2018-03-23_PERMIT FILE - M2017013 (8)

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The gate across the entrance will be closed and secured at all times except during hours of construction activity. Topographically the original Signal Reservoir No. 1 and the proposed expansion are located atop a natural drainage divide and as such are not situated in the headwaters of a natural drainage, do not have a natural source of water supply, and receives negligible natural precipitation from surrounding areas. The reservoir has not overflowed and does not provide a natural source of water to any adjacent drainage. The planned expansion entails excavating a portion of the bottom of the existing reservoir. Any precipitation received during the construction period will be contained within the reservoir basin and subsequently be pumped into the adjacent Signal Reservoir No. 2 for containment. TCVMD owns all of the water rights associated with property comprising the permit area and has sufficient water and storage rights to support the planned expansion of the Signal Reservoir No. 1. The U.S. Department of Agriculture (USDA) Web Soil Survey (USDA 2017) indicates that the reservoir is underlain by the Ulm clay loam (UIC) and Platner loam (PIC) soil types Exhibit B-1 Soils Map. The USDA maps label the area comprising the permit boundaries as (W) indicating water. This recognizes the traditional and long-term use of the reservoir containing the permit area as a water storage facility. Soils The Ulm series is described as very deep, well drained soils that formed in calcareous alluvium derived from sedimentary rock. Ulm soils are on relict terraces, alluvial fans, fan remnants, plateaus, ridges, hills and footslopes. Slopes are 0 to 18 percent. The soils formed in fine and medium textured alluvium derived from interbedded shales and agrillaceous sandstone. The Platner series is defined as very deep well drained soils that formed in pedisediments of Ogallala or similar age, and are found on broad table lands and plains. No soils defined as topsoil are present within the planned permit area. TCVMD engaged Earth Engineering Consultants, LLC. (EEC), 4693 Greenfield Drive, Windsor, Colorado to examine subsurface conditions in the area to be excavated in the planned , expansion. Seventeen (17) holes, ranging in depth from twenty five (25) to forty(40)feet, were drilled within and immediately adjacent to the area to be excavated. The drilling and sampling were directed and supervised by an EEC field engineer. The report prepared by EEC concluded that: "The subsurface materials encountered beneath the relatively thin surficial layer generally consisted of a zone of sandy lean clay, lean clay with sand, sandy fat clay and/or clayey sand Signal#1 Reservoir Expansion-111 Special Operations Permit Application March 22,2018 8