LIHI Certificate #108 - Gilman Project, New Hampshire

Gilman Project, LIHI #108
Nombre del proyecto Gilman
Certificado LIHI No. 108
Plazo del certificado LIHI
 4 de diciembre de 2017 – 3 de diciembre de 2027
Dueño Ampersand Gilman Hydro LP
Estado Vermont, New Hampshire
Ubicación Located in the Village of Gilman, VT in the Town of Lunenburg, Essex County, Vermont, and in the Town of Dalton, Coos County, New Hampshire, at river mile 300 on the Connecticut River.
Capacidad instalada 4.85 MW
Generación media anual 25,000 MWh
Tipo de instalación De pasada
Comisión Federal de Comercio No. P-2392 issued in 1994, expires 03/31/2024

The Gilman Project is located in the Village of Gilman, VT in the Town of Lunenburg, Essex County, Vermont, and in the Town of Dalton, Coos County, New Hampshire, on the Connecticut River. The boundary between Vermont and New Hampshire passes through the project such that two generating units are located in New Hampshire, while the other two generating units are located in Vermont. In 1995 and 1996 the Simpson Paper Company, who owned and operated the site to produce paper until 1999, spent millions to refurbish the presa by replacing the existing cuna de madera dam structure with a concrete gravity structure and adding presa de goma crest controls to the new and existing aliviaderos. There are ten hydroelectric projects on the Connecticut River. The project is the ninth most upstream dam located between the Fifteen Miles Falls Project (LIHI #39) and the Canaan Project (LIHI #160).

The project consists of a refurbished concrete dam, 26.5 feet tall and 324.5 feet long spanning the width of the Connecticut River. The dam includes an overflow aliviadero section containing a hydraulically operated puerta de la cresta and repaired existing concrete dam sections have rubber dam crest controls. The rubber dam body on the new dam section is 6.5 feet high and 109.5 feet long. The rubber dam body on the existing dam section is 5.0 feet high and 108.0 feet long.

A power canal leads to an intake structure, and the central eléctrica containing three Turbina Francis generating units and one Kaplan unit with a combined capacity of 4.85 MW.

The powerhouse is located at the northern Vermont end of the dam on the right bank of the Connecticut River and was originally constructed as a ground wood mill. The powerhouse has a substructure of mass concrete with integral water intake draft tubes. The superstructure is of brick construction with steel-frame and timber-frame construction. Project controls and mechanical equipment are located inside the powerhouse.

El proyecto opera en un de pasada mode and impounds a 130-acre reservoir. A minimum flow of 210 cfs is provided from June 1 to October 15 whenever instantaneous inflow to the project is 1,000 cfs or less. This flow regime was developed based on United States Geologic Survey records with consultation from New Hampshire Department of Environmental Services (NHDES) and Vermont Agency of Natural Resources (VANR). The flow regime mitigates low dissolved oxygen levels in the downstream reach and helps maintain adequate fish habitat in the Connecticut River.

Waters within the project reach are designated as water-quality limited due to the potential for low dissolved oxygen levels. Water quality monitoring confirmed that the project meets water quality standards.

Downstream dams create a barrier to upstream paso de peces. The two dams closest downstream of the project do not have upstream passage requirements and resource agencies have not prescribed passage. In 2007, the project owner began consultation with United States Fish and Wildlife Service (USFWS) and Vermont Department of Fish and Wildlife (VDFW) to implement downstream fish passage facilities at their request. Consultation on design occurred from 2009-2011 and the passage facility consisting of a passage slot leading to a piscina de inmersión was implemented in 2012 to assist the Atlantic salmon restoration efforts on the Connecticut River. The restoration efforts were discontinued in 2016 and the downstream passage, though no longer required, is still operated for resident species.

The project lands consist of roughly 1.1 acres. No lands of significant ecological value exist in the project property due to its limited ownership of the shoreline. The north shoreline consists of a paper mill complex and the town of Gilman and the south shoreline is primarily wooded deciduous forest.

Threatened or endangered species potentially present in the project vicinity include the Dwarf wedgemussel, Canada lynx, tricolored bat, Northern long-eared bat, mountain avens, Robbins Cinquefoil, and Boott’s rattlesnake-root. The project owner, in consultation with USFWS, VDFW, and NH Fish and Game Department conducted studies in 2013 to develop a formal drawdown management plan to minimize the project’s effects on the Dwarf wedgemussel. The agencies confirmed that the project is not impacting these listed species.

There are no cultural or historic resources present on facility lands.

Recreational resources at the project include a canoe portage and boat launch. Public access is provided free of charge.

Estado de cumplimiento

El Certificado incluye las siguientes condiciones específicas de la instalación:

Condición satisfecha en 2020. Condición 1: By December 31, 2018, the Owner shall provide LIHI with evidence of compliance with the water quality monitoring and with the other recommendations issued by NHDES in its letter dated April 13, 2018. When available, the Owner shall provide evidence of concurrence from NHDES that the Facility does not negatively impact water quality.

Condition partially satisfied in 2021, only annual reporting is now required. Condición 2: By July 31, 2018, the Owner shall submit the final Drawdown Management Plan to USFWS and LIHI.  When available, the Owner shall provide evidence of concurrence by the agencies on the plan.  In the annual compliance statements to LIHI, the Owner shall provide a summary of activities related to dwarf wedgemussel during the prior year including any takings, agency communication and consultation, issuance of an agency Biological Opinion, and/or changes in operations or facilities that may affect the species.

2024: No material changes or compliance issues were identified. The project remains in compliance based on the annual review.  For condition 2, the project reported no activities related to dwarf wedgemussels.

2023: No material changes or compliance issues were identified. The project remains in compliance based on the annual review.  For condition 2, the project reported no activities related to dwarf wedgemussels.

2022: No material changes or compliance issues were identified. The project remains in compliance based on the annual review.  For condition 2, the project provided an update of activities related to dwarf wedgemussels.  The project filed its final relicensing application with FERC on March 28, 2022.

2021: There were no reported changes or compliance issues. The project remains in compliance based on the annual review. For Condition 2, the project provided agency concurrence on the drawdown plan, thus partially satisfying the condition.

2020: There were no reported changes or compliance issues. The project remains in compliance based on the annual review.  For Condition 1, the project confirmed NHDES concurrence on monitoring results, thus satisfying the condition. For Condition 2, the project reported completion of a water level/flows study conducted for relicensing related to drawdowns.

2019: There were no reported changes or compliance issues. The project remains in compliance based on the annual review.  The project began FERC relicensing with filing of the PAD on 05/30/2019. For Condition 1, the project submitted water quality monitoring results. For Condition 2, the project reported operating under the draft drawdown management plan with agency approval, during an emergency impoundment drawdown.

2018: There were no reported changes or compliance issues. The project remains in compliance based on the annual review.  For Condition 1, the project reported completion of water quality monitoring. For Condition 2, the project reported submitting a draft drawdown management plan for agency review.

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.

June 19, 2018 – The 30-day appeal window for the preliminary recertification decision of the Gilman Hydroelectric Project closed on June 14, 2018 with no appeals to the decision received. The decision is therefore final and the Gilman Hydroelectric Project is recertified for a 5-year term from December 4, 2017 through December 3, 2022.

May 15, 2018 – On May 14, 2018, the Gilman Hydroelectric project has received preliminary approval 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 60-day comment period are eligible to file an appeal. Such appeal needs to include an explanation as to how the project does not meet the LIHI criteria. Appeal requests can be submitted by email to comentarios@lowimpacthydro.org with “Gilman 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 June 14, 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 the Rolfe Canal Project will be September 6, 2017 through September 5, 2022.

February 20, 2018: The Low Impact Hydropower Institute has received a complete application for a new term of Low Impact Certification for the Gilman Hydroelectric Project. LIHI is seeking public comment on this application.  Specifically, we are interested in knowing whether you think the Gilman 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 “Gilman 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 April 21, 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.

October 12, 2017: The Gilman Hydroelectric Project certification term has been extended to March 31, 2018.

28 de mayo de 2013: The Gilman Hydroelectric Project has been certified as low impact for a five year term, effective December 4, 2012 and expiring December 4, 2017.

4 de febrero de 2013: The public comment period on application has closed.

4 de diciembre de 2012: Ampersand Gilman Hydro LP has submitted an application for the certification of its Gilman Hydroelectric Project. The application was posted to the website and the public comment period was opened.

Archivos de certificación

Recertificación 2018

Certificación 2012

Documentos clave