. [Image] "A" Canal adjacent to Headworks on left side, showing complete fracturing and weathering of sections

  	Roll 3 No. 7 - Klamath Project. Note large hole, with earth backing of panels washed out. Surface of concrete completely gone; October 20, 1948; Photo by H. F. Tolley
  	Citation × Citation Citation Abstract Copy Title: "A" Canal adjacent to Headworks on left side, showing complete fracturing and weathering of sections Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 7 - Klamath Project. Note large hole, with earth backing of panels washed out. Surface of concrete completely gone; October 20, 1948; Photo by H. F. Tolley Title: "A" Canal adjacent to Headworks on left side, showing complete fracturing and weathering of sections Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 No. 7 - Klamath Project. Note large hole, with earth backing of panels washed out. Surface of concrete completely gone; October 20, 1948; Photo by H. F. Tolley Close

• 24. [Image] A Canal concrete lining showing Sections 6 & 7 from the Headworks

  	Roll 3 - No. 8 - Klamath Project. The section on the left is a replaced section of reinforced concrete and the one on the right an old section in need of replacement October 20, 1948; Photo by H. F. To...
  	Citation × Citation Citation Abstract Copy Title: A Canal concrete lining showing Sections 6 & 7 from the Headworks Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 - No. 8 - Klamath Project. The section on the left is a replaced section of reinforced concrete and the one on the right an old section in need of replacement October 20, 1948; Photo by H. F. Tolley Title: A Canal concrete lining showing Sections 6 & 7 from the Headworks Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 Roll 3 - No. 8 - Klamath Project. The section on the left is a replaced section of reinforced concrete and the one on the right an old section in need of replacement October 20, 1948; Photo by H. F. Tolley Close

• 25. [Image] "A" Canal lined section, showing panels on right side of canal approximately 100 feet downstream from the Headworks

  	KP-1728-R2 - Klamath Project. Note horizontal fractures, possibly due to settlement. Joints are severely weathered and spalled. Winter freezing creates a heaving action, which causes spalling of the ...
  	Citation × Citation Citation Abstract Copy Title: "A" Canal lined section, showing panels on right side of canal approximately 100 feet downstream from the Headworks Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1728-R2 - Klamath Project. Note horizontal fractures, possibly due to settlement. Joints are severely weathered and spalled. Winter freezing creates a heaving action, which causes spalling of the joints. October 18, 1948; Photo by H. F. Tolley Title: "A" Canal lined section, showing panels on right side of canal approximately 100 feet downstream from the Headworks Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1728-R2 - Klamath Project. Note horizontal fractures, possibly due to settlement. Joints are severely weathered and spalled. Winter freezing creates a heaving action, which causes spalling of the joints. October 18, 1948; Photo by H. F. Tolley Close

• 26. [Image] "A" Canal lining 300 to 500 feet downstream from the Headworks, facing downstream

  	KP-1730 - Klamath Project. Severely weathered horizontal fractures and vertical joints, with concrete surface completely gone. Note horizontal cracks more severely spalled and weathered than the vertical ...
  	Citation × Citation Citation Abstract Copy Title: "A" Canal lining 300 to 500 feet downstream from the Headworks, facing downstream Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1730 - Klamath Project. Severely weathered horizontal fractures and vertical joints, with concrete surface completely gone. Note horizontal cracks more severely spalled and weathered than the vertical joints, possibly due to retained moisture on the horizontal cracks subjected to freezing causing excessive weathering. Note, also, definite signs of heaving, indicated by angular displacement of the vertical joint; October 18, 1948; Photo by H. F. Tolley Title: "A" Canal lining 300 to 500 feet downstream from the Headworks, facing downstream Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1730 - Klamath Project. Severely weathered horizontal fractures and vertical joints, with concrete surface completely gone. Note horizontal cracks more severely spalled and weathered than the vertical joints, possibly due to retained moisture on the horizontal cracks subjected to freezing causing excessive weathering. Note, also, definite signs of heaving, indicated by angular displacement of the vertical joint; October 18, 1948; Photo by H. F. Tolley Close

• 27. [Image] "A" Canal 2-inch gunite lining at approximately Sta. 23

  	KP-1732-R2 - Klamath Project. "A" Canal 2-inch gunite lining at approximately Sta. 232, illustrating exposed wire-mesh reinforcing. Note upheaval and lateral slippage due to expansion. Sections of lining ...
  	Citation × Citation Citation Abstract Copy Title: "A" Canal 2-inch gunite lining at approximately Sta. 23 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 2007, 2005 KP-1732-R2 - Klamath Project. "A" Canal 2-inch gunite lining at approximately Sta. 232, illustrating exposed wire-mesh reinforcing. Note upheaval and lateral slippage due to expansion. Sections of lining completely disintegrated by heaving and frost action, exposing the wire mesh. October 18, 1948; Photo by H. F. Tolley Title: "A" Canal 2-inch gunite lining at approximately Sta. 23 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 2007, 2005 KP-1732-R2 - Klamath Project. "A" Canal 2-inch gunite lining at approximately Sta. 232, illustrating exposed wire-mesh reinforcing. Note upheaval and lateral slippage due to expansion. Sections of lining completely disintegrated by heaving and frost action, exposing the wire mesh. October 18, 1948; Photo by H. F. Tolley Close

• 28. [Image] "C" Canal plain 4" concrete lining placed in 1920

  	KP-1737-R2 - Klamath Project. Picture taken at approximate Sta. 604 - 75 ft. downstream from end of flume section. Sections 10' with marked joints. Note severe cracking both horizontally and vertically, ...
  	Citation × Citation Citation Abstract Copy Title: "C" Canal plain 4" concrete lining placed in 1920 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1737-R2 - Klamath Project. Picture taken at approximate Sta. 604 - 75 ft. downstream from end of flume section. Sections 10' with marked joints. Note severe cracking both horizontally and vertically, with considerable bulging. Bottom concrete over most of lining completely disintegrated, leaving only the aggregate on the floor. Transverse cracks occur most generally at midpoints of sections, but occasionally at the third points; October 19, 1948; Photo by H. F. Tolley Title: "C" Canal plain 4" concrete lining placed in 1920 Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1737-R2 - Klamath Project. Picture taken at approximate Sta. 604 - 75 ft. downstream from end of flume section. Sections 10' with marked joints. Note severe cracking both horizontally and vertically, with considerable bulging. Bottom concrete over most of lining completely disintegrated, leaving only the aggregate on the floor. Transverse cracks occur most generally at midpoints of sections, but occasionally at the third points; October 19, 1948; Photo by H. F. Tolley Close

• 29. [Image] "J" Canal lined section Sta. 852-00 to 862-00, 4" reinforced concrete

  	KP-1740-R2 - Klamath Project. Picture at approximate Sta. 860, 14 sections from downstream end of lined section, showing panel adjacent to panel washed out and replaced in 1947. Note panel undermined ...
  	Citation × Citation Citation Abstract Copy Title: "J" Canal lined section Sta. 852-00 to 862-00, 4" reinforced concrete Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1740-R2 - Klamath Project. Picture at approximate Sta. 860, 14 sections from downstream end of lined section, showing panel adjacent to panel washed out and replaced in 1947. Note panel undermined and settled with vertical displacement and horizontal fractures. Four panels badly fractured; October 19, 1948; Photo by H. F. Tolley Title: "J" Canal lined section Sta. 852-00 to 862-00, 4" reinforced concrete Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1740-R2 - Klamath Project. Picture at approximate Sta. 860, 14 sections from downstream end of lined section, showing panel adjacent to panel washed out and replaced in 1947. Note panel undermined and settled with vertical displacement and horizontal fractures. Four panels badly fractured; October 19, 1948; Photo by H. F. Tolley Close

• 30. [Image] "J" Canal lined section at Sta. 858 facing upstream

  	KP-1741-R2 - Klamath Project. "J" Canal lined section at Sta. 858 facing upstream, showing longitudinal open crack along centerline of canal for about 30 sections. Hairline crack also about 4 inches above ...
  	Citation × Citation Citation Abstract Copy Title: "J" Canal lined section at Sta. 858 facing upstream Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1741-R2 - Klamath Project. "J" Canal lined section at Sta. 858 facing upstream, showing longitudinal open crack along centerline of canal for about 30 sections. Hairline crack also about 4 inches above bottom of slope on right side only. Concrete otherwise in excellent condition, surface intact, plain joints not marked showing slight spalling; October 19, 1948; Photo by H. F. Tolley Title: "J" Canal lined section at Sta. 858 facing upstream Author: United States. Bureau of Reclamation, Tolley, H.F. Year: 1948, 2007, 2005 KP-1741-R2 - Klamath Project. "J" Canal lined section at Sta. 858 facing upstream, showing longitudinal open crack along centerline of canal for about 30 sections. Hairline crack also about 4 inches above bottom of slope on right side only. Concrete otherwise in excellent condition, surface intact, plain joints not marked showing slight spalling; October 19, 1948; Photo by H. F. Tolley Close