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I I. I I I I I I I .. I I I I I I .. I I Indicators . Extent to which the transportation network follows natural contours and minimizes the need for major site grading or wetland mitigation. . Extent to which the roadway network avoids sensitive natural areas, wildlife habitats and corridors, steep slopes, unique vegetation and other easily damaged natural features. . Extent to which the roadway network capitalizes on opportunities to create interesting visual experiences such as vistas, elements of surprise, etc. . Extent to which retention ponds and NURP ponds are needed to control stormwater drainage. All Plans: By preserving the open-space framework, the plans keep roadways and intense uses away from sensitive lands such as Marsden Lake, turtle habitat and nesting areas, and the kame. Only one drainage swale near Rice Creek would be crossed by a road. Removal ofHamline A venue from long-term development plans will help preserve prairie areas containing threatened vegetation. The most intense uses are located in the western and southern portions of the site, where contours are fairly level and soils are stable. Roadways in the residential areas (east-central portion of the site) and the trail system are most likely to provide scenic vistas and visual relief. Office/Industrial: The more impervious surfaces introduced to a site, the greater the need for stormwater containmcnt and the greater the danger of on-sitc pollution. Because this plan would generate the most impervious surface area, it would also require the largest storm-water drainage system. This is only hinted at in the present plan. However, additional retention facilities might also create additional site amenities. The north-south through-road, as it curves west and north around the kame, would provide some interesting vistas and revelations. Overall rating: Fair Town Center: This plan, too, would require more retention area than is now shown; however, the amount of impervious and partly-impervious surface would be somewhat lower than in thc Office/Industrial plan. The north- south collector, because it is farther from the kame, would not provide the same level of scenic opportunity. Overall rating: Fair Open Space: This plan, which shows extensive retention ponding, might not need all of it, as the coverage by impervious and partly impervious surfaces would be dramatically reduced. The amount of road shown in this scenario is substantially less than that in any of the others. However, no roadway offers significant visual interest; this interest would be provided by trails linking the various kinds of recreational areas. Overall rating: Excellent Residential: Although coverage by impervious surfaces is somewhat reduced in this plan, partly impervious surfaces (e.g., lawns) would increase. Again, retention needs have probably been understated. Residential roads would provide the most interesting views. Overall rating: Fair TC5 Will site development overburden the regional highway network? Indicators . Extent to which traffic loads generated by the plan would cause traffic on regional roadways to exceed their capacity. . Extent to which the plan can accommodate alternative transportation modes (e.g., public transit, bicycle commuting, etc.) lhatreduce automobile use. All Plans: Each of the concept plans was developed to provide potential for alternate transpor-tation modes, such as public transit and bicycle movements. Overall rating: Excellent Office/Industrial: This plan would add about 50,000 vehicles per day to 1-35W -- the equivalent of at least one additional lane of traffic in each direction. It would have similarly negative impacts on US 10 and CSAH 96, which would require major improvements. Overall rating: Poor Camiros, LJd./SEH. Inc./LHDL, Ltd. TCAAP Framework Plan Page 17 Chapter IV