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111 Mr. Scott Harlicker January 21, 2002 Page Two • There is only one access from the proposed plat onto Tyler Street. That is at the northern portion of the development. The access point lines up with the northern access from Elk River Business Park. Left turn lanes for turning vehicles into Trott Brook Crossing are established at this point. The southerly access from Elk River Business Park also has left turn lanes established for access into Trott Brook Crossing. However, the Developer has indicated that the gas line easement and the elevation of Tyler Street make it impossible to have a road connection at this point. Therefore, the Developer has shown an emergency access from the cul-de-sac to Tyler Street. This must be paved to a width of 10 feet so that it can act as a pedestrian trail. We will work with the Developer's engineer to design an emergency access that is suitable for the largest emergency vehicles that may need to use it. At a minimum, the width needed for emergency vehicles is 20 feet. • The left turn lane on Tyler Street at this southerly access point will need to be removed by this development. • The townhome ordinance requires a 30-foot setback from the curb line on private drives to the buildings. The 8-plexes at the northwest corner of this development do not currently meet this setback. The building arrangements will need to be adjusted ID to maintain a minimum of 30 feet from the curb line on the private drives to the buildings. C. GRADING, DRAINAGE, AND EROSION CONTROL PLAN • Where Street C hits the south plat boundary as it would enter into the Brown property further to the south, it appears to be at a poor location. From the little bit of topography shown, it appears that the street location will fall on the side of a hill located on the Brown property. Additional information needs to be provided to definitively show that this street location will not cause development problems on the Brown property. If it will cause development difficulty on the Brown property, the location where Street C hits the south plat boundary needs to be modified. • Additional storm sewer structures need to be placed in Street E to catch runoff from the 8-plexes prior to discharging into Street E. It appears the proposed storm sewer route can be adjusted to hit Street E with appropriately placed catch basins. • We question whether or not a permit from the gas company can be obtained for the storm sewer line from Street D to Street E. The storm sewer line is shown on the gas line easement boundary. Therefore, construction of this line would require digging in the gas line easement parallel to the gas line. • It appears that the driveway for Unit 11 and for 8-plex building #2 are somewhat flat. These two areas should be looked at and building elevations adjusted as appropriate. • There are a number of areas where cross-lot drainage will not follow the prescribed • drainage and utility easements. In these cases, additional drainage and utility easements will need to be provided to accommodate these drainage patterns. Howarc R. Green Company Ltr 1-21-02 Harlicker.rev CONSULTING ENGINEERS