Friday, August 8,2014
Had pancakes and bacon for breakfast, took a shower, and
prepared for a short cruise day of 10 miles and 7 locks to Lakeville. The
Liftlock at Peterborough is a 65 ft lock constructed of two bathtubs that each
weigh 1300 tons. Boats sail in on both the top tub and the bottom tub and a 5
ft diameter tube supports the load. The upper tub is filled with water 8 feet
deep and the lower with water 7 feet deep. The difference in weight makes the
lock work, the extra foot of water beard down on the tube and valve assembly,
when the valve is opened the water is pushed from the upper tub through the
valve and raises the lower tub. When the locking cycle has been completed the gate
on the lower tub is opened and the extra foot of water flows out the boats are
lowered an extra foot by the water flow. When the gate is lowered on the upper
tub a foot of water flows in and raises the boats an additional foot. Built in
1904 it was considered an engineering marvel of its day.
Thanks to Al for a great restaurant recommendation for
Cassis Bistro, Tom and I had wonderful rack of lamb, Jeannie had the pork
tenderloin, and Carol scallops. Really enjoyed the meal in this cozy little
restaurant.
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| Approaching the 65' Peterborough Lift Lock |
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| Locking the gate in place |
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| The lift Cylinder |
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| A boat locking down as we move up |
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| A view from the top 65 feet above the water |
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| The upper gate being lowered for our departure |
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| Rack of Lamb |
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| Tom, Jeannie, Carol and Dennis |
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