There’s been a lot going on down DP Road lately. Not only has the new roundabout construction brought this out of the way area to our attention. But the addition of dozens upon dozens of promising new residential dwellings has also livened up the conversation. Whether you’re a long time resident of Los Alamos or a newcomer, it’s possible the name of that road causes a bit of head scratching. Sometimes, if you’ve always heard something, it becomes the norm and you stop thinking about the strangeness of a name. If you’re new to the area, you might have looked at the road signs, scratched your head, and attributed it to the general oddness that is attached to Los Alamos in general.
When it comes to DP Road, that’s pretty much right on the money. Just for fun, let’s look at some of the possible origins of the letters D-P as researched by Craig Martin for his book, Los Alamos Place Names.
DP Site
It is a fact that in 1945 the production of plutonium took place in the Chemistry building which was referred to as D-Building. At the time it was located near Ashley Pond and pretty much right in the middle of everything else too.
Three things happened fairly close together to spur on a location change. First, the full health concerns in the handling of plutonium began to be recognized. Secondly, the amount of plutonium being handled at D-Building increased rather drastically. Thirdly, there was a fairly large fire in C-Shop not far from D-Building.
In order to prevent a large scale plutonium disaster that would not only be a health and safety hazard, but could also shut down activities at the Technical Area, TA-1, management determined it was time to move operations at D-Building to a new location at D-Site. Somewhere a little more remote and therefore safer.
Damn Plumbers
This particular name suggestion came from the number of contractors working at the site who belonged to the plumbing profession. Realistically however, plumbers certainly didn’t make up the entire workforce at the new site.
Displaced Persons
There’s a good chance that anyone who has been in Los Alamos for a period of time, whether by choice or by necessity, has felt somewhat displaced. Part of this phenomenon can be attributed to the fact that the Secret City on the Hill was always intended to be somewhat remote. Most of the workforce in the early days were brought in from somewhere else. They were displaced. Not only that, but the personnel sent away to the new D-Site from the main Technical Area near Ashley Pond were being displaced quite a large distance from the original D-Building. The new Chemistry building on DP Road was supposed to be far away from everything else. Sure, it was a practical decision, but many of those people certainly felt like “displaced persons”.
D-Plutonium
A good number of the original workforce at the new Chemistry building assumed DP stood for D-Plutonium because of the nature of the work they were doing there and the materials used. Although another construction worker at the time the facility was built thought that P stood for Polonium, which is an element in the uranium-radium series of radioactive decay. How many elements on the periodic table start with P? We will never know which one it was really meant to be!
D-Plant
This likely candidate was suggested because in the original building documents at the time refer to the “Plant” Committee overseeing the building of the “plant”. If you believe this bit of rational history, DP stands for D-Plant where plutonium was manufactured. It’s a rather unromantic origin story, but sometimes those are the most accurate.
D-Prime
This one is probably the most widely accepted meaning behind the DP in DP Road. There is a practicality to this given the scientific jargon and the fact that D-Prime eventually replaced D-Site. There was also another building called P-Prime nearby. Eventually, this was shortened to D-P and then years later the road going down to the facility was referred to as DP Road.
D-Production
Something that isn’t always made clear is that D-Site (on DP Road) was a new Chemistry building to replace D Building (back over by Ashley Pond). However, D-Building was still a thing. Calling D-Site by that name emphasized the relationship between operations at D-Site that used to take place in D-Building. This relationship created some pretty hefty confusion in the mail service here in Los Alamos. A lot of the mail addressed to D-Site would be delivered to D-Building by mistake.
A man named R. H. Dunlap was in head of administrative and personnel issues, which included the mail service. Urban Legend and some historical documents suggest that he solved this confusion of mail delivery by calling the new building DP, short for D-Production. The idea was that all of the production activities formerly taking place at D-Building had been transferred to D-Site and therefore mail pertaining to production needed to be sent to the new facility.
Who Knows?
The truth is that we don’t have any actual written records. There are historical documents and anecdotal information provided by those who were part of the community “back in the day”. But we will really never know. Whether you want to think DP Road is Displaced Persons, D-Prime, or was named for D.P. Macmillan (a LASL scientist at the time), that is YOUR decision to make. In the meantime, DP Road is just one more strand of the charming and unique fabric of Los Alamos History.
If you’re ready to weave yourself into the fabric of our community here in Los Alamos, give me a call. I would love to get to know you and your family and introduce you to life in Los Alamos!
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