Re: Working Narrow Gauge in SF Bay Area

Finally located my copy of Reed's "Guide". This book features a photo of the Cargill Salt operation on the front cover and this note on the flyleaf:
"Cargill Salt (the successor to Leslie Salt) operates two of the last of the large scale narrow gauge rail operations left in the country - one at Redwood City, CA and ......across the bay at Newark, CA.
The locomotives at these operations were all origanilly constructed by locomotive builders, such as Vulcan and Brookville, but have all been rebuilt so extensively as to really qualify as "homebuilt". - almost nothing of the original manufacture remains. Also at the Newark plant, Cargill maintains a small museum display of old equipment including three ancient locomotives - a Vulcan, a Caterpillar (likely the only one left) and a Plymouth CL, which would be a worthy site to visit for any student of early locomotives."
Reed goes on to say that the Redwood City facility has four locos - nos 56, 62, 63, and 65. All four are said to be Homebuilt/Brookville, 5 ton, 24" ga.
The Newark plant claims 18 locos (nos 1-18. Sixteen are Vulcan/homebuilt 5-ton; two are Clayton 5-ton. Gauge is not stated, but it's a reasonable guess that it's also 24".
Glad to see some discussion of industrial NG. It's a pet subject of mine and we see to little of it here.
Best Regards,
Jeff