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The current pavement condition index (PCI) ratings for the proposed project streets range from 17 to 40, except for Karth Lake Circle, which is rated 64. The street pavement surfaces are generally in poor condition and have seen an increased need for maintenance operations which all indicate the pavements are beyond their life cycle and in need of rehabilitation. As part of the feasibility stage of the project, the City of Arden Hills will enlist a geotechnical engineering consultant to complete pavement cores and shallow borings on the project streets and trails which will be used to develop a pavement evaluation report. The report will make recommendations for the rehabilitation method of each street and the trails. It is anticipated that a combination of mill and overlay and reclamation pavement rehabilitation methods will be utilized on the project. Sanitary sewer improvements will generally be limited to the replacement of castings and rings on sanitary structures and select spot repairs. City of Arden Hills Public Works staff televised the sanitary sewer mains in the project area and identified proposed sewer segments in need of trenchless repairs along with the proposed repair method. The Bolton & Menk project team will review the televising and confirm the identified repairs or make recommended adjustments for each identified sewer segment. It is anticipated that no work will be required on sewer service laterals. City public works staff conducted preliminary field inspections of the existing watermains and storm sewer in the project area and identified locations and methods for repairs and/or replacements. Watermain improvements will be limited to gate valve box adjustments, select gate valve replacements or additions, select hydrant replacements or additions, and possible relocation of the watermain along the south side of CSAH 96 which will also be evaluated. City staff indicated they will be completing a follow up field inventory to document all model 59 hydrants in the project areas that will be provided with the intent of replacing the hydrants and their leads. Based on the evaluated conditions, storm sewer improvements will be limited to catch basin/manhole casting adjustments, select structure replacements, potential rehabilitation of existing grit chambers, addition of new storm structure BMPs (such as including a sump and SAFL baffle) to capture sediment prior to entering the lake, rehabilitation to select storm pipe aprons, and riprap rehabilitation at select outlet locations. As part of the project, the city would also like to remove the accumulated sediment in Karth Lake at the five storm sewer outlet locations. The accumulated sediment quantity to be removed at each of the delta locations will be determined by completing a bathymetric survey. It is assumed that the accumulated sediment will generally be contained within an approximate 100-foot radius of the outlet location. Pond sediment sampling, testing, and analysis will be conducted consistent with MPCA standards based on its Managing Dredge Materials Best Management Practice Guidance to determine the MPCA management level necessary for landfilling the excavated material generated from dredging the ponds. Easements exist over the storm sewer outlets, however, the grades down to the lake and private landscaping features may make access to each location difficult or infeasible within the existing easements, especially as it relates to trucking out the excavated sediment. Further, it is noted that completely draining the lake to accommodate the sediment removal is likely not possible and would therefore require specialty construction methods to conduct the operations. These potential obstacles will be evaluated in detail through the feasibility study to determine the practicality and options for the sediment removal operation, as well as identified storm sewer improvements at these locations. 4 2026 PMP STREET AND UTILITY IMPROVEMENTS | CITY OF ARDEN HILLSProject Understanding EXHIBIT A