Proceeding pursuant to CPLR article 78 (initiated in this Court pursuant to Public Service Law § 128) to review two determinations of respondent Public Service Commission *1025which, among other things, granted the request of respondents Champlain Hudson Power Express, Inc. and Champlain Hudson Power Express Properties, Inc. for a certificate of environmental compatibility and public need.
In 2010, respondents Champlain Hudson Power Express, Inc. and Champlain Hudson Power Express Properties, Inc. (hereinafter collectively referred to as the applicants) filed an application for a Public Service Law article 7 certificate of environmental compatibility and public need (hereinafter EC&PN) to construct, operate and maintain a power transmission cable running approximately 332 miles from a hydroelectric power facility in Canada to Queens County. Shortly thereafter, the applicants advised the Secretary of respondent Public Service Commission (hereinafter the Commission) that they and certain governmental and private entities intended to enter into confidential settlement negotiations. Said settlement negotiations were conducted over the course of 16 months among 30 participating parties representing diverse interests, including petitioners.
In February 2012, the applicants, along with several of the parties involved in the negotiations, filed a joint proposal settling the disputed issues in the case. Although petitioners and other parties opposed the joint proposal, the assigned Administrative Law Judges issued a recommendation that the Commission adopt most of its terms and grant the applicants’ EC&PN. Petitioners and other parties thereafter formally opposed the Administrative Law Judges’ recommended decision. Ultimately, the Commission concluded that the applicants’ proposal met the required statutory findings of Public Service Law § 126 and granted the EC&PN on April 18, 2013.
On May 21, 2013, petitioners filed a petition for rehearing with the Secretary of the Commission. Finding that petitioners failed to timely file their petition and otherwise failed to establish good cause for their delay (see Public Service Law §§ 22, 128 [1]; 16 NYCRR 3.7 [a]), the Commission issued a decision denying rehearing. At the request of the applicants and its own staff, the Commission also undertook to address the merits of petitioners’ request for rehearing and determined that, had the petition been timely filed, rehearing would have been denied in any event as there was no showing of error of law or fact or new circumstances warranting a different determination (see 16 NYCRR 3.7 [b]). Petitioners then commenced this proceeding in this Court pursuant to Public Service Law § 128 to annul the Commission’s determination as well as the granting of the applicants’ EC&PN.
*1026Initially, the filing of a petition for rehearing is required prior to the commencement of a proceeding in this Court, as evinced by the plain language of Public Service Law § 128 (1), which provides that “[a]ny party aggrieved by any order issued on an application for a certificate may apply for a rehearing under [Public Service Law § 22] within [30] days after issuance of the order and thereafter obtain judicial review of such order in a proceeding as provided in this section. . . . Such proceeding shall be initiated by the filing of a petition in such court within [30] days after the issuance of a final order by the [Commission upon the application for rehearing” (see Public Service Law § 129; Matter of Powerline Coalition v New York State Pub. Serv. Commn., 244 AD2d 98, 103 [1998], appeal dismissed 92 NY2d 919 [1998]). Thus, only after a petition for rehearing has been timely filed does this Court have jurisdiction pursuant to Public Service Law § 128 (1) to review the merits of the Commission’s underlying determination as it relates to the issuance of the EC&PN (see Matter of Powerline Coalition v New York State Pub. Serv. Commn., 244 AD2d at 103).
As referenced within Public Service Law § 128 (1), Public Service Law § 22 allows any interested person or corporation to apply for a rehearing within 30 days after service of an order issued by the Commission “unless the [Commission for good cause shown shall otherwise direct” (accord Matter of MCI Telecom. Corp. v Public Serv. Commn. of State of N.Y., 231 AD2d 284, 289-290 [1997]). Determining what constitutes “good cause” under Public Service Law § 22 is within the discretion of the Commission and, as such, its decision to deny the petition for rehearing must not be disturbed absent an abuse of that discretion (see id. at 290; Matter of Gross v State of N.Y. Pub. Serv. Commn., 195 AD2d 866, 867 [1993], lv denied 82 NY2d 660 [1993]; Matter of Columbia Gas of N.Y. v Public Serv. Commn. of State of N.Y., 118 AD2d 305, 308 [1986]).
Here, the Commission issued its initial order granting the applicants’ request for an EC&PN on April 18, 2013. Because the 30th day following the issuance of the order fell on a Saturday, by operation of law the filing deadline was pushed to the following Monday, May 20, 2013 (see General Construction Law § 25-a [1]). Late in the afternoon of May 20, petitioners’ counsel sent the petition for rehearing to a third-party commercial vendor service, Registered Post (hereinafter RPost), to be forwarded to the Secretary of the Commission as well as the numerous other parties in the proceeding. Less than one minute later, petitioners’ counsel received an automated acknowledgment of receipt from RPost stating: “Acknowledgment: Your message has been *1027sent. Rpost will send a Registered Receipt record within two hours as your proof of delivery, content, and official time.” Without having received such official notice, however, counsel was informed by RPost the following day that the message was never delivered due to the high number of recipients. Consequently, petitioners’ petition for rehearing was not deemed filed until May 21, 2013.
Aware of the foregoing circumstances, the Commission determined that, although it had the authority to grant an extension upon a showing of good cause, petitioners’ account of why the petition was late did not amount to such a showing. In our view, the Commission abused its discretion by not excusing for “good cause” the one day delay in the filing of the petition for rehearing. The focus here is on counsel’s use of a commercial electronic mail service, RPost, to assure contemporaneous service upon the Commission and more than 100 parties. Counsel timely initiated service through RPost and received a misleading acknowledgment advising that the message had been sent. Unbeknownst to counsel, RPost withheld delivery to ensure, as the Commission noted, that the email was not “impermissible ‘spam.’ ” While certainly counsel should have ensured that he received the registered receipt verifying that the petition was filed or taken immediate steps to effect service upon the Commission directly, this is, at most, an example of “law office failure” that may readily be and should have been excused (CPLR 2005). Clearly, the minimal delay in no way compromised an expeditious resolution of the case, which had been under review for four years. Moreover, since the Commission fully reviewed the merits of the petition for rehearing at the request of all participants and denied the petition by finding that petitioners failed to demonstrate an error of law or fact or any new circumstances that warranted a different determination (see 16 NYCRR 3.7 [b]), this Court has jurisdiction to address the merits of the order granting the certificate (see Public Service Law §§ 22, 128, 129).*
We begin by recognizing that, as parties to the proceedings at the agency level, petitioners have standing (see Matter of *1028Keyspan Energy Servs. v Public Serv. Commn. of State of N.Y., 295 AD2d 859, 861 [2002]). The criteria for authorizing the construction and operation of a major utility transmission facility are set forth in Public Service Law § 126. Under this statute, the Commission may not grant a certificate approving an electric transmission project unless it finds and determines (1) the need for the facility, (2) whether the facility will achieve the minimum adverse environmental impacts, (3) whether the facility will be located underground and comport with the state’s long-range plan to expand the electric power grid, (4) that there has been conformance with applicable state and local laws and regulations, and (5) that the facility promotes the public interest, convenience and necessity (see Public Service Law § 126 [1] [a]-[d], [f], [g]). This project involves the placement of a high voltage, direct current transmission line extending from the Canadian border to a converter station in Queens and, from there, a high voltage, alternating current transmission line to the Rainey Substation. The line will be placed underwater in Lake Champlain and the Hudson River and underground in the upland segments.
In their petition for a rehearing, petitioners mainly reiterated that the Commission failed to adequately assess the economic risk of the project to the detriment of the ratepayers, as well as the project’s adverse environmental risks, particularly to endangered species, including the atlantic sturgeon. As such, petitioners did not sufficiently establish that there was an error of law or fact or new circumstances and, therefore, rehearing was properly denied (see 16 NYCRR 3.7 [b]). Turning to the merits of the order granting the EC&PN (see Public Service Law § 128 [1]), we are unpersuaded by petitioners’ contentions that there is not substantial evidence in the record to support the Commission’s determination.
Although Public Service Law § 126 does not require the Commission to determine whether the project is economically feasible, the record confirms that the Commission directly addressed petitioners’ economic risk concerns as part of its needs assessment. Importantly, an applicant is only authorized to recover the project costs through wholesale power transactions and not through rates charged to the consumer. In fact, certificate condition No. 15 (b) prohibits the facility from directly receiving cost-of-service rates. Moreover, the Commission reasonably discounted petitioners’ concern that consumers would be required to indirectly subsidize the project should wholesale buyers pay above-market prices. The Commission pointed out that buyers would be discouraged from entering into such agree-*1029merits for the Commission is authorized to reject the overpayments. Moreover, whether the project is economically feasible depends on future gas price forecasts subject to dramatic change that no one can definitively predict, which is a risk that the project investors must assume. From a nonmonetary perspective, there are three uncontested aspects of the project that validate the Commission’s findings of need and public interest. The project will increase transmission capacity to meet New York City’s heavy needs, the use of a hydropower resource will enhance fuel diversity and reduce harmful emissions resulting from New York City’s use of oil- and gas-based electricity sources, and these characteristics promote the 2009 State Energy Plan and New York City’s PlaNYC goals. The record also demonstrates that the Commission seriously assessed the probable environmental impacts of the project and determined that the facility minimized any adverse environmental impact.
Petitioners contend that the Commission failed to adequately consider the potential harm to aquatic species, including the endangered shortnose and atlantic sturgeon, posed by the placement of cables underwater. The plan requires the underwater cables to be buried at least six feet beneath the lake/river bottom, except in areas of utility crossings and hard rock. In these areas, the cable will be covered by concrete mats. The specific risks emanate from the use of the concrete mats as well as magnetic and electromagnetic field impact. The record supports the Commission’s determination that any risk has been minimized by the placement of the cable route utilizing existing habitat information designed to avoid significant coastal fish and wildlife habitat areas designated by the Department of State Csee 19 NYCRR part 602) and the exclusion zones identified by the parties in the joint proposal. There is also expert record evidence supporting the Commission’s conclusion that the magnetic fields’ impact on sturgeon and other aquatic species would be minimal. Further, we agree with the Commission’s observation that the July 5, 2011 letter from the Army Corps of Engineers addressing the cable route under Lake Champlain and the Hudson River was a preliminary assessment. Moreover, the certificate is conditioned on the applicants’ procurement of a construction permit from the Army Corps of Engineers, which has jurisdiction over these navigable waterways, prior to commencing construction.
Finally, petitioners contend that the Commission violated the “public trust doctrine” by approving that part of the cable route under Stony Point State Historic Park and Rockland Lake State Park. We first note that petitioners failed to preserve this issue *1030for review by omitting the contention from their rehearing petition (see Public Service Law §§ 128, 129). In any event, the certificate requires the applicants to obtain approval for overland placement of the cable directly from the owners of such property in accordance with state law. Through its approval, the Commission did not grant the applicant permission to occupy state park land. Given the above, we conclude that the record contains substantial evidence to support the Commission’s determinations (see Public Service Law § 128 [2] [b]).
Stein, J.P, McCarthy and Egan Jr., JJ, concur.We note that the procedure for judicial review is outlined in Public Service Law § 128 (1). The statute provides, as relevant here, that a party aggrieved by an order granting a certificate must first file a petition for a rehearing. Once a final order is issued on the rehearing application, that party may seek judicial review of the underlying order granting the certificate. What triggers judicial review is the issuance of a final order on the rehearing petition, not whether the rehearing petition is granted or denied. As set forth above, we have confirmed the Commissioner’s determination that petitioners did not demonstrate a need for a rehearing.