I think it has to do with water temps. If I remember correctly, they need cold water more so than brook, brown and rainbows. The farmington is cold, but what other river/lake in CT is that cold ? Few, if any, thus does not justify the cost of raising in a hatchery to be stocked.

I did a cross country trip back in the day and caught cutthroat, goldens, apache and even dolly varden trout, twas awesome. Trout are the most beautiful fish out there..