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| Hennepin Canal State Park posted Today's Throwback Thursday picture shows the downstream side of the Marshall Gate at Lock 11. Taken in August of 1953 John Schlegle: What a great photo for Hennepin Canal History buffs. (1) The man's photo against the Marshall Gate easily shows the Canal's 7 foot water level. (2) The lower right corner shows the Marshall gate's relief chamber and above it (upper left hand), shows the Marshall gate's relief control mechanism. When the mechanism is open, water pressure is lost thus lowering the Marshall gate. When the mechanism is closed, water pressure is maintained, thus raising the Marshall gate. The Army Corps of Engineers developed the Marshall gate for the Hennepin Canal and was used on 14 of it's 33 locks. (3) If you look behind the ladder, you will see a brace holding the Marshall gate in the closed position. This is needed because there is no water pressure to support the Marshall gate. |
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| Dennis Nolan posted Lock 11 report... I didn't fish here... just wanted some place shady to sit and eat my lunch. There is more water coming over the dam but it still looks low. Off the bank by the campground, you can look in the water and see tons of sunfish on beds... they are practically on top of each other! I also saw a water snake. Moving on. Lloyd Scott Hardin shared |
Note that it is not pin connected, it has rivet gusset plates.
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| 2014 photo by GS via BridgeHunter "South profile, looking upstream to Lock #11" |
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