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Cascade
is developing the first major water supply in the region
in decades by connecting existing systems and bringing on a new
water source, Lake Tapps, to meet future water demands of Members.
Cascade's Transmission and
Supply Plan (TSP) anticipates total capital expenditures
by 2024 of between $402 million and $481 million for the facilities
(including water transmission lines, booster pumps and treatment
plants). The range is effected by different potential alignments
and routes, and different sizes and combination of pipes that are
now being evaluated by Cascade for bringing these two major sources
of supply to its Members.
For the initial six years covered by the TSP, Cascade anticipates
capital expenditures of between $122 million and $163 million, depending
on decisions made relative to alternative pipeline routes and sizes.
Cascade anticipates paying for these capital facilities through
a combination of state/federal grants and loans, revenue bonds,
Member charges, and Regional Capital Facilities Charges.
The Cascade Regional Water Supply System includes a series
of regional transmission pipelines designed to deliver water to
Cascade Members. The Tacoma-Cascade
Pipeline consists of two parts: the Central Segment
and the North Segment, which will deliver water purchased
from Tacoma to Cascade Members.
The Central Segment (from the Tacoma system to the Seattle system)
moved into the final design phase in mid-2006. In late 2005, planning
also began on identifying potential routes for the North Segment
(from the Central Segment to Cascade Members). The North Segment
pre-design began in the summer of 2006. While these
activities represent significant steps, the overall transmissions
options and alternatives are still being developed and work will
continue in 2007 and beyond.
The Bellevue-Issaquah
Regional Transmission Pipeline (BIP) was constructed in 2002.
The BIP pipeline will be used to convey water to the Issaquah Highlands
and Talus developments and to the Sammamish Plateau Water & Sewer District.
The BIP pipeline was brought into operation in the summer of 2006.
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