Kent Falls State Park
At Kent Falls State Park in the Litchfield Hills Region of CT, Falls Brook drops in a series of waterfalls 250′ to the Housatonic River. There is a covered bridge and a short paved walk to the base of the falls. The walk to the top has hand rails, but is described by some as steep. There are only 10 available parking spaces, including some accessible. The bathrooms are accessible. Here is a description of the park and its geology from stateparks.com. Out-of-state fee is $15.
Here is their website. Phone 860-927-3238 Map
The 1/4 mile paved trail to the falls is described as wheelchair accessible on the website. The trail along the steam to the top is steep in places.