You can often locate old docs by doing a "site" search at Google. The site search will pull any item in Google's index even if the site search on the Lancaster site is not picking it up. If you know that you are searching for a PDF, you can also add a "filteype" operator.
Search this at Google:
Code:
site:lancasterny.gov filetype:pdf
Many municipal sites will go through a number of changes in platform over the years and the Lancaster site is no exception. I believe that the prior version of the site was on the Erie County platform (
www.erie.gov/lancaster). If you are finding links to those older documents and they are coming up with 404's, check the URL since it is probably linking to the file at the erie.gov site. Perhaps the county site no longer retained the docs or the internal link was changed without the proper redirect.
Gorja, do you have a link that returns the 404 error? If so, you can dig a little deeper and possibly find it at
www.archive.org using the "Way Back Machine" or you could even locate it in the Google index (cached version).
Good luck. Feel free to reach out if you have any questions.