Quicky: I think Reconstruction 6/13/79 at the River Theater in Guerneville should be dated 6/23/79

update: I am now 100% certain that the correct date for this material is 6/23/79

The tape we have of the titular show comes from Alan Bershaw. Turns out he didn't tape it, but circulating versions come from his copy. This is a 2nd copy, lineaged as follows: Nak 550 w/CP3 caps > MAC > Nak 582 playback > 7.5 ips reel > Alan's reel.

Alan Bershaw's reel of "6/13/79" - thanks, Alan!

I am the last thing from a gear head, but the Nak 550 is the deck, but the CP3 caps would go with the mics, which remain unidentified. I also don't know the speed at which Alan's reel was recorded.

Anyway, let's first establish that, even with such good provenance, a '2' can become a '1' via careless manuscripting/transcription, and so it's not crazy to think that 6/23 could become 6/13.

Second, doggy no barkie. There is no other evidence for Reconstruction at the River on 6/13/79 (a Wednesday).

Third, there is evidence from the Santa Rosa paper that the theater was showing movies that night (King of the Gypsies at 7:30 and Hurricane at 9:30, for the curious).

• ! Ad: [contra] Santa Rosa Press Democrat, June 13, 1979, p. 11B

Fourth, the 6/23/79 Reconstruction got lots of play in the papers.

• preview: "Reconstruction Rocks at the River," Argus-Courier (Petaluma, CA), June 22, 1979, p. 3B
• listing: Argus-Courier (Petaluma, CA), June 22, 1979, p. 5B
• ad: Press-Democrat (Santa Rosa, CA), June 22, 1979, p. 10B

The preview notes that "Saturday’s concert is expected to be one of the last Sonoma County appearances for the group, as Garcia will soon be going into the recording studio to begin working on a new Grateful Dead album".

There was also a handbill:

If Reconstruction was such a big deal, why wouldn't a show ten days earlier have gotten similar sizzle?

Fourth - and I could have started with this, because it's QED from here, IMO - among the relatively undocumented detritus of the Betty Boards was this lil ol cassette:

soundboard cassette tape of Reconstruction 6/23/79 at the River Theater, "set #2". Scan courtesy of ABCD.

As it happens, a little birdie has told me that the material on this cassette is identical to material circulating from Alan's tape. Even the temporal assignment lines up: Alan's tape is primarily of the late show, and this tape says "2nd set". Not exactly the same wording, but it's pretty clear there were early and late shows this night.

update: again, this is now settled. The material is 6/23/79. There was almost certainly no Reconstruction gig on 6/13/79.