Robert, After the vault has been installed is not a good time to see the importance of the elevations, hence, the purpose of my original email. Holding off until later may just create other reasons not to get it corrected (e.g. the VP206 excavation and structural wall that will begin soon). I do not believe that shimming and grouting will be an acceptable solution. The vault roof may have to be removed in the future and a shimmed and grouted condition will not be good. The elevations should have been set and checked for the vault subgrade. The only way to fix it now is to remove the roof, lift the vault, adjust the subgrade and reset the vault. Joel A. Massey Project Manager icon Consulting Engineers, Inc. Bicentennial Financial Center 250 W. Southlake Blvd., Suite 117 Southlake, Texas 76092 Phone: (817) 552-6210 Fax: (817) 552-3126 Mobile: (817) 229-7944 jmassey@icon-engineers.com From: Robert Farrow [mailto:rfarrow@concretepaversystems.com] Sent: Wednesday, June 01, 2011 3:31 PM To: Joel Massey; Eric T. Little Cc: cbarnett@addisontx.gov; Scott Hale; David Jones Subject: Vault Elevations Joel: As I study sheet 10 in detail, I can see the importance of the final elevations of the vault as it relates to the paver and sidewalk elevations. I have already directed John Burn to place as per sheet 10, however it may be best to hold off adjusting the top until all grade work and street paving is in place. I think the best course of action would be to adjust the top only by placing shims and grouting the top from below. Do you concur? Robert Farrow Chief Operating Officer CPS Civil LLC