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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: An essay about maps
From: Fred Hebard
Date: 2010 Nov 15, 08:36 -0500
From: Fred Hebard
Date: 2010 Nov 15, 08:36 -0500
Looks like I underestimated the size of the catchement area. It seems closer to 5000 than 1000 acres guessing roughly from topo maps. On Nov 15, 2010, at 7:06 AM, Fred Hebard wrote: > I'll ask a friend who works at TVA and try to get back to you all. > I doubt the official TVA story, since the catchement area behind > the dam is only 1000 acres or so. My bet is that the TVA story > glosses over a plain, ordinary screw up. > > > On Nov 15, 2010, at 12:39 AM, Frank Reed wrote: > >> Fred Hebard, you wrote: >> "I live near Bristol, VA/TN. A dam was built on the Virginia side >> (just northwest of Exit 7 on I-81) but the lake never filled; I'm >> not sure why, have heard that the ground leaked (limestone soils/ >> karst topography). Regardless, the Google map depicts the lake >> that's never been there!" >> >> Fred, I LOVE that one. The trails run right through the middle of >> the phantom reservoir. And apparently you can play soccer >> underwater. Here's the coordinates of the reservoir if anyone >> wants to visit: 36.6467,-82.1091. >> >> The TVA, which built the dam, states on their web site that the >> Beaver Creek Dam is "a flood detention dam with no permanent >> reservoir pool." It seems that it was designed only for emergency >> flood control. But somehow, decades ago, the USGS mapped it as a >> filled reservoir (Google gets their basic data in the US from the >> USGS). I wonder if the TVA ever let it fill up just to test its >> integrity... Probably more likely that boundary just represents >> the potential size if a flood ever requires closing the dam. By >> the way, I could find no references to geological or soil issues. >> The TVA counts it as an active flood-control structure, and it >> will probably work just fine if Bristol ever needs it. >> >> -FER >> >> >> ---------------------------------------------------------------- >> NavList message boards and member settings: www.fer3.com/NavList >> Members may optionally receive posts by email. >> To cancel email delivery, send a message to NoMail[at]fer3.com >> ---------------------------------------------------------------- >> > > > >