This document is 360 pages long and is a year old but it does contain some interesting information regarding the next stage of PWEP.
Of interest was the option of two foundation types, which is due for installation this month. I wonder if that still stands?
I am thinking if it was option 1, a jackup barge on site would give it away and we would know about it already.
2.2.1 Proposed foundation installation
"Foundation installation is scheduled to be completed by December 2016 (Table 2.1). The Project is currently in the Preliminary Design Phase and, as such, design specifications have not been finalised. The following methods have been proposed for foundation installation:
Pile installation either by pile driving or drilling and grouting: the proposed pile installation will have maximum dimensions of 2.5 m with penetration of ~25 m into the seabed and protrude ~700 mm. The estimated timeframe for pile driving is ~24 hours over ~1-5 days for each pile installation with a maximum of up to three piles. Each foundation installation, involving drilling and grouting of the pile, has an anticipated timeframe of 5–10 days.
Gravity base installation will have proposed maximum foundation dimensions of 70 x 25 x 4 m. The foundations will be towed to site and de-ballasted to sink to the seabed with an approximate weight of ~3500 t and constructed from steel and reinforced concrete. Carnegie estimate 5–10 days for gravity base foundation installation per unit.
Additionally, on-site positioning and demobilisation of equipment required for foundation installation are each expected to take ~1 day and all installation methods are subject to suitable weather conditions. During installation a Temporary Notice to Mariners (TNTM) will be issued and all relevant personnel notified."
