Ok. Always curious why someone would put themselves in a position of being forced down to 500ft, in controlled airspace, trying to maintain VMC, with large obstacles around. I was under the impression that the min height in the TVAA for mil was 1000ft above urban areas.
Of course there are sections of the heli routes where you have to fly lower due to airspace or traffic above, but then you are flying in accordance with a published route. Even under Special VFR, the obstacle clearance only goes down to min 500ft.