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addition of the left turn lane, the proposed street will be 44 feet wide. The 44 foot <br />wide street section will match the existing street width of Marketplace Drive. <br />As stated, the proposed realigned 77th Street will be constructed with the City <br />Standard street section. The street section includes 3.5 inches of bituminous <br />pavement, 5 inches of Class 5 aggregate base, and 24 inches of select granular <br />borrow sub -base. However, since the project area contains a significant amount <br />of native granular soils, it is being proposed to construct the roadway with <br />12 inches of select granular borrow. It is recommended that soil borings be <br />obtained along the proposed roadway alignment to evaluate the subsurface soils <br />prior to proceeding with final design. <br />The street improvements also include removing the existing right turn lane <br />located within Lake Drive at the intersection of 77th Street. It is then proposed to <br />construct the right turn lane within Lake Drive at the new intersection with the <br />realigned 77th Street. The right turn lane construction will include removing the <br />existing curb along Lake Drive and then widening the existing shoulder to <br />establish a new 12 foot wide right turn lane with concrete curb and gutter. The <br />proposed right turn lane section will match the existing Lake Drive section, which <br />includes 6.5 inches of bituminous pavement and 6 inches of Class 5 aggregate <br />base placed on the native granular soils. Additional granular sub -base will be <br />placed, as required, to maintain the existing roadway grades and elevations. <br />Please note, the previously mentioned improvements within Lake Drive will <br />require approval from Anoka County and are subject to change based on their <br />requirements. <br />B. TRAFFIC SIGNAL MODIFICATIONS <br />The addition of 77th Street as the fourth leg of the Lake Drive and Marketplace <br />Drive intersection will require modifications to the existing traffic signal. <br />Modifications include the relocation of the traffic signal pole in the northwest <br />corner of the intersection to provide the desired offset from the curb for the new <br />southbound right turn lane, the addition and replacement of signal heads for <br />eastbound traffic, the replacement of signal heads for westbound traffic, the <br />addition of an emergency vehicle preemption detector and light, and the addition <br />Feasibility Report 4 13849.006 <br />City of Lino Lakes, Minnesota <br />