The county has limited means in which it can borrow money. One of those methods is to ask citizens to vote on whether they want the county to borrow the money for the proposed purposes. It is made clear when the question is put to the voters that a corresponding increase in property taxes may be necessary to fund the bonds.
Once the question is put on the ballot for a vote, if a majority of citizens vote yes for the bond, the county has the authority to borrow those funds. This type of borrowing requires repayment using the county's property tax revenue.
Typically, when the county issues voter approved bonds, it makes debt service payments on those bonds for 20 years. At the end of the county's 2016 fiscal year on June 30, 2016, the county had over $337 million in outstanding voter approved bonds. This amount increases as new bonds are issued and decreases as debt service payments are made.