By Katherine J. Hart
The recent case of Voices of the Wetlands v. State Water Resources Control Board (2011) 52 Cal.4th 499, involves the issuance of an NPDES permit by the Central Coast Regional Water Quality Control Board (“Regional Board”) authorizing the Moss Landing Power Plant (then owned by Duke Energy, now owned by Dynegy) to draw cooling water from Moss Landing Harbor and Elkhorn Slough. Plaintiff Voices of the Wetlands challenged the permit raising a number of legal issues, but only the following three issues were addressed by the California Supreme Court:
(1) Did the superior court have jurisdiction to consider the administrative mandamus petition at issue?
(2) Did the trial court improperly order an interlocutory remand after finding insufficient evidence to support the Regional Board’s best technology available (BTA) finding?
(3) Does section 316(b) of the Clean Water Act (CWA) permit a cost-benefit analysis in determining best technology available?
The court left unresolved the issue of whether compensatory mitigation and habitat restoration measures can be a component of BTA.

