Castle Wind Offshore

Castle Wind has initiated development of a 1,000 MW commercial scale offshore wind farm off the coast of Pt. Estero, California with a grid connection in Morro Bay.

Project Overview

Castle Wind Offshore (CWO) will consist of approximately 100 floating offshore wind systems (FOWS) that will harvest the vast offshore wind resources providing lasting economic and environmental benefits for California’s communities.

Each FOWS is moored to the ocean floor using conventional properly sized, vertical load, drag imbedded, or torpedo anchors, a technology that requires no piling and is well suited for deep and variable seabed conditions. The installation is completely reversible, meaning no permanent infrastructure is left on the sea bed upon decommissioning and performed with minimal acoustic disturbances. Individual FOWS are electrically interconnected with inter-array cables to form an offshore wind farm.

Proposed Project Location

Substation Connection at Morro Bay

Floating Offshore Wind 101

California has adopted aggressive Renewable Portfolio Standard (RPS) goals to achieve 100% emissions-free energy by 2045. Offshore wind is part of the solution to meet this target.


NREL’s Offshore Wind Resource assessment shows that California has up to 15 GW of offshore wind capacity potentially available (Musial et al. 2016).

Offshore wind could provide up to 8 GW of a valued diversity component to California’s supply portfolio, which would double existing dispatchable renewable energy resources.

Unfortunately, the availability of out-of-state renewable generation is limited by transmission constraints, but offshore wind in California also provides system benefits that would alleviate some transmission constraints.

Currently, the state’s electricity generation mix is approximately 25% renewable, 10% nuclear, and 10% hydroelectric, or about 45% zero-carbon.

Market Values

Reaching the 2045 zero emissions goal as laid out in SB 100 — will require a wide range of changes, including reducing reliance on natural gas in the power sector. However, we cannot fully remove our dependence on gas power plants until we have replaced all the energy needed with renewable.

To achieve a 100% zero-carbon electricity system, affordable, zero-carbon and long-duration dispatchable resources are necessary.

Project Timeline

April 2019

Local and regional stakeholders meet with the DoD to try to further identify potential wind energy areas near the Central Coast that are compatible with military testing and training operations

January 2019

Castle Wind submits nomination for the Morro Bay Call Area in response to BOEM’s Call.

Nov 29, 2018

Castle Wind signs a Community Benefits Agreement with the City of Morro Bay.

Oct 19, 2018

BOEM published the Call for Information and Nominations.

Sep 17, 2018

BOEM holds second Intergovernmental Task Force meeting.

Oct 6, 2018

Castle Wind signs a Mutual Benefits Agreement with two local commercial fishermen’s organizations

June 2018

Castle Wind works closely with the DoD on resolving military conflicts

April 15, 2018

Castle Wind submits Grid Interconnection Request to CAISO.

Mar 30, 2018

EnBW and Trident Winds form joint venture, Castle Wind LLC, for the development, construction and operation of the project.

May 2017

Navy publishes map that shows Central California having conflicts with Department of Defense (DoD) missions.

Oct 13, 2016

BOEM & the California Energy Commission (CEC) hold the first Intergovernmental Task Force meeting and announce the competitive leasing process auction, initiates data collection to identify Wind Energy Areas.

Sep 19, 2016

BOEM receives 13 comments from various stakeholders and an Expression of a Competitive interest.

Aug 20, 2016

BOEM publishes Request For Interest (RFI) in the Federal Register, soliciting expressions of interest and comments.

May 12, 2016

Governor Jerry Brown requests BOEM to form an Intergovernmental Task Force.

Jan 14, 2016

Trident Winds submits an Unsolicited Lease Request to the Bureau of Ocean Energy Management (BOEM).