Location: Yandicoogina near Newman, WA
Client: Rio Tinto
Duration: October 2020 – December 2020
Our first in-pit tailings storage facility. OD400 (DN400) SDR7.4 PN25 PE100 HDPE pipelines were flanged every 40m up until the 600mm diameter culverts installed. The mainlines included 4no. slotted spigot droppers over the pit wall and its benches, approximately 50m. Planning of pipe deliveries on extendable trailers minimised the number of trips requiring escort through the Autonomous Haulage System (AHS) pit.
- Supply and install DN600 CSP culverts;
- Excavate trenches;
- Cement stabilised fill for bedding and backfill;
- Road pavement construction;
- Reinstate haul road;
- Trim wearing course;
- Construct windrows;
- Place rock protection;
- Construct viewing platform;
- Install signage;
- Supply, polyweld and install OD 400 (DN400) SDR7.4 PN25 PE100 HDPE with ANSI300 backing rings;
- Hydrostatic pressure test;
- Install hydraulic-actuated and manual handwheel knifegate valves, air valves;
- Cut and weld to tie-in;
- Supply and install 2no. electromagnetic flow meters/transmitters;
- Supply and install 1no. solar-powered telemetry skid;
- Decommission existing valves.
