THE PROJECT INCLUDES THE FOLLOWING TRANSMISSION LINES:
- 400Kv D/C Palatana-Silchar Twin Moose Conductor Transmission Line - 247.39 Kms
- 400Kv D/C Silchar-Byrnihat (one circuit on D/C towers) Twin Moose Conductor Transmission Line- 214.41 Kms
- 400Kv D/C Byrnihat-Bongaigaon (one circuit on D/C towers) Twin Moose Conductor Transmission Line- 201 Km
- 400Kv D/C Silchar-Azara (one circuit on D/C towers) Twin Moose Conductor Transmission Line- 256.41 Km, and
- 400Kv D/C Azara-Bongaigaon (one circuit on D/C towers) Twin Moose Conductor Transmission Line- 159 Km
THE DATE OF COMMISSIONING OF THE TRANSMISSION LINES ARE AS FOLLOWS:
| Palatana-Silchar Transmission Line- |
01.09.2012 |
| Silchar-Byrnihat Transmission Line- |
01.03.2013 |
| Byrnihat-Bongaigaon Transmission Line- |
22.02.2015 |
| Silchar-Azara Transmission Line- |
27.07.2014 |
| Azara-Bongaigaon Transmission Line- |
16.01.2015 |
SALIENT FEATURE OF LINE AND TOPOGRAPHY
The 400Kv D/C interstate transmission line between Pallatana and Bongaigaon via Silchar has a route length of 662.8 kms and passes through Hilly terrain (300 kms approx.), reserve forest (124 kms) and cultivated lands in the states of Tripura, Meghalaya and Assam.
FOREST DETAILS
The transmission line traverses through dense forest in the three states of Tripura, Meghalaya and Assam involving approximately 124 Km of line length out of the total 662.8 Kms. i.e. 18.7%. The forest involvement in states of Tripura, Meghalaya and Assam was as under:
| STATE | Line Length (kms) | Forest Area in(ha) | Forest Length in (kms) | Total tower locations | Tower Locations in Forest |
|---|
| Tripura |
172 |
334.03 |
72.62 |
470 |
207 |
| Meghalaya |
182 |
114.015 |
24.786 |
499 |
40 |
| Assam |
308 |
120.59 |
26.219 |
862 |
83 |
| Total |
663 |
568.635 |
123.625 |
1831 |
330 |
MAJOR RIVER DETAILS
The transmission line also crosses major rivers, viz, Brahamputra, Barak and Champabati. 2 nos. well foundations and 1 no. pile foundation were constructed in midstream of Brahmaputra River. Further,1 no. pile foundations have been constructed at the bank of brahamputra river. The maximum height of tower erected in Brahamputra river crossing is 138 metres(329.32 MT). For Barak river, 4.5 metre deep foundations were cast on the river banks and with the use of tall towers (122 metre, 210 MT per tower ) river was crossed. At Champavati river 1 no. pile foundation was cast to cross the river.