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I-35E Corridor AUAR Update April 15, 2020 Page 7 iv. Surface Waters a) Wetlands – Describe any anticipated physical effects or alterations to wetland features such as draining, filling, permanent inundation, dredging and vegetative removal. Discuss direct and indirect environmental effects from physical modification of wetlands, including the anticipated effects that any proposed wetland alterations may have to the host watershed. Identify measures to avoid (e.g., available alternatives that were considered), minimize, or mitigate environmental effects to wetlands. Discuss whether any required compensatory wetland mitigation for unavoidable wetland impacts will occur in the same minor or major watershed and identify those probable locations. b) Other surface waters – Describe any anticipated physical effects or alterations to surface water features (lakes, streams, ponds, intermittent channels, county/judicial ditches) such as draining, filling, permanent inundation, dredging, diking, stream diversion, impoundment, aquatic plant removal and riparian alteration. Discuss direct and indirect environmental effects from physical modification of water features. Identify measures to avoid, minimize, or mitigate environmental effects to surface water features, including in-water Best Management Practices that are proposed to avoid or minimize turbidity/sedimentation while physically altering the water features. Discuss how the project will change the number or type of watercraft on any water body, including current and projected watercraft usage. Impacts to wetlands and surface waters include potential impacts associated with filling or draining as development occurs. These impacts were contemplated in the original AUAR. Estimates of wetland impact for the study area are difficult to anticipate without specific site plans. However, these impacts are anticipated to be typical of development and are subject to local, state, and federal wetland rules through the Rice Creek Watershed District, Wetland Conservation Act, US Corps of Engineers, Minnesota Department of Natural Resources, and the Minnesota Pollution Control Agency. Hardwood Creek and Peltier Lake are impaired waters. Impacts will need to meet the sequencing requirements or water quality regulations and wetland replacement and/or treatment may be needed. Replacement could occur on-site or through the purchase of wetland banking credits. No significant difference in analysis from the original AUAR is needed for this Update. 12. Contamination/Hazardous Materials/Wastes: a. Pre-project site conditions – Describe existing contamination or potential environmental hazards on or in close proximity to the project site such as soil or ground water contamination, abandoned dumps, closed landfills, existing or abandoned storage tanks, and hazardous liquid or gas pipelines. Discuss any potential environmental effects from pre-project site conditions that would be caused or exacerbated by project construction and operation. Identify measures to avoid, minimize or mitigate adverse effects from existing contamination or potential environmental hazards. Include development of a Contingency Plan or Response Action Plan. No significant changes to existing conditions in relation to existing contamination or hazards have occurred based on a review of “What’s In My Neighborhood.” A summary of the review is included in Appendix G. b. Project related generation/storage of solid wastes – Describe solid wastes generated/stored during construction and/or operation of the project. Indicate method of disposal. Discuss potential environmental effects from solid waste handling, storage and disposal. Identify measures to avoid, minimize or mitigate adverse effects from the generation/storage of solid waste including source reduction and recycling.