Ameren-Missouri consumers will start digging a little deeper into their wallets to pay for service. The public service commission has given unanimous approval to a rate hike case authorizing Ameren to increase operating revenues by about $92-million. The original filing with the PSC had requested an increase over $200-million. As part of the approval, Ameren will continue the Fuel Adjustment Clause allowing for consumer bills to be adjusted up to three times a year reflecting changes in fuel and purchased power cost. The average residential increase will be around $3.70 per month, effective April 1st.