Today (Tuesday Dec 9th) is Colorado Gives Day. In addition to being able to donate to American Whitewater (and many other worthy causes), you can donate to help fund the Poudre Whitewater Park (which is approved by city council)!
For the Poudre Whitewater Park hit up this link:
https://www.coloradogives.org/NoCoGives/index.php?section=organizations&action=newDonationToFundraiser&fwID=7582
For American Whitewater this one:
https://www.coloradogives.org/index.php?section=organizations&action=newDonation&fwID=36630
Donations to either organization will benefit from the Colorado Gives Day statewide $1 million incentive fund, increasing the value of your donation, as well as being tax deductible.
Info on the park is also available at http://poudrewhitewaterpark.com