...generating surplus power that it will be sold into the Alberta grid...any idea what this could be worth?/ olisandy

The simple answer is Zero. Cost of selling the surplus power to the grid will be higher then the revenue.

There maybe other benefits of having the Co-Gen which are impossible to quantify in dollars terms.

Some background:

Recently commissioned 13.1 MW Co-Gen is possibly Caterpiller STAC 100 type (or similar) which can generate 11 to 13.8 MW depends on the Ambient (outdoor) temperature.

Since Co-Gen is suppling 8 MW power to Algar the excess power of 4.85 MW (as per CLL) can be redirected to Power GRID. POD1 is supply from the GRID and is not protected from the unexpected shut in.

After the Algar extension Co-Gen nominal power will not be sufficient to supply the Algar extension and will not contribute any power to the grid.

At 13.1 MW Co-Gen uses 3650 GJ/d of Natural Gas.

To export 4.85 MW per day you have to burn 1351GJ/d.

Alberta power prices dropped to eight-year low.

Let it assume that CLL will get average Alberta Power Pool rate for their Co-Gen power of $35.83 par MW-h.

$40 per 1 MW-hour = $960 per day.

Co-gen revenue $960 X 4.85MW = $4656 a day

NG cost 1351GJ/day X $6 (commodity + delivery) = $8106

As you can see CLL Co-Gen will be selling the Power with daily loses of $3450 .

In addition to NG there are other cost to keep Co-gen running at 24/7.

As en example: salaries, maintenance and overhaul every few years + amortization.

Hope this helps.