2026 Cluster Study Interconnection Process
The 2026 Cluster Study Request window will be open from Thursday, October 1, 2026, through Sunday, November 15, 2026. Any question or transactions requiring employee assistance must be resolved by close of business on Friday, November 13, 2026.
To support the Cluster Study Application process, Grant PUD has developed several resources and guidance documents. Applications will be reviewed upon submission, and applicants will be contacted if any information or documentation is incomplete.
Application Process
The application fee, study deposit, and deposits in-lieu-of-90% site control (if applicable), and Commercial Readiness Deposit (if applicable) will be invoiced to you and must be received by Grant PUD no later than the end of day on Sunday, November 15th, 2026. Remittance instructions will be included with Grant PUD’s invoice. Applications must be deficiency free prior to the close of the window - early submission is encouraged.
In addition to the online Application, please complete and submit a Vendor Request Form and W-9. These forms are required for Grant PUD to process Application fees, deposits, and refunds (if applicable).
Please refer to the Grant PUD Interconnection Data Requirements and Validation and Grant PUD Interconnection Request Checklist to ensure all applicable documentation and data file formats can be processed.
Contact TxApplications@gcpud.org with any additional questions regarding your Cluster Study Application or the Cluster Study Process.
Submitting Supporting Documentation
All required documents must be uploaded through Grant PUD’s Secure File Transfer Protocol (SFTP) site. Access instructions and a passcode will be provided via email.
Submit the following information to TxApplications@gcpud.org to request the web address and passcode to log onto the SFPT site:
- Legal Name of Entity:
- Project Name:
- Name of Submitter:
- Email of Submitter:
Please note applications and document submittals will not be accepted via email or via postal service.
Notification of acceptance into the Cluster Study will occur no later than the close of business on November 16th, 2026.
Contact Information for authorized signatories will be requested after notification of acceptance into the Cluster Study.
Acceptable Supporting Documentation for Application & Attachments
Grant PUD recognizes that projects seeking interconnection to the transmission system may be at varying stages of development. Accordingly, certain technical information requested in the Interconnection Application , Attachment A and Attachment B may not be available at the time of submission.
For information that is available, Grant PUD will accept alternative forms of supporting technical documentation in lieu of the specific formats requested, provided the submitted information adequately addresses the applicable requirements. If the required data is included in other supporting files, applicants should reference those files and ensure they are uploaded to the SFTP site.
Please refer to the FAQs for additional guidance regarding acceptable documentation and data submittal requirements.
Application Deficiencies
Once all required documents have been received, Grant PUD will review and respond, via email, within 15 business days.
Any incomplete or missing information will be communicated back to the requestor for review and correction.
To be included in the current Cluster Window, all application deficiencies must be resolved by the end of day on November 15, 2026. Late submissions will not be accepted.
Additional Information
Links to Business Practices can be found on the left side of this page.
Sample versions of the Non-Disclosure Agreement and Cluster Study Agreement are provided for reference purposes. Both agreements will be formally executed during the Cluster Engagement Window.
All legal documents will be prepared by Grant PUD and must be executed through a DocuSign process initiated by Grant PUD.