Finishing touches

Excavation of the Deep Cut
Final rendering of the excavation of the Deep Cut, June 15, 1824.

The Deep Cut Excavation scene has finally reached the final step: fixing mistakes, correcting small problems, and fine-tuning a few small details.

An assortment of native plants that would have been around to recolonize the grubbed landscape: annual daisy fleabane (left), ragweed, and pilewort.

By summer 1824 work had been ongoing for several seasons, and in upstate New York it doesn’t take long for Mother Nature to start reclaiming lost territory. So a few species of foliage – hardy pioneers like ragweed and daisy fleabane – have been added to the grubbed surface on either side of the cut.

Excavation of the Deep Cut
Observers at the time noted that a single man could pull the jib of Orange Dibble’s horse-powered crane into position.

A narrow ditch, excavated by workers to drain away excess water, has been added to the floor of the cut. Dust clouds have been inserted and the position of the sun finalized at 9:50 a.m., June 15, 1824, just out of the upper left corner of the frame.

Excavation of the Deep Cut
By the summer of 1824, work along this section of the Deep Cut was reaching its maximum depth of 31 feet. Excavation was constantly delayed by water, which seeped into the cut from the surface and springs, and workers chiseled a ditch to redirect it. Meanwhile the surface of the towpath was leveled and a wooden sill was added to prevent the canal boats’ tow ropes from getting snagged.

That will have to do it for now. In researching the scene I’ve been struck by how little we know about day-to-day work on the Deep Cut. The evidence is fragmentary and incomplete – bundles of invoices, a handful of eyewitness descriptions (some written years later), a single lithograph drawn “from life.”

Excavation of the Deep Cut
The contractor and engineer inspect the progress of the work.

Tantalizing clues to other details occur here and there, including references to horse-powered water pumps in contractor receipts and the canal commissioners’ reports, and the patent record for Darius Comstock’s excavator. But the clues aren’t enough to go on, so those details had to be omitted. This landscape is just a partial reflection, accurate but with a few missing pieces. The actual scene no doubt would have been a little busier and more chaotic.

Making the cut

Enlarged Deep Cut
A Whipple iron arch bridge crosses the Deep Cut west of Lockport some time in the late 19th or very early 20th century. The rock walls and towpath surface are plainly visible. Photographs like this give us a good idea of what the original Deep Cut might have looked like. (Niagara County Historical Society)

The Deep Cut was a man-made artifact that sliced across the landscape of western New York. At the time, many people saw it as a work of “art” that improved Nature for the benefit of all.

But even though Nature was “improved,” it wasn’t completely overcome. The waterlogged terrain that constantly threatened to flood the work, the dense forest, and most of all the layer upon layer of tough dolomite resisted the incursion and made life miserable for the engineers and workers struggling to execute the great work.

Little was spared in the effort. Great quantities of black powder and whiskey – and an untold number of lives – were consumed as the cut inched forward.

The result was a pre-industrial industrial landscape.

Orsamus Turner, an early settler and newspaper editor, recalled the scene in his Pioneer History of the Holland Purchase of Western New York:

“The dense forest between Lockport and Tonawanda creek looked as if a hurricane had passed through it, leaving a narrow belt of fallen timber, excavated stone and earth . . . The blasting of rocks was going on briskly, on that part of the canal located upon the village site; rocks were flying in all directions . . . and huge piles of stone lay upon both banks of the canal . . .”

This would have been 1822 as work was just beginning. The blasting and huge piles of stone would extend along the entire length of the cut as work continued through 1825.

Digging up the dimensions

As I began to put together the landscape for this scene, my first question was pretty basic: What were the dimensions of the cut?

Surviving records from the original construction period are sparse. We have the annual reports of the canal commissioners, letters from them and the supervising engineers, some early surveys, and some contracts and receipts. To the best of my knowledge there are no engineering plans as we understand them today.

This was art, after all, created by artisans. In the pre-industrial era masons and carpenters drew upon their visual imaginations and years of experience and not much else. Locks, dams, weirs, and so forth were built from memory or perhaps by referring to sketches that were quickly discarded. It was an effective way to work, and the structures that remain attest to the care and pride they took in it.

This soon changed. The industrial era – introduced to some extent by the canal itself – required bureaucracies, trained engineers, and armies of surveyors, clerks and draftsmen. As planning for the first canal enlargement began, they got to work.

Deep Cut Profile
Survey profile of the Deep Cut, 83 chains (slightly more than one mile) west of Lockport. The drawing was made around 1839 to estimate additional excavation work for the First Enlargement of the canal. A yellow highlight is added to show the dimensions of the original 1825 canal. (Author photo from the New York State Archives)

The New York State Archives in Albany has several volumes of contracts and estimates, one of which was completed in the late 1830s for enlargement work along the Deep Cut. I’m grateful for the help provided by the archivists who tracked this down.

The volume contains hundreds of precise cross sections used to calculate the exact amount of soil and rock to be removed for the enlargement. To make them, surveyors measured the prism at intervals of 66 feet (one chain) all the way from Lockport to Tonawanda Creek.

The measurements confirm the maximum depth of the original profile, about 32 feet, mentioned in the canal commissioners’ annual reports. They also include the channel width and the size of the ledge for the towpath. The channel is narrow, about 31 feet, just wide enough to allow two canal boats to pass. The towpath is 10–12 feet wide, just wide enough to allow two teams of mules or horses to pass.

Apparently, the original engineers did not want to blast a single unnecessary cubic yard of rock.

Constructing the surface

The depth of the cut, the vertical walls, and the number of lateral (sideways) displacements make this a difficult landscape to model. After a couple of false starts I used an approach suggested by Ulco Glimmerveen on the Terragen user forum. This approach uses a few large primitive shapes – three cubes and a plane – to set up the basic surface, along with the rock pile shapes described in an earlier post.

Deep Cut Structure
The underlying structure of the Terragen scene is made from primitive shapes and the rock piles created earlier.

The rock walls required more experimentation. Excavated dolomite resembles shale but has thicker layers. Later historical photos (like the one included at the top of this post) were a big help here. (Photos of the original excavation, of course, are nonexistent – photography hadn’t been invented yet.)

Deep Cut Rendering
Terragen rendering of the Deep Cut scene shows the finished rock piles and surfaces.

The rock wall was the biggest challenge, and was finished first. The floor of the cut and towpath, both partly flooded, came next, and layers of rubble were scattered pretty much everywhere. A few variations of the Dibble crane were included as placeholders (more will be added later). Thick, turbulent clouds convey an ominous mood (and help scatter the light into the shadows). A plume of dense smoke from blasting can be seen in the distance.

Despite some natural relief provided by the edges of the forest on either side, the picture so far has a dark, gritty look that seems appropriate.