Finally, even if that all the foregoing assumptions are justified, the argument still suffers from claiming that the city need to increase its budget for improvements to the publicly owned lands along the Mason River. The arguer shows no evidence that people use the river for recreational activities will to some extent complain about the lands along the river. Perhaps the lands is of enough high quality already. Lacking evidence that the lands need to be improved, I can not accept that increasing its budget for the lands is a must.
In sum, the conclusion reached in this argument is invalid and misleading. To make it logically acceptable, the arguer should have to demonstrate that most people complain about the quality of the water in Mason River and that the plans to clean up the river will soon be put into practice, leading to higher quality of water in the river. Moreover, I would suspend my judgment about the credibility of this argument until the author can provide more evidence about whether the lands of the river is of poor quality and need to be improved.