| Show POWER PLANT INSIDE DAM unique house near baltimore con strutted ted under water baltimore md aid an absolutely unique power has recently been completed about 15 miles below this city on oil the co river it 4 14 built within a dam and li is entirely under v water ater it Is tile the first 0 of its kind kin dever ever built ard cost much less legg than it would have it if built in any other known knon way the dam la Is feet long 40 feet thick at the base and ai feet high the spillway la is feet long but at only feet of this distance ja ia used for housing the power plant the dam to la of ie enforced concrete the shell ishell being 1 18 inches thick at the bottom and tapering to ton ten inches at the top the apron extends only half way may down from the cron the remaining down stream portion being entirely open and provided with windows b means of which the la Is light el ed the shape of the apron Is such that the water Is thrown throan some little distance away front from the w windows indora the part used by tho the power house is fitted with a false ceiling hung five feet from the inside of the dam so as to protect the apparatus from any yater that might seep through the outer shell of the dam the dam is balt of a fine and rih ridi mixture which was laid very wet met aside from this no precautions were taken to elaml vate nate water the water la Is fed to tile the turbines through steel pipes passing through the upstream spillway shell and dis charged by drift tubes into the base of hp dam dropping into a well sunk some feet below tile the river bed the water passes thence by way of a channel constructed in the river bed out of the dam the intake Is five and one halt half feet below the crest of the gillway so BO that the trash racks are lie clear of drift driftwood woo 1 etc |
