LIHI Certificate #95 – Passumpsic Project, Vermont

LIHI Certificate #95 - Passumpsic Project, Vermont

Nombre del proyecto	Passumpsic
Certificado LIHI No.	95
Plazo del certificado LIHI	February 6, 2017 – February 5, 2027
Dueño	Corporación de energía Green Mountain
Estado	Vermont
Ubicación	Located at river mile 5.5 on the Passumpsic River, a tributary of the Connecticut River, approximately 1.7 miles downstream of the Gage Project.
Capacidad instalada	0.7 MW
Generación media anual	1,998 MWH
Tipo de instalación	De pasada
Comisión Federal de Comercio No.	P-2400 issued in 1994, expires 11/30/2034

The Passumpsic Project is located in northeastern Vermont near St. Johnsbury, in Caledonia County, on the Passumpsic River. It is the second presa on the river and located at river mile 5.5, downstream of several projects including Gage (LIHI #94), Arnold Falls (LIHI #93), y Pierce Mills (LIHI #92). The East Barnet Project (FERC No. 3051) is the first dam on the river. The river is 22.7 miles long and a tributary to the Connecticut River, entering just downstream of Comerford Presa (part of the Fifteen Mile Falls Project, LIHI #39).

The Passumpsic River Project was built in 1905 – 1906 for the St. Johnsbury Electric Company. The central eléctrica was completely destroyed in the flood of 1927. Portions of its foundation and those of its associated power canal remain buried on the other side of the existing canal. The plant was rebuilt in 1929 in the location of the Chase leatherboard mill water wheel, which was also destroyed in the flood. The building behind the powerhouse is the remainder of the former leatherboard mill. The project is owned by Green Mountain Power (GMP), the first energy utility certified as a Corporación B.

The project includes a dam, tableros de flash, headgate, power canal, powerhouse, intake, aliviadero, one vertical shaft turbine, bypassed reach, and subestación.

The concrete presa de gravedad consists of two sections: a south section 122-feet-long with a maximum height of 10-feet, topped with 1-foot-high flashboards; and a north section 126-feet-long with a maximum height of 10-feet, topped with 1-foot-high flashboards. The dam is equipped with a 27-foot-wide headgate structure with two puertas. The power canal conveys flow to the powerhouse via an integral intake with an inclined trashrack. The canal is 19 to 22-feet-wide and 87-feet-long. There is also a sluice and a 24-foot-long overflow spillway. The powerhouse contains one vertical shaft turbine and generator with an installed capacity of 0.7 MW, as well as appurtenant equipment. A substation is located adjacent to the power canal. The downstream paso de peces facility consists of a sluiceway in the spillway adjacent to the canal headworks. The bypassed reach is about 350-feet-long.

El proyecto opera en un de pasada mode and impounds an 18.3-acre reservoir. The project provides an 86-cfs minimum flow into the bypass reach. Portions of this flow are used for aesthetic enhancement and fish passage seasonally. Aesthetic flows are provided from June 1 through October 31 and fish passage flows (9-25 cfs) are provided from April 1 through June 15 and from September 15 through November 15. The flow regime was developed with recommendations from the Vermont Agency of Natural Resources (VANR) and United States Fish and Wildlife Service (USFWS).

Waters within the project reach are designated Class B and impaired for E. coli contamination due to the St. Johnsbury wastewater treatment plant passing combined sewer overflows. VANR has confirmed that the project does not adversely impact water quality and is not the source of river impairments. Class B waters are managed to support aquatic biota, wildlife, and aquatic habitat, public water supply, irrigation, primary contact recreation, and aesthetics.

While the Connecticut Cuenca del río historically hosted naturally occurring Atlantic salmon runs, the species was extirpado from the river system due to the construction of dams. These downstream dams create a barrier to upstream passage at the project. Resident species of the Passumpsic River include brown trout, brook trout, and rainbow trout. Downstream passage is facilitated via a surface bypass canal artificial and a 24-inch-diameter transport pipe with a 9-25 cfs passage flow. Trashracks with 1-inch spacing mitigate the potential for arrastre. The project owner consulted with USFWS and VANR to develop this passage facility.

The project lands consist of 34 acres. The area surrounding the impoundment and project lands are primarily rural residential housing and farmland. No lands of significant ecological value exist in the area and run-of-river operations mitigate the potential for erosion of the shoreline.

Threatened and endangered species potentially within project vicinity include the Northern Long-eared Bat and Garber’s sedge. The primary concern for the listed species is the disruption of critical habitat. Consultation with the VANR concluded that project operations and the construction of the downstream passage facility would not have any negative impact on the listed species.

Cultural resources in the project area include the project infrastructure which is eligible for listing on the Registro Nacional de Lugares Históricos. The project owner submits annual reports to the Vermont Division for Historic Preservation on any activities pertinent to the stewardship of the project’s cultural resources.

Recreational resources at the project include a canoe portage and picnic area. The project owner voluntarily revised the Passumpsic River Canoeing and Recreation Guide and provides guided facility tours. Public access is provided free of charge.

Estado de cumplimiento

El Certificado incluye las siguientes condiciones específicas de la instalación:

Condition closed in 2023. Condition 1: The Owner shall provide LIHI with evidence that FERC has approved the Revised Flow Management Plan (filed by GMP on April 25^th, 2018) within 60 days from the date of issuance of that approval.

Condition closed in 2023. Condición 2: The Owner will provide LIHI with evidence that FERC has approved the Downstream Paso de peces and Operations and Maintenance Plan (filed by GMP on April 25^th, 2018) within 60 days from the date of issuance of that approval. If FERC issues new terms and conditions, the LIHI Certification is subject to amendment to incorporate such terms and conditions.

Condition satisfied in 2018. Condition 3: The Owner shall provide a LIHI with a copy of the final report to FERC demonstrating the completion of the portage pathway improvements within 60 days of filing that report with FERC.

2025: No se identificaron cambios materiales ni problemas de cumplimiento. El proyecto sigue cumpliendo con los requisitos según la revisión anual.

2024: No se identificaron cambios materiales ni problemas de cumplimiento. El proyecto sigue cumpliendo con los requisitos según la revisión anual.

2023: No material changes or compliance issues were identified. The project remains in compliance based on the annual review. Upon review of the FERC docket regarding Conditions 1 and 2, LIHI determined that there had been no requirement for FERC to approve the revised flow management plan or the downstream passage O&M plan, thereby rendering the two conditions no longer applicable and thus closed.

2022: No material changes or compliance issues were identified. The project remains in compliance based on the annual review. Both conditions remain open pending FERC approval of the plans filed in 2018.

2021: There were no reported changes or compliance issues. For Conditions 1 and 2 no FERC issuance was received. The project remains in compliance based on the annual review.

2020: There were no reported changes or compliance issues. For Conditions 1 and 2 no FERC issuance was received. The project remains in compliance based on the annual review.

2019: There were no reported changes or compliance issues. Downstream fish passage and recreation enhancements were completed and reported to FERC in 2018. For Conditions 1 and 2 no FERC issuance was received. The project remains in compliance based on the annual review.

2018: The project reported downstream passage construction was initiated in 2017 with expected completion in 2018 along with lower portage trail enhancements and signage. The project remains in compliance based on the annual review.

2017: La presentación de informes anuales para el Certificado actual aún no ha entrado en vigor.

Historial de certificaciones

1 de enero de 2022: El plazo del Certificado LIHI se ha extendido de acuerdo con la Revisión 2.05 del Manual de Certificación LIHI 2.ª Edición emitido el 1 de enero de 2022. Consulte la tabla de instalaciones anterior para conocer el nuevo plazo.

October 10, 2018: The decision to recertify the Passumpsic Hydroelectric Project is final. No appeals were received during the appeal period which closed on October 6, 2018. The new certification term for the Project is from February 6, 2017 through February 5, 2022.

September 6, 2018: On September 4, 2018, the Low Impact Hydropower Institute (LIHI) preliminarily approved the Passumpsic Hydroelectric Project for a new 5-year term of Low Impact Certification. This decision is preliminary pending the 30-day appeal window. Only those who commented in the initial application during the 60-day comment period are eligible to file an appeal. Such appeal needs to include an explanation as to how the projects do not meet the LIHI criteria. Appeal requests can be submitted by email to comentarios@lowimpacthydro.org with “Passumpsic Hydroelectric Project” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 329 Massachusetts Ave, Suite 2, Lexington, MA 02420. All requests will be posted to the website and the applicant will have an opportunity to respond and any response will also be posted. Requests must be received by 5 pm Eastern time on October 6, 2018. The full application and reviewers report are available below. If no appeal requests are received and the decision becomes final, the new term for certification will be February 6, 2017 – February 5, 2022.

12 de junio de 2018:The Low Impact Hydropower Institute has received a complete application for a new term of Low Impact Certification for the Passumpsic Hydroelectric Project (LIHI # 95). The Project is located on the Passumpsic River in St. Johnsbury, Vermont. LIHI is seeking public comment on this application. Specifically, we are interested in knowing whether you think the Project meets the LIHI Low Impact Certification Criteria, as revised in the 2nd Edition Handbook. Please review the program and criteria in LIHI’s revised Manual y luego revise los materiales de solicitud del Proyecto 2018 publicados a continuación. Los comentarios que estén directamente relacionados con criterios específicos de LIHI (flujos, calidad del agua, paso de peces, etc.) serán de gran ayuda, pero se considerarán todos los comentarios. Los comentarios pueden enviarse al Instituto por correo electrónico a comentarios@lowimpacthydro.org with “Passumpsic Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 329 Massachusetts Avenue, Suite 2, Lexington, MA 02420. Comments must be received at the Institute on or before 5 pm Eastern time on August 11, 2018 Se considerarán todos los comentarios. Se publicarán en el sitio web y el solicitante tendrá la oportunidad de responder. También se publicarán todas las respuestas.

11 de junio de 2018: The Passumpsic Hydroelectric project has been granted another extension of the current certificate term. The new expiration date is November 30, 2018.

November 28, 2017: The Passumpsic Hydroelectric project has been granted another extension of the current certificate term. The new expiration date is March 31, 2018.

December 16, 2016: The Passumpsic Hydroelectric project has been granted an extension of the current certificate term. The new expiration date is August 6, 2017. See extension letter for explanation below.

September 13, 2012: The Passumpsic Project has been certified as low impact for a five year term, effective February 6, 2012 and expiring February 6, 2017.

April 6, 2012: Public comment period on the application has closed.

February 6, 2012: The Central Vermont Public Service Corporation has submitted an application for the certification of the Passumpsic Project. Public comment period has been opened.