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PROJECT UPDATES - Arlington, Texas
The Arlington landfill is owned and
operated by the city of Arlington, Texas.
Arlington has a population of 332,969 according to the
2000 census and is the
third largest city by population in the north central
Texas region. The landfill
accepts approximately 1,200 tons per day of municipal
solid waste and is divided
into a West Disposal Area and an East Disposal Area.
The West Disposal Area is a
pre-Subtitle D area and was closed with a clay cap in
1998. The East Disposal
Area is divided into Sectors 1 through 6. Sector 1 is
a Pre-Subtitle D area that began
receiving waste in 1978. Sectors 2 through 6 are all
permitted as Subtitle D areas
that will have geomembrane liners and caps.
The City installed a gas collection
system in 1997 consisting of 77 vertical landfill
gas ("LFG") extraction wells and 5 LFG horizontal collectors
in the West Disposal
Area and 12 vertical LFG extraction wells in Sector
1 of the East Disposal Area.
LFG production has been approximately 1,100 cfm. Renovar
operates the gas
collection system under a long-term contract with the
City. The City was anxious
to have an environmentally friendly beneficial use project
at its landfill and Renovar's
contract with the City allowed it to develop such a
project.
Renovar determined that the best project,
though not the easiest, would be to
transport the LFG approximately four (4) miles for use
at the Village Creek
Wastewater Treatment Plant ("Village Creek Plant") owned
by the city of Fort Worth,
Texas. The Village Creek Plant is capable of processing
144 million gallons of
wastewater each day and generates significant amounts
of methane gas during
anaerobic digestion. As part of its energy recycling
efforts, the Village Creek Plant
utilizes its digester gas to generate electricity on-site
and uses the waste heat from
the system to heat digesters that produce methane. The
Village Creek Plant had
plans to install two new 5 MW gas turbine generators
that would require more fuel
than the volume of digester gas produced by its own
system. Renovar initiated
discussions with the City of Fort Worth to utilize the
Arlington LFG as a supplemental
fuel for the new electric generation system at the Village
Creek Plant. Complicating
matters was the fact that the City of Fort Worth had
contracted out much of its
electric generation operations to Lone Star Energy Services,
Inc., an affiliate of
the local utility company. Renovar then successful negotiated
the sale of the
Arlington LFG directly to Lone Star for use at the Village
Creek Plant.
Perhaps the most challenging obstacle
to the project, the solution to which required
the most time and ingenuity, was the fact that the only
feasible pipeline route from
the Arlington landfill to the Village Creek Plant was
through the River Legacy Park.
The River Legacy Park has been described as "a 1,300
acre oasis on the Trinity
River in the heart of north Arlington". The land was
donated to the City of Arlington
as parkland. In 1988, with the support of the Arlington
Parks and Recreation
Department, a group of Arlington citizens formed the
River Legacy Foundation,
whose mission is "to preserve and enhance land along
the Trinity River and its
tributaries as an extraordinary recreational, educational
and natural resource".
The public/private partnership between the City and
the Foundation has been
enormously successful in preserving the land, providing
environmental education
to the public, and offering recreational opportunities
with trails, river overlooks,
picnic areas and playgrounds. The centerpiece of the
Foundationıs education
effort is the 12,000 square foot River Legacy Living
Science Center, which houses
an impressive collection of interactive exhibits.
Renovar determined that the best way
to cross the Park with a minimum amount of
environmental impact was to work cooperatively with
the Cityıs Parks and
Recreation Department, the River Legacy Foundation,
the cities of Arlington and
Fort Worth, and the Trinity River Authority ("TRA"),
an independent State agency.
Renovar hired naturalists and surveyors to identify
those routes through the Park
least likely to damage older, larger trees, even if
by doing so it created a longer
and more expensive pipeline route. Renovar walked the
proposed routes on
numerous occasions with representatives of the Parks
and Recreation Department
and the Foundation. The TRA allowed Renovar to utilize
parts of an existing
easement that kept the impact of the pipeline on the
trees to a minimum. When
it bored under the Trinity River, Renovar bored hundreds
of additional feet beyond
the riverbank in order to avoid a Park recreational
trail and a number of magnificent
older trees. Both cities provided adjacent rights of
way, and the Neighborhood
Services Department of the City of Arlington provided
enormous assistance in
working through the various administrative agencies
involved in the Project. In the
end very few trees, and none of the trees identified
by the Parks and Recreation
Department as particularly in need of protection, were
damaged by the Renovar
pipeline.
Renovar was also mindful of the public
education mission of the River Legacy
Foundation and is working with the Foundation to further
that mission. With design
approval by the Foundation, Renovar is developing displays
explaining the project
and its environmental benefits. The displays will be
placed at two locations; in the
Park near a hiking trail along the Trinity River, and
at the River Legacy Living
Science Center. The Project was structured to provide
long-term economic benefits
to all the parties in the belief that everyone must
benefit from a renewable energy
project in order to make it work. Renovar is expanding
the gas collection system at
the Arlington landfill to maximize the amount of LFG
available for the project. The
cost of the expansion and the operation of the gas collection
system are being
undertaken by Renovar at no cost to the City of Arlington.
The LFG being purchased
from Renovar by Lone Star on behalf of the City of Fort
Worth is priced below the
market price of natural gas on an MMBtu basis. Renovar
is selling the LFG at a
reasonable price that covers its costs and provides
an acceptable rate of return.
The commercial terms of the transaction, while not a
windfall to any party, provides
reasonable commercial benefits to all. This Project
is the ultimate renewable energy
project. LFG that would otherwise be flared is being
combined with digester gas from
the wastewater treatment process to fuel electric generation
facilities and provide
waste heat for other uses. The voluntary expansion of
the landfill gas collection
system reduces the amount of methane and carbon dioxide
emissions that would
otherwise be produced at the landfill. By utilizing
landfill gas in conjunction with
digester gas as alternative fuel sources, the Village
Creek Plant is able to reduce its
dependence on fossil fuels, which is one of the primary
objectives of any renewable
energy project. One of the most striking aspects of
this Project is the high degree of
cooperation that was developed over time between adjacent
municipalities, an
independent State agency, a public utility company,
a private non-profit
environmental foundation, and a renewable energy developer.
The existence of so
many diverse parties in a single project is often sufficient
in and of itself to doom
that project. Despite the obvious merits of this Project,
it had been pursued in the
past for a number of years without success.
Today, however, with renewable energy
gaining acceptance throughout the
country, parties are more likely to try and make projects
work rather than dismiss
them as environmentalistsı folly. Renovar anticipates
that the success of this Project
and the resulting favorable publicity will encourage
other municipalities in the north
Texas area to seek their own renewable energy success
stories. Developing
public/private partnerships are the key to more extensive
renewable energy
development in this country and globally. This Project
demonstrates that such
partnerships can work.
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