The $18.7-million estimate for the proposed Bettendorf waterpark/ice rink project doesn't include $1.3 million in engineering and design costs nor bonding fees or interest expenses should the city need to issue bonds to finance construction of the facility.
The disclosure of additional costs came during questioning of City Administrator Decker Ploehn at the council's Monday night committee-of-the-whole meeting.
The project has been touted as being funded equally with $6 million from the city, and like amounts from the Scott County Family Y and private donors.