Gas prices have gone up about 30-cents in the past week, after falling below two-dollars a gallon. Experts say it is due to the recent shutdowns of refineries in the Central U.S. Twelve refineries are undergoing repairs and maintenance. Prices in the Lake area range from between two-18 a gallon in Osage Beach to two-29 in Lake Ozark. The good news is prices are expected to start falling again once those repairs are completed…