Registration is now open for the 10th annual PWTSC clean-up of the upper Occoquan River. To participate on the water using canoe, kayak, or jon boat, click here To participate at a cleanup site on land, click here On Saturday, April 20, 2019 from 9 a.m. until 2 p.m. (rain date April 27, 2019), Prince William Trails and Streams Coalition (PWTSC), a 501(c)3 organization, is conducting its 10th annual clean-up of the upper Occoquan River, from nine different sites along…