Proposals are hereby invited for the appointment of supplier for supply and delivery of concrete aggregates (19 mm stones and sand) as required for the construction of the Tzaneen Dam. Scope: The work shall comprise the following: - The construction of a reinforced concrete labyrinth spillway on the lowered Spillway crest section to a new crest by 3 m high. - Raising of the concrete NOC tongue wall sections, - Changing the brickwork construction of the inlet works control house to allow impermeability for an additional 3 m water depth. - Raising the embankment by 2, 4 m high. - Revision of the energy dissipation measures to form an impact slab more suited to the discharge pattern of a labyrinth spillway. This work must be done without interfering with the day-to-day operation of the dam. The Bidder will be required to perform the following service as part of this contract: - Supply and delivery of Concrete aggregates (19 mm stones and Sand) for the duration of 12 months to Tzaneen dam raising Project. Please confirm the closing time. (投標 №88947553cn)