Heritage Cases

Based on the design the proposed bulk line is approximately 2.94km. The details of the proposed project is as follows: 1. Re-route all or most of the incoming outfall sewer with a new 1,5m diameter pipe around the village (see layout) and connect to existing parallel pipelines. a. Approximate length = 1150 b. Proposed Material: A combination of concrete and structured HDPe pipes. c. Anticipated length above ground = 750 d. Anticipated length underground = 400 e. Anticipated height above ground = 2.6m f. Anticipated max depth of excavation = 3.0m g. New manholes = 11 2. Due to the space available a small section of the existing line must be re-routed to provide space for the new parallel 1.8m diameter line. a. Length of deviation = 130 m with 3 new manholes b. Proposed Material: A combination of concrete and structured HDPe pipes. c. Length of new pipeline = 720 3. Due to possible capacity and elevation problems in future a new parallel line is also included alongside the 2 existing parallel lines. a. Length of new pipeline = 335 b. Proposed Material: A combination of concrete and structured HDPe pipes c. New manholes = 3 DESIGN CRITERIA Design Standards The design criteria are in accordance with the Guidelines for the provision of Engineering Services in Residential Townships and can be summarized as follows: Due to no clear design criteria being available for outfall sewers the following principals has been used for the preliminary design of the proposed outfall sewers. Actual design figures will be dealt with in the final detailed design report.