FUDR Annual Meeting October 15, 2013 Cannonsville Hydroelectric - - PowerPoint PPT Presentation

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

• ther 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. 5

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
• r are disturbed (i.e., mowed grass areas rather than forested areas)

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Cannonsville Viewsheds

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Top of Dam

C2 C1

Aesthetic Study – Cannonsville Viewsheds

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Rendering Aesthetic Study – Cannonsville Project Rendering

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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
• n 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

• therwise 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
• r duration of downstream flow releases as a result of hydropower
• perations
• 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 afiore@dep.nyc.gov View DEP’s website: www.nyc.gov/dep Look under A to Z Go to “H” for Hydro

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