Mill Creek buffer 3

Mill Creek buffer 3

Volunteers plant trees along a creek in Lancaster County, Pa.

Volunteers plant trees, and install stakes and protective tubing, along a stretch of Mill Creek in Lancaster County, in June 2017. In a formation called a mud sill, logs were installed along stream banks to protect them from erosion, and fencing was installed to prevent grazing cattle from entering the water.

IMAGE: Sarah Xenophon / Penn State