Bihar is power starved state there are not sufficient power projects in the state which can cater the energy need in Bihar. For this purpose Bihar State Hydro Electric Power Corporation was constituted in Dec. 1982 with a mandate to harness all possible resources of hydro energy to meet the existing demand gap of power. BSHPC is giving close attention to exploiting small energy resources and renewable energy recourse. BSHPC has identified several mini hydel projects in Bihar. Bathnaha is one of them.
Parman river is a perennial rivulet, which originates from Nepal and enters India near Jogbani this water as per the studies also comes from ice melting from Tibet also to the extent 57% and now it is increased due several earth wakes the seepage also passing through fracture of rocks due earth wakes and remaining water is through Nepal . The river crosses Birpur-Bathnaha-Jogbani road opposite to railway Bridge on Forbisgang-Jogbani section of NEF railway. Another perennial rivulet Burhi Dhar joins Parman river is at 500 m upstream of the above road bridge. The road bridge on Parman river is of 100 m span and the river bed is about 5 m to 6 m deep. The road bridge is located about 3 km from Jogbani and 1.5 km from Bathnaha.
|2. PROJECT AREA|
|i.||Longitude||:||North 26o 30‘|
|ii.||Latitude||:||East 87o15 ‘|
|iii.||Access to the Project||:||(NH)|
|iv.||Airport||:||– 300 Km|
|v.||Rail Head||:||Forbisganj-6 Km.|
|i.||Type||:||Run of the river|
|ii.||Installed capacity||:||4 x 2.0 = 8.0 MW|
|i.||Maximum annual rainfall||:||2191 mm|
|ii.||Minimum annual rainfall||:||1291 mm|
|iii.||Maximum intensity (one day)||:||318.5 mm|
|iv.||Design Flood||:||2000 m3/s|
|5. POWER POTENTIAL|
|i.||Maximum Gross Head||:||6.55 mm|
|ii.||Minimum Gross Head||:||6.00 m|
|iii.||Design (Rated) Head||:||5.0 m|
|iv.||Discharge available for power generation||:||193.5 m3/sec at 75% dependable year|
|v.||Installed Capacity||:||4 x 2.0 MW|
|vi.||Annual Energy Generation||:||35.075 MU|
|6. DIVERSION STRUCTURE|
|i.||Type of Diversion Structure||:||Gated concrete weir|
|iv.||No. of Gates||:||20|
|v.||Width of each pier||:||1.5 m|
|vi.||Clear Span||:||6.25 m|
|iv.||Machine hall floor level||:||EL 53.0 m|
|8. TYPE OF TURBINE|
|i.||Type||:||Horizontal Axis ‘S’ type Tubular Turbine.|
|ii.||Rated Discharge||:||48.375 m3/s per machine|
|iii.||Number of Turbines||:||4|
|iv.||Installed Capacity||:||4 x 2.0 = 8.0 MW|
|v.||Specific Speed of Turbine||:||717.77 kW – rpm|
|vi.||Rotational Speed of Turbine||:||120 rpm|
|i.||Type||:||Horizontal Axis Synchronous Generator coupled to turbine through a speed increasing gearbox|
|iii.||Number of Machines||:||4|
|vi.||Number of Phases||:||3|
|10. STEP UP TRANSFORMER|
|i.||Type||:||Outdoor type self cooled|
|iv.||Voltage||:||3.3 / 33 kV|
|11. SPEED INCREASING GEARBOX|
|i.||Speed on Turbine Side||:||120 rpm|
|ii.||Speed on Generator Side||:||750 rpm|
|12. COST OF PROJECT|
|i.||Cost of Project||:||Rs. 150.00 crores|
|ii.||Cost per KW installed||:||Rs. 75,000/-|
|iii.||Cost of energy||:||Rs. 2.21 / kWh.|
|iv.||Cost of sale of Energy||:||Rs. 2.74/ kWh.|
|13.||COMPLETION PERIOD||:||2 years|
TOPOGRAPHY & PHYSIOGRAPHY
Bathnaha project can be established creating a small reservoir on Parman River by constructing a diversion weir across Parman River near Barthpur village.
Kosi River Basin in India from a part of the Gangetic plains and is situtated in direct path of the tropical depressions during the monsoon season 85% of the annual rainfall occurs in the monsoon period of June to October. The catchments in Nepal contributes a major portion of the run-off in the Kosi River. The Parman is river Perennial River, which carriage huge discharge the boundary of Nepal is 6 km away of the project site. The discharge also come from melting of Himalayan snow. The ground table is very high. There is heavy seepage. This river to Tributary to Mahananda basin. The hydrological studies of the Parman River have been carried out in order to determine the Optimum Techno Economic Potential of the site to work out the design flood discharge and related issues.
This project after completion will generate the power (4 x 2 MW) with 20% over load (9.6 MW). The generated energy will be works out to be 35.075 GWH.
SOCIO ECONOMIC CONDITIONS
Socio-Economic condition of the area is not good. The project will improve the situation, as it would provide employment opportunities to the local people. This project will also serve for the purpose of flood control as well as improve the surrounding ground water level in every monsoon season, area and villages located on both banks of the Parman River face the threat of floods. Construction of earthen bunds on both banks of the river would thus not only provide requisite storage but would also ensure that the villages are protected from floods. It is understood that Bihar Government is prepared to bear the expenditure of constructing the requisite earthen bunds and hence the cost of constructing these bunds shall not be charged to Bathnaha HE Project.
The bridge will works as means of communication for the poor farmers. In this environmental friendly project which is eligible for 35% subsidy of carbon credit.
COMPONENT OF THE PROJECT
The project is dividing in to following component.
- Forebay, Power House, Switchyard
- Diversion weir with gated spillway
AWARD OF THE WORK
Tender for the execution of civil work for the Bathnaha Power Project was floated in February 2010 and the work was allotted to M/s Tecsol Sierra Engineering and Construction LLP. vide agreement no. 09 on Nov. 18, 2010 with agreement cost of Rs. 42,73,94,400.00 including construction of hydro mechanical gates.
Hydro-mechanical was allotted to M/s HPP with agreement cost of Rs. 2284.16 Lacs (Tax is extra as per statuary deduction in E/M works)
STATUS OF THE PROJECT
Civil works of Rs. 20,05,12,009.00
Mechanical works of Rs. 477.57 Lacs.
The work is held up since July 2013 to complete the balance work with prevailing schedule rate the amount comes to be
Civil works including hydraulic gates Rs. 1,46,54,75,538.00
The increase in the cost is due to increase in the quantity on the basis of construction drawing. In the agreement the quantity was based on DPR and also due to increase in the price of schedule rate of 2009 to 2015-16 .
|Sl. No.||Details of Project||Administrative approval year & letter no.||Bathnaha (Rs. in Lacs)||Remarks|
|1.||Project cost as per DPR||6561.89|
|2.||Administrative approval||Order no. 1411 dt. 23.03.11||6937.35|
|3.||Initial fund available|
|(i) State Govt.||375.02|
|5.||Total fund available||7051.89|
|6.||Fund Received till date|
|(ii) State Govt.||375.02|
Company is fully equipped with the required infrastructure to implement project on hand apart from skilled manpower etc. All materials required for the project are readily available with the Company. Following is the man power strength of the company:
|15 cubic mtrs/hr concrete mixer||–>||15|
|20 cubic mtrs/hr mixer||–>||5|
|40 mm needles||–>||40|
|Heavy centering materials||–>||25 thousand sft|
|Dewatering equipment||–>||200 hp|
|In house fabrication||–>||5 units|
|Inventory tools and tackles mis||–>||worth 100 laks|
|L & T Excavator PC 130||–>||4 Machines|
|L & T Excavator PC 210 zacsis/td>||–>||3 Machine|
|TATA Hitachi 80||–>||2 Machine|
|Bar bending & Cutting Machine||–>||3 set|
|TATA Hitachi 60||–>||2|
|Putzmeiser Concrete pump||–>||1|