Replacing tech reports: can we put good undergrad dissertations in arxiv? My department requires dissertations from all honours students (being England, that's basically all of them).  Some of these are extremely good, even though they are written by undergraduates.  My department for some years created a tech report series, which included undergraduate dissertations with high enough marks and the agreement of the supervisor, but now this system has gotten lost in a morass of web redesigns etc.

Is there any new norm for archiving good undergraduate dissertations?  We were thinking of just putting it in arxiv.org, is that considered acceptable?  We are writing an article and want to cite the dissertation for the full implementation details.
Yes.

Any research writing (paper, report, monograph, dissertation, preprint, etc.) approaching publishable quality is welcome on ArXiv, whether its'written by tenured faculty, postdocs, graduate students, undergraduates, high school students, or hamsters.

(I am the ArXiv moderator for cs.DM and cs.CG.  I have not, as far as I know, accepted a paper from a hamster.)