LIHI Certificate #32 - Newton Falls Project, New York
The Newton Falls Project consists of two developments (Upper Newton Falls and Lower Newton Falls), located on the Oswegatchie River in the Town of Clifton, St. Lawrence County, New York. The original timber crib dams at the project site were constructed in 1895 and replaced by the current dams in the late 1920s. Both dams were built for power production and various aspects of the dams have been rehabilitated several times since their construction. There are seventeen dams on the Oswegatchie River. The Cranberry Lake Hydroelectric Project is located upstream of the project and several projects are located downstream of the project. These include the Oswegatchie Project (LIHI #161).
The project includes two developments:
- Upper Newton Falls: The concrete gravity dam is approximately 600 feet long with a maximum height of 50 feet. Components of the dam are a south non-overflow section, a post tension anchored uncontrolled concrete ogee gravity section, a four-bay flood gate structure with slide gates (also post-tension anchored), an intake, and a north non-overflow section. The intake is a reinforced concrete gravity structure measuring approximately 36 feet by 45 feet with a maximum height of 25 feet. The penstock is a 9-foot-diameter, 1,200-foot-long steel-banded wood-stave penstock with timber cradles on timber mud sills. The surge tank is a riveted steel differential tank structure located upstream of the penstock trifurcation into the powerhouse. The powerhouse consists of a reinforced concrete substructure and brick superstructure and contains three Leffel Type "Z" turbines with a total installed capacity of 1.54 MW.
- Lower Newton Falls: The project dam is a 350-foot-long, 24-foot-high concrete gravity dam topped with flashboards, a 9-acre reservoir with a gross storage of 115 acre-feet, a 300-foot bypass reach, and a one-unit powerhouse. Components of the dam, from left to right, facing downstream, are a left embankment/corewall section, an ogee spillway with flashboards, a forebay wall, an integral powerhouse/intake, and a concrete retaining wall retaining the access/parking lot fill. The spillway is a concrete gravity ogee section with an overall length of 120 feet, and a maximum height of about 24 feet (28 feet to the top of the non-overflow ends of the structure). The left embankment is a soil backfilled corewall structure with a length of about 125 feet. The forebay wall is located to the right of the spillway and serves as a training wall for the intake. It is about 80 feet long with a top elevation of 1,376.5 feet. A three-foot square sluice gate exists in the forebay wall, controlled by a lift gate with a manual operator at the crest. A concrete gravity retaining wall that retains the driveway to the powerhouse exists to the right of the intake and serves as a training wall for the intake. The wall is about 88 feet long. The intake is integral with the upstream face of the powerhouse. The intake structure is a reinforced concrete structure approximately 20 feet wide by 15 feet high. The intake has three bays controlled by three vertical screw stem lift gates. There are no penstocks or flumes at the project. The powerhouse and intake are integral structures. The powerhouse contains a single Leffel Type "Z" turbine with an installed capacity of 0.68 MW.
|Project Name||Newton Falls|
|LIHI Certificate No.||32|
|LIHI Certificate Term||November 2, 2017 - November 1, 2022|
|Owner||Erie Boulevard Hydropower, L.P.|
|Location||Located between river mile 99.1 and 99.6 on the Oswegatchie River in the town of Clifton, St. Lawrence County, New York.|
|Installed Capacity||Total: 2.22 MW Upper Newton Falls: 1.54 MW Lower Newton Falls: 0.68 MW|
|Average Annual Generation||8,982 MWh|
|Facility Type||Upper Newton: Peaking and/or load following mode Lower Newton: Run-of-river|
|FERC No.||P-7000 issued 2003, expires 2044|
The Upper Newton Falls development operates in a peaking/load-following mode and provides a year-round minimum flow of 20 cfs via the downstream fish passage outlet. The Lower Newton Falls development is operated in a run-of-river mode and provides a minimum flow of 100 cfs. This minimum flow is achieved either by passing flows over the spillway or through the turbine when sufficient flows allow. This flow regime was developed with US Fish and Wildlife Service (USFWS) and NY State Department of Environmental Conservation (NYSDEC) based on demonstration flow studies conducted during the last relicensing period.
Waters within the upper project reach are designated as Class A(t), suitable for drinking and culinary purposes, recreation, and fish propagation/ survival. The (t) classification also indicates that a trout population may also be supported. Downstream of the project, waters are designated as Class C. Class C waters are suitable for recreation and suitable for fish propagation and survival.
Several natural falls in the project area have historically precluded access for migratory fish species. Fishery surveys dating back as far as 1931 have noted that no anadromous or catadromous fish species exist in the project area. Downstream resident fish passage is provided at Upper Newton Falls by a steel bulkhead notched to release 20 cfs of fish passage flow, which leads to a plunge pool at the base of the spillway. Passage is also provided at the Lower Newton Falls development via a notch at a sluice gate which also releases a 20 cfs fish passage flow which leads to an existing pool. This structure and passage flows were developed with consultation from USFWS and NYSDEC to provide effective fish passage. Resident species include largemouth and smallmouth bass, pike, sucker, minnow species, and brook, brown, and rainbow trout.
The project lands consist of less than 2 acres. Lands under project ownership are limited and are overseen by the project’s shoreline erosion monitoring plan. The plan focuses on the Upper Newton Falls development and contains provisions for preservation of an area adjacent to the river with potential for archaeological resources. An impoundment monitoring system ensures impoundment fluctuations are limited to 0.1 foot every minute, minimizing potential for shoreline erosion.
Threatened or endangered species potentially present in the project vicinity include the Northern long-eared bat, bald eagle, and northern reed grass. The primary concern for the bat species pertains to tree-clearing. The project provides a woodland buffer, ensuring proper protection for the species. NYSDEC was consulted in regard to potential impacts on bald eagle individuals and the agency reported that it was unlikely that project operations would have any impact on the species or its nesting habitat. Bald eagle populations are ‘doing very well’ in New York.
The only cultural resources in the project area could potentially be found in the area adjacent to the Upper Newton Falls development mentioned above. This stretch of land has the potential for archaeological resources and must remain under careful observation. Otherwise, the State Historic Preservation Office has no concerns of potential impact to historic structures or buildings in the project vicinity due to project operation.
Recreational resources at the project include a car-top boat launch, canoe put-in/take-out area, and parking area. Public access is provided free of charge.
July 6, 2018 – The 30-day appeal window for the preliminary certification decision of the Newton Falls Hydroelectric Project closed on July 5, 2018 with no appeals to the decision received. The decision is therefore final and the Newton Falls Hydroelectric Project is recertified for a term from November 2, 2017 through November 1, 2022.
June 5, 2018: The Low Impact Hydropower Institute (LIHI) preliminarily approved the Newton Falls Hydroelectric Project for a new 5-year term of Low Impact Certification with the following condition:
- Condition satisfied 2018. Condition 1:The Owner shall install, and develop a flow rating for a staff gage or monument in the bypassed reach of the lower development and shall provide the rating to the resource agencies and FERC as provided for in FERC’s Article 404 letter of November 4, 2008. Confirmation of completion shall be filed with LIHI by December 31, 2018. LIHI may suspend or revoke Certification if this requirement is not met in full by that date unless it can be demonstrated that any additional delays are due to factors beyond the Owner’s control.
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 project does not meet the LIHI criteria. Appeal requests can be submitted by email to firstname.lastname@example.org with “Newton Falls 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 July 5, 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 Newton Falls Project will be November 2, 2017 to November 1, 2022.
March 13, 2018: The Low Impact Hydropower Institute has received a complete application for a new term of Low Impact Certification for the Newton Falls Hydroelectric Project. The Project is located on the Oswegatchie River in the Town of Clifton, St. Lawrence County, New York, approximately 98 miles upstream of the river’s confluence with the St. Lawrence River. 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 Handbook and then review the Project’s 2018 application materials posted 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 email@example.com with “Newton Falls 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 May 12, 2018 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.
March 13, 2018: The Newton Falls Hydroelectric Project has been granted an extension of the current term through June 30, 2018.
December 29, 2012: The Newton Falls Project has been recertified as low impact for a second five year term, effective November 2, 2012 and expiring November 2, 2017.
February 29, 2008: The Newton Falls Project has been certified as low impact for a five year term, effective November 2, 2007 and expiring November 2, 2012.
November 1, 2007: Brookfield Power has submitted an application for certification of the Newton Falls Hydroelectric Project.
- Lower Newton Falls Recertification Questionnaire 2012
- Upper Newton Falls Recertification Questionnaire 2012
- Newton Falls Recertification Application Appendices
- Newton Falls Recommendation Memo