SP5103 Wrote:
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> The MP15AC units were far more common around Texas
> - except 2732 is one of four slug mothers that
> bounced around. I think they were tried on the
> humps at Eugene and Roseville(?). I also saw a set
> at Grand Junction but the hump engine being used
> was an SD50.
>
> 2732 built October 1975. RSD15 3100-3102 also used
> on hump but retired in 1973(?) and sold for scrap
> in 1978. Looks like the Baldwin switchers were
> retired by 1974, so the SW1200s and SW1500s were
> the Baldwin killers.

The four slug mothers 2732-2735 were delivered in Fall 1975, but the four slugs 1010-1013 weren't built til Summer 1979. Until the slugs arrived, the mothers were assigned to Roseville and usually worked the Antelope hump m.u.ed to an SW1200 or another mother or a GP9 or SD7, or could occasionally stray from Roseville.

After the slugs arrived, the original intent was to use all four sets on the Antelope hump, but they proved unsatisfactory (had trouble maintaining humping speed), so 2732-1010 and 2735-1013 were sent to Eugene to replace the three C628s on the hump there (that had replaced the three RSD15s in 1976), and 2733-1011 and 2734-1012 were sent to Tucson for flat switching.

2733-1012 were the ones sent to Grand Junction after the DRGW-SP merger to work the hump there, but apparently were not overly successful.