This information has been posted to provide equal access for all stakeholders to information about the Sheffield-Highgate Export Interface or SHEI. This information resources is intended to facilitate compliance by VELCO with FERC Standards of Conduct.

Following the addition of the Kingdom Community Wind plant, the Sheffield-Highgate Export Interface (SHEI) was created to monitor system flows in relation to system capacity in real-time. The SHEI is an area of Vermont’s electric grid in the northern tier of the state. Generation resources inside that interface are limited in real time to ensure that system capacity is not exceeded in the event of a potential future transmission outage. The practical effect of the SHEI is that, from time to time, generation resources in the northern tier are required to curtail their output due to the lack of capacity to export power. Utilities, clean energy advocates, regulators, and other stakeholders are currently discussing ways that the SHEI limitations can be addressed to reduce or eliminate curtailments of generation located within the interface.


12/11/2019Materials: SHEI, VELCO-Highgate Power, December 11, 2019 (redacted)
12/10/2019Materials: SHEI, Highview Power-VELCO, December 10, 2019
5/10/2018VELCO SHEI cost estimates
5/8/2018VELCO Response to VEC questions, 5/8/2018
4/18/2018VELCO responses to informal information requests, 4/18/2018
1/30/2018VELCO SHEI cost estimating methodology
1/24/2018Materials: SHEI, GMP, 1/24/2018
1/24/2018Materials: SHEI, BED/VPPSA, 1/24/2018
1/11/2018GMP slides, PUC public forum, 1/11/2018
1/10/2018VELCO SHEI presentation, PUC forum, 1/11/2018
12/5/2017VELCO SHEI Study Final Report, 12/5/2017
11/2/2017Memo: VELCO to GMP, 11/2/2017
10/18/2017Materials: SHEI analysis final results, 10/18/2017
9/1/2017SHEI Study Preliminary Results Presentation, 9/1/2017
8/24/2017SHEI study update 1, 8/24/2017
7/28/2017SHEI Options Analysis RFP Summary, 7/28/2017
7/12/2017Materials: VELCO SHEI preso as shown, 7/12/2017
7/12/2017Materials: VELCO SHEI white paper (draft), 7/12/2017
6/5/2017Materials: SHEI, Presume/VELCO to Smith/GMP, 6/5/2017
5/30/2017Materials: SHEI, Smith/GMP to Presume/VELCO, 5/30/17
5/26/2017Materials: SHEI, Smith/GMP to Presume/VELCO, 5/26/17
5/18/2017Materials: SHEI limit, VELCO-GMP, May 18, 2017 (Redacted)
5/8/2017Materials: SHEI, Bombardier/GMP to Dunn/VELCO, 5/8/17