The project that started on February 24, 2015 and whose phase one comprises the construction of an 11.8km diameter water diversion tunnel
from Maragua River to Ndakaini Dam, will be complete by March next year with the government hailing the project as one of its kind.For the first time, water will be transported underground without interfering with the general environment.
Hydropower project manager Deng Siwen informed that since the second half of last year, the spillway have been excavated, and the construction of the seepage prevention wall, the diversion tunnel
, the underground powerhouse and the tailwater tunnel have also been excavated, while 30 working faces have been opened.
The Laiban Dam project has been set, and the previous administration even began constructing the diversion tunnel
. Somehow, that project was stopped.
Suarez said if the construction resumes now, the diversion tunnel
will be finished in just one and half years.
Another possible water source is the Sumag River Diversion Tunnel
Project in Quezon province, House Minority Leader Danilo Suarez said as he has sought the completion of the project to help resolve the water crisis in Metro Manila.
The AG said the project management and the ministry reported that 10pc energy loss caused to NJHP by Kishanganga project could be compensated by a diversion tunnel
but it was not convincing justification because Pakistan lost water rights in international arbitration due to delays.
EPM is yet to regain control on the project's hydrology after a month since a land slide at Ituango's hydroelectric project site blocked the Cauca river's main diversion tunnel
causing the water level to rise prematurely in the project's dam.
The 25 percent civil works of the project has been completed as construction of access road/bridge, concrete batching plant, diversion tunnel
and spillway is in process.
The design compares the cost of sizes of diversion tunnel
against damages and delays related to over topping of Coffer Dam during monsoon.
The statistical analysis of the geologic conditions appearing in the excavation shows that the rock mass of the upper reaches of the diversion tunnel
on the right bank is thin and extremely thin-layered marble dolomite, whose length in the #3 diversion tunnel
is approximately 1,009.5 m, accounting for 68.6% of the total length.
Karakus, "Analysis of support requirements for a shallow diversion tunnel
at Guledar dam site, turkey," Engineering Geology, vol.