PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

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Motor starting arrangements: Individual Motor starters/panels for 415 volt 3 Phase 50 Hz Motors shall be as below:- For Squirrel cage motors up to 3.7 kW : Direct-on-line Squirrel cage motors above 3.7 kW to 38kW : Star-delta starters For motors above 38kW to 75kW : Auto transformer For motors above 75kW : FCMA Starters Each control panel/starter shall incorporate isolator, HRC fuse conductors, timing relays, overload relays, single phase preventor, Hour meter (for pump running hours) etc. appropriate for the scheme of control. Contactor rating for each motor shall be at least 25% higher than the full load current of the motor and contactor shall comply with the requirements of IS:13947 Part:4 Sec-1 and IS:10118. Reversible starters shall be provided wherever necessary. GTS : General Technical Specification. Page 156
Chapter - 16 Technical specification for Raw water intake, pump house & approach bridge and Raw water intermediate RCC Sump & Pump house. 16.1 Introduction. Shillong is the capital of the State of Meghalaya. The supply of water to Shillong is from the GSWS Water Works at Mawphlang located about 24 Km away. The source of the water works is mass gravity concrete dam constructed across the river Umiew near Mawphlang about 6.5Km from Mawphlang under GSWSP (Phase I & <strong>II</strong>). A Twin RCC Intake well of 8m internal diameter and 36m in height was constructed with pump house at the top by the bank of the river in 1985-1986. Each of the twin intake well is connected with 2 nos. inlet M.S. pipe of 600mm at 2 different levels for drawing of water from the run-off the river into the well for pumping by 6 nos. vertical turbine pump installed in pump house. The pump floor level, discharge gallery and R.L. of sluice gates for entry of water into the intake well were designed keeping inview the HWL on post construction of dam proposed to be taken up at a later stage. The mass gravity concrete dam was subsequently taken up for construction in 1997 and completed in 2003. Following the construction of dam and consequential rise in water level, the original 2 nos. MS inlet pipes to each of the twin intake well were closed allowing water to enter into the intake well through the sluice gate fixed at higher level in the intake well wall. Presently about 51.30 MLD is drawn from the dam in 2 stages of pumping system for supply to Shillong after treatment. 16.2 Intent and requirement. The intent of this tender is to construct additional RCC intake well with pump house and an approach bridge of about 40m in the vicinity of the reservoir and adjacent to the existing intake well including construction of intermediate stage RCC sump and pump house for the purpose of drawal of additional quantity of water to meet the increasing demand for the present and future requirement. DTS : Detailed Tender Specification. Page 157
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Government of Meghalaya Public Heal
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1.1 Materials. Chapter 1 General Te
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IS: 1786 - 1985 Specification for h
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IS: 1500 - 2005 Methods for brinell
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Cement bags brought to the site mus
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Laying : The cement, sand and stone
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1.6 Reinforced Cement Concrete. All
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Expansion joints. Expansion joints
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1.16 Conservation water. Special Co
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oads, protection to existing underg
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the relevant standards and codes in
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1.33 Demolition. Before commencing
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Motors, gearing, transmission, elec
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Construction Camps :The Contractor
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2.1 Description. Chapter 2 Submitta
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3.1 Clearing site. Chapter 3 Site p
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Chapter 4 Dismantling 4.1 Dismantli
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5.1 Description. Chapter 5 Earth Wo
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The trench shall be so dug that the
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5.12 Excavation for appurtenance. E
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5.16 Caution cum information boards
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f) Before and during the backfillin
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6.1 Brick work. Masonry Mortars: Pr
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6.4 Scaffolding. Scaffolding shall
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Half or cut bricks shall not be use
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7.1 Concrete. General: Chapter : 7
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) Gradation: (I) Unless otherwise d
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Dropping of concrete from an excess
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Cement: Cement shall, whether suppl
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Coarse aggregate shall be piled in
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Grades of concrete: The concrete sh
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Uniformity of mix: Concrete shall b
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Vibration: Vibrators shall be inser
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Jointing: The face of a constructio
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8.1 Material. Chapter 8 Form Work A
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8.3 Removal of Forms and Shoring. F
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9.1 General. Chapter : 9 Reinforcem
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9.6 Dowels. Where and as designated
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(viii) Increased cover thickness sh
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10.1 Definitions. Chapter : 10 Plas
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The fine aggregate for cement morta
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Roughness: Smooth surfaces of in-si
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In suspending the work at the end o
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11.1 Transportation. Chapter - 11 L
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At the end of each day, the end of
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Where joints are left uncovered unt
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11.9 Flanged joints. Flanged joint
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A. Sluice valves 12.1 General. Chap
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12.6 Lubrication. All the points wh
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13.1 Fixing of Sluice Valves. Gener
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Preparation: The air valves and the
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14.1 Pressure gauges Material: Chap
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Chapter - 15 Electrical Works and P
Page 107 and 108: 7. The bidder should enclose along
Page 109 and 110: 15.9 Approval by fire insurance aut
Page 111 and 112: All spare contacts and terminal of
Page 113 and 114: Painting: The panels shall undergo
Page 115 and 116: Auto Transformer Starters : The aut
Page 117 and 118: Contactors: The three pole contacto
Page 119 and 120: While removing the cable from the d
Page 121 and 122: Testing of Cables: Once the cable i
Page 123 and 124: Point Wiring: Point wiring shall in
Page 125 and 126: Control at point of entry supply: T
Page 127 and 128: A conductor shall be carried in an
Page 129 and 130: 5 Amps and 15 Amps socket outlet sh
Page 131 and 132: All outlets such as switches, wall
Page 133 and 134: Outdoor Luminaire: The luminaire sh
Page 135 and 136: All earth wires and earth continuit
Page 137 and 138: The capacitor bank may comprise of
Page 139 and 140: 15.22 Pumping Machineries. Applicab
Page 141 and 142: Iron and steel are in general to be
Page 143 and 144: Workmanship: Workmanship and genera
Page 145 and 146: On removal from the galvanising bat
Page 147 and 148: They shall be efficiently lubricate
Page 149 and 150: Codes and standards: The design, ma
Page 151 and 152: The design of bearing should be suc
Page 153 and 154: Base plate: The common base plate f
Page 155 and 156: The commissioning tests shall be pe
Page 157: Motor Winding: Motor winding shall
Page 161 and 162: vii) This region has experienced a
Page 163 and 164: 16.7 The reduced level at different
Page 165 and 166: Chapter 17 Technical specification
Page 167 and 168: Chapter 18 Technical Specification
Page 169 and 170: (b) Pits for joints : When welding
Page 171 and 172: All excavated materials shall be th
Page 173 and 174: Supply of paints with approved qual
Page 175 and 176: shall be lowered into the trench by
Page 177 and 178: 2. Protective devices, such as reli
Page 179 and 180: Education of crew members as to the
Page 181 and 182: The anchors provided at the mid-poi
Page 183 and 184: Chapter 19 Technical specification
Page 185 and 186: including laying of the Rising Main
Page 187 and 188: The pumps shall be of non pull out
Page 189 and 190: 5. a) Centre to centre spacing (bet
Page 191 and 192: The pump TBH shall be calculated by
Page 193 and 194: Bidder for solo and parallel operat
Page 195 and 196: i) Seal ring/ earing ring : Materia
Page 197 and 198: 4. Detail Particulars : The technic
Page 199 and 200: The Bidder shall furnish with the o
Page 201 and 202: 19.14 Starters : In selection of st
Page 203 and 204: Pressure gauge (IS 3624): The deliv
Page 205 and 206: Bidder shall be provided with one p
Page 207 and 208: 19.23 Valves & Specials for Pump in
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19.30 Equipment transfer trolley. O
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Each installation shall include the
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Fixtures shall be fully wired up to
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Exhaust Fan: For ensuring open vent
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Miscellaneous electrical safety dev
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For long run, junction/pull boxes s
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Foundation & Civil Works : Equipmen
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e) Exhaust fan: For ensuring open v
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Chapter 20 Technical specification
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It is the responsibility of Bidder
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In the design selection of pumping
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Bearings : Has been detailed elsewh
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Chapter 21 Water Treatment Works. 2
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Sterilisation : For sterilisation o
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ii) Agitator drive comprising elect
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xx) Air blower of 500 cfm capacity
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The contractor shall assume full re
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Filters House and associated plant
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Control room & laboratory : The var
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Sl. No. Parameter 28. Selenium (mg/
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The chlorinators shall be arranged
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21.12 Filtration Works. The works t
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21.16 Filter media and charging. Th
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Slow Start : Following cleansing op
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The gears between the driver and dr
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Special foundations in poor soil :
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Protection of property : Trees, shr
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22.6 Pipe laying. Laying of pipes u
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i) By Hacksaw : Hand or power opera
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ii) Transportation : Pipes should b
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iv) It is prudent to begin testing
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The contractor shall assume full re
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Though the wall thickness of the pi
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Butterfly valve for individual pump
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Chapter 24 Technical Specification
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Chapter 25 Technical specifications
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Erection/laying/hoisting, fitting a
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A. Electro-Mechanical Chapter 26 Ve
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PACKAGE : I Bid Document VOLUME : II - Public Health Engineering

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