LIHI Certificate #67 - Stillwater Project, Maine

Stillwater Project, LIHI #67
項目名稱 Stillwater
理海證書編號 67
LIHI 證書期限 2020 年 6 月 1 日 – 2030 年 5 月 31 日（可選擇延長至 2033 年 5 月 31 日）
擁有者 Black Bear Hydro Partners, LLC，布魯克菲爾德再生能源集團的子公司
狀態 緬因州
地點 Located at river mile 2.4 on the Stillwater Branch of the Penobscot River in Old Town, Maine.
裝置容量 Total: 4.179 MW

發電站 A: 1.929 MW

Powerhouse B: 2.25 MW
平均年發電量 Total: 21,153 MWh

Powerhouse A: 9,764 MWh

Powerhouse B: 11,389 MWh
設施類型 徑流
聯邦能源監管委員會 不。 P-2712 issued in 1998, expires 03/31/2048

The Stillwater Project is located on the Stillwater Branch of the Penobscot River in the town of Stillwater in Penobscot County, Maine. The project is located at a former logging and milling site, near the City of Old Town. The site was developed into an operating hydroelectric facility in 1902 by the Orono Pulp and Paper Company. A second 發電站 (now Powerhouse A) was constructed on the south side of the 壩 in 1932, and by 1942, the original powerhouse was abandoned, with the remains still visible on the southeast portion of the dam. Powerhouse B was constructed in 2013. The new downstream 魚道 facility and 鰻梯 began operations in 2014 and 2016, respectively.

The Penobscot River basin is New England’s second largest river system with a drainage area of 8,570 square miles. The basin includes the East and West Branches of the Penobscot River, the Piscataquis River, the Sebec River, the Pleasant River, the Mattawamkeag River, the Passadumkeag River, the Stillwater Branch and the main stem of the Penobscot River. The project is one mile upstream of the Orono Project (LIHI #66) and several miles downstream of the Gilman Falls 壩 （部分 Milford Project, LIHI #113). With removal of the Veazie Dam in November 2013, there are no longer any dams on the Penobscot River downstream of the Orono Project which discharges about 800 feet upstream of the confluence of the Stillwater Branch and mainstem Penobscot River. Removal of the Veazie and Great Works dams was a key feature of the nationally recognized restoration of the Penobscot River.

The Stillwater project is a component of the Penobscot River Restoration Agreement. The overall intent of the Agreement is to provide enhancements to the Penobscot River’s environmental resources, and lower and minimize the influence of the Owner’s hydroelectric projects on those resources while maintaining the levels of renewable hydropower generation from the river. The restoration effort is one of the largest river restoration projects in our nation’s history. In an unprecedented collaboration, a diverse group of stakeholders worked together to restore 11 species of sea-run fish to the Penobscot River, while maintaining energy production.

The Stillwater Project consists of a main concrete 重力壩, about 1,720 feet long, consisting of 13 sections of various heights. Powerhouse A contains four turbine-generator units with a total capacity of 1.929 MW. Powerhouse B contains three turbine-generator units with a total capacity of 2.25 MW. The Stillwater Project has an upstream eel passage channel in the west channel of the 0.6-mile-long bypassed reach at Powerhouse B.

該項目運營於 徑流 mode and impounds a 191-acre reservoir. The project provides a minimum flow of 70 cfs in the east channel and 1-2 cfs in the west channel. These flows promote bypass reach habitat for migratory and resident species and to enhance upstream eel passage. This flow regime was developed as part of the Settlement Agreement with consultation from the parties involved including Maine Department of Environmental Protection and the Penobscot Indian Nation.

Waters within the project reach are designated Class B, suited for fish propagation and survival, as well as primary contact recreation. The Stillwater Branch of the Penobscot River is not listed for any impairments. The project owner conducted water quality monitoring following the construction of Powerhouse B which indicated that project operations are not adversely impacting water quality in the river reach.

浪漫的 species present in the Penobscot River include alewife, Atlantic salmon, American shad, sea lamprey and American eel. Historically, the Penobscot River supported larger runs of American shad, blueback herring, Atlantic sturgeon, shortnose sturgeon, rainbow smelt, tomcod, and striped bass.

There is no upstream passage for 溯河洄游魚類 since fish collected at the Orono fish lift are trapped and trucked to a location upstream on the mainstem Penobscot Rive. This is because it was determined to be more beneficial for overall fish restoration of the river basin to concentrate the upstream passage in the Penobscot River mainstem.

The Project does have upstream eel passage via a permanent, flow-through concrete channel which is approximately 6 ft wide and 36 ft long with a bristle-brush floor and provides a 1.5-cfs conveyance flow seasonally. It is located at the small bedrock island about mid-river of the 溢洪道, not far from Powerhouse B. The original eel ladder at Powerhouse A was removed when the current one was installed. This upstream eel passage ladder is operated at a minimum from June 1 to August 31 annually.

The Powerhouse A downstream fish bypass facility is located at the left side of the intake (looking downstream) between the forebay wall and 1-inch clear space trashracks and consists of a low-level entrance and a surface entrance both of which flow into a 2.83-foot-wide bypass 水槽 that discharges into the tailwater through a 36-inch-diameter conduit pipe. Subject to suitable river conditions, the Powerhouse A fish bypass is operated from April 1 to December 31 annually, with a total combined flow of 70 cfs. From April 1 to August 15, the flow is provided entirely through the surface entrance. From August 15 to November 15, the flow is balanced with a 40/30 cfs split between the surface entrance and low-level entrance to enhance downstream eel passage. The flow then reverts back to surface entrance flow only from November 15 to December 31 (or ice-in of the headpond).

Powerhouse B also has1-inch clear space angled trashracks to minimize fish 夾帶, and a downstream fish passage facility consisting of a combination of an opening in the 閃光板 in the forebay near the trashracks (for 2 weeks during the downstream Atlantic salmon smolt migration) and a 4-foot-wide fish bypass opening in the forebay wall. A 4-foot square downstream eel passage facility is installed at the base of the trashracks. Both fish bypasses discharge to a 瀑布水潭 that empties into a flume which runs along the west side of the powerhouse to the tailrace. Subject to suitable river conditions, the Powerhouse B fish bypass is operated from April 1 to December 31 annually with a total combined flow of 70 cfs. From April 1 to August 15, the flow is provided entirely through the surface entrance. From August 15 to November 15, the flow is balanced with a 40/30 cfs split between the surface entrance and low-level entrance to enhance downstream eel passage; operation of the fish bypass then reverts back to surface entrance flow only from November 15 to December 31 (or ice-in of the headpond). The double-regulated unit nearest the downstream fish passage facility at Powerhouse B is operated as first on and last off to provide attraction to the downstream fish passage.

The project lands consist of 4.7 acres. Lands under project ownership are limited to those housing project facilities, with no control of nearby shoreline. No lands of significant ecological value exist in the limited project boundary.

Threatened or endangered species potentially present in the project vicinity include Atlantic salmon, yellow lampmussel, brook floater, tidewater mucket, Northern long-eared bat, little brown bat, eastern small-footed bat, big brown bat, red bat, hoary bat, silver-haired bat, tri-colored bat, and several rare plant species. Ongoing efforts to restore river connectivity for the listed aquatic species have yet to confirm the effectiveness of the passage facilities at the project. The facilities are not likely to adversely impact these species, but effectiveness of passage is still under review. The mussel species are not expected to be impacted by normal run-of-river operations. Similarly, the bat species are not likely to be impacted as limited shoreline management activities occur. The project has committed to adhering to the US Fish and Wildlife Service 4(d) rule concerning bat roosting site protection should any construction or tree-cutting occur at the site. Consultation with the Maine Natural Areas Program (MNAP) identified the presence of several state plant Species of Special Concern, in the project area. The species has been previously observed in the area and led to the development of a Sensitive Plant Protection Plan. The plan has helped to preserve critical habitat for the species and MNAP has stated it has no concerns related to project impacts on the species.

與緬因州歷史保護委員會的協商得出結論，該計畫區域內不存在任何歷史、考古或文化資源。如果在該地區發現任何潛在資源，必須諮詢國家歷史保護辦公室和部落歷史保護辦公室。

Recreational resources at the project include a canoe portage trail. 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： 設施所有者應向 LIHI 提供一份機構信函副本，其中記錄了機構可能為鰻魚上游通道和/或下游通道製定的數值性能標準 洄游性 標準發布後 60 天內，對影響斯蒂爾沃特計畫的佩諾布斯科特河流域的物種進行審查。

條件2： 如果本計畫需要進行額外的上游魚類通道研究，則應在適用的合規聲明中向 LIHI 提供實施計劃和時間表、研究結果以及機構和 PIN 對其的評論。如果進行研究，LIHI 保留根據研究結果和對上游通道有效性的評估修改此條件的權利。

條件3： 在年度合規聲明中，設施所有者應通知 LIHI 已實施的行動，這些行動已得到各機構和 PIN 的同意，旨在解決鰻魚和美洲鰻的下游通道問題：

一個）   在為解決 FERC 2020 年 3 月 6 日信函中確定的三個問題而舉行的會議結束時，設施所有者應提供最終協議的摘要。這應包括向 FERC 提交的解決這些問題的文件副本、實施計劃和時間表、研究結果以及機構和 PIN 對此的評論。如果業主不同意進行所有要求的修改，則應提供這些決定的理由。
b)   如果進行研究或修改，LIHI 保留根據研究結果和對下游通道有效性的評估修改此條件的權利。

條件4： 在年度合規聲明中，設施所有者應通知 LIHI 已實施的措施（根據各機構和 PIN 的同意），以解決大西洋鮭魚下游通道問題：

一個）   對《生物學意見》制定的當前大西洋鮭魚下游通道性能標準進行的任何更改，或在 2023 年截止日期之前根據《瀕危物種法》進行正式諮詢。也應提供作為正式磋商一部分所採取的行動的情況。
b)   如果在 LIHI 認證期限內，無法在 NMFS 制定的現有或任何新時間範圍內滿足當前或新的效能標準，LIHI 保留修改、暫停或撤銷憑證的權利。
c)   如果在 LIHI 證書到期之前，設施所有者收到 NMFS 的同意，認為下游大西洋鮭魚的現行或修訂數值性能標準已得到滿足，從而確認下游通行安全有效，則設施所有者可以要求 LIHI 考慮延長認證期限，以滿足《受威脅和瀕危物種標準》下的 PLUS 要求。

2024: No material changes or compliance issues were identified.  The project remains in compliance based on the annual review.  For Conditions 1, 2, and 3, the project reported no changes.  For Condition 4, project reported For Condition 4, the project reported that the planned Atlantic salmon smolt downstream passage study was postponed until at least 2025 due to ongoing Maine DOT bridge construction upstream.  Due to the delay, the project continued to operate in the spring of 2024 in accordance with the adaptive management measures contained in the Biological Opinion regarding spill during smolt outmigration.

2023: No material changes or compliance issues were identified.  The project remains in compliance based on the annual review.  For Conditions 1, 3 and 4 the project reported no changes.  For Condition 2, the project submitted an upstream internal efficiency study of the upstream eel passage facility conducted in 2022.

2022: No material changes or compliance issues were identified.  The project remains in compliance based on the annual review.  For Conditions 1 and 4 the project reported no changes.  For Condition 2, the project submitted a plan to conduct an upstream juvenile eel PIT tag efficiency study in 2022.  For Condition 3, the project submitted results of the 2016 downstream eel passage study reanalysis.  

2021: 目前證書的年度報告尚未生效。

認證歷史

2022 年 1 月 1 日： 根據 2022 年 1 月 1 日發布的 LIHI 第二版認證手冊第 2.05 版，LIHI 證書期限已延長。

2021 年 4 月 26 日： The decision to recertify the Stillwater Project became final after the close of the appeals period on April 17, 2021 with no valid appeals filed. The Certification term is from June 1, 2020 through May 31, 2025.

2021年3月18日： The Low Impact Hydropower Institute (LIHI) has preliminarily approved recertification of the Stillwater Project for a new 5-year terms of Low Impact Certification. 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 with “Stillwater Project” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 1167 Massachusetts Ave, Arlington MA 02476. All requests will be posted to the website. The applicant will have an opportunity to respond and any response will also be posted. 請求必須在 2021 年 4 月 17 日美國東部時間下午 5 點之前收到。 完整的申請和審核員報告如下。如果沒有收到上訴請求且決定成為最終決定，則該計畫的認證期限為 2020 年 6 月 1 日至 2025 年 5 月 31 日。

2020年12月1日： The Low Impact Hydropower Institute has received a complete application for Low Impact recertification of the Stillwater Project. The complete application can be found below. LIHI is seeking public comment on this application. 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 “Stillwater Project Comments” in the subject line, or by mail addressed to the Low Impact Hydropower Institute, 1167 Massachusetts Avenue, Arlington MA 02476. 必須在 2021 年 1 月 30 日美國東部時間下午 5 點或之前收到評論，才會被考慮。 所有評論都將發佈到網站上，申請人將有機會回應。任何回覆也會公佈。

February 12, 2017:  The 30-day appeal period ended with no appeals received. Therefore, the Stillwater Project LIHI Certification is final and the effective certification date for the Stillwater Project is June 1, 2015 for a five (5) year term, which will expire on June 1, 2020.

January 18, 2017: On January 13, 2017, LIHI Executive Director Shannon Ames, using authority delegated from the LIHI Governing Board, has issued a Preliminary Certification Decision that the Stillwater Hydroelectric Project (FERC No. P-2712) satisfies the LIHI Certification Criteria.  This certification decision is based on authority delegated from the LIHI Governing Board.  The certification includes four facility-specific conditions, as follows:

  • 2018 年條件滿足。 條件 1.  The Owner shall notify LIHI within 30 days of receipt of USFWS certification of the downstream anadromous 魚道 and of the up and downstream eel passage facilities as required by the Lower Penobscot River Multiparty Settlement Agreement. This certification requires affirmation that a) the facilities were designed and installed as prescribed, b) the facilities are ready for routine operation as evidenced by approved Operating Manuals and electronic data collection systems and c) one year of testing and any required “fine tuning” has been completed. If such USFWS certification is not received by the end of 2017, the Owner shall provide LIHI documentation as to why the certification has not been received and the plan and schedule to remedy deficiencies identified by USFWS preventing such certification.
  • 2018 年條件滿足。條件2。  If the requirement for re-initiation of studies of downstream passage of juvenile alosine species occurs within this LIHI certification period, the Owner shall notify LIHI within 60 days of receipt of such study re-initiation. This notification shall include the study schedule including the expected report issuance date. A copy of the final report, along with agency comment as to whether or not the testing results prove that safe downstream passage has been demonstrated, shall be provided to LIHI within 60 days of issuance of the final report.
  • 條件3。  The Owner shall notify LIHI within 60 days of receipt of USFWS, NMFS and MDMR acknowledgement that the standards specified in the Biological Opinion for safe downstream passage of Atlantic salmon have been met. Currently, effectiveness testing should be completed by 2018 based on the three-year testing requirement, unless advancement to the third level flow enhancement sequence is found to be necessary. Should this occur, the Owner shall notify LIHI in the annual compliance report as to the new date by which such continuing testing to meet passage standards is expected to be completed.
  • Condition satisfied 2019. 條件 4。  The Owner shall provide LIHI a summary of the results of the 2016 quantitative downstream effectiveness study for American eel, along with comments received from USFWS, NMFS and MDMR as to whether or not the testing results prove that safe downstream passage for American eel has been demonstrated. Also, the Owner shall provide a summary of the annual American eel upstream passage results, along with confirmation that any changes to the passage facilities recommended by the resource agencies have been implemented or are scheduled for implementation. The noted upstream and downstream passage results shall be provided within 60 days of report finalization.

As provided for in Section 4.2.5 of the LIHI 2nd Edition Handbook, the Preliminary Certification Decision, along with the Application Reviewer’s report and (if prepared) report of the Executive Director, will be posted on the Institute’s Web page for 30 days.  Notice of the posting will be provided to all individuals or organizations that commented on the initial Application Package. Any Commenter may submit a letter to the Executive Director requesting an appeal within the 30-day period, which begins on January 20, 2017 and ends on February 20, 2017.  The appeal request must state specific reasons why the hydropower facility should have failed one or more criteria.  Only individuals or organizations that commented on the initial Application Package may file an appeal.  Further information about the LIHI appeal process is available in the LIHI Handbook, available at https://lowimpacthydro.org/certification-program-html/. If no appeal is requested within the 30-day period, the Executive Director will issue LIHI Certification for the facility and post a notification of certification on the Institute’s website.  Once final, the effective certification date for the Stillwater Project is June 1, 2015 for a five (5) year term, which will expire on June 1, 2020.

2015年12月11日： The Low Impact Hydropower Institute has received a complete application for a new term of Low Impact Certification for the Stillwater Hydroelectric project.  The application materials can be found in the Files section below.

該申請的公眾意見徵詢期於 2016 年 2 月 12 日結束。

2011年1月28日： The Stillwater Hydroelectric Project has been certified as low impact for a five year term, effective June 1, 2010 and expiring June 1, 2015.

2010年8月2日： 此認證申請的公眾意見徵詢期已經結束。

2010年6月2日： Black Bear Hydro Partners has submitted an application for the certification of the Stillwater Project. Public comment period will be open for 60 days.

認證文件

2020 年重新認證

2015 年重新認證

2012 Certification – Stillwater B (formerly LIHI #110)

2010 Certification – Stillwater A

關鍵文件