Dear Al :
In USACOE HEC-RAS 2.2 Hydraulic Reference Manual, Table 6.5, there is no support for many chart numbers--including Chart Number 52. If these additional chart numbers are supported with HEC-RAS 3.0, we will definitely add support for them when we release RiverCAD 2001.
Sincerely,
Chris E. Maeder, M.S.
Senior Technical Engineer
chris.maeder@bossintl.com