Agenda - Economic Development Authority - 10/09/2014

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CONCEPTS CONSIDERED to be shared publicly or with elected officials as part of the Highway 10 Access Study, they are reflective of the input received from property and business owners as part of this study. The City of Ramsey may wish to use these as a starting point in convening a future Tungsten St. subarea study. Approach 2 and 3 1. High T at Sunfish Lake Blvd. - Projects 4-2-1 and 4-2-2a One concept to provide continuous, uninterrupted flow for eastbound and westbound through traffic along Highway 10 would be a High T. Westbound Highway 10 would be elevated above Sunfish Lake Blvd. with exit and entrance ramps for westbound traffic. The southbound left and eastbound left movements would remain signalized under the overpass and eastbound through traffic becomes a free movement. This concept would reduce access at the intersection by removing the north and south through movements along with the northbound and westbound left turns. Project 4-2-1 could be built first and would provide operational and safety benefits mostly for westbound traffic while maintaining full access at the intersection. Project 4-2-2a would follow to convert the intersection to a high T and reconstruct eastbound Highway 10 from east of Sunfish Lake Blvd. to the Anoka Technical College. 2. Eastbound and Westbound Flyovers at Sunfish Lake Blvd - Projects 4-2-1 and 4-2-2b This concept would again start by building a westbound overpass in project 4-2-1 but would follow with a similar overpass for eastbound traffic. The advantage of this end treatment would be that the intersection retains full access while still providing uncontrolled movements for mainline through traffic. Project 4-2-1 would be constructed first and Project 4-2-2b would follow to build the second flyover. The eastbound flyover could be built at the same time as the westbound flyover which could reduce construction costs due to less retaining wall structures and shorter bridge spans. 3. Sunfish Lake Blvd Overpass with Right-In/Right-Out - Projects 4-3-1 and 4-3-2 A third alternative for providing eastbound and westbound continuous flow along Highway 10 would be to elevate the local street and build a bridge for Sunfish Lake Blvd.. Sunfish Lake Blvd. traffic would access Highway 10 via right-in/right-out access and the intersection would continue to serve all traffic movements. This alternative would provide another grade -separated crossing of the railroad as well. This concept does have a couple of known issues. The distance between Highway 10 and Riverdale Dr. is difficult to bring the roadway profile down to grade from the overpass height. The maximum grade would be 7 percent to match in. The maximum grade to come down to the north off of the railroad bridge is also over 7 percent to minimize impacts to the McKinley St. intersection. Another issue with the concept is how traffic would be carried from Sunfish Lake Blvd. to Highwayl 1. The concept would divert the arterial roadway to Riverdale Dr., which is a local street. The County would have to end the CSAH designation of Sunfish Lake Blvd. at Bunker Lake Blvd. or upgrade the connection all the way to Highway 10 for continuity purposes. As a State -Aid Highway, Sunfish Lake Blvd. (CSAH 571 cannot terminate at a local street. Another option to consider would be a realigned concept or modification of land use around the intersection to provide a buffer between highway and residential land uses, eliminating direct driveway access. This concept requires further study in the future. HIGHWAY 10 ACCESS PLANNING STUDY 57