How the Screwpile Lighthouse Got Its Name

How the Screwpile Lighthouse Got Its Name (HM15S3)

Location: St Michaels, MD 21663 Talbot County
Country: United States of America

N 38° 47.25', W 76° 13.152'

  • 0 likes
  • 0 check ins
  • 0 favorites
  • 148 views
Inscription
A screw like this one was at the bottom of each of the seven pilings (legs) of this lighthouse—allowing the leg to be screwed down into the soft Bay bottom. It would have been much easier to simply drive the leg straight down into the mud, but screwing it in diagonally gave the lighthouse a more staple foundation.

The screws also helped keep the lighthouse secure in the winter, when ice froze around the pilings. When the tide rose beneath the ice, it tried to lift the pilings with it, but the screws were designed to hold them fast.

Screwpile lighthouses were a great innovation—they could be built out in the middle of the Bay, and could be seen by boats far from the shore. But winter ice remained their greatest enemy. Even beneath a frozen Bay, the tides rise and fall, lifting and lowering the ice above them. Over a long winter this continuous action can place enormous pressures on a lighthouse's slender legs. In all thirteen screwpile lighthouses were destroyed by ice and nearly every screwpile lighthouse suffered damage. Only four remain today. Of those, only one is in its original location, the other three—including this one—have been moved to land to preserve them.

Details
HM NumberHM15S3
Tags
Marker ConditionNo reports yet
Date Added Tuesday, September 9th, 2014 at 11:49am PDT -07:00
Pictures
Sorry, but we don't have a picture of this historical marker yet. If you have a picture, please share it with us. It's simple to do. 1) Become a member. 2) Adopt this historical marker listing. 3) Upload the picture.
Locationbig map
UTM (WGS84 Datum)18S E 394110 N 4293901
Decimal Degrees38.78750000, -76.21920000
Degrees and Decimal MinutesN 38° 47.25', W 76° 13.152'
Degrees, Minutes and Seconds38° 47' 15.00" N, 76° 13' 9.12" W
Driving DirectionsGoogle Maps
Area Code(s)410
Closest Postal AddressAt or near 100 North Ln, St Michaels MD 21663, US
Alternative Maps Google Maps, MapQuest, Bing Maps, Yahoo Maps, MSR Maps, OpenCycleMap, MyTopo Maps, OpenStreetMap

Is this marker missing? Are the coordinates wrong? Do you have additional information that you would like to share with us? If so, check in.

Check Ins  check in   |    all

Have you seen this marker? If so, check in and tell us about it.

Comments 0 comments

Maintenance Issues
  1. Is this marker part of a series?
  2. What historical period does the marker represent?
  3. What historical place does the marker represent?
  4. What type of marker is it?
  5. What class is the marker?
  6. What style is the marker?
  7. Does the marker have a number?
  8. What year was the marker erected?
  9. Who or what organization placed the marker?
  10. This marker needs at least one picture.
  11. Can this marker be seen from the road?
  12. Is the marker in the median?