Eric, Thank you for the preliminary plans. Everything looks good but I have a few questions / comments related to the retaining wall: 1. You show an existing grade along the wall of 558.25 along with finished grades (referenced to Icon) lower than 558.25. We believe the lower grades to be the existing grades and the basis for needing the wall. Is the 558.25 existing grade that you show from a field survey that you performed? If so, do you have additional field survey elevations east of the retaining wall that are different than the existing grades shown in the information we provided? 2. I was not aware that we were showing stone veneer on the east side of the bridge. I thought the stone veneer was to be installed only on the Vitruvian Park (west) side. Please confirm this as it will further increase costs by adding stone veneer to the retaining wall face. 3. Has stepping the retaining wall footing been considered? There is a considerable amount of wall in the ground. 4. Has the termination of the rail been set at the end of the wall or could it stop where the grade difference is greater than 2 feet? This would shorten the length of rail. Please let me know. I have re-looked at the street lighting and sidewalk plan for Bella Lane and do not see any conflicts / concerns with the proposed retaining wall. At this time we have not addressed any need for a sidewalk on the east side of Bella Lane. All sidewalks will be addressed in the future with the adjacent proposed development. Preliminary paving plan & profile and street lighting plan sheets are attached for your reference. Joel From: Christiansen, Eric [mailto:echristiansen@halff.com] Sent: Thursday, August 05, 2010 2:32 PM To: Joel Massey Cc: Barnett, Clay; Bruce Dunne Subject: RE: Bella Lane Retaining Wall Joel, Per your request, please find the attached drawings related to the retaining wall at the southeast wingwall of Bella Lane Bridge. Please feel free to send us your comments. Eric Eric S. Christiansen, P.E., SECB, LEED AP Senior Structural Engineer HALFF ASSOCIATES, INC. 1201 North Bowser Road Richardson, Texas 75081 Phone 214-346-6284 Fax 214-739-0095 Cell 972-955-2996 www.halff.com From: Joel Massey [mailto:jmassey@icon-engineers.com] Sent: Thursday, August 05, 2010 7:40 AM To: Christiansen, Eric Cc: Barnett, Clay; Bruce Dunne Subject: RE: Bella Lane Retaining Wall Eric, I do not believe there will be any street lighting on the retaining wall. Outside of the approach slabs, our plan is to go ahead and shift the street lighting over toward the street. I do not believe that any sidewalk extension is needed for the retaining wall. In the Bella Lane package, we are planning to continue the sidewalks up to the approach slabs. Let me look at the two items just to make sure and I will send you a couple of preliminary Bella Lane sheets for your reference. Would you mind sending us some preliminary sheets for the retaining wall for coordination? 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: Christiansen, Eric [mailto:echristiansen@halff.com] Sent: Wednesday, August 04, 2010 4:41 PM To: Bruce Dunne; Joel Massey Cc: Barnett, Clay Subject: Bella Lane Retaining Wall Bruce and Joel, We're finalizing our retaining wall design for use at the southeast corner of the Bella Lane Bridge and we need Icon to answer a couple of questions. First, will there be any street lighting that will need to be installed along the wall? I didn't see any in the CAD files you recently sent to us (7/20), but I wanted to confirm that with you. Second, will we need to include any sidewalk adjacent to the retaining wall? I don't think it will adversely affect anybody if we don't add the sidewalk at this time. However, since Icon is the EOR for Bella, I thought it best to ask you that question. Eric Eric S. Christiansen, P.E., SECB, LEED AP Senior Structural Engineer HALFF ASSOCIATES, INC. 1201 North Bowser Road Richardson, Texas 75081 Phone 214-346-6284 Fax 214-739-0095 Cell 972-955-2996 www.halff.com