ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

More documents

Recommendations

Info

Bardolino Development Environmental Statement Activity / Source of Potential Impact Possible Environmental Effects Prevention, Control & Mitigation Measures Significance Rating (refer Table 5.3 for key) 2. Installation and Commissioning of Pipelines, Umbilical, Manifold and Valve Skid 2.1 Installation of pipelines and umbilical 2.2 Physical presence of pipelines, umbilical, manifold and valve skid 2.3 Physical presence of mattress protection around the manifold, tree and valve skid • Laying the pipelines and umbilical on the seabed would physically disturb the seabed sediments and cover part of the benthic community. • Trenching both trenches will result in a temporary deterioration in water quality during and after the use of the trenching plough. • Laying the pipelines and umbilical on the seabed would physically disturb the seabed sediments and cover part of the benthic community. • Until the pipeline becomes buried, it could present a snagging risk for bottom-towed fishing gear. • Placement of mattresses on the seabed would physically disturb the seabed sediments and cover part of the benthic community. • Approximately 130 mattresses would be required to stabilize the two transition zones at either end of the pipeline. These would cover at total seabed area of approximately 2,340 m 2 • The area of seabed affected by the trenching and burial of the pipelines and the umbilical would be limited to one trench of width 6.2 m and a second trench of approximately 2 m width, resulting in a total affected area of 0.016 km 2 . • Other users of the sea, including commercial fishermen, would be consulted about the proposed pipeline and umbilical routes during the detailed planning stage. • The area of seabed affected by the trenching and burial of the pipelines and the umbilical would be limited to one trench of width 6.2 m and a second trench of approximately 2 m width, resulting in a total affected area of 0.016 km 2 . • Other users of the sea, including commercial fishermen, would be consulted about the proposed pipeline route during the detailed planning stage. • Covering the pipelines by backfilling and/or rock dumping will reduce any potential snagging risk for bottom-towed fishing gear. • The area of seabed affected would be approximately 2,340 m 2 • Mattresses would be designed to minimise the risk of snagging from bottom-towed fishing gear. Moderate – see Section 6 • Disturbance to benthic communities would be localised to a very small area of approximately 0.016 km 2 along the pipeline and umbilical routes. • The benthic communities found along the pipeline and umbilical routes are widely distributed over large areas of central North Sea; there are no unique or protected species along the routes. • Suspended sediments from trenching and ploughing would settle rapidly and be dispersed, the deterioration in water quality would be temporary and localised. Moderate – see Section 6 • Disturbance to benthic communities would be localised to a very small area, of approximately 0.016 km 2 along the pipeline and umbilical routes. • Clean sediments which are disturbed will be quickly recolonised by natural fauna, from adjacent, undisturbed sites. • Inconvenience to other users of the sea would be localised and temporary. Fishing effort in the area is low. Shipping activity in the area is moderate. • No potentially sensitive habitats protected under Annex I of the EU Habitats Directive, have been identified at the Bardolino location or along the pipeline route corridor. Page 5-10 April 2008 Minor • The mattresses would have a footprint of approximately 2,340 m 2 on the seabed. • Clean sediments which are disturbed will be quickly recolonised by natural fauna, from adjacent, undisturbed sites. • The benthic community is typical of that found over large areas of this part of the central North Sea; no unique or protected species are present.
Bardolino Development Environmental Statement Activity / Source of Potential Impact Possible Environmental Effects Prevention, Control & Mitigation Measures Significance Rating (refer Table 5.3 for key) 2. Installation and Commissioning of Pipelines, Umbilical, Manifold and Valve Skid 2.4 Noise from piling operations during installation of manifold and valve skid 2.5 Physical presence of installation and commissioning vessels • The underwater noise generated during piling operations to install the manifold and valve skid will have the potential for the temporary disturbance of marine mammals and fish in the vicinity. Piling noise could cause temporary behavioural changes in or result in temporary effects on hearing. • The presence of the DP installation and commissioning vessels moving slowly along the pipeline route may cause interference to other users of the sea, including commercial fishing boats. • Shell will follow its piling procedure which has been discussed and agreed with the JNCC. A Marine Mammal Observer will be used to ensure that the area is clear of marine mammals before piling commences and a soft start will be used. Piling will only take place in daylight hours. • The main piling operation, which is likely to last approximately 24 hours in two phases of approximately 12 hours each, will be carefully planned and managed to minimise effects on marine mammals. • Other users of the sea would be consulted about the proposed operations during the detailed planning stage. • The proposed programme and pipeline and umbilical routes would be notified to sea users in “Notices to Mariners”. • The pipeline laying and umbilical laying programme would be carefully planned. In the field, the programme of moving the installation vessels along the route would be carefully managed and coordinated so that it was completed as quickly and efficiently as possible. In support of this, “interface document(s)” would be set up between the contractors and Shell, stipulating roles and responsibilities of each party. • A dedicated guard vessel would be on location throughout the pipelaying and umbilical operations to ensure that all traffic was aware of the presence of the pipelaying and umbilical laying vessels. Vessels other than those involved in the operation would not be permitted to enter the safety zone. Moderate – see Section 6 • The densities of marine mammals in the period of the proposed installation operations are relatively low. • Modelling indicates that only animals within a few kilometres of the piling operations would be likely to be exposed to noise levels that might result in temporary hearing change. • Shell will follow piling procedures agreed with JNCC (Appendix 4) April 2008 Page 5-11 Minor • The pipe-laying activities would be limited to a period of about 6 weeks. • Inconvenience to other users of the sea would be very localised and temporary. The value of fisheries in the area is “low”, and the effect of a temporary loss of access to a small proportion of this area as the pipe laying and umbilical laying spread moves along the route would therefore be negligible. • The level of commercial shipping in the area is moderate.
Page 1 and 2:
ENVIRONMENTAL STATEMENT BARDOLINO D
Page 3 and 4:
Bardolino Development Environmental
Page 5 and 6:
Page 7 and 8:
Page 9 and 10:
Page 11 and 12:
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60: Bardolino Development Environmental
Page 109: Bardolino Development Environmental
Page 161 and 162:
Page 163 and 164:
Page 165 and 166:
Page 167 and 168:
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
13 th March 2008 Dear Sir or Madam,
Page 183 and 184:
To: Paul Wood Shell U.K Limited, Se
Page 193 and 194:
Page 195 and 196:
What risks to marine mammals do pil
Page 197 and 198:
Noise propagation modelling. Noise
Page 199 and 200:
If, for any reason, piling operatio
Page 201 and 202:
APPPENDIX 1 MARINE MAMMAL RECORDING
show all

ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?