Category:Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER

Media in category "Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER"

The following 82 files are in this category, out of 82 total.

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  GENERAL VIEW IN COFFERDAM, Photograph No. 670. October 10, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-50.tif 4,885 × 3,913; 18.23 MB
  
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  GENERAL VIEW LOCKS AND DAM, NOW IN FULL OPERATION Photograph No. 4075. October 25, 1938 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, HAER ILL,60-ALT,3-61.tif 4,965 × 3,967; 18.79 MB
  
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  GENERAL VIEW OF ROLLER GATES AND PIER Photograph No. 1587. October 6, 1936 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-55.tif 4,858 × 3,932; 18.22 MB
  
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  45 FT. LOCK GATES - 2 FT. SIDEWALK HEIGHT - GENERAL DRAWING Drawing No. M-L 26 21-17, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, HAER ILL,60-ALT,3-67.tif 4,942 × 3,910; 18.43 MB
  
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  AERIAL VIEW OF LOCK AND DAM, LOOKING SOUTHEAST Photocopy of photograph, ca. 1980. Original print is on file at St. Louis District Office, U.S. Engineer Office, St. Louis, Missouri. HAER ILL,60-ALT,3-1.tif 4,961 × 3,966; 18.77 MB
  
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  AERIAL VIEW Photograph No. 1588. November 4, 1936 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-56.tif 5,019 × 4,026; 19.27 MB
  
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  AERIAL VIEW Photograph No. 2913. August 20, 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-59.tif 4,976 × 4,015; 19.06 MB
  
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  CENTRAL CONTROL STATION - ELEVATIONS Drawing No. M-L 26 70-1. January 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-79.tif 4,899 × 3,937; 18.4 MB
  
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  CENTRAL CONTROL STATION - FLOOR PLANS Drawing No. M-L 26 70-12. January 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-80.tif 4,903 × 3,892; 18.2 MB
  
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  CENTRAL CONTROL STATION - SECTIONS Drawing No. M-L 70-13. January 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-81.tif 4,933 × 3,917; 18.43 MB
  
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  CURING WITH HIGH PRESSURE HOSE Photograph No. 2194. April 19, 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-57.tif 5,008 × 3,994; 19.08 MB
  
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  DAM - GENERAL PLAN Drawing No. M-L 26 40-1. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-70.tif 4,903 × 3,906; 18.27 MB
  
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  DAM - INDEX Drawing No. M-L 26 0-2, August 1946 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-68.tif 4,905 × 3,924; 18.36 MB
  
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  DAM - MASONRY DETAILS - TAINTER GATE SILLS and APRON Drawing No. M-L 26 40-10. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison HAER ILL,60-ALT,3-73.tif 4,884 × 3,910; 18.21 MB
  
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  DAM - POWER, CONTROL AND LIGHTING SYSTEM - INDEX Drawing No. M-L 26 0-4. January 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-78.tif 4,901 × 3,936; 18.4 MB
  
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  DAM - ROLLER GATE OPERATING MACHINERY - GENERAL ARRANGEMENT Drawing No. M-L 26 54-1. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, HAER ILL,60-ALT,3-76.tif 4,942 × 3,900; 18.38 MB
  
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  DAM - ROLLER GATES - GENERAL ASSEMBLY Drawing No. M-L 26 47-1. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-74.tif 4,893 × 3,910; 18.25 MB
  
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  DAM - SECTION AND ELEVATION OF ROLLER GATE PIER Drawing No. M-L 26 40-3. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-72.tif 4,917 × 3,877; 18.18 MB
  
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  DAM - SECTION AND ELEVATIONS OF TAINTER GATE PIER Drawing No. M-L 26 40-2. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, HAER ILL,60-ALT,3-71.tif 4,910 × 3,892; 18.23 MB
  
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  DAM - SITE MAP Drawing No. M-L 26 10-5. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-69.tif 4,916 × 3,900; 18.29 MB
  
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  DAM - TAINTER GATES - GENERAL DRAWING Drawing No. M-L 26 48-1. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-75.tif 4,904 × 3,904; 18.26 MB
  
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  DETAIL VIEW OF AUXILIARY LOCK INTERIOR, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-22.tif 4,885 × 3,948; 18.4 MB
  
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  DETAIL VIEW OF CENTRAL CONTROL PANEL IN CLOSED POSITION, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-32.tif 4,870 × 3,889; 18.06 MB
  
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  DETAIL VIEW OF CENTRAL CONTROL PANEL IN OPEN POSITION, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-31.tif 4,880 × 3,906; 18.18 MB
  
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  DETAIL VIEW OF CENTRAL CONTROL STATION WITH TAINTER GATE TRUNNION IN FOREGROUND, LOOKING EAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison HAER ILL,60-ALT,3-26.tif 4,966 × 3,971; 18.81 MB
  
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  DETAIL VIEW OF CENTRAL CONTROL STATION, SHOWING UPPER AUXILIARY LOCK MITER GATES IN FOREGROUND AND SERVICE BRIDGE AT FAR RIGHT, LOOKING SOUTHWEST - Upper Mississippi River 9-Foot HAER ILL,60-ALT,3-27.tif 4,904 × 3,923; 18.35 MB
  
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  DETAIL VIEW OF HIGHWAY BRIDGE, SHOWING RAILROAD BRIDGE AND LOCK AND DAM IN BACKGROUND, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam HAER ILL,60-ALT,3-36.tif 4,893 × 3,888; 18.15 MB
  
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  DETAIL VIEW OF HIGHWAY BRIDGE, SHOWING RAILROAD BRIDGE AND LOCK AND DAM IN BACKGROUND, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam HAER ILL,60-ALT,3-37.tif 4,993 × 3,993; 19.02 MB
  
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  DETAIL VIEW OF INTERMEDIATE WALL OF UTILITIES OVERHEAD, LOOKING NORTH (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-33.tif 4,889 × 3,932; 18.34 MB
  
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  DETAIL VIEW OF INTERMEDIATE WALL TAINTER VALVE WELL HOUSING, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, HAER ILL,60-ALT,3-19.tif 4,902 × 3,900; 18.23 MB
  
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  DETAIL VIEW OF LOCKMEN'S SHELTERS AT UPPER END OF INTERMEDIATE WALL, LOOKING SOUTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-20.tif 4,950 × 3,972; 18.75 MB
  
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  DETAIL VIEW OF LOCOMOTIVE CRANE, LOOKING EAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-12.tif 4,885 × 3,935; 18.33 MB
  
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  DETAIL VIEW OF MAIN LOCK LOWER MITER GATE, SHOWING SECTOR ARM AND GATE STRUT, LOOKING SOUTHWEST (DOWNSTREAM). SWING SPAN OF RAILROAD BRIDGE IN OPEN POSITION IS VISIBLE AT REAR. - HAER ILL,60-ALT,3-23.tif 4,880 × 3,912; 18.21 MB
  
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  DETAIL VIEW OF MITER GATE OPERATING MACHINERY, SHOWING GATE STRUT, SECTOR ARM, AND GATE OPERATING MACHINERY WELL, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel HAER ILL,60-ALT,3-18.tif 3,917 × 4,905; 18.33 MB
  
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  DETAIL VIEW OF RAILROAD BRIDGE SWING SPAN IN OPEN POSITION, LOOKING SOUTH (DOWNSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-35.tif 4,893 × 3,910; 18.25 MB
  
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  DETAIL VIEW OF RAILROAD BRIDGE, LOOKING NORTHEAST (UPSTREAM) - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-34.tif 4,998 × 3,993; 19.04 MB
  
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  DETAIL VIEW OF RAISED ROLLER GATE, SHOWING DAMAGED APRON, LOOKING SOUTHWEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-10.tif 4,890 × 3,938; 18.37 MB
  
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  DETAIL VIEW OF ROLLER GATE IN RAISED POSITION, SHOWING DAMAGED APRON. ROLLER GATE OPERATING MACHINERY HOUSE IN BACKGROUND, LOOKING EAST - Upper Mississippi River 9-Foot Channel HAER ILL,60-ALT,3-11.tif 4,906 × 3,933; 18.4 MB
  
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  DETAIL VIEW OF ROLLER GATE OPERATING MACHINERY HOUSE, LOOKING SOUTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-9.tif 4,955 × 3,971; 18.77 MB
  
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  DETAIL VIEW OF ROLLER GATE PIER AND ROLLER GATE OPERATING MACHINERY HOUSE, SHOWING ROLLER GATE, LOOKING EAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, HAER ILL,60-ALT,3-8.tif 3,946 × 4,955; 18.65 MB
  
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  DETAIL VIEW OF STORAGE BUILDING IN STORAGE YARD, LOOKING WEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-39.tif 5,003 × 4,004; 19.11 MB
  
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  DETAIL VIEW OF TAINTER GATE EMERGENCY BULKHEADS IN STORAGE YARD, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-14.tif 4,982 × 3,982; 18.92 MB
  
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  DETAIL VIEW OF TAINTER GATE EMERGENCY BULKHEADS IN STORAGE YARD, LOOKING NORTHWEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-13.tif 4,977 × 3,993; 18.96 MB
  
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  DETAIL VIEW OF TAINTER GATE PIER AND TAINTER GATE NO. 2, LOOKING NORTHEAST (UPSTREAM). SERVICE BRIDGE, CENTRAL CONTROL STATION AND UTILITIES OVERHEAD ARE VISIBLE AT REAR. - Upper HAER ILL,60-ALT,3-4.tif 4,896 × 3,902; 18.22 MB
  
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  DETAIL VIEW OF TAINTER GATE PIER AND TAINTER GATE, LOOKING SOUTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-6.tif 4,896 × 3,907; 18.25 MB
  
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  DETAIL VIEW OF TAINTER GATE PIER AND TAINTER GATE, SHOWING TAINTER GATE GAUGES AND SERVICE BRIDGE, LOOKING NORTHWEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam HAER ILL,60-ALT,3-5.tif 3,892 × 4,878; 18.11 MB
  
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  DETAIL VIEW OF TAINTER GATE, SHOWING STREAMLINED SPILLWAY, LOOKING NORTHWEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-7.tif 4,907 × 3,948; 18.48 MB
  
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  DETAIL VIEW OF TILE GAUGE IN INTERMEDIATE LOCK WALL, LOOKING NORTHEAST. NOTE STEEL WALL ARMOR EMBEDDED IN CONCRETE. - Upper Mississippi River 9-Foot Channel Project, Lock and Dam HAER ILL,60-ALT,3-24.tif 3,916 × 4,939; 18.45 MB
  
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  DETAIL VIEW OF UPPER GUIDE WALL, LOOKING NORTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-16.tif 3,970 × 4,963; 18.79 MB
  
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  DETAIL VIEW OF WEST ALTON PUBLIC ACCESS AREA, LOOKING NORTHWEST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-38.tif 4,901 × 3,904; 18.25 MB
  
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  DETAILED INTERIOR VIEW OF CENTRAL CONTROL STATION, LOWER FLOOR, LOOKING NORTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-28.tif 4,996 × 3,982; 18.98 MB
  
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  DETAILED INTERIOR VIEW OF CENTRAL CONTROL STATION, MAIN FLOOR, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-30.tif 4,879 × 3,926; 18.27 MB
  
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  DETAILED INTERIOR VIEW OF CENTRAL CONTROL STATION, MAIN FLOOR, LOOKING SOUTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-29.tif 4,902 × 3,894; 18.21 MB
  
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  DETAILED INTERIOR VIEW OF INTERMEDIATE WALL IN LOCKMAN'S SHELTER, LOOKING SOUTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-21.tif 3,914 × 4,898; 18.29 MB
  
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  LOCK - INDEX Drawing No. M-L 26 0-1, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-62.tif 4,897 × 3,914; 18.28 MB
  
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  LOCKS - GATE OPERATING MACHINERY Drawing No. M-L 26 25-1, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-64.tif 4,952 × 3,948; 18.65 MB
  
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  LOCKS - GENERAL PLAN Drawing No. M-L 26 22-1, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-63.tif 4,920 × 3,914; 18.37 MB
  
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  LOCKS - VALVE OPERATING MACHINERY - ASSEMBLY MAIN LOCK Drawing No. M-L 26 28-1, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison HAER ILL,60-ALT,3-66.tif 4,956 × 3,919; 18.53 MB
  
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  OVERALL OF DAM, EARTH DIKE, AND WEST ALTON PUBLIC ACCESS AREA, LOOKING NORTHEAST (UPSTREAM). - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison HAER ILL,60-ALT,3-15.tif 4,987 × 3,982; 18.94 MB
  
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  OVERALL VIEW OF DAM, LOOKING NORTHEAST - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-3.tif 4,903 × 3,922; 18.34 MB
  
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  OVERALL VIEW OF DAM, LOOKING UPSTREAM. - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-2.tif 4,896 × 3,908; 18.25 MB
  
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  OVERALL VIEW OF ESPLANADE, LOOKING SOUTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-25.tif 4,880 × 3,896; 18.13 MB
  
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  OVERALL VIEW OF MAIN LOCK, LOOKING NORTH - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-17.tif 4,891 × 3,916; 18.27 MB
  
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  POURING CONCRETE PIER NO. 27 Photograph No. 780. November 16, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-51.tif 4,895 × 3,893; 18.18 MB
  
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  TAINTER GATE OPERATING MACHINERY - GENERAL ARRANGEMENT Drawing No. M-L 26 55-1. December 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison HAER ILL,60-ALT,3-77.tif 4,917 × 3,911; 18.34 MB
  
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  TAINTER VALVES - MAIN LOCK - GENERAL DRAWING Drawing No. M-L 26 28-1, October 1933 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-65.tif 4,953 × 3,922; 18.53 MB
  
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  UPSTREAM VIEW FROM COFFERDAM Photograph No. 292. October 17, 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-42.tif 4,890 × 3,939; 18.37 MB
  
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  UPSTREAM VIEW FROM RAILROAD BRIDGE Photograph No. 409. January 3, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-44.tif 4,897 × 3,876; 18.1 MB
  
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  UPSTREAM VIEW SHOWING THE ASSEMBLING OF TAINTER GATE Photograph No. 843. December 16, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County HAER ILL,60-ALT,3-52.tif 4,904 × 3,903; 18.26 MB
  
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  VIEW OF BUILDING FORMS FOR MONOLITHS 9A and 10A. Photograph No. 229. September 14, 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, HAER ILL,60-ALT,3-41.tif 4,885 × 3,910; 18.22 MB
  
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  VIEW OF CENTRAL CONCRETE HOUSE Photograph No. 2830. September 21, 1937 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-58.tif 4,891 × 3,908; 18.23 MB
  
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  VIEW OF EXCURSION STEAMER J. S. AND STEAMER MISSISSIPPI, WITH BARGE, IN MAIN LOCK Photograph No. 3544. June 7, 1938 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam HAER ILL,60-ALT,3-60.tif 4,982 × 3,978; 18.9 MB
  
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  VIEW OF LOCK FROM HIGHWAY BRIDGE Photograph No. 600. August 1, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-47.tif 4,955 × 3,946; 18.65 MB
  
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  VIEW OF LOCK FROM STANDARD-TILTON ELEVATOR Photograph No. 604. August 1, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-48 cut.jpg 4,240 × 2,681; 2.74 MB
  
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  VIEW OF LOCK FROM STANDARD-TILTON ELEVATOR Photograph No. 604. August 1, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-48.tif 4,902 × 3,928; 18.37 MB
  
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  VIEW SHOWING BEGINNING OF LOWER ARM OF COFFERDAM Photograph No. 592. July 16, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-46.tif 4,982 × 4,021; 19.11 MB
  
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  VIEW SHOWING COFFERDAM CONSTRUCTION Photograph No. 60. March 31, 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-40.tif 4,965 × 4,004; 18.96 MB
  
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  VIEW SHOWING PLACEMENT OF CONCRETE WITH BUGGIES Photograph No. 632. August 23, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-49.tif 4,900 × 3,912; 18.28 MB
  
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  VIEW SHOWING PLACEMENT OF RAILROAD BRIDGE PIER PROTECTION - PIER NO. 3 Photograph No. 422. January 11, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, HAER ILL,60-ALT,3-45.tif 5,014 × 3,967; 18.97 MB
  
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  VIEW SHOWING ROLLER GATE ERECTION Photograph No. 1463. September 15, 1936 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-54.tif 5,000 × 3,995; 19.05 MB
  
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  VIEW SHOWING SINKING UPPER GUIDE WALL CRIB Photograph No. 351. November 12, 1934 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-43.tif 4,972 × 3,966; 18.81 MB
  
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  VIEW SHOWING TAINTER GATE ERECTION Photograph No. 855. December 26, 1935 - Upper Mississippi River 9-Foot Channel Project, Lock and Dam 26, Alton, Madison County, IL HAER ILL,60-ALT,3-53.tif 4,896 × 3,912; 18.27 MB