Yes, we have special Funds to track the repayment of the bonds. We won't try to explain the different types of bond issues, but trust me we need to track them very carefully. The bond buying marketplace keeps a close eye on our Debt Service Funds. These are business like activities of the city where the customers are outside of city government. The long-term costs include the maintenance of the capital investment.
Examples here are print shops, motor pools, and other central services.
These are really Funds where it isn't the city's money, but they are holding it for someone else. There are two, debt and fixed assets. They are basically lists of the governmental debt and governmental assets.