The new admission fees for Spring River Zoo, which were set up earlier this year, will take effect Friday. Visitors will purchase tickets online at the zoo’s website (springriverzoo.com) by clicking on the “Visit” tab and selecting “Tickets.” Upon arrival at the zoo, visitors can show their online tickets using their phone or can bring a printed copy of the tickets with them. Tickets can only be purchased online. Tickets are not available for purchase at the zoo.