Holtwood, also known as McCall's Ferry Dam, is a gravity dam located in Lancaster, Pennsylvania along the Susquehanna River.
Wind
Humidity
Built in 1910, this hydroelectric structure stands at a height of 55 feet and spans 3,075 feet in length. With a storage capacity of 19,000 acre-feet and a maximum discharge of 800,500 cubic feet per second, Holtwood plays a crucial role in providing hydroelectric power and recreational opportunities in the region.
Managed by a public utility, Holtwood is regulated by the Federal Energy Regulatory Commission and undergoes regular inspections to ensure its safety and functionality. Despite being classified as a low hazard potential structure, Holtwood has a moderate risk assessment level. Although its condition assessment is not available, the dam meets industry guidelines and has an emergency action plan in place to address potential risks. With its scenic location and historical significance, Holtwood is a key contributor to the water resource and climate conservation efforts in the area.
As a significant landmark in the region, Holtwood not only provides renewable energy through hydroelectric power but also offers recreational opportunities for visitors. With its uncontrolled spillway and multi-arch core design, the dam showcases a blend of engineering excellence and environmental stewardship. The moderate risk assessment highlights the importance of ongoing monitoring and management measures to ensure the continued safety and efficiency of this vital water resource infrastructure. For water resource and climate enthusiasts, Holtwood serves as a prime example of sustainable energy generation and responsible dam management practices.
Year Completed |
1910 |
Dam Length |
3075 |
Dam Height |
55 |
River Or Stream |
Susquehanna River |
Primary Dam Type |
Gravity |
Surface Area |
2400 |
Drainage Area |
26794 |
Nid Storage |
19000 |
Hazard Potential |
Low |
Foundations |
Rock |
Nid Height |
55 |
Muddy Creek At Castle Fin
|
74cfs |
Pequea Creek At Martic Forge
|
63cfs |
Conestoga River At Conestoga
|
244cfs |
Deer Creek At Rocks
|
54cfs |
Susquehanna River At Conowingo
|
5060cfs |
Pequea Creek Near Ronks
|
29cfs |
| Location | Reservations | Toilets |
|---|---|---|
Camp Andrews
|
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Hmilton Ruins Outpost
|
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Jamestown
|
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Prospect
|
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Susquehanna
|
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Friar Tuck
|