This Picture was taken on 25 March 2009This stamp was found on the side walk at the corner of Front st and West Broadway. The address is 110 West Broadway. The Building at this address is the at&t building. You can see a 3D Model of this here. I wasn't able to find a website for H & D Construction. The info for the company is as follows.
H & D Construction1369 N Magnolia Ave
El Cajon, CA 92020
(619) 444-6118
