UFC 4-213-02
19 June 2003
Table 9 Norfolk Naval Shipyard Drydock No. 7
Date Completed
Suitable for Docking
Foundation
Construction Material
1919
N/A
Earth
Concrete
Closure
Caisson, steel (rectangular box type).
Dewatering Pumps
Three 54", 1,250 hp, 330,000 gpm. (Drydock No. 4
pumphouse). Time to dewater: 15 min
Drainage Pumps
Two 12", 200 hp, 10,000 gpm. (Drydock No. 4 pumphouse).
Through caisson. Time to flood: 30 min
Captstans
Total 4: 2 at head of drydock (one used by Drydock #6 and
One used by Drydock #4), 30 fpm at 30K; 1 each side of
Entrance (one used by Drydock #6 and one used by
Drydock #4), 2 south side, 30 fpm at 30K
Portal Crane Maximum Capacities and Heights
Hook
5 ft beyond dock
Max height above coping with hook at dock
centerline
centerline
Main
60 lg tons
109' 10"
Auxiliary
5 lg tons
152' 0", 64' 0" min radius
Ship and Industrial Services Furnished at Dock
Electrical
Volts
Amp
Ac, 3 Ph, 60 Hz
460
400
Turtleback 7-4 south side at
400 amps
Fresh water__________None
Saltwater __________ 12" mains, 3,200 gpm at 150 psi, four 4" outlets each side
Fire Protection ________Same as saltwater
Compressed Air______ None
Steam________ ______ None
Sanitary Sewer________None
Note: Drydocks #6 and #7 are presently not certified. Drydock #6 and #7 will be filled in by
2004
22
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