SALIENT FEATURES
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1.0 |
LOCATION |
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Country |
India |
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State |
Bihar |
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District |
Supaul |
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Sub Division |
Supaul |
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Block |
Bhaptiahi |
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River |
Kosi |
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Project Area |
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Longitude |
E 860 47’ |
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Latitude |
N 260 24’ |
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Access to the Project |
Supaul–Bhaptiahi Road (SH) on left bank Nirmali–Kanauli embankment Road on right bank |
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Nearest Village |
Piprahi (Dagmara) on right bank Simari (Bhiptiahi) on left bank |
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Airport |
Patna – 350 km |
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Nearest Rail Head |
Supaul – 20 km on left bank Nirmali – 22.5 km on right bank |
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Port |
Kolkata |
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2.0 |
SCHEME |
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Type |
Run of the River |
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Installed Capacity |
5 x 25 MW |
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3.0 |
HYDROLOGY |
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Catchment Area (Upto Hanuman Nagar) |
61,816 sq. km. |
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Maximum Annual Rainfall |
2191 mm |
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Minimum Annual Rainfall |
1291 mm |
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Maximum Intensity (1 Day) at Birpur |
318.5 mm |
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Maximum Design Flood (At Hanuman Nagar Barrage) |
26897 cumec |
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Annual Average Sediment Load (1973-81) |
57.35 gm/litre. |
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4.0 |
POWER POTENTIAL |
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FRL |
70.0 m |
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MDDL |
68.5 m |
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Gross Head |
5.50 m |
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Net Head |
5.00 m |
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Discharge available for power generation |
2832 m3/sec |
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Installed Capacity |
6 x 21 MW |
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Annual Energy Generation |
347 MU |
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5.0 |
DIVERSION STRUCTURE |
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Type of Diversion Structure |
Barrage |
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6.0 |
POWER HOUSE |
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Type |
Surface Type |
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Size |
89 m (Width) x 176 m (Length) |
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Turbine Centre Line Level |
EL 53.0 m |
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Machine Hall Level |
EL 68.25 m |
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Service Bay Level |
EL 68.25 m |
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Design Discharge per unit |
472 cumec |
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7.0 |
TYPE OF TURBINE |
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Type |
Bulb |
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Rated Discharge |
472 m3/sec |
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Number |
6 |
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Capacity |
21 MW |
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8.0 |
GENERATOR |
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Type |
Synchronous |
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Capacity |
23333 KVA each |
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Number |
6 |
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Power Factor |
0.9 |
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Frequency |
50 Hz |
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Number of Phases |
3 |
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Voltage |
11 KV |
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9.0 |
STEP UP TRANSFORMER |
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Type |
Outdoor type OFWF |
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Quantity |
6 |
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Capacity |
23.35 MVA 3-Phase |
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Voltage Ratio |
11 / 132 KV |
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10.0 |
TIME OF COMPLETION |
4 Years |
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TAIL RACE CHANNEL AND DRAFT TUBE GATE |
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Width and Length of Tail Race Channel per unit |
22.6 m x 48.75 m |
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No of Gates Provided |
Two nos. |
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Size of Draft Tube Gate |
10.3 m x 9.0 m |
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No & Size of Draft Gate Openings |
6 nos of 19.0 m x 13 m |
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Sill Level of Gate |
56.0 m |
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Design Discharge per unit of in TRC |
472 cumec |
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Bottom of Draft Tube |
El 46.75 m |
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Max TWL/Flood Level |
EL 66.0 m |
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Normal TWL |
EL 64.0 m |
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TW weir Level |
EL 61.0 m |
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11.0 |
INTAKE CHANNEL |
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Width of Intake channel per unit |
22.6 m |
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Length of Intake channel |
76.25 m |
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Design Discharge per unit in the channel |
472 cumec |
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No of intake gates |
2 x 6 nos |
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Sill Level of Gate |
58.0 m |
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Intake Level – a) Overt b) Invert |
63.25 m 42.75 m |
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Intake weir Level |
62.0 m |
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12.0 |
SWITCHYARD |
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Type |
Open |
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Size |
70.0 m x 135.0 m |
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Location |
On the Left Bank side downstream of Power house. |
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13.0 |
TRANSMISSION LINE |
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Voltage for Transmission line |
132 KVA |
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Length of Transmission Line |
30 Kms |
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Name of Substation where power is finally dispatched |
Supaul |
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14.0 |
BARRAGE |
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Type |
R.C.C Raft with piers & gates |
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Top Elevation of Pier |
EL 72.0 m |
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Crest Elevation for Spillway bays |
EL 62.0 m |
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Crest Elevation for under sluice bays |
EL 61.0 m |
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Upstream Floor level in Spillway bays |
EL 61.0 m |
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Downstream Floor Level in Spillway at C.C Block apron |
EL 57.40 m |
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Upstream Floor Level in Under sluice bays |
61.0 m |
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Downstream Floor Level in under sluice bays at C.C blocks apron |
56.34 m |
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Stilling Basin floor level in Spillway bays |
55.0 m |
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Stilling basin floor level under sluice bays |
54.0 m |
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Length of concrete floor in under sluice |
83.58 m |
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Length of Concrete Floor in Spillway |
80.20 m |
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Length of Each span between piers |
18.0 m |
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No of spans in Spillway |
35 |
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No of Spans in under sluice |
6 +2 nos for bypass gates |
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Thickness of upstream floor |
1.50 m |
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Thickness of downstream floor |
2.0 m |
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Thickness of pier |
2 m |
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Height of Barrage gates |
8 m in spillway and 9 m in under sluice |
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Design Discharge of spillway and under sluice bays |
27000 cumecs |
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Energy Dissipator |
Hydraulic jump type Stilling Basin |
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15.0 |
DIVERSION ARRANGEMENT |
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Type |
Diversion Channel and Coffer Dam |
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Diversion Capacity |
3160 cumecs |
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Diversion Flood |
1 in 25 Yrs Flood |
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Coffer Dam type |
Earthen with clay blanket on upstream side |
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Height of Coffer Dam |
3.5 m |
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16.0 |
BARRAGE POND |
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Full Pond Level (FRL) |
EL 70.0 m |
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Min Draw Down Level (MDDL) |
EL 68.5 m |
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Gross Storage |
300 MCM |
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Live Storage between MDDL and FRL |
100 MCM |
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Area under submergence at FRL |
9000 ha |
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17.0 |
COST OF PROJECT |
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Cost of Project |
Rs. 1580.95 Crores |
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Cost of Civil Works |
Rs. 1291.58 Crores |
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Cost of E & M Works |
Rs. 289.37 Crores |
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18.0 |
LEVELLISED TARIFF |
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a) Present condition of development |
Rs. 5.33/KWh |
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b) Without Kosi High Dam but with full development of Hanuman Nagar Barrage canal system. |
Rs. 6.94 / KWh |
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c) With Kosi High Dam and with full development of all canal commands downstream of proposed Kosi High Dam |
Rs.6.24 /KWh |
| I |
