Groff Mill, located in Lancaster, Pennsylvania, is a historic stone dam constructed in 1919 for recreational purposes along Mill Creek.
Wind
Humidity
With a height of 8 feet and a length of 100 feet, the dam holds a storage capacity of 54 acre-feet and covers a surface area of 18 acres. Despite its age, the dam is in good condition with a low hazard potential, as assessed during its last inspection in June 2017.
Owned privately, Groff Mill is regulated by the Pennsylvania Department of Environmental Protection and undergoes regular inspections and enforcement to ensure compliance with state regulations. The dam, built with a buttress core and masonry stone, serves as a popular spot for recreational activities in East Lampeter Township. It stands as a testament to historical engineering and continues to provide enjoyment for water resource and climate enthusiasts in the area.
While not rated for its condition assessment, Groff Mill remains a picturesque landmark in the region, offering a serene escape for visitors seeking to enjoy the beauty of Mill Creek and its surroundings. As a low-hazard dam with a rich history, it serves as a reminder of the importance of maintaining and preserving water resources for future generations to appreciate and enjoy.
Year Completed |
1919 |
Dam Length |
100 |
Dam Height |
8 |
River Or Stream |
MILL CREEK |
Primary Dam Type |
Stone |
Surface Area |
18 |
Drainage Area |
21 |
Nid Storage |
54 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
8 |
Conestoga River At Lancaster
|
138cfs |
Pequea Creek Near Ronks
|
30cfs |
Conestoga River At Conestoga
|
252cfs |
Pequea Creek At Martic Forge
|
65cfs |
Susquehanna River At Marietta
|
14000cfs |
Muddy Creek At Castle Fin
|
78cfs |