2016-10-21_PERMIT FILE - M2016009 (9)

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I 102-D Oneida Street Jesik Consulting Pueblo, Colorado 81004 Water, reamw (719) 582-5588 www.jesik.us October 4, 2016 John P. Ary Fremont Paving & Redi-Mix Inc. P.O. Box 841 Canon City, CO 81215 RE: Bessemer Ditch Crossing & Encroachment For 44- Lane Aggregate Project Pueblo County, Colorado Project No: 16-7166 Dear Mr. Ary, Jesik Consulting was contacted by Angela Bellantoni, Ph.D. of Environmental Alternatives, Inc. to assess the proposed Bessemer Ditch crossing and encroachment for the subject property. The Bessemer Ditch Crossing Preliminary Layout, dated June 2016 in addition to Exhibit C -Ib, Existing Site Condition & Surface Owners of Record, were reviewed. Andy Jesik, P.E. of Jesik Consulting was escorted by Ms. Bellantoni on September 27, 2016 to complete a site visit of the proposed ditch crossing. The water surface width is approximately 18 feet at the Bessemer Ditch crossing. The proposed precast concrete bridge will span 24 feet with a height of 8 feet 6 inches from the footings to the bridge deck. Surficial soils at the crossing were low plasticity sandy CLAY. Silty sand or gravelly sand are likely to be found below the clay at the proposed crossing. Generally, these soils and the observed surface conditions at the crossing will not present significant engineering obstacles that may prevent construction of a precast concrete bridge. The proposed haul road is within 200 feet of the Bessemer Ditch approximately 1,200 feet southwest of the crossing. The haul road will be located near the centerline of a 60 -foot -wide easement. Currently, the typical cross section of the haul road will be 30 feet wide. This proposed haul road alignment provides a 15 -foot buffer between the edge of the haul road and easement. The easement is not adjacent to the Bessemer Ditch at this location. Vehicles using the road will be typical haul trucks used on public roadways such as tandem dump trucks and tractor trailers. Large raining equipment are not planned for travel along this haul road. Surcharge loads to soils created from the estimated traffic previously described will be applied to the soils at a distance far enough from the Bessemer Ditch to prevent movement of the existing ditch edges. Surface water runoff should be directed away from the Bessemer Ditch to prevent erosion in these areas. The proposed precast concrete bridge crossing and haul road encroachment to the Bessemer Ditch will not cause adverse effects to the Bessemer Ditch provided proper haul road and bridge design is completed. No conditions were observed that would prevent fairly standard construction of the road and bridge. Sincerely, v° D..0 P . m 397,81 5 : o . Joseph A. Jesik, P.E Chief Engineer_—