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<br />XlV. MAINTENACE <br /> <br />The City of San Marcos, Department of Parks and Recreation, will assume responsibility for <br />all operations and maintenance costs for all of the proposed facilities. No revenue is <br />expected from the enhancements proposed by this nomination. <br /> <br />Currently the City of San Marcos contracts out the mowing and clearing of the Purgatory <br />Creek which is accomplished three times a year. The maintenance contract for this segment <br />is $24,000 per year. <br /> <br />The City of San Marcos currently maintains, as a part of their operations budget all of the <br />other facilities proposed in this nomination. <br /> <br />xv. ENVIRONMENTAL PROJECT IMPACTS <br /> <br />Areas of positive environmental impacts include: (1) the reduction of auto emissions as a <br />result of alternative modes of transportation (walking and bicycle), (2) mitigation of parking <br />lot runoff pollution in the San Marcos River due to sedimentation and filtration ponds <br />included as a part of these projects, and (3) education of the visiting and resident public <br />using the facilities through the Education and Interpretative Center. <br /> <br />Areas of possible negative environmental impacts include: (1) increase in levels of noise <br />due mostly to the construction effort, (2) increase in levels of sediment runoff due to the <br />denuding of the land for the construction effort, (3) increase in levels of possible pollution <br />and possible effect on the four endangered species found in the San Marcos River. Under <br />no circumstances, not even during the construction effort, will the noise levels exceed those <br />levels which are considered close to be harmful to humans and/or animals. Sediment will be <br />contained at all costs to keep it from reaching the San Marcos River through the use of silt <br />fences, rock berms and other temporary facilities until all grass is established which is to <br />serve as a part of the permanent erosion controls. Retaining walls will be utilized to keep <br />slopes to a minimum to reduce erosion. <br /> <br />All improvements will be designed to fit the surrounding environment and planned use of <br />the adjoining areas. Heavy use areas will consist of concrete and/or compacted granite to <br />resist user abrasion and/or runoff conditions. All trail runoff will be controlled to guide the <br />runoff across established grass areas which serve to remove or reduce the pollutants found <br />in the runoff. <br /> <br />10 <br />