Waimea Water_AR_20_Flip

WAIMEA WATER LIMITED | ANNUAL REPORT 2020
OVERVIEW
Construction
The Contractor, FHTJV, has
achieved for WWL a number of
major construction milestones.
Objective
WWL works collaboratively with
our Construction Contractor, and
to be responsive and open to
opportunities that enhance the dam
as the build progresses. WWL is
striving to build a world-class dam
that complies with regulations and
best practice guidelines.
Progress
Construction commenced in March
2019, with early work on the access
roads to site. As outlined earlier, the
site was shut down for five weeks in
2020 due to COVID-19. When work
recommenced on 28 April under
Level 3 restrictions, additional office
and amenity blocks and physical
distancing measures were required,
which impacted productivity.
Fortunately, favourable weather
conditions, along with the Contractor
mobilising more resources, have
helped recover some of the
construction programme, which is
currently six months behind. On any
given day, between 140 and 180
personnel can be onsite.
To date the Contractor has:
• Completed site establishment
works, including Lee Valley Access
Road upgrades and two bridges.
• Cleared approximately 80% of
the vegetation within the
reservoir footprint.
• Cleared, mapped and approved
much of the right-hand side
(RHS) abutment rock foundation.
• Completed approximately 90%
of the approximately 165m long
diversion culvert. Fifteen of 17
sections are constructed, with
temporary diversion works well
underway.
• Stabilised approximate 1,900m2
of the slope above the RHS plinth.
• Commenced construction of the
left-hand side (LHS) and RHS
plinth.
• Largely completed bulk
earthworks to remove overburden
and Class-3 rock.
• Commenced excavation and
cleaning of the spillway foundation.
• Completed early grouting work in
advance of river diversion.
• Imported 11,000m3 of Zone
3P drainage material of a total
forecasted 80,000m3.
• Extracted and processed
18,000m3 of river gravels into
drainage material.
An overview of progress to date and
the next phase of construction is
illustrated on page 27.
CONSTRUCTION PROGRESS BY NUMBERS
Diversion culvert 90%
Vegetation clearance 72%
Excavation 47%
Onsite material processing 22%
Concrete works 21%
Rock import 14%
Anchors 13%
Reo steel 7%
0% 25% 50% 75% 100%
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