Convoys carrying 16 modules which will become a new water treatment works will begin making their way to Invermoriston on Monday.
The works have already been assembled and pre-commissioned by Ross-shire Engineering at its specialised facility in Muir of Ord.
The innovative modular approach to construction being used was developed by the Highland firm via a long term partnership with Scottish Water.
Now the modules will make the 41 mile journey from Muir of Ord to the new site, located in forestry above the A82 just south of Invermoriston.
Convoys will be spread over three weeks, starting from Monday January 13, and timed to avoid the busiest times on the roads as far as possible. Each convoy will have a police escort and will make the journey via the A832, the A9 and the A82.
The new water treatment works is central to a a £21 million investment by Scottish Water, with its alliance partner Efficient Service Delivery (ESD), which will provide a single, improved water supply from Loch Ness to around 1250 customers in Fort Augustus and Glenmoriston.
It will also help the area cope with significant seasonal increases in demand for water.
ESD project manager Kelton Bennett said: “The delivery of the new water treatment works represents an important milestone in our work to provide a single, improved water supply to meet the needs of communities in the heart of the Great Glen.”