Delaware’s a small state, and it’s just the wrong shape for getting a good transmission map. Click the above one for a larger view, but it’s still hard to see. But check it out! Take a look at that black line, stretching from Red Lion down to Milford. That’s the 230 kV line that Delmarva Power wants to rebuild. If they play this as I think they will (please prove me wrong), they could use this “rebuild” to significantly increase transfer capacity, which given the withdrawal of the Mid-Alantic Power Pathway (MAPP) transmission project, that’s something to watch for.
Public meeting about transmission line rebuild
7 p.m. Wednesday, Jan. 7, 2015
Odessa Fire Company
304 Main St., Odessa, Delaware
Hosted by Delmarva Power
Carol Overland here with a post on transmission — I’m the transmission wonk, and info on this appeared in the inbox today. Why is rebuild of a transmission line a concern? I’m on alert because there’s essentially no regulation of transmission in Delaware, a fact that’s hard to believe given the impacts and power associated with transmission. This project is intended to go right down an existing easement, but the original line was built 50 years ago, and there’s been a lot of development in Delaware since then. Look at the map, and there’s a lot of development right next to this transmission line. Do you think these folks know anything about this transmission plan? Do you think anyone along that easement is getting direct notice about this???
At first glance, a couple of things occur to me.
- Rebuild? As always, I want to know the details. they say it will still be at 230 kV. Let’s have the conductor specs, particularly. How big a conductor are they using, ACSR or ACSS or higher capacity? Will they be rebuild as a single or double circuit, and will it be bundled or not? Here’s the photo of the line, photo from Snooze Urinal, and it’s as it looks to me from driving under it numerous times on the way to/fro Port Penn:
Photo from The News Journal, delawareonline.com
- Use of existing easement or extending beyond? In their press release, there’s something disturbing about how they say they’re going to build this thing:
The replacement transmission line will be built along the eastern border of the existing right-of-way so that service will not be affected during construction. The original transmission line will be removed once the entire project is completed.
So looking at this photo above, it’s facing north, the H-frames are on the east side, the monopole on the west, and the News Journal report says:
How is that possible? The H-frames have been there a long time, and rather recently they added the monopole next to it. Now now this will be “built along the eastern border of the existing right-of-way.” EH? Here’s an example, at the intersection of Port Penn Rd. and the line, the “east” is on right on this photo/map (click photo for larger version):
Let’s keep going further south along the easement. Here are homes along Old Corbett Rd. near the intersection of Hwy. 9 — note it’s turned around to fit better, the “easterly” direction they’ll build into is the area towards the homes:
Here’s Delmarva’s Press Release:
Here’s the report from the News Journal:
The bulk of this particular project will involve removing the towering H-frame double wood poles that currently support the line. Those poles will be replaced with single steel poles towering up to 140 feet above the landscape.
The new supports will be able to withstand 100 mph winds and will replace infrastructure that was built more than half a century ago. The new line will carry the same voltage, some 230,000 volts, as the old line.
The rehabilitation will not effect customer’s power supply. Though requirements of road crossing permits are not final, the company does not expect the project will necessitate any road closings, according to Frank Tedesco, spokesman for Delmarva.