"Earl of Warwich, Duke of Cornwall, Marquies of Anglesea, Sir Reginald P.
Smithers III Esq. LLC, STP. " wrote in message
...
RG wrote:
How the heck to they keep the boat ramps or the marinas available with
100 ft. drop?


In the case of ramps, you grade and pour concrete to the water's edge
when the reservoir is on the way down. When the reservoir is on the way
back up, you have a fully functional ramp. In extreme cases, a temporary
cofferdam is built to allow construction/extension of the ramp.

In the case of marinas, they all float. Everything floats. Slips,
ship's store, restaurant, fuel dock, everything. The floating marina is
tethered to the ground by cables that are attached to large winches on
the floating docks and large anchors at the bottom of the reservoir. As
the reservoir rises and falls, the cables are adjusted with the winches.
In extreme cases, the marina may need to be relocated to deeper water.
In that case, everything is moved laterally and then re-secured to the
bottom. It's done that way every day in the western reservoirs and
lakes. No big deal.

It is if you are the one moving the docks and marinas.


Last trip to Oroville, all the houseboats were tethered way out. There was
23' under me at my slip in the marina. Lake is supposed to go down another
140'. Berryessa built probably the nicest boat ramps anywhere when the lake
was being constructed. 8 lane pave ramps. Lake filled about 3 years
earlier than expected. If you mess up and roll off the end of the ramp, you
will probably be 300' underwater. at full pool. Oroville has all the paved
ramps out of water, and there are two low water ramps. Gravel ramps.
Actually nice ramps.