The picture below is of a family which I visited in the town of Hofn. It was taken sometime in the last half of 1968. As I recall, he worked at the site. He may have been related to Valdi. If you can identify them, please let me know who the are. 

From: Sigurjón Björnsson <sii@centrum.is> 

The man on the picture is Valdi´s son, his name is "Eiríkur Þorvaldsson" the wife´s name is Rannvag and the daughter is Anna. 
He and his family have been living in Faeroes sins 1975.

From Eiríkur Thorvaldsson

On your web side for H-3 in Iceland in that old good days you ask about a picture of me and me and family. As Sigrjón have mailed -is my name Eirikur Thorvaldsson but I was always called "Eddie" and worked at the milk plant (dairy) in Høfn. I'm Valdi´s oldest son.Im now 59 years (about 20 on that picture) Since 1978 I have been working as director of the milk company in Faroe Islands (www.mbm.fo). All barracks/buildings on Stokksnes are gone now. Just one automatic radar is left. My dad is still going strong (76) - here is picture of him taken in august this year
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>Vinalig heilsan/Venlig hilsen
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>Eiríkur Thorvaldsson