Name: Tetra Tech, Inc.
Address: 4101 Cox Road, Suite 120, Glen Allen, VA 23060, United States
Virginia Electric and Power Company, a wholly owned subsidiary of Dominion Resources, Inc. (Dominion) is proposing the Virginia Offshore Wind Technology Advancement Project (VOWTAP or Project), a 12 megawatt (MW), two turbine offshore wind demonstration project located approximately 24 nautical miles (27 statute miles, 43 kilometers) offshore of the city of Virginia Beach, Virginia (Figure 1). Other offshore Project facilities include a 34.5 kilovolt (kV) Inter-Array Cable that will interconnect the two VOWTAP wind turbine generators (WTGs), and a 34.5 kV Export Cable that will convey electricity from the WTGs to a landfall site located in Virginia Beach, Virginia. This technical appendix presents the acoustic modeling methodologies, as applied, to estimate the expected underwater noise levels generated during construction and operation of the proposed Project, including pile driving of wind turbine foundations, which is expected to generate the highest underwater sound levels.
Dominion Resources, Inc.
~43 km offshore of Virginia Beach, Virginia
To estimate the expected underwater noise levels during construction and operation of a proposed offshore wind project
Underwater sound levels produced during Project construction are not expected to be of sufficient duration to cause long term effects on marine mammals, sea turtles and fisheries within the Project Area. Temporary avoidance behavior from Project related noise and vessel activity is likely to occur during the construction period.
Tetra Tech (2013). Underwater Acoustic Modeling Report - Virginia Offshore Wind Technology Advancement Project (VOWTAP). Report by Tetra Tech Inc. pp 47. https://tethys.pnnl.gov/publications/underwater-acoustic-modeling-report-virginia-offshore-wind-technology-advancement