235-2021 - 2021 Sewer Inspections

D2. SCOPE OF WORK
D2.1 The Work to be done under the Contract shall consist of inspections and re-inspections with portions of cleaning within the Combined, Wastewater, Land Drainage, Storm Relief and Interceptor sewers and their corresponding manholes and control structures located at various districts throughout the City of Winnipeg. This Work is for the purpose of obtaining internal video and supplemental Laser and Sonar inspections to observe and record structural, construction, operational and miscellaneous defects and features to enable condition assessment and apply rehabilitation treatment assignments, while assessing thoroughness of sewer cleaning operations undertaken under this Contract.
D2.2 The major components of the Work are as follows:
(a) Interceptor Sewer Inspection Work Program
(i) CCTV Inspection of all Interceptor Sewers.
(ii) Laser Inspection of all Interceptor sewers 900mm diameter and larger.
(iii) Sonar Inspection of all Interceptor sewers 900mm diameter and larger.
(iv) Sonar Inspection of the Fort Garry – St. Vital Interceptor Siphon Crossing
(v) Inspection of all manholes and control structures.
(vi) Cleaning of all combined sewers smaller than 900mm.
(vii) Cleaning of all wastewater sewers smaller than 450mm.
(viii) Cleaning of all manhole and structures where the host pipe has been cleaned.
(b) Land Drainage Sewer Inspection Work Program
(i) CCTV Inspection of all Land Drainage Sewers.
(ii) Sonar Inspection of sewers 900mm diameter and larger.
(iii) Inspection of all manholes and structures.
(iv) Cleaning of all Land Drainage sewers smaller than 900mm.
(v) Cleaning of all manholes and structures where the host pipe has been cleaned.
(c) Re-Inspection Work Program
(i) CCTV Inspection of all Re-Inspection Sewers.
(ii) Laser Inspection of all Non-Circular and Circular sewers 1350mm and larger.
(iii) Sonar Inspection of all Non-Circular and Circular sewers 1350mm and larger.
(iv) Inspection of all manholes and control structures.
(v) Cleaning of all combined sewers smaller than 900mm.
(vi) Cleaning of all wastewater sewers smaller than 450mm.
(vii) Cleaning of all manhole and structures where the host pipe has been cleaned.
(d) Storm Relief Sewer Inspection Work Program
(i) CCTV Inspection of all Storm Relief Sewers.
(ii) Laser Inspection of all sewers 1350mm and larger.
(iii) Sonar Inspection of all sewers 1350mm and larger.
(iv) Inspection of all manholes and control structures.
(v) Cleaning of all Storm Relief sewers smaller than 900mm.