Substructure Maps and Sewer Maps
Zoom into the location/address that you are trying to obtain substructures for and click on the box that the location is within. If it is a stretch of road or area that is larger than one box, you will need to open each box with the process above for each DC-*** map that you are looking for.
Use the interactive map to find the location (address/general area) of the sewer map you are looking for. Left click on the location near your desired address and a box with View Map and View Overlay will appear. Click the View Overlay button. A PDF should appear. Note the letter and numbers associated with the address or areas you are looking for.
Click on the corresponding letters (P.C., C.I, etc.) and then the map number (Book 06500, Book CI1500, etc).