3. Affected Environment, Impacts, and Mitigation
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Bemidji – Grand Rapids Transmission Line February, 2010 Draft EIS 3. Affected Environment, Impacts, and Mitigation This section describes the environmental setting as it relates to each alternative considered under the proposed Project. The resources and environmental settings included for analysis within this section were identified during the scoping process for the Project. The following subsections are divided into discussions about the affected environment, potential direct and indirect impacts from the Project, and potential mitigation measures. The discussion of affected environment describes the resources and environmental settings found in the Study Area. For purposes of analysis, the Study Area is defined as the generally 1,000-foot wide route proposed for each of the build alternatives (Route Alternatives 1, 2, and 3 and their associated Segment Alternatives A through T). The discussion about direct and indirect impacts describes the potential effects from the Project alternatives, including the No-Build Alternative. For each of the Route Alternatives, the Applicants identified a feasible 125-foot wide Right of Way (ROW) that could be located within the 1,000-foot wide route. Analysis of direct and indirect impacts was conducted assuming the placement of the feasible 125-foot wide ROW identified by the Applicants. For those Segment Alternatives for which a feasible ROW has not been identified, analysis was conducted assuming the placement of the ROW along the centerline of the 1,000-foot wide route. A comparison of the Project alternatives is presented in Section 5, Comparison of Alternatives. The actual location and width of a ROW for the Project is unknown at the time this document was prepared, and will be determined in the Commission’s High Voltage Transmission Line (HVTL) Route Permit for the Project. The potential effects of the Project on resources within the boundaries of the Leech Lake Reservation and Chippewa National Forest are described separately for each resource, to identify unique potential impacts to those geographic areas. The mitigation discussion provides potential measures to reduce or eliminate anticipated direct and indirect impacts identified for each resource area. Mitigation measures are not discussed for identified potential direct and indirect effects that are either not anticipated to occur under construction or operation of the Project or are anticipated to result in a positive effect. The mitigation discussion includes typical High Voltage Transmission Line (HVTL) permit conditions issued by the Commission, mitigation strategies proposed by the Applicants in the Application for a Route Permit, and additional mitigation measures that may be warranted. For mitigation measures that have been proposed or agreed to by the Applicants, the text specifies that these mitigation measures “would” occur. For all other mitigation measures, including those that may be required by the HVTL permit or imposed by regulating agencies, the text specifies that these mitigation measures “could” occur. 55 3. Affected Environment, Impacts, and Mitigation Bemidji – Grand Rapids Transmission Line February, 2010 Draft EIS 3.1. Aesthetics This section provides information about the existing visual landscape in the Study Area and describes identified scenic areas and sensitive visual receptors. For the purposes of this analysis, the Study Area is comprised of each of the 1,000-foot-wide Route Alternatives and Segment Alternatives. The potential aesthetic impacts would occur to viewers (e.g., residents, historical users of the Study Area, recreational users, and those traveling on area highways and roads) that could view the newly cleared Project right- of-way (ROW) of up to 125 feet and associated transmission line structures from within and outside of the Project ROW. For purposes of analysis, potential impacts to the ROW were calculated using the feasible 125-foot ROW identified by the Applicants for each of the Route and Segment Alternatives. The focus of this analysis is placed upon visual experiences, which are the ways in which people view the landscape. The active recreational use of these resources is discussed within Section 3.13, Recreation and Tourism. Potential impacts of each of the Route and Segment Alternatives were evaluated based upon two methods, overall impacts to visual resources/users and to Chippewa National Forest (CNF) scenic integrity objective (SIO) classifications. With the former method of analysis, visual simulations were evaluated for the Study Area. The Applicants commissioned a visual impact assessment in 2008 that incorporated methods commonly used by the Minnesota Department of Transportation (MnDOT) for linear projects. For that assessment, the MnDOT Visual Impact Assessment (VIA) process was augmented to include VIA techniques developed by the Federal Highway Administration (FHWA) and scenic management practices developed by the USFS (FHWA, 1981; MnDOT, 2009d). As part of the visual impact assessment, visual simulations of the Project’s potential infrastructure were created. The visual simulations were used to determine the effects of the Project, which include whether or not residents and visitors to the Project area would be able to see the transmission lines and other infrastructure from common vantage points (see Appendix E). As indicated in Section 2.4.1, Transmission Design, the typical structure material would be either wood or steel. The visual simulations appear to utilize a wood structure. Where available, photographs are provided to analyze typical urban/highway settings within the Study Area, locations within an existing utility ROW for transmission lines and/or a pipeline, and in locations where a new ROW would have to be created for the Route Alternatives. For the second method, the U.S. Forest Service (USFS) Handbook for Scenery Management and the concept of “landscape visibility” discuss the relative scenic importance of locations within the Study Area. The CNF SIO classifications were used to classify visual resources for the alternatives both within and outside of the CNF. The definitions of high, moderate, and low SIO values were used within a geographic information systems (GIS) program to determine the percentage of each Route and Segment Alternative located within an area of a particular SIO value. The GIS program also matched the existing land cover and use to the various categories to determine the amount of land acreage with High, Moderate, and Low SIO values. 56 3.1 Aesthetics Bemidji – Grand Rapids Transmission Line February, 2010 Draft EIS The model also was extrapolated and applied to the Study Area outside of the CNF. For Route Alternatives of outside the CNF, the following categories were evaluated: • High SIO: U.S. and MN roads, Lakes with Public Access, the Mississippi River, the Paul Bunyan Trail, and the Heartland Trail; • Moderate SIO: County State Aid Highways and Municipal Areas; and • Low SIO: All areas not identified according to the aforementioned criteria (Otter Tail Power et al., 2008a). Determining the potential impacts to the SIO ratings is difficult to do because the ratings are based upon the overall characteristic of an entire roadway, landform, location, or in the case of the CNF, a management area. Therefore, as described in Section 3.1.2, it could only be stated the Route Alternatives generally would not directly alter the overall SIO rating of a particular resource, the impacts would be localized and would be minimal in scale. For instance, Route Alternatives 1 and 2 cross the Mississippi River west of Ball Club, but the overall SIO value of this resource (i.e., the Mississippi River) would not be impacted, because only a minimal portion of the river’s total length would be affected by the construction and operation of the Project. 3.1.1. Affected Environment The area in northern Minnesota that the Route and Segment Alternatives cross tends to be positively valued for the “scenic” quality of its forests, lakes, and unique natural resources. These landscapes are often viewed from individual homes by residents in the area. For visitors, these landscapes are typically experienced from the vantage point of a road, trail, or body of water. United States highways, state highways, large bodies of water, and municipal areas are the most frequently used vantage points within the Study Area. Additional information about these types of resources is provided in Section 3.13, Recreation and Tourism. Section 3.13 provides information about both the active and passive uses of resources located within the Study Area. This section describes the current conditions within the Study Area and provides assessments of the existing scenic character and viewer sensitivity in the Study Area. It includes a general overview of the alternatives, specific information for each alternative, and a brief overview of the Chippewa National Forest. 3.1.1.1. Overview of the Study Area The Study Area consists of a mixture of forested areas, with areas of residential settlement and agriculture. The Project also would require crossing of the Mississippi River, and would cross or pass near a number of other water bodies and recreational trails, important focuses of recreational use throughout the Study Area. The area is crossed by transportation and utility corridors, including U.S. Highway 2, county roads 57 3.1 Aesthetics Bemidji – Grand Rapids Transmission Line February, 2010 Draft EIS municipal roads, forest roads, pipelines, transmission lines, and railroads.