The filename for the .htaccess file begins with a . (dot). This causes it to be hidden on many Operating Systems.
You will probably have to set your FTP software to show hidden files, in order to download the file from your old server.
This doesn't mean that it's not available. mod_rewrite is only mentioned in phpinfo is you run PHP as an Apache module. I think it's available on all DreamHost's servers.
[color=#000000]DreamHost Promo Code[/color]: [color=#CC0000]Save $50[/color] with the promo code DREAMTEAM