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36 HYDRO REVIEW / June 2017 www.hydroworld.com
GRP penstock was placed in August 2012.
Also at the end of August, the order was placed
for the turbines and generators from overall
electromechanical supplier Andritz.
Delivery of the GRP pipe sections (
manufactured by Flowtite) by supplier OTEK
started in late November 2012. Penstock
installation was completed in August 2013.
Installation of mechanical and electrical
equipment was completed in December 2013,
testing and commissioning occurred in January
2014, and a Taking Over Certifcate was issued
on Jan. 29.
Tus, the project went from a preliminary
design to a completed, functional hydropower
system in about two years. Rapid, but thor-
ough review of the EPC contractor’s technical
submittals by JPC’s engineer formed a key
part of the successful completion of this fast-
tracked project. During testing, the units have
performed slightly better than their targets,
and the system continues to perform well.
Accomplishments at the Maggotty Falls
expansion project include the following:
• Replaced a leaking and failure-prone water
conductor (woodstave pipe) with a modern
• Utilized existing project components such
as the river diversion weir, a short tunnel,
and the switchyard to reduce project cost
and construction duration.
• Required careful integration of the control
and emergency bypass systems for the
existing hydropower plant, to mitigate
pressure surges and protect the penstock.
• Was executed at a total cost of about
US$35.8 million, which is about
US$593,000 below project budget; and
• Te expansion project was constructed on
time and without any major safety incident.
Tis article has presented a few of the many
issues that were addressed in order to achieve
the success of the Maggotty Falls hydropower
Maggotty Falls and the 3-MW Munro
wind farm are projects recently undertaken
by JPS, which are intended to provide renewable, competitively-priced electricity to its
customers while reducing its dependence
on expensive imported oil. Tese projects
are important components in the quest to
provide Jamaica with reliable electricity, to
promote its economic growth and to thereby
enhance the prospects for social stability and
peaceful development. ■
Alston Watson, PE, is manager of expansion projects for
Jamaica Public Service Co. S. Mark Allen, PE, was project
manager for planning and owner’s engineering services
for the Maggotty Falls expansion and is a vice president
at MWH (now part of Stantec).
In this audio fle at http://bit.
ly/2ru67l8, Alston Watson and S. Mark
Allen briefy share additonal details
about some of the challenges they successfully overcame during the Maggotty
Falls expansion project.