Spending 3-5 points on infrastructure like slips and docks over the 10 year period would be quite reasonable, so as RA says you could enlarge your Type 2 dock to a type 3 and build another Type 2, or a Type 3 slip, or 3 Type 1 slips, etc, etc.
You wouldn't get another 30 points of infrastructure, since that was for when the sim started. You have what's listed, plus some more as RA mentioned to catch up to modern times.