fudr annual meeting october 15, 2013 cannonsville ... · •450 sq. mi. impoundment: •13 miles...
TRANSCRIPT
FUDR Annual Meeting October 15, 2013
Cannonsville Hydroelectric Project FERC No. P-13287
Cannonsville
Agenda
Introductions Project Status Review
Existing Facilities Proposed Project Facilities
Re-cap of Studies Operating Regime
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Cannonsville Project Status Review
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Cannonsville - Existing Facilities
Existing Intake Structure
Release Works
Emergency Gate Tower
Put in Service in 1964 Watershed Drainage Area: •450 sq. mi. Impoundment: •13 miles long •Storage capacity of 300,990 acre-feet or 95.7 BG at normal pool (1,150 ft) Dam: •Rolled earth filled embankment •2,800 feet long •1,100 feet wide at toe | 45 feet wide at top •175 feet high – elevation 1,175 feet Spillway: •Ungated •Split level Spillway 800 feet long •Lower: 240 feet long at elevation 1,150 •Upper: 560 feet long at elevation 1,158.1 feet
Water Supply Intake (5 mi. upstream)
For purposes of this license application, the City selected the largest station hydraulic capacity of 1,500 cfs based on the information provided by turbine vendors that had been contacted, which is based on a configuration consisting of four turbines.
The existing conduit leading to the low-level release works will be bifurcated with a wye connection to a 12-foot steel diameter pipe. The 12-foot diameter pipe will run in a south to north direction and will be tapped with four individual wye connections to convey flow to individual steel penstocks leading to four turbines.
An approximately 168-foot long by 54-foot wide powerhouse will be located adjacent to the existing low level release works building.
Equipment within the powerhouse will include four turbines and generators, switchgear, generator phasing cabinets, control panels, hydraulic power unit, cooling water equipment, station battery and charger, oil/water separator sump with pump, and other related equipment.
The powerhouse walls will be cast in place concrete. One set of stoplogs will be included in the powerhouse superstructure to allow dewatering of the draft tube exit chamber.
A new 13 kV power line will be constructed from the powerhouse to a new substation, which will be connected to an existing New York State Electric & Gas Corporation 46 kV transmission line that traverses the site.
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Cannonsville – Proposed Project Facilities
Feature Size # of Turbines/Runner Diameter
2 @1760 millimeters (mm) (5.7 ft) 2 @ 890 mm (2.9 ft)
Turbine Type Horizontal Francis
Rated Net Head 122 feet (37.2 meters)
Min/Max Turbine Hydraulic Capacity
2 @ 50-125 cfs 2 @ 250-625 cfs Max hydraulic cap. 1,500 cfs Min operating cap. 50 cfs (40% of 125 cfs)
Maximum Electrical Capacity
2 @ 1.185 MW 2 @ 5.855 MW Total elec cap: 14.08 MW
Rated Speed 2 @ 257.1 rpm 2 @ 450 rpm
Description of Turbines
Cannonsville Development Cannonsville- 4 turbines, 1,500 cfs, 14.08 MW
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Cannonsville Development – Underground Electric Option
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Cannonsville Development
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New Powerhouse Rendering
NYSDEC State Pollution Discharge Elimination System General Permit for Stormwater Discharges will be obtained in an area of soil disturbance greater than 1 acre (applies to Cannonsville only). As part of this permit, a Stormwater Pollution Prevention Plan is required.
All water pumped out of the dewatered area of the tailrace will be conveyed to the sedimentation basin to contain and prevent sediment from entering the West Branch of the Delaware River
Upon completion of construction, the spoils disposal area will be graded to match the area topography and seeded
Erosion Study
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Cannonsville Erosion Control Measures
Aesthetics Study
Project areas are not visible from the reservoir because the height of dam effectively screens new structures
Due to the absence of public viewsheds, the Project will not have material adverse impacts on aesthetics
To ensure that the Project is consistent with the general character of the area: • The new powerhouse will be constructed so that its appearance is
consistent with the appearance of the existing release works building and surroundings
• New power lines will be constructed, to the extent possible, in the same location as existing power lines
• The new substation will be constructed adjacent to an existing building • Staging and spoils areas will be located primarily in areas that have been
or are disturbed (i.e., mowed grass areas rather than forested areas)
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Cannonsville Viewsheds
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Top of Dam
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Aesthetic Study – Cannonsville Viewsheds
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Rendering
Aesthetic Study – Cannonsville Project Rendering
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16 Rendering
Aesthetic Study – Cannonsville Project Rendering
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Cultural Resources Study
There are no properties listed on the State or National Register of Historic Places, or places eligible for such listing, located adjacent to the Project areas
The potential for locating intact archeological or cultural sites within the Project Areas is virtually non-existent because of the prior construction of the water supply system
Given the locations of the new facilities and equipment and the scope of the construction activities, the Project will not have a material impact on archeological or cultural resources
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Socioeconomic Study
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One-time increase in economic output in Delaware County of approximately $4 million
Approximately 59 person-years of employment in construction and
related industries during the 36 month construction period
When operating, facility expected to increase Delaware County economic activity by $2.7 million per year
When operating and generating electricity, will displace generation from higher-cost, fossil-fuel fired generation resources
Wholesale electricity prices reduced 0.7% or $0.27 per MWh annually
Reduce CO2 emissions by approximately 23,000-47,000 tons annually, depending on the type of fossil-fuel fired generation displaced
Equivalent of removing approximately 5,000-10,000 passenger vehicles from the road
Total annual estimated savings to Upstate New York of approximately $10 million
Wetlands, Wildlife, and RTE Report • Botanical Resources
Vegetative cover types in impact areas include: open fields, mixed forest, and emergent and riverine wetlands
10 invasive plant species were found in the Project areas Location of the staging areas will have limited impacts - primarily to existing mowed
fields Locations of the generator lead, substation and interconnection facilities are not
expected to cause or lead to adverse environmental impacts
• Wetlands, Riparian and Littoral Habitats Location of the new powerhouse and tailrace will result in the conversion of a low-
quality wetland to an open water area – will likely require mitigation Two other wetlands were identified in the buffer zones, but outside of impact areas Three vernal pools were identified in or adjacent to the Project areas, but outside of
impact areas
• Wildlife Numerous bird species were observed, but no nesting areas were found in the
Project areas Evidence of reptiles and amphibians were found in the Project areas, but impacts to
these species are expected to be limited as their habitats are located outside impact areas
• Rare, Threatened, and Endangered (RTE) Species Bald eagles were observed, and two nesting locations are within the project
boundary. A USFWS Take Permit and DEC Article 11 permit will be required Jefferson’s and longtail salamanders may use at least one of the vernal pools
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Cannonsville Site Conditions
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Entrainment Study
Based on the habitat/life history requirements and fish swimming speeds, entrainment is expected to be low for all species
The risk of entrainment for fry and juvenile fishes is minimal Pressure differentials between the intake structures and release works cause
fish mortality regardless of the hydropower facilities Additional intake protection measures are not needed based on the
assessment of entrainment and mortality A low level fish passage is not practical due to the pressure differential and
nature of the existing facilities A surface level fish passage is not desirable due to mixing warmwater with
downstream coldwater fishery and its incompatibility with the habitat of the species of most interest (e.g., trout)
Field studies being conducted to validate study and establish a baseline
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Preliminary Summary of Fish Field Surveys
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Modeling of turbine operation for the License Application is based on the current Flexible Flow Management Program with Operations Support Tool (FFMP-OST) • Estimated annual output of approximately 42,000 MWh
Project will be operated in accordance with the requirements of the applicable operating protocol agreed to by the parties to the 1954 Supreme Court Decree (Decree Parties), including the maximum discharge rate specified therein • Water available for generation at Cannonsville will be comprised of
conservation releases, directed releases, and water that would otherwise spill to the extent that such releases are consistent with the discharge mitigation releases as established in the applicable operating protocol
• The City does not propose to modify the magnitude, timing, frequency or duration of downstream flow releases as a result of hydropower operations
• Maximum discharge rate pursuant to FFMP-OST is 1,500 cfs
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Operating Regime
For More Information
Anthony J. Fiore Director, Office of Energy
718.595.6529 [email protected]
View DEP’s website: www.nyc.gov/dep Look under A to Z Go to “H” for Hydro
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