Darwin Region - Maningrida Access Road - Gravel Resheet Various Sections Between CH 20km and 31km

A general outline of the work to be carried out under the Contract comprises of the reformation and re-sheeting of Maningrida Access Road to re-construct the existing 9.0m wide gravel pavement, as per Standard Drawing CS3609-Typical Cross-Section for Unsealed Rural Roads. Works also include reinstatement of table drains, offlet drains and table drain blocks.

Works include:

·         Win existing sound material to reform a 150mm thick Sub-Grade and compact to 95% MMDD (3m wide traffic lanes with 1.5m shoulders). Maintain road alignments.

·         Import, place and compact 200 mm thick type 2 or 3 gravel basecourse compacted to 95% MMDD, free of organic matter.

·         Provide trapezoidal shaped flat bottom drains a minimum of 400mm depth below natural surface level and ensure drains are compacted and free flowing.

·         Compact table drain blocks and offlets to 95% MMDD ensuring offlets are effective and provided at appropriate intervals.

·         Provide a finished gravel surface trimmed and tightly compacted, conforming to the standards in the CONFORMANCE TESTING section. Maintain pavement dimensions in accordance with drawing CS3609.

·         During the works, provide the final quantities for each pit to DIPL Project Manager.