PERFORMANCE BUDGET 1998-99 - Ministry of Power

instructions for suspending the activities of blasting and movement of vehicles in the
dam area. Because of these restrictions about two and a half months of the working
season has been lost.
Progress achieved till March,’98 is as under:
i) Core stripping : 1014.92 Th. Cu. m.
ii) Placement of Shell : 128.90 Th. Cu. m.
iii) Stock Piling of Clay : 302.80 Th. Cu. m.
iv) Top Soil Removal : 585.77 RM.
v) Excavation of underground galaries : 369.15 Th. Cu. m.
B) POWER HOUSE: The work at various cavities, adits and drainage galleries is in progress
in the three packages:
i) Package-I: Open excavation in the control gate shaft area had been in progress. The total
quantity excavated so far is 771.50 Th. Cu. m. till March,’98.
Underground excavation for cavities of Butterfly Valve Chamber and Penstock
Assembly Chamber is continuing. The cumulative excavation done is 21.28 Th.Cu.m.
and 23.21 Th.Cu.m. in these two cavities respectively till March’98. Excavation for
lower horizontal pressure shafts and penstock No. 1, 2 & 3 has been completed.
Excavation of pilot shaft for 110 m. deep vertical Penstocks No. 1 & 4 have been
completed and further widening of Penstock no. 1 has been taken up.
ii) Package-II: Underground excavation of Machine Hall and Transformer Hall caverns and
Crane beam casting in Machine Hall are the major activities. The total excavation of 82.84 &
59.24 Th. Cu. m. have been achieved in these caverns so far respectively. The work of crane
beam casting is nearing completion.
In addition 561.10 RM of underground excavation in Drainage Galleries has been carried
out till March,’98. The excavation in expansion chamber is in progress and total quantity
excavated so far is 6.04 Th.Cu.m.
iii) Package-III: Underground excavation for tail race tunnels TRT-1 & TRT-2 is in progress.
The total quantity excavated so far is 612.0 RM and 540.0 RM respectively in TRT-1 &
TRT-2. The cumulative quantity of open excavation work at TRT’s portals stands at 175.90
Th.Cu.m.
C) CONTRACTS:
i) Spillway: Techno-commercial bids submitted by the prequalified parties have been opened
and construction methodology based on Technical Advisory Committee observations have
been finalised. The Techno-commercial evaluation is in process.
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