Ind. Code § 36-9-6.5-11

Sec. 11. All proceeds from the sale of bonds issued under section 9 of this chapter shall be kept as a separate and specific fund to pay for the cost of land, rights-of-way, and other property acquired and of the cost of the work and all costs and expenses incurred in connection with it, and no part may be used for any other purpose. The fund shall be deposited at interest with the depository or depositories of other public funds of the consolidated city, and all interest collected on it belongs to the fund.