Farmington,

Tariffville (Route 189) to Highway 187 (Tariffville Gorge)

Usual Difficulty	II-III (may vary with level)
Length	1.5 Miles
Avg. Gradient	15 fpm
Max Gradient	40 fpm

Gauge Information

Name	Range	Difficulty	Updated	Level
FARMINGTON RIVER AT TARIFFVILLE, CT.
usgs-01189995	1.50 - 5.50 ft	II-III	19h10m	2 ft (rc= 0.1 )
	Upper limit for best boatability uncertain. Please help your fellow boaters with a comment or report.

River Description

Directions, courtesy of indoKrOniK on Boater Talk:

North of Hartford on Interstate 91 is a 4-lane hwy (Route 20) that goes to Bradley International Airport.

Follow that to the last exit before the airport (Granby).

The exit will dump you right onto a road so you don't turn at all off the ramp, just keep driving.

Turn left at the first road that is a number (Route 187). It's about 1.5 -2 miles (guess) down the road. There is a savings bank on the far left corner of the intersection and the intersection has a traffic light.

Drive another few miles and make a left on Spoonville Rd.

Make an immediate right and follow for a few miles until you just dead end at a parking lot with boating vehicles.

dhs says, also on Boater Talk, "There is more than one playspot at Tville, but most people work the bottom hole because its so easy to get back up to. Levels make a big difference as to where you play and there are several holes and one really nice wave /hole called Babylon {where I have seen a few nice blunts and loops thrown}.
"When the levels are 4 feet and above there are some incredibly wild rides to be had in the 'Hole Section' {the rapid that most people seem to think of as Tville} as well as other sections of Tville, with Kennebec-size waves to surf, spin on and wave wheel thru. I've even managed a kickflip over these."

Check out this article from the AW Journal archives.
Check out the river description at the Farmington River Watershed Association website.