LIHI Certificate #189 - Mattaceunk Project, Maine

Mattaceunk Project

 

項目名稱 Mattaceunk
理海證書編號 189
LIHI 證書期限 March 28, 2022 – March 27, 2032, with option to extend to March 27, 2035
擁有者 Great Lakes Hydro America, LLC（布魯克菲爾德再生能源集團的子公司）
狀態 Maine
地點 River Mile 67 on the mainstem of the Penobscot River
裝置容量 19.2 MW
平均年發電量 123,332 MWh
設施類型 徑流
聯邦能源監管委員會 不。 P-2520, issued in 2021, expires 01/31/2061

The Mattaceunk Project is located on the mainstem of the Penobscot River in the towns of Medway, Woodville, Mattawamkeag, and the unorganized township of Molunkus in Aroostook and Penobscot Counties, Maine. The river is approximately 75 miles long from the confluence of the West and East Branches of the Penobscot River (to form the mainstem) downstream to the 頭 of tide in Bangor, Maine. The Penobscot River overall is 264 miles long, making it the longest river system in Maine. The river drains nearly one third of the state of Maine with a watershed area of 8,670 square miles. The basin has a low population density, is largely forested, and contains many large lakes and multiple tributaries.

這 壩 和 發電站 were originally constructed over a six-year period, from 1937 through 1942, by the Great Northern Paper Company. The project commenced initial commercial operation in 1942. Mattaceunk is now the third project on the mainstem Penobscot River following dam removals undertaken as part of the Lower Penobscot River Multiparty Settlement Agreement, the goal of which was to restore self-sustaining populations of 11 native species of sea-run fish along the Penobscot River in Maine. Other projects on the Penobscot include the Medway, Milford, Millinocket-Dolby， 和 North Twin projects.

The project consists of a dam and integral powerhouse located on the mainstem approximately 7 miles downstream from the confluence of the West and East Branches of the Penobscot River. The dam includes a 658-foot-long, 70-foot-high concrete gravity overflow 溢洪道 and a 114-foot-long roller gate spillway. Additionally, a 10-foot-wide log sluice is controlled by an 8-foot-high vertical slide gate. The powerhouse measures 142-foot-long by 99-foot-wide. The power intake has trashracks that have 1-inch clear bar spacing covering the top 16 feet and 2.63-inch clear bar spacing at lower depths. By March of 2023, the trash racks will have 1-inch clear bar spacing over the entire depth. Two Kaplan and two fixed blade propeller turbine/generating units provide a total combined capacity output of 19.2 MW. A 變電站 is located adjacent to the powerhouse and interconnects to a 9-mile-long, 34.5 kilovolt transmission line.

The project operates in a modified run of river mode and impounds a 1,664-acre reservoir. A year-round 基流 of 1,674 cfs (or inflow, whichever is less) is provided with impoundment fluctuations of 2 feet with 閃光板, and 1 foot without. This flow regime ensures suitable aquatic habitat.

Waters within the project reach are designated Class B, suitable for aquatic biota habitat, drinking water supply after treatment, fishing, agriculture, and recreation in and on the water. Waters within the project reach have historically been impaired due to discharges from former paper mills in Millinocket and East Millinocket. However, water quality monitoring confirmed that project waters attained all designated uses for Class B waters.

Upstream 魚道 at the project is facilitated by a pool and weir design with 36 pools, each with a drop of roughly 2 feet between pools. This 魚道 is typically operated from May 1 through November 10 and allows for species such as American shad, blueback herring, alewife, American eel, and Atlantic salmon to pass upstream of the dam unimpeded. The project is situated in critical habitat for Atlantic salmon. Consultation with the National Marine Fisheries Service has concluded that the project is not likely to jeopardize the continued existence of the Gulf of Maine distinct population segment of Atlantic salmon. A dedicated passage for American eel is currently in the design stages and is slated for installation by September 2023. Downstream fish passage was installed in 1992 and consists of single surface inlets integral with the 1-inch clear bar spacing trashracks. The facility is operated from April 1 to June 15 and from October 17 to December 1 for salmon smolt/kelt passage. Additionally, a buried 42-inch diameter stainless steel pipe is available for passing fish to the tailrace area at a maximum flow capability of 140 cfs. A trapping and monitoring facility is provided at the outlet of the pipe.

The project lands consist of roughly 20 acres. Lands to the north are largely developed areas of municipalities, roads, and industrial sites, including a wastewater treatment plant. Otherwise, most of the project lands encompass the project structures and two small recreation sites. No shoreline lands exist around the impoundment save a small parcel that includes a canoe portage takeout and trail. Vegetation maintenance is conducted around the project and recreation sites.

Threatened or endangered species potentially present in the project vicinity include Atlantic salmon, Canada lynx, Northern long-eared bat, brook floater, tidewater mucket, yellow lampmussel, boreal snaketail, Orono sedge, least bittern, black tern, sedge wren, and common gallinule. No critical habitat exists in the project area for Canada lynx and 徑流 operations with limited impoundment fluctuation minimizes the risk to the other listed species.

The project dam and powerhouse have been determined by the Maine State Historic Preservation Officer to be eligible for listing on the 國家歷史遺跡名錄. Several other sites exist submerged in the impoundment. A Historic Properties Management Plan was developed in February 2022 and governs the protection of the historic sites and ensures coordination between the project and state and tribal historic preservation offices.

Recreational resources at the project include a portage trail around the dam and informational signage associated with it. Adjacent to the project is a town of Medway recreation complex which includes a swimming beach, sports facilities, day use areas, an Americans with Disabilities Act accessible boat ramp, and parking areas. The project also includes a downstream recreation site with angler access and a covered day use area with improvements planned by 2024. Public access is provided free of charge.

合規狀態

此證書包括以下設施特定條件：

條件一： The facility Owner shall provide updates to LIHI in annual compliance statements on the ongoing status of post-licensing activities, including any studies, FERC filings, agency consultations, prescriptions and recommendations, agency comments on study results, implementation schedule changes, and final FERC approvals, as applicable. In particular, LIHI must be kept abreast of the following:

LIHI reserves the right to modify the Certificate or conditions based on progress being made and the outcome of   these items.

Condition 2 (Optional): If, at any time prior to one year before the expiration of the Certificate term, the facility Owner voluntarily completes the design, installation, initial operation, and initial shakedown of upstream and downstream 溯河洄游魚類 passage facilities and protection measures, the facility Owner may request a three-year extension of the LIHI Certificate term.

2024: No material changes or compliance issues were identified. The project remains in compliance based on the annual review.  For Condition 1a, the project reported upstream eel passage to be installed in 2024 and continued nighttime shutdowns and seasonal trash rack overlays installed.  For Condition 1b, the project reported implementation of spill for Atlantic salmon smolts and a 3-year downstream passage study to begin in 2024. For Condition 1d the project filed the final HPMP.  For Condition 2, the project did not report any activity.

2023: No material changes or compliance issues were identified. The project remains in compliance based on the annual review.  For Condition 1a, the project reported filing design drawings for upstream eel passage and completion of installation of 1-inch trash rack overlays for downstream passage and plans to conduct nighttime shutdowns in 2023.  For Condition 1b, the project reported implementation of spill for Atlantic salmon smolts will begin in 2023. For Condition 1c, the project filed the final Species Protection Plan. For Condition 1d the project completed consultation and filed the final HPMP. For Condition 1e, the project filed documentation of recreation enhancement completion.  For Condition 2, the project did not report any activity.

2022: 目前證書的年度報告尚未生效。

認證歷史

July 15, 2022: The decision to certify the Mattaceunk Project became final after the close of the appeals period on July 9, 2022 with no appeals filed. The certification term is March 28, 2022 to March 27, 2032 with an option to extend the term by three years.

2022 年 6 月 9 日： The Low Impact Hydropower Institute (LIHI) has preliminarily approved the Mattaceunk Project for a 10-year term of Low Impact Certification, with an option to extend the term by 3 additional years. This decision is preliminary pending the 30-day appeal window. Only those who commented on 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 Project does not meet the LIHI criteria. Appeal requests can be submitted by email to 評論@lowimpactHydro.org 主題行為“Mattaceunk 計畫”，或郵寄至低影響水力發電研究所，地址為：1167 Massachusetts Ave, Office 407, Arlington, MA 02476。申請人將有機會回應，任何回應也將公佈。 請求必須在 2022 年 7 月 9 日東部時間下午 5 點前收到。 The full application and reviewer’s report are available below. If no appeal requests are received and the decision becomes final, the Certification term for the Project will be March 28, 2022 through March 27, 2032.

March 29, 2022: The Low Impact Hydropower Institute has received a complete application for Low Impact Certification of the Mattaceunk Project. 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 手冊 and then review the Project’s application materials below. Comments that are directly tied to specific LIHI criteria (flows, water quality, fish passage, etc.) will be most helpful, but all comments will be considered. Comments may be submitted to the Institute by e-mail at 評論@lowimpactHydro.org with “Mattaceunk Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 1167 Massachusetts Avenue, Arlington, MA 02476. Comments must be received on or before 5 pm Eastern time on May 28, 2022 to be considered. All comments will be posted to the web site and the applicant will have an opportunity to respond. Any response will also be posted.

認證文件

2022 Certification

關鍵文件