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Page Title:
Table 3. Required DPIP Information for Hopper and Pipeline Dredges |
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 ERDC TN-DOER-I6
March 2001
Table 3
Required DPIP Information for Hopper and Pipeline Dredges
Information Types
Hopper Dredge
Pipeline Dredge
Dredge computation
Vessel displacement
Cutterhead position
procedures
Hopper material volume
Ullage table
Material recovery
Cutterhead depth
Dredge production
Pumping water
Minimum pumping effort
Dredge dimensions
Dragpipe lengths and inside pipe diameter
Cutterhead and inside pipe diameter
Offset distance from DGPS antenna to center
Offset distance from DGPS antenna to the
line of each draghead
center line of the cutterhead
Distances from fore and aft draft sensors:
Slurry density and slurry velocity sensor
locations
Horizontal and vertical distances from the
keel and between each draft sensor
Vertical distances to the hopper level
sensors
Distances from aft draft sensor to aft
perpendicular and midship section
Distances of fore draft sensor to fore
perpendicular and midship section
Draft and hopper sensor offsets
Dimensioned
Overall dredge
Overall dredge, including hull and decks,
drawings
sensor locations, cutter basket diameter,
Hopper, including hopper length, depth, and
distance between spuds, and suction
width, with hopper level sensors referenced to
ladder length(s)
overall dimensions
Typical mid-ship cross section
Quality control
Sensor calibration checks
Sensor calibration checks
methods
Data quality checks
Data quality checks
Quality assurance tests and checks
Quality assurance tests and checks
Contractor-provided
Brand name
Brand name
computer hardware
Specifications
Specifications
and software
Data reporting
Proposed revisions
Proposed revisions
interface
1
Sensors
Brand name
Brand name
Description of sensor operation and accuracy
Description of sensor operation and
according to manufacturer specifications
accuracy according to manufacturer
specifications
Certificates of calibration and/or manufacturer
Certificates of calibration and/or
certificates of compliance for draft, slurry
manufacturer certificates of compliance
density and velocity, hopper level, water
for slurry density and velocity, and
depth, and draghead depth sensors
cutterhead depth sensors
1
Note: Sensor manuals do not constitute a submittal of sensor descriptions and calibration information.
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