This is original to the line, as far as I can tell.  The date (1907) is right.  This two span concrete bridge for the CSX (formerly Clinchfield) over Reedy Creek is  just off Industry Drive in Kingsport, near the new roundabout on Netherland Inn Road. (There’s a new span that takes the line over Center Street as it intersects Netherland Inn Road.  I vaguely remember the old span, which was just a two-lane overpass.  There are remnants of the old concrete structure still in place up on the line.)
This span actually no longer carries the weight of the line, it’s been strongly reinforced.  It you go by this now, you’ll see the Greenbelt covered bridge going through the left span.

This is just off Hwy. 36 on Summerville Road in Kingsport.  Again, this is a 1928 rebuild replacing what was probably a timber bridge.  This is looking toward the highway.  There’s no date on the other side.

This is Brush Creek (thanks, Jon Hirst!) tunnel between Green Mountain and Red Hill NC, on Green Mountain Road…all west of Bakersville.  Funny thing about tunnels: you can be more or less in the center of a short tunnel where you can see bright daylight from each portal, but where you’re standing, it’s pitch black.

Neat, closed-to-traffic, concrete arch bridge was made by Luten Bridge of Knoxville in 1918.  This goes over Puckett Creek at Stone Creek and used to connect St. Charles Road with what was then the highway between Pennington Gap and points north.  It’s very near the intersection of Highway 421 and St. Charles Road just north of Pennington Gap. Here it is (this is looking from the highway side).  A tip of the bald guy’s cap to Lee Stone for spotting this one.

Here’s the identifying plate

Well, it’s a tunnel, since it’s on Cowan Gap Tunnel Road (Hwy. 636) in southwest Virginia.  This railroad (CSX) underpass, from 1907, is about 125′ long and runs aslant under the railroad.  This is at 36.61900, -82.68865.

This is the west end of Frisco Yard, shared by N&S and CSX.  I took both pictures from approximately 36.592870, -82.631917.  Or just go to Google Earth and enter Frisco VA and you’ll see it.  The picture of the N&S engines is looking east.

This gem of a McClintic-Marshall Company (Pittsburgh PA) 1922 deck girder is on the old Interstate line between Norton and Coeburn.  It’s original, since this line was constructed in 1923 or so.  It crosses an active N&S line and the Guest River.  Surprisingly, the rail on the bridge is dated 2011 and it seems to have had moderate use.  It centers at 36.94253, -82.58283 and it’s maybe 260′ long.

I’ll be damned if I didn’t miss a tunnel in all that scouting along the CSX line between Erwin and Altepass.  My buddy called me a couple of days ago and said he’s spotted a tunnel on the topo that we hadn’t been to…it was on the Toe River, just west of Loafers Glory NC.  I went up on Google Earth and located it at 36.00598, -82.23743.  It’s in Goforth’s book at 163.11 miles south of Elkhorn City.  I’ve looked at that list a dozen times and completely missed this tunnel.  The tunnel is 304′ long on a curve and completely unfinished, except for some supporting concrete on the left of the south portal.  Strong stone there, for sure.  Here’s the south portal and the mile marker just before the south portal.

Here it is, the north portal of the Highline tunnel near Cawood KY at 36.78308, -83.24311.  It’s one of three tunnels between Cawood and Smith KY (where Hagan tunnel’s north portal is). This one is a little over 1,200′ and curved, so you can’t see the other end from here.   Note the lack of facing, indicating that the rock here is strong. The line is active.  And, as you see from the mile marker, 251 miles from somewhere.

Go northeast on 38 from Harlan KY for just under a mile and you’ll see these tunnels.

We didn’t know what to make of them, so, when I got back, I did a little research.  They’re an Army job.  Finished in 1992, these four tunnels divert the Clover Fork of the Cumberland River away from downtown Harlan, where there had been a history of flooding, into Martin’s Fork.  The tunnels here are at 36.85526, -83.31546.  The one the left carries the most water, normally.  The actual input portals are at 36.85125, -83.31086, about 2,000′ away to the northeast going under Ivy Hill.  The four tunnels minimize the possibility that one will get clogged up with debris in a flooding situation.  Those who canoe or kayak say that these tunnels are safe, with smooth bottoms and moderate flow.  The rock around the tunnels has been sprayed with concrete to stabilize it.  You never know what’ll turn up in Kentucky.

I’ve bought a new negative/slide/print scanner.  It does pretty good for the price ($109)(it’s an SVP)(China).  While looking through some old color negatives, I came across this one that I’d taken maybe 25 years ago.  This bridge, which spans the fabled Reedy Creek (as in that legendary perfume “Reedy Creek Mist”) and the Greenbelt, was replaced by the City a couple of years ago.  I hope someone kept this.  The plaque is hard to read in this resolution and size, but here’s what’s on it: Federal Works Agency/Public Works Administration/John M. Carmody/Federal Works Administrator/Franklin D. Roosevelt/President of the United States/Center Street Bridge/1939.
Parlous times, those were.  Probably quite a few men were damn glad to get a chance to work on this bridge.

At this point, Highway 751 passes under the Norfolk-Southern line that comes out of Marion VA.  The concrete on this underpass is beginning to show its age.  Interestingly, there’s a wye at Glade Spring, just west of here.   We’re at 36.79238, -81.74222, with the main highway behind yr. hmbl. photographer.  The date “1917” is stamped into the concrete above the right underpass.

The plan today (9/1/13) was to head up to Sensabaugh Hollow, scramble (again) up the fill to the railbed and retake Sensabaugh and Click tunnels, which are within a half-mile of each other.  Now, we’d checked the radar and we had seen an area of rain moving in, but we figured it was at least thirty minutes or so away.  Wrong again.  Just after I finished taking the picture below, we heard thunder, turned around to look north and saw the storm moving in.  We looked at each other and said, almost in unison, “It’s a washout!”  We got back to the car just as heavy rain began.
Sensabaugh, by the way, is the first tunnel on the CSX line going north from Kingsport (this is a southerly view).  It gets its name from the small stream that runs down this hollow.

The CSX line (former L&N)  going above these two underpasses is active.  It comes down from Harlan and heads into Hagan Tunnel.  The dating on the faces of the tunnels on this line is 1930.  Since the date on the culvert between these two tunnels is 1951, I suspect (and will readily accept correction) that these probably date to around that time, more than likely replacing a timber structure.  This is the former railroad underpass:

This was a line that branched off a line through Cawood and came through here on the way to Three Point, where there were three drift (deep) coal mines.  Back when the railroad was here (it’s now County Road 1705), the depth of the ballast would have made the tunnel look less intimidating.  This is centered at 36.774076, -83.243284.

This is the auto underpass, just next to the above.  It’s at 36.773738, -83.243456.

This would have been the vehicular access (Rt. 991) to Three Point.

We had been meaning to get this portal for quite a while.  This is in Kentucky, near Sampson.  The portal has a 1930 date, clearly seen.  On my other post for Hagan Tunnel, I note that the line came through here in the late 20s.  This, then, may be an original portal facing, done when the road was completed (another tunnel on this line near here also has a 1930 date).  The tunnel comes out in Hagan VA, where there are two wyes (see the comment below…it’s a switchback).  The railroad was in the process of working on this tunnel.  Off to the right you can see the 750 kw generator.  This also an air compressor on site, to which the orange-ish lines coming off the horn things are attached to.  (edit here: the “horns” are there to allow the compressor to push fresh air into the tunnel when workers are present)

Miller Yard (or Miller’s Yard), northeast of Dungannon, used to be a happening place.  A little bit east of the main yard was once the junction where the Interstate line out of Coeburn (going down through Guest River Gorge) hooked into the Clinchfield line.  The old Interstate bridge over the Guest River is a McClintic-Marshall deck girder made in Pittsburgh in 1922.  This bridge is now the lower terminus of the Guest River Gorge Trail.

The other bridge, which is nearly impossible to easily get a good picture of, is active and much older.  It’s a Pennsylvania Steel Company deck girder made in 1907 in Steelton PA.  I can explain why there’s not a better picture.  To get a view of the date plate on this bridge, I had to scramble down the abutment of the other bridge, then carefully make my way down the Guest River, stone by stone, to where I was under this bridge.  I could have gone back up and then carefully made my way down the abutment you see in the picture (on the other side of the river) to a place I could have taken a better picture.  Forget about it.