Archived decisions
Annex B
Detailed Method Statement
For the Dredge of the area around the Warsash Maritime Academy Jetty.
Winter 2009/2010
Applicant and holder of the consent
Mr Toby Fletcher.
Description of proposed works
Proposals are to dredge to a depth of -1.5m CD within the area bounded by these four coordinates:-
1. 50o 50'.959N 01o 18.437'W
2. 50o 50'.958N 01o 18.427'W
3. 50o 50'.939N 01o 18.440'W
4. 50o 50'.940N 01o 18.419'W
This dredge area equates to an operational water area around the pontoon of 10m east, 5m north and 5m west from the pontoon edge.
As the area has not been dredged before it can be classed as a capital dredge under the
MFA's description of dredge types. The work will be carried out by ML Dredging who will
utilise a barge mounted backhoe dredger.
Method Statement
Working from an area on the perimeter of the dredged area, which is out of the main
navigational channel, the barge mounted backhoe dredger will load the dredged material into a self propelled hopper barge for off-site disposal.
Positioning of the barge will be by GPS and level control maintained by a Prolec
Digmaster electronic system. Dredging will be conducted in concert with tides and will need to be conducted during winter months (i.e. November - April) because of the associated disruption caused by the dismantling of the pontoon and jetty walkway
required to allow access to dredging plant, as well as to avoid unnecessary disruption to the navigational safety of the main river.
Due to the small scale nature of the dredge operation it is intended that the dredging
contractor, ML UK Limited, will fit this work in around other more substantial dredges on the River over this period. Due to this it is not possible to give an exact start and finish date, but works will be completed between November 2009 and Easter 2010 (April), and notification will be given to the Harbour Master of intended dates and activities when known.
The disposal vessel transporting material to the licensed disposal grounds will exhibit the required marks and lights to avoid collisions at sea. Such vessels will be in regular communications with the River Hamble Harbour Master.