09-25-2013 Council Agenda - Laserfiche WebLink

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Ramsey County Public Works supports the proposed closure noting that the proposed closure follows access management guidelines. A number of residents in the area spoke in favor of the proposed closure, citing concerns over child safety due to speeding vehicles. A couple of residents spoke in opposition to the closure as well, citing delays in emergency service response time and delays in travel time as their major concerns. Staff is proposing to move forward with the closure of Sunrise Drive at Edgerton Street as part of this feasibility report. 3.2 Street Section Staff is recommending upgrading the existing road sections to a standard street section of 3 -1/2 inches of bituminous and 8 inches of aggregate base throughout the project area. For areas with poor street support or moderately frost - susceptible materials staff is recommending a 24 -inch select granular borrow sub -base with underlying geo- textile fabric. As noted in Section 2.31, the frost susceptible silts and clays were mostly isolated to the northeast regions of the project on portions of Burr Street, Hendry Place, Highway Drive, and Sunrise Drive. In addition to the upgraded street sections, installing drain tile at all low points and catch basin locations is recommended to promote subsurface drainage, minimizing frost heaving action on new pavements. Based on past projects and generalized soils strata descriptions, this study assumed the standard street section for the anticipated future traffic loads, The standard street section, along with a sand sub -base in the northeast regions of the project, was used for calculating the estimated project cost. As noted in Section 2.31, most of the streets in this area consist of full -depth bituminous with no aggregate base. For these streets, staff will include the option of reclaiming the existing bituminous pavement to a certain depth. The reclaim material, subject to engineering specifications and testing, may be suitable for reclaimed aggregate base, pipe bedding, or temporary roadway stabilization. The contractor that chooses to reclaim the roadways would need a plan for temporarily storing the material and keeping it clean. The option of importing aggregate material in lieu of using the reclaim material is included in the cost estimate as well. 3.3 Concrete Curb and Gutter Staff recommends using B618 (Design B on Exhibit 13) barrier concrete curb and gutter for the majority of streets on this project. The B618 design provides the following advantages: 1) Provides a defined area for storm water to flow without damaging the bituminous roadway or causing erosion to neighboring property. 2) Provides edge support and backing to street pavements. 3) Establishes a definite limit to vehicle encroachment onto the boulevard areas, minimizing rutting of grass areas and reducing the probability of vehicles sliding off the roadway under unfavorable pavement and weather conditions. 4) Protects the grass boulevard areas and mailboxes from damage by snowplows. 5) Curb depressions at driveways provide clear identification of the driveways and limits blockage of driveways by vehicles parking on the street. 6) Less chance of a vehicle scraping its bottom with a properly installed driveway opening compared to accessing a driveway with D412 curb. 15 25