Saturday the 15th was a great day for a walk along the Discovery Trail. Partly sunny and calm; just a great day to enjoy being outside! We met several friends to learn something off the history of this area and early survey methods. Mark Gray presented the information while we walked and stopped and walked again. Mark is a member and active volunteer with the Chehalis River Basin Land Trust and spent many hours researching and locating maps and lidar. These graphics showed how the river might have looked [in the past, about 1882] over history, and today it looks very different. Activities of early loggers and farmers have changed how the river flows.
The historic river flows as shown by lidar and explained by Mark included many,
many side channels and river meanders. I would not have understood all the curving lines on the lidar without Mark’s interpretation! Mark had overlaid the maps with original survey data and explained how that data was created, which included getting to both sides of the river, around hills and large trees, etc. The Chehalis River once had several meanders in the 1 ½ mile that we walked; today the river has only one large curve in that area.
The south end of the trail is where the river turns north; this is controlled by the Lincoln formation—which led me to this link and (maybe) my next blog! http://file.dnr.wa.gov/publications/ger_ofr85-3_superconducting_super_collider.pdf
-Jan Robinson, Board President, April 19, 2017