BASANIA HEP_PFR - Ministry of Power

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uS'kuy gkbMªksbySfDVªd ikoj dkjiksjs'ku fyñ 4.1 INTRODUCTION CHAPTER IV Preliminary Feasibility Report Basania HE Project 3 X 30 MW TOPOGRAPHIC & GEO-TECHNICAL ASPECTS The proposed Basania H.E. Project in Narmada basin in M.P. is one of the schemes selected to be taken up in first phase. As per reassessment studies carried out in CEA, based on desk studies, Basania H.E. Project envisaged construction of a 55 m high lifting dam with FRL of 481.8 M, 9 Km long HRT, a powerhouse with installed capacity of 60 MW. The tail race level was 426.7 M. (Ranking studies brief write – up and Layout are appended as Appendix- III). After further studies proposed scheme has a dam with dam-toe powerhouse having FRL of 482 M. The geological inputs mainly have been provided by the Geological Survey of India (GSI Report and GSI letter dt 21.01.04 appended as Appendix - V). REGIONAL TOPOGRAPHICAL AND GEOTECHNICAL FEATURES OF PROJECT AREA. The river Narmada, one of the prominent river in M.P., takes off from Amarkantak in Sahdol distt. at an altitude of 1066m & flows in westerly direction between Satpura & Vindhyan ranges. In the upper reaches the river has an average slope of 1 in 1000. The Basania project is located in the upper reaches of the river, about 248 Km from the source of the river. The area falls in the eastern part of the Satpura hill ranges and can be grouped into two distinct physiographic provinces namely the northern & central hill ranges and the southern ENE-WSW trending isolated hills. Trap rocks here generally form very big table lands at many places, which are called ‘dadar’ in local language. Hills with rounded tops are seen at places in the southern part of the area. Minimum elevation encountered is in the sourthern part of the area (400 m). Narmada is the major river which flows over the sourthern part of the area. Central & northern part are drained by Balainadi, Gaurnadi, Kolarnadi & Mahanadi. General pattern of drainage is dendritic to ill developed trellis pattern with ENE- WSW major axis. NH/CON/229 16 01/2004
uS'kuy gkbMªksbySfDVªd ikoj dkjiksjs'ku fyñ Preliminary Feasibility Report Basania HE Project 3 X 30 MW The area exposes almost horizontal Deccan trap flows & intertrappeans. So far, 14 flows have been delineated in 320 m thick lava pile, ranging in elevation from 400 M to 720 M above MSL. Flows are basaltic to doleritic in composition, sparsely to highly porphyritic and some times mega porphyritic in character. Out of 14 flows, 04 are compound pahoehoe, 03 are simple with pahoehoe affinities, 05 are simple and 02 are ‘Aa’ variety. Total lava pile can be classified into 04 groups on the basis of 03 marker beds, denoting quiescence period of volcanism. The flows at the basal part is designated as Mandla Group, followed by 0.5 to 2.5 m thick fossiliferous intertrappean bed. The second flow is designated as Kundam Group including megacryst bearing flow, pillow lava and red bole beds. The overlying 0.5 to 1 m thick intertrappean contain wood fossil. The third flow is designated as Majhgaon Group. It is followed by thin red boles and thin unfossiliferous cherty intertrappean horizon. The flow at the top is designated as Pipariya Group, consists of Aa flow with columnar joints. The stratigraphic sequence is given below:- Group No. of flows / thickness of pile Flow characteristic / NH/CON/229 17 01/2004 EL Location Pipariya 1/55 m ‘Aa’ (665-720 m) Pipariya, E&NE of Niwas Inter group horizon comprised of red boles & thin unfossiliferous cherty intertrappean. Majhgaon 5/125 m 2 compound pahoehoe 3 simple with pahoehoe affinity (540-665 m) Majhgaon Niwas Inter group horizon comprised of highly fossiliferous intertrappean, red boles, overlying megacryst. Kundam 4/70 m 3 simple, Kundam, Harduli
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Page 77 and 78: Installed Capacity Sl.No. Year 90 F
Page 79 and 80: Period Jul-89 Aug-89 Sep-89 Oct-89
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1848.94 Load Factor 39% Design Disc
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Drainage uS'kuy gkbMªksbySfDVªd i
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S.No. Name of Work Excavation/ Conc
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STATEMENT SHOWING IDC CALCULATION A
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UNIT COST OF ENERGY AT BUS BAR AT C
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BASANIA H. E. PROJECT, M. P. (3 X 3
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BASANIA H. E. PROJECT, M. P. (3 X 3
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Sl. No. DESCRIPTION UNIT QTY RATE (
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Sl. No. Description Qty. Unit Rate
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S. No. Description Unit Qty. Rate A
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S. No. Description Unit Quantity Ra
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S. No. DESCRIPTION WIDTH HEIGHT WEI
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1. Improvement/reconstruction of br
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DISTRIBUTION OF COST UNDER HEAD Q -
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S.No. Item Particulars Qty Rate Amo
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MW uS'kuy gkbMªksbySfDVªd ikoj dk
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BED LEVEL IN FEET 3600 1600 1200 40
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23°0` 22°15` 22°0` 80°15` 23°1
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1000 THICK DUMPED RIP RAP MDDL EL 4
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132KV BUS1 BUS PT-1 132kV BUS-II BU
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REPLY OF CWC OBSERVATIONS RECEIVED
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3. Adequacy of the Elevation of the
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also match with details of equipmen
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Satellite Remote Sensing Based Inpu
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BASANIA HEP_PFR - Ministry of Power

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