e-183 line relocation
DESCRIPTION
E-183 Line Relocation. Presentation to: NEPOOL Reliability Committee March 2, 2005. 115 kV Line E-183. 115 kV PTF transmission line E-183: Connects Manchester Street station in Providence, RI to Brayton Point station in Somerset, MA - PowerPoint PPT PresentationTRANSCRIPT
E-183 Line Relocation
Presentation to:
NEPOOL Reliability Committee
March 2, 2005
115 kV Line E-183 115 kV PTF transmission line E-183:
Connects Manchester Street station in Providence, RI to Brayton Point station in Somerset, MA
Supplies load at Narragansett Electric Co. Phillipsdale, Wampanoag, Mink Street, and Warren substations
Approximately 16 miles in length
Geography Leaving Providence, the line --
crosses the Providence River, traverses alongside I-195 and India
Point Park, crosses through India Point Park,
and crosses the Seekonk river into E.
Providence
Alignment of Line E-183 and Interstate Highway I-195
I-195 Relocation RIDOT is relocating Interstate highway
I-195 through Providence Need based on structural
deterioration, safety deficiencies, and inadequate capacity
Line E-183 must be relocated to accommodate the highway construction project Must be completed by Fall 2005
River Crossing The Seekonk River Crossing is
approximately 87 years old (ca. 1918) Narragansett Electric Co. (NECO)
would like to replace this river crossing coincident with the highway relocation work
Replacing the Seekonk River crossing provides an opportunity to address issues relating to India Point Park and the historic Washington Bridge
Overhead Alignments
Proposed Plan Underground cable from Manchester
Street (Franklin Square) to the Phillipsdale tap in E. Providence satisfies needs of: RIDOT NEPOOL Narragansett Electric Co. State and Local Authorities
Underground Alignment
Proposed Cost Recovery Stakeholders recognize that while the
PTF transmission line provides regional benefits, the primary benefit of undergrounding this section is local
Total Cost $16.724M Local Support $12.949M Regional Support $ 3.775M
Cost Basis for Regional Support
Equivalent to cost of practical and feasible alternative – the “Bridge North Alignment” Removes line from India Point Park Relocates line to north side of
historic Washington Bridge
Cost of AlternativesProvidence
River Crossing
India Point Park Section
Seekonk River
Crossing
East Providence
SectionTotal
O/H – Bridge North 0.300M $2.275M 0.500M 0.700M 3.775M
O/H – Original 0.300M $2.275M 0.300M 0.000M 2.875M
O/H – Tockwotten 0.300M $2.275M 0.400M 0.300M 3.275M
O/H – Bridge South 0.300M $2.275M 0.400M 0.600M 3.575M
Underground 4.700M $4.150M 4.600M 3.274M 16.724M
Conclusions Relocating line E-183 through
Providence provides both regional and local benefits
A combination of regional and local cost recovery is proposed
Regional cost recovery based on cost of practical and feasible overhead alternative Total Cost $16.724M Local Support $12.949M Regional Support $ 3.775M