laying of sewerage network including construction of property connections and other related works , condition assessment of existing main trunks, branch and leteral sewer connecting to main trunk of sewerage network, preparation of drawings and reports of condition assessment including survey, designs and preparation of drawings for laying of main trunk, branch and leterals sewer, construction and commissioning of main trunk, branch and leterals as per designs and drawings starting from a.b. road, rama ji ka pura to sagartal chauraha, gwalior within the limits of gwalior municipal corporation. operation and maintenance of main trunk to be laid under this contract during the defect liability period of one ( 01 ) year.