Drones pinpoint buried treasure in the form of Confederate blockade runners that ran aground in Charleston and have since disappeared under shifting sands

Archaeology team at work on beach (SCIAA), map of wreck sites (U.S. Coast Survey),.wreck of Celt (Library of Congress)

As the Union’s nautical noose tightened around Charleston, blockade runners daring to bring vital goods to the Confederacy typically  took the shortest route into the harbor, sailing close to Fort Moultrie on the southwestern tip of Sullivan’s Island.

But first, enterprising captains likely weighed the risk/reward ratio of using Maffitt’s (or Beach) Channel to enter or leave the besieged city.

Pros: Straighter shot into the harbor and protected by a string of Confederate batteries along Sullivan's Island to keep Union blockaders at bay;

Cons: Tricky to make the passage into the harbor due to a jetty off Fort Moultrie that created unique currents and counter-currents. 

And there was another downside, says South Carolina underwater archaeologist Jim Spirek.

“100-pdr Parrott and other shells heading your way if spotted by the Union batteries on Morris Island after the fall of Battery Wagner.”

Click map to see Main Channel, Battery Wagner and Fort Moultrie area (U.S. Coast Survey)

So it’s no surprise numerous blockade runners ended up littering the shore or shallow waters. Some were sunk by enemy fire while others intentionally (or not) ran aground.

While the whereabouts of many are known, the state wanted to know more about four that are no longer visible, Spirek told the Civil War Picket. His office this week announced it used drones to conduct a survey of the “forgotten” wreck sites.

“Because Sullivan’s Island has been marching steadily southward in the area around Ft. Moultrie since the construction of the Charleston Harbor jetties, what once was water for ships to wreck in is now dry land,” said a social media post.

“The remains of these vessels are now buried deep below the beach and adjacent woodlot. Our drone was able to fly over the rough coastal terrain with its attached magnetometer, and detected the magnetic anomalies of two (or three) of the four historically recorded wrecks. Knowing the precise locations will help to preserve our knowledge of this part of Charleston’s history for future generations.”

Archaeologists believe they have located the “magnetic anomalies” of the Celt and the Beatrice or Flora (or both). The blockade runner Presto did not show, but is believed to be buried, like the others, below about 5 feet of sand. (At right, a jetty near Fort Moultrie is highlighted)

“The situation of shipwrecks appearing and then disappearing again is very typical of this type of sandy shoreline,” Civil War naval expert Andy Hall told the Picket. “Wrecks come and go (seemingly) as alternate cycles of erosion and accretion expose and rebury them."

The announcement was first reported by McClatchy News.

Engineers moved to keep Ft. Moultrie from eroding

Spirek, other archaeologists and historians have studied harbors along the Atlantic Coast and forces that present opportunities and challenges for shipping.

Charleston Harbor is behind Fort Moultrie fortifications in this NPS photo

I came across a fascinating article by local historian Nic Butler while researching this post. Entitled “Navigating the Bar of Charleston Harbor: Gateway to the Atlantic,” the piece describes shifting sandbars, silting and dangerous currents. Dredging, skilled captains and beacons countered some of the threats.

“Thanks to the construction of an artificial channel through two massive stone jetties, South Carolina’s principal port continues to flourish,” Butler writes.

The federal government got involved in safeguarding navigation in the first half of the 19^th century, when Fort Moultrie was endangered because of severe erosion. Works on the jetties and dredging began. Capt. Andrew Bowman of the U.S. Army Corps of Engineers built a jetty and breakwaters off Fort Moultrie to help stave off erosion.

But the Bowman and North Charleston jetties also had a negative effect, building up sand around them and reducing the depth of water ships could work with.

During the Union blockade, multiple ships ran aground off Sullivan’s Island as they traversed Maffitt's Channel (named for Rebel commerce raider John Newland Maffitt, right).

“Based on geo-referencing an 1865 nautical chart that marked the location of shipwrecks, obstructions, etc. in and around the harbor onto the modern landscape, (the evidence) suggested that four blockade runners were now buried on the beach,” said Spirek.

These four blockade runners met their doom here

The state’s Maritime Research Division this fall deployed drones over beach areas near Fort Moultrie. They were equipped with magnetometers.

Survey looked for Celt, Presto, Beatrice and Flora, mislabeled as Flamingo (SCIAA)

“The magnetometer detects the earth's ambient magnetic field and we use the tool to detect fluctuations, or anomalies, in the field caused by ferromagnetic metals, and in this case, three large iron-hulled blockade runners and one wooden-hulled,” said Spirek, adding no pieces of wreckage were found. “The Celt was reportedly last seen in the early 1980s.”

Below is a closer look at each of the four blockade runners. It's important to note that Union forces seized Morris Island in September 1863, allowing them to fire long-range artillery at vessels approaching Charleston

Celt: The steamboat was lost Feb. 14, 1865, when it tried to leave Charleston Harbor. Celt had run ashore near the breakwater at Fort Moultrie several days before the evacuation of the harbor by Confederate forces. “Inspection by the Union navy after the Confederate evacuation found a valuable load of cotton aboard, of which 190 bales were subsequently recovered and sent north, with the remainder to follow,” says a 2012 report for the American Battlefield Protection Program.

Hall, in his Dead Confederates blog, wrote this about the Celt after examining a Library of Congress photo (above) of its wreckage:

“There’s some interesting detail in the photograph that hint at the vessel’s origins as a local craft built under the exigencies of wartime. Celt has two engines that, while partially submerged, appear to be arranged as in a Western Rivers boat, and the valving shown looks to be almost identical. Such engines were reliable and simple but not overly efficient. They also operated under very high pressure compared to most seagoing ships, and so may have required a more robust set of boilers. Similarly, the paddlewheels are of very simple construction, with wooden arms and fixed floats (paddle blades). As with the engines, this is a very basic design, easy to build and maintain, but not efficient and somewhat coarse by shipbuilding standards of the time.”  

Interesting, a second shipwreck appears to be in the photo's background.

Beatrice: This iron screw steamer was lost on Nov. 27-28, 1864, when it came under heavy Federal fire and grounded on Drunken Dick Shoal while it was approaching the city. A local newspaper, the Charleston Mercury, summarized what happened: Bound from Nassau, the Beatrice had grounded on the beach of Sullivan’s Island during a fog earlier that morning. The steamer on attempting to enter the harbor was surrounded by Union picket barges which kept up a constant fire of grape and musketry on the vessel. The captain and eight of the crew to Battery Rutledge just as Union sailors boarded the vessel. Thirty of the crew were unaccounted for and thought captured.

Flora: The recent survey suggests the remains of the Beatrice and Flora might be next to each other (image above of magnetic field at that area, Maritime Research Division). Flora, a sidewheel steamer, grounded on Oct. 22, 1864. The crew was pursued long before reaching South Carolina and had to dump its cargo to speed away. Things really became hairy as it approached Charleston. “Passing the inner picket boats the vessel grounded in shallow water on the south side of Beach Channel. Stuck fast and impossible to refloat, the steamer was spotted in the daylight and the Union batteries on Morris Island began shelling the vessel,” according to Spirek. (Flora was mistakenly called Flamingo by the Union navy.)

Presto: The Scottish-built sidewheeler struck the wreckage of the Minho off Fort Moultrie on Feb. 2, 1864. It ran ashore while trying to enter the harbor. Federal monitors fired up the Presto, and Confederate batteries answered. By 1 p.m., the mainmast was cut away and the vessel was in flames. Several shells passed through below the waterline and most likely damaged machinery and cargo. The wreck was bombarded for a couple of more days causing the vessel to burn to the waterline. Confederate troops later salvaged sardines, jellies, fruit and liquor.

“I'm not sure why we didn’t locate Presto, as I know that it isn’t in the water,” said Spirek. 

At high tide, most of the Celt would be underwater, but the Beatrice/Flora would still be dry, officials said. Most of the Celt appears to be buried in the intertidal zone although the forward end of the wreck would still be under land rather than submerged at high water,” said Spirek.

Safeguarding, but no excavations planned

Summarizing the latest drone surveys, the archaeologist said the aim was to determine the presence or absence of the blockade runners.

Portion of Bowman's Jetty remnants with buoy (Courtesy A Civil War Traveler)

“Back in 2001 and again in 2009, we had undertaken marine remote-sensing operations to locate these four and other blockade runners in the water. While detecting several adjacent to Bowman's Jetty, we did not appear to locate the four, which gave us the idea that they were now buried under the accreted beach.”

There are no plans to conduct excavations of the presumed sites. 

“Now that we know the approximate positions of the two or three wrecks, we want to fly over them in a single flight to get a nice magnetic record of each one. We'll enter the information into the State Archaeological Site Files for record-keeping purposes and then just monitor the sites for any changes, such as erosion that may uncover portions of the wreck.” 

Search area and shifting shoreline (SCIAA-Maritime Research Division)

CSI: Nashville goes Civil War. Police 3D scanners and drones help plot trajectory of bullets fired on Sunnyside Mansion during battle

A mosaic shows likely trajectories of bullets fired by Union troops (MNPD)

What do police crime scene investigators and archaeologists have in common? It turns out, a lot.

Both take extreme care with evidence. They create detailed notes and photographs, make measurements and diagrams, then document and analyze the data.

These skill sets came into play when the Metro Nashville Historical Commission partnered with the Metropolitan Nashville Police Department to study two unoccupied log structures at Sunnyside Mansion in Sevier Park.

They wanted to solve the mystery regarding embedded bullets and holes discovered earlier this year in the cabin walls. The 44 “defects” – bullets, holes and chips – were associated with the December 15-16, 1864, Battle of Nashville, a significant defeat for the South.

Nashville police photographs of bullets, defects and removed projecticle

For Adam Fracchia, archaeologist with the historical commission, the ballistics project has provided an opportunity to learn more about the battle and its impact on the mansion. The house -- situated between battle lines -- was occupied for a time by Confederate pickets. Advancing Union troops fired upon Confederates in the log structures – made of stout cedar -- and used the residence as a hospital.

Sunnyside Mansion, the headquarters for the commission, has been undergoing an extensive restoration.

“I went and looked at the building and I noticed the bullet holes,” said Fracchia, who found more upon inspection. A forensics colleague suggested he reach out to the police department. “We wanted to get a (look at bullet) trajectory and where they were fired from.”

For Nashville police, the partnership was an excellent way to further test their FARO 3D scanners, which were used in the investigation of the 2020 Christmas Day bombing in the city. The scanners take 360-degree measurements and capture other details from a crime scene. (Photo courtesy of FARO Technologies)

Taking advantage of modern technology, police merged the scans with images they took by drones to make a mosaic of the mansion – which was built in 1852 – and show likely bullet trajectories and direction.

The project was only the second time that the department combined FARO and drone data, said Officer Douglas Belcher of the crime scenes detail.

“This gave us a great opportunity to test the technology we have and we think it did very well,” Belcher told the public during a July 13 presentation in the visitor center at Fort Negley, a large Union defensive fortification.

Another disastrous battle for Confederates

Nashville fell to Union forces in early 1862, relatively early in the Civil War. Tennessee was a strategic location for the Northern army and it built defenses in the capital.

Following a disastrous loss at the Battle of Franklin in November 1864, Confederate Lt. Gen. John Bell Hood moved upon Nashville, digging in below the city. Federal Maj. Gen. George Thomas attacked about two weeks later, sending Hood’s battered army off the field on Dec. 16.

The property now in Sevier Park is in the middle (click to enlarge map)

It has long been known that dozens of bullets, including Minie balls, were left on the porch door and columns on the big house at Sunnyside. Fracchia says you can still see evidence today.

The bullets and bullets in the log structures were found in February as restoration work reached that area on the north side of the house.

Until the damage was found, officials did not know whether the structures might have been elsewhere on the property before being moved to the house. Fracchia theorizes they may have been used as a kitchen or other ancillary purposes. Evidence of cabins for enslaved persons has not been found.

The north face in the 1980s and now (red is the area of study)

By the time of the Civil War, log structures were not fashionable and siding would have covered them, the archaeologist said. “The bullets likely went through the siding and they probably replaced the siding and the bullets were covered up.”

Fracchia said officials don’t have detailed descriptions of what happened on the property during the battle, but they believe Confederates must have been a significant target because of the number of bullets and holes. They eventually were forced to retreat.

Siding still covered the buildings when restoration began. “The more siding we took down, the more we found,” Fracchia said.

Crime scene unit logs entry points with rods (MNPD)

Old school and high tech meet

The police crime scene unit’s work at Sunnyside Mansion wasn’t all fancy gadgets. Officers did old-fashioned work first, marking and photographing the “defects” and using handheld rods to help determine trajectory and origin. An angle finder helped plot direction of impact – from the “leading edge” of the bullet. All of this information, including labeling of the defects, was used to complete the analysis.

“The goal is we want to determine origination. We are trying to figure out where the bullet came from,” crime scenes investigator George Bouton told the Fort Negley audience. “Bullets are predictably unpredictable,” he said. Flight paths are dynamic, including the effects of gravity on trajectory.

Police found and marked 44 bullet "defects" (Image MNPD)

Fracchia told the Picket that at some point after the battle, someone had chiseled out some of the bullets before the siding was replaced. “Nobody in active memory knew there were bullet holes in that wall.”

The archaeologist said a total of seven bullets were embedded in the two log structures. Most remain in the larger of the cabins. The smaller cabin, unfortunately, had to be taken down after the police examination because of its poor conditions. The logs have been kept.

The presentation included photos of a three-ring Minie ball and a Williams cleaner bullet.

“We are assuming they are Union bullets, given they were coming from the north, and fits the battle.” Some of the shots fired upon the mansion also came from the northwest.

The two embedded bullets mentioned by police are soft and burrowed themselves into the cedar. They are fairly well lodged in there, Fracchia said. “We don’t know exactly how far they were fired from.”

Officer Steven Jones said the logs had the density of railroad ties. “So it was extremely good cover.” He said most of the bullets were likely .40- or .50-caliber. "It seems to be a heavy concentration of fire in one area.” 

While Sunnyside Mansion is not a crime scene, it was an interesting opportunity for the police department to employ old skills and new technology.

“The last time a human touched this was in 1864,” said Bouton. “It has been that long. It is still right there where it ended up.”

Maps of Federal attack and Southern positions and bullets (MNHC)

More research at site lies ahead

There’s more work ahead, but the project already is helping flesh out details of the fight around Sunnyside as Union forces swept in from the west and north.

“We see a much more complicated picture out of the battle and how it actually played out,” said Fracchia. “It was crucial to tell this part of the Battle of Nashville.”

The commission has found rifle pits and entrenchments on the land. One pit was found this spring when crews were digging a new sewer line to the mansion. “They hit a discoloration in the soil.”

“The soil was burned and there was charcoal. We found melted lead and two percussion caps.” Fracchia (left) said it was evidence of a small fire. “It was very cold during this time period.”

A researcher from Louisville, Kentucky, is doing dendrochronology work to determine the age of the logs.

“We are working on researching what else these bullet holes may tell us,” said Fracchia, adding he may do metal detector surveys and research the site using geophysics. (Metal detecting is illegal on any city property, including parks, he said).

The aim is to tell a wider story and put up interpretive panels next year after the renovation. The archaeologist would like the surviving cabin to have a few places left open so that visitors can see bullets, holes and chinking between the logs. (The holes would be protected by plastic or thick glass.)

Sunnyside Mansion was built in 1852 and it included outbuildings

Fracchia’s work experience has included archaeology in the East, including Baltimore, and forensic aviation archaeology -- he has helped identify fallen US service members overseas.

His goal in Nashville and Davidson County is to build awareness “that could lead to stewardship and ownership and preservation.”

“What is really surprising is the depth and interest in history and the fragility of these resources. We don’t know that they are there until we find them.”

Editor's note: Please contact Adam Fracchia at adam.fracchia@nashville.gov if you have questions or want to join the work on site.

One of the bullet holes tested in a log structure (MNPD)

The rear of the log structures; the one on the right has been removed (MNPD)

Vicksburg park bans drone flights

Vicksburg National Military Park officially is closed to unmanned aircraft, including drones, because of safety and noise concerns.

"The use of unmanned aircraft in parks is a relatively new, but quickly growing trend," said park Superintendent Michael Madell in a statement this week. "Although we have not experienced problems here at Vicksburg, we are concerned that flying the aircraft may have negative impacts on visitor experiences and safety, the solemnity of the battlefield, and park resources."

Other sites in the National Park Service system this week are taking similar stances. In June, the NPS announced the prohibition, saying it needed time to develop the proper permanent policy on unmanned aircraft.