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services. City of Arden Hills Public Works staff will televise the sanitary sewer mains in the project area and identify proposed services in need of 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 service. Sanitary services are expected to require no work, grouting, wye replacement, or minor pipe replacement. In the fall of 2022, city public works staff completed preliminary inspections of the project area and identified locations and methods for storm sewer rehabilitations that will be incorporated with the project throughout the project areas. A result of this inspection also determined that the storm sewer catch basins/manholes just prior to each storm system's ultimate outfall into the stormwater ponds should be rehabilitated/replaced to include BMPs (such as including a sump and SAFL Baffle) to capture sediment prior to entering the ponds and allow for more efficient maintenance by public works staff. The ponds' capacities are decreasing and this work will mitigate the amount of sediment entering the ponds. Additionally, storm sewer improvements are proposed near 4242 Norma Avenue to address a drainage concern. City staff indicated stormwater modeling/analysis is not required for this work. As part of the project, the city would also like to dredge out the accumulated sediment in three of the stormwater ponds located around the project area. The ponds are located south of McClung Drive, north of Colleen Avenue, and south of Colleen Avenue (northern portion of the pond). The pond dredging will be a simple process to remove accumulated sediment. The accumulated sediment quantity to be removed will be determined by completing a bathometric survey. Pond sediment sampling, testing, and analysis will be conducted consistent with MPCA standards based on its Managing Stormwater Sediment Best Management Practice Guidance at each of the five identified pond locations to determine the MPCA management level necessary for landfilling the excavated material generated from dredging the ponds. It is assumed that access is readily available to the ponds through existing right-of-way or easements and beyond the pond dredging, only turf restoration of the access route and potentially the pond banks will be necessary for design. Rice Creek Watershed District (RCWD) rules will require consideration on the project, though based on the project being primarily rehabilitation, we understand these rules will not have a significant influence on the project design given the proposed scope. Bolton & Menk's project team will work to identify what potential additional BMP measures will be required based on their rules and how they apply to the project. In addition to reviewing the project documentation, we have visited the site and given consideration to the roadway reclamation process, the existing curbing, pavement condition, temporary water, and drainage improvements wetland delineation needs. Based on review of the National Wetland Inventory (NWI), wetland delineations and associated permitting will be necessary for the pond dredging work. Additionally, our site visit indicated a few specific locations to be analyzed further during the project development: • A potential drainage issue near 4510 Keithson Drive • Significant pavement deterioration for a couple hundred feet on Royal Hills Drive that may require baselsubgrade corrections • Potential to remove or improve the hammerhead turnaround at the Briarknoll Circle and Snelling Avenue N intersection • Potential to extend the project limits to address failing pavement in the Norman Avenue and Dawn Circle intersection We also determined it could be valuable to evaluate potentially changing mill and overlay streets to reclamation streets based on their proximity to one another. A great example of this is changing McClung Drive to a reclamation improvement because it is a continuation of Colleen Avenue that is scheduled for reclamation. This evaluation has the potential to reduce risk such that there is pavement life cycle consistency between adjacent street segments. There may be further efficiencies of installation methods that could even result in cost savings if specialized equipment (a milling machine in this example) is eliminated and no longer needed to mobilize to the project. This will be evaluated in further detail to determine the feasibility of these changes. We understand communication is critical in all aspects of the project. We will follow the city's public involvement process and work closely with city staff throughout all project phases to keep you informed and educated on the design taking place. We will provide requested updates to the city council and work with residents from preliminary design through construction to help assist with their questions and specific needs. We also understand the city's desire to minimize consultant amendments, and as such, we invested significant due diligence in preparation of this proposal in hopes of REHAB TYPE flushing out kedn:Door �\i Full DepthReclamatio potential 1� Mill &Overlay changes before ti Rec°RStIRCI they ever occur. It is never our goal to encumber additional services on a project. Our project team strives to achieve a successful but unsurprising project delivery process. Arden View Or Royal Hills Park n a nntsyry Hill Ln Pao Arden Hills mpmOle Rd sk olleen Ave Indian Oaks Ct Indian Oaks Trl Community O' Gardens a € Floral Park z Royal Ln Rural OrW 50