PER/ALH has 15 flights a week most weeks, with 48 seat F50's. That's 720 seats in each direction.
Think likely outcome will be 34 seats Saab 340's or 36 seats Dash 8 with maybe 2 flights a day M-F & one a day may Sat & Sun, so if say 12 flights a week, that's 408 to 432 seats per week, a more realistic number of seats.
If no Sat flights, then 374 to 396 seats a week in each direction. Fares would probably have to go up as well or lowest fares would disappear or both.
Maybe EPR & ALH would effectively have to share an aircraft.