Agenda - Public Works Committee - 12/03/2013

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still allow full access to/from CSAH 5/Nowthen Boulevard. • 15200 Nowthen Boulevard NW — Access to be restricted from full -access to right-in/right-out only. • 15220 Nowthen Boulevard NW — Access to be restricted from full -access to right-in/right-out only. • 15250 Nowthen Boulevard NW — Access to be relocated from Nowthen Boulevard to Alpine Drive (remains full -access). • 15243 Nowthen Boulevard NW — Access to be restricted from full -access to right-in/right-out only. The intersection of old CSAH 5/Nowthen Boulevard and new CSAH 5/Nowthen Boulevard just north of Alpine Drive will be disconnected and the south end of old CSAH 5/Nowthen Boulevard will be converted into a dead-end road with a "T" turn -around to accommodate snow plow and emergency vehicle access. All traffic will then access CSAH 5/Nowthen Boulevard at the current intersection with old CSAH 5/Nowthen Boulevard approximately one -quarter mile north of Alpine Drive. To address safety concerns due to restricted sight -lines at this intersection as noted by numerous residents during the public Open House, Anoka County will construct a bypass lane along southbound CSAH 5/Nowthen Boulevard and will remove numerous existing trees within the County right-of-way. Stormwater ponding — The City owns a 0.57 acre parcel of property in Alpine Acres in the northwest quadrant of the intersection that is dedicated in a plat as parkland. According to Anoka County, the property has an assessed value of $3,300 and a portion of the property is classified as wetland. Anoka County is proposing that the city provide a drainage easement over the entirety of this parcel to allow the County to use this parcel for stormwater ponding to offset the additional impervious area created by this project. Due to access and grading issues associated with the potential development of this site as parkland, and because an opportunity exists at this time to exchange the use of this parcel for costs related to construction of a missing trail connection north of Alpine Drive between Krypton Street and CSAH 5/Nowthen Boulevard, staff recommends providing Anoka County with the requested drainage easement over this parcel. Trail connection — As noted above, city staff recommends working with Anoka County to provide a drainage easement over the 0.57 acre parcel of city -owned property in Alpine Acres, which is platted as parkland, for the County's use as a stormwater ponding facility. This will be in exchange for Anoka County preparing the plans and specifications and procuring the necessary right-of-way and temporary construction easements to allow a missing trail connection approximately 700 feet in length to be constructed north of Alpine Drive between Krypton and CSAH 5/Nowthen Boulevard. The existing trail currently ends approximately 100 feet west of Krypton Street. Staff from Anoka County will be meeting with the abutting property owners to discuss associated tree removal and right-of-way/easement needs. The estimated construction costs for the trail connection is $17,000. Additional costs for the necessary right of way (+/- 2 feet of right-of-way and temporary construction easements) and compensation for tree removals, etc. is unknown at this time as the County is just beginning to complete appraisals. Anoka County designed the trail connection and incorporated it into their construction plans at no cost to the City, and Anoka County will bid and inspect the trail during construction, all of which provide additional benefit to the City. The County therefore proposes the following cost sharing methodology related to the stormwater ponding and trail connection. The City will provide the necessary drainage easement over our 0.57 acre platted parkland property as discussed earlier, which would allow the County to use the land for stormwater ponding for the proposed intersection improvements. The County will then pay for the necessary right-of-way and easements to construct the trail and the City will pay all costs to construct the trail per the County's standard cost share policy. The County will also agree to apply federal funds to the trail (federal funds are currently covering about 60% of construction costs), instead of requiring the City to pay for 100% of construction costs per standard practice for work not required for their project. This will result in an estimated cost of $6,800 for the city to construct the trail connection during this project. Watermain loop connection — City staff recommends constructing a watermain connection to loop the watermain system in this area to provide additional flexibility for maintaining the trunk watermain lines. The watermain would be constructed under the new