2018-01-16_PERMIT FILE - M2017036 (2)

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Second Submittal 2.2 Hydrologic Setting 2.2.1 Climate The Site is located in a semi-arid region of the northern Front Range area of Colorado. The regional climate is summarized by data obtained from the Western Regional Climate Center website (WRCC, 2017). 2.2.2 Surface Water Regional Drainage The Site is located within the Cache la Poudre River Basin, a tributary to the South Platte River that generally drains to'the east. Within Larimer County,the River drains a total area of approximately 460 square miles. Perennial flow exists in the River from the mouth of the Poudre canyon downstream past LaPorte and through the City of Fort Collins. In the spring and early summer, the River recharges an extensive valley-fill alluvial aquifer. Infiltration from irrigation diversions and roadside swales adds to the alluvial aquifer recharge from mid-summer through early fall. Dry season River flows are minimal and consist primarily of municipal t'wastewater plant discharges, and irrigation sourced groundwater return flows from the extensive valley-fill alluvial aquifer. To the north of the proposed Project is a small ephemeral drainage flowing generally north to south. This unnamed drainage is partially blocked by the elevated portion of the Highway 287 by-pass. An existing 24-inch corrugated metal pipe allows a portion of this drainage flows to pass from north to south beneath the highway embankment. Perennial wetlands have formed on the north and south sides of the embankment due to this surface drainage and the aforementioned damaged irrigation drains. Local Drainage The Project is located within the Cache la Poudre River drainage basin. Site ground surface elevations range from 5,056 feet in the northwest corner of the property to 5,049 feet at the southeast corner. It lies outside the 100-year Cache la Poudre River regulatory floodplain Loveland Ready-Mix Concrete 5 Telesto Solutions,Inc. 20180112 grom1wxmiudy_1 6ulmwtald— Januaty2018