Cost Estimates

Major quantities were manually calculated for the base case layouts, which were prepared for the Q.5 turbine flow for the L1khu - IV Hydroelectric Project. This layout is presented in Volume II - Figure 4.3. The general arrangements of the structures for the various project alternatives were essentially the same as that for the base case. These quantities were used to calibrate the computer-based spreadsheets set up to compute excavation and concrete quantities for the dam, desander, headrace tunnel, surge tank, pressure shaft, powerhouse and the tailrace, etc. for the remaining capacity options. The costs of electro-mechanical equipment, viz. turbines, generators, powerhouse cranes, inlet valves and auxiliary mechanical and electrical services were derived from data provided by MHSP and from curves. For the headrace tunnel, Barton's Rock Quality Index Q was used to estimate the rock support requirements and a computer-based spreadsheet was set up to calculate quantities of excavation, shotcrete, rockbolts, concrete lining and steel ribs accordingly. _

The cost of access road was obtained for unit length for national highways in hilly terrain from in-house databases. Similarly, the per unit cost of 132 kV Transmission Line was obtained from in-house databases and recent projects in Nepal.