PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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Chapter 17<br />
Technical specification for Clear Water RCC Sump & Pump<br />
House.<br />
17.1 Introduction.<br />
The project influence area considered under the project are divided under 13 zones<br />
including Shillong Cantonment area. Except one zone, viz. zone X<strong>II</strong> all the zones<br />
considered under the project are located at an elevation lower than the water<br />
treatment plant at Mawphlang rendering flow of water by gravity from WTP<br />
towards Shillong possible. For supply to this remaining one zone, booster<br />
arrangement is proposed to be installed at 6 th Mile, Upper Shillong which is about<br />
13Km from Mawphlang for lifting water via DI rising main to the main reservoir at<br />
Laitkor and thereafter for distribution to zone X<strong>II</strong>.<br />
17.2 Intent and requirement.<br />
The intent of this tender is to construct an RCC sump with pump house at 6 th Mile,<br />
Upper Shillong for the purpose of lifting the present and future requirement of<br />
water to zone X<strong>II</strong> where gravity flow from the water treatment plant is not possible.<br />
17.3 Scope of work.<br />
The scope of the work covers survey, design, engineering and construction of<br />
clear water RCC sump and pump house.<br />
17.4 For design of clear water RCC Sump. The following factors are to<br />
be considered.<br />
i) The clear water RCC sump is proposed to be constructed at 6 th Mile which is at a<br />
distance of about 13Km from the water treatment plant. The source of water is the zonal<br />
reservoir proposed to be constructed at 6 th Mile which is also a component under the<br />
contract.<br />
ii) The sump shall be designed to meet the ultimate requirement and shall have a<br />
capacity of 100 KL. At present 2 pumps are proposed to be installed and one additional<br />
pump will be added for future requirement.<br />
iii) The sump shall be circular and proposed to be constructed at the same level with<br />
that of the pumps house and shall have a height of not less than 3.0m to ensure pumps are<br />
installed with positive suction. The sump is to be constructed with RCC of M-25 grade<br />
concrete and HYSD/TMT bars for reinforcement.<br />
DTS : Detailed Technical Specification. Page 163
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