Whenever the planning board in counties having a population of more than one hundred fifty-thousand (150,000) and less than 200,000 has filed with the board of county commissioners a master plan for the physical development of the county, which plan will require a number of years to execute, and such master plan is approved by the board of county commissioners, such county is hereby authorized to issue general obligation bonds in an amount sufficient to carry out such master plan.
K.S.A. 19-2916b