And since it is new, and for ease of use and troubleshooting later, you can add the circuit numbers of your loops to the des of the route/dch. For me it makes it easier to call a ticket in instead of looking for your documentation.
And when naming my d-channels I put the d-channel location/description and the associated loop number (Location X - LP2. That speeds things up as well if you have a circuit down.
Another thing to consider, again this is my personal preferrance, to save up on 4 digit extension numbers, especially ones in your DID range, I program the ACOD's of my routes, the rollovers of my phones, and the acd pos id's to 5 digits instead of 4. This just free's up all of your possible extensions for later use.
You may also want to consider a dialing plan as well. If yuo have mulitple departments, document that dept. A has 2100 through 2150, etc. When I started here at the bank they had no structure like this at all. Thankfully they hired me on to blow it all the way and rebuild with new DID ranges etc. Now if some new hire comes in and they are working in Dept A, I know from my documentation that A equals 2100-2150 and print an ludn from that range.
It can be a pita to do, but as John said if you take your time, and do it in an organized way, the extra time you spend now will save you tons of time in the future.