Adopt Resolution #22-150 Approving Plans and Specifications and Authorizing Advertisements for Bids for Autumn Heights Street Reconstructions, Improvement Project #22-02

Purpose:
The purpose of this case is to adopt Resolution #22-150 Approving Plans and Specifications and Authorizing Advertisements for Bids for Autumn Heights Street Reconstructions, Improvement Project #22-02.
 
Background:
City Improvement Project 22-02 proposes to reconstruct the streets within the Autumn Heights subdivision, generally located along both sides of Armstrong Boulevard between the 167^th and 169^th blocks. The streets total approximately 8,500 linear feet (1.61 miles) in length, and are 24-foot wide rural section with drainage swales along both sides of the streets. A street segment summary is attached to this case.
 
Project History

• 2022 – 2031 Capital Improvement Program – listed as street reconstruction for 2022
• Resolution #21-194, adopted July 13, 2021; City Council ordered the City Engineer to request proposals for Topographic Survey, Geotechnical Evaluations and Utility Testing for 2022 Pavement Management Program projects.
• Resolution #21-224, adopted August 10, 2021; City Council awarded a proposal to Hakanson Anderson for Topographic Survey, and Haugo Geotechnical Services for a geotechnical report of the project area.
• Resolution #21-300, adopted October 26, 2021; City Council ordered the City Engineer to prepare plans and specifications for the improvement project.
• June 21, 2022; Public Works Committee gave recommendations for City Council approving plans and specifications and authorizing advertisement for bids for Autumn Heights Street Reconstructions, Improvement Project #22-02.

 
Pavement History
The streets within the subdivision were built between 1977 and 1988. Pavement maintenance has included an initial round of crack seal / seal coat improvements, and overlay between 1990 and 2002, followed by 2 more rounds of crack seal / seal coat improvements in 1997 and 2004. Maintenance crews have performed patching over the last several years, including extensive spray patching. 2021 PASER values were 2 for all street segments. PASER values of 2 are as low as any street segments within the City.
 
Ground Penetrating Radar (GPR) was performed on the street segments. Bituminous pavement thickness averages were between 3.3 and 3.9 inches thick on the various street segments. Aggregate base thickness was found to vary between 3.1 and 4.0 inches thick. The weighted average total section thickness was 7.0 inches.
 
Proposed Improvements
Staff review of the geotechnical report found the majority of sub-base material to be poorly graded sand and poorly graded sand with silt, these materials are well suited for pavement support and are considered non-frost susceptible and are also free draining materials. An approximately 600-foot section of 167^th Lane east of Armstrong Boulevard found undesirable materials in the top 3 feet of sub-base. These materials are proposed to be replaced with 2 feet of select granular material on top of geotechnical fabric.
 
For the project east of Armstrong Boulevard, Staff is proposing to use the current standard City pavement section of 4 inches aggregate base, and 3.5 inches new bituminous pavement. The 4 inches of aggregate base is proposed to be composed of recycled reclamation material.
 
For the project west of Armstrong Boulevard, Staff is proposing to use a modified reclamation rehabilitation. This will include reclamation of the existing bituminous and underlying aggregate base, removal of 2 inches reclamation material, and placement of 2 inches new bituminous pavement. This will leave 4 to 5 inches of reclamation material in place as support for the new 2 inches of bituminous pavement. This method will remove the need to remove and replace driveway tie-ins, and greatly reduce the required boulevard restoration.
 
This project proposes to add a half cul-de-sac to the dead end on 169^th Avenue west of Rabbit Street. The half cul-de-sac can be constructed within the existing right-of-way on the south half of 169^th Avenue. Extensive review found no right-of-way or roadway easements currently exist for the north half of 69^th Avenue. Internal Staff discussions with public safety and public works support this proposed improvement. Any improvements beyond the existing roadway would require easements, and would have severe impacts on the property along the north side of 169^th Avenue.
 
The current swales along the streets are not proposed to be re-graded as part of this project, no issues with the drainage was discovered during project design. The existing metal culverts crossing the streets east of Armstrong Boulevard are proposed to be removed and replaced. This is to ensure the culverts will last at least through the proposed 60-year design life of the fully reconstructed streets. The culverts west of Armstrong Boulevard are proposed to remain in-place. The existing culverts are adequately functioning and are anticipated to last the design life of a reclamation rehabilitation project.
 
Build Process

• Install traffic control measures
  • These are maintained throughout the project
• Install erosion control measures
  • These are maintained throughout the project
• Project removals (streets east of Armstrong Blvd)
  • Perform and subsoil corrections
• Place new concrete curb and gutter (approx. 400-foot section of 167^th Lane west of Armstrong Blvd)
  • Existing bituminous curbing will not hold up to reclamation process
• Remove excess reclaim material, shape and compact remaining material
  • Remove approx. 1.5 inches on streets east of Armstrong Blvd
  • Remove 2 inches on streets west of Armstrong Blvd
  • Excess reclaim is stockpiled and will be used on future City projects
• Place first lift of bituminous pavement on streets east of Armstrong Blvd
• Finish driveway repairs
• Restore the boulevard in any impacted areas
  • 4 inches topsoil, seed and hydro-mulch
  • Due to project timing, dormant seeding may be required
• Traffic Control devices are removed as the project allows
• Place the final lift of bituminous pavement

• Erosion control measures are removed after restoration has been completed

 
Preliminary Schedule Remaining

• Council Approves Plans and Specifications / Authorizes Ad for Bids
  • June 28, 2022
• Staff Receives Bids
  • August 3, 2022
• Council Awards Contract to the lowest responsible bidder
  • August 9, 2022
• Contractor begins construction
  • August 2022
• Contractor Substantially Completes construction
  • October, 2022
• Contractor Final Completion (project clean up, punch list created)
  • Spring 2023

 
Staff proposes to open bids on August 3, 2022, and to present the bid results to City Council on August 9, 2022 for award of a construction contract to the lowest responsible bidder.
 
Final plans are not attached to this case to prevent potential bidders from downloading plans attached to the case to prepare and submit their bids, rather than purchasing the plans through QuestCDN, the electronic bidding software used by the City of Ramsey. This ensures all bidders are bidding off the same set of plans, and all bidders are notified of any plan revisions (addenda) issued during the bidding process. Attached is the title sheet showing the scope of the improvements, as well as a plan sheet showing the typical sections, which includes information on the proposed pavement section. Plans are available upon request from the City Engineer.

If Council approves plans and specifications and authorizes advertising for bids, bids will be advertised on Friday, July 1, and again on Friday, July 8, 2022, both in the City’s official newspaper, the Anoka Union Herald, and in Finance & Commerce.
 
Additionally, letters will be mailed to property owners with updates on the project status. Engineering Staff maintains a project webpage, which will be updated as new information is made available throughout the project.

Motion to adopt Resolution #22-150 Approving Plans and Specifications and Authorizing Advertisements for Bids for Autumn Heights Street Reconstructions, Improvement Project #22-02.

Funding for this improvement is proposed to come from Pavement Management Funds and Stormwater Utility Funds.
 
Staff has completed an estimate based on the final plans and anticipated 2022 construction costs, with a total estimated project costs of $1,156,647.01, which includes 23-percent indirect costs for administrative, engineering, finance, and legal costs.
 

• Street Construction Costs       $888,195.42
• Storm Sewer Costs                 $52,168.00
• Indirect Costs                          $216,283.59
• Total Estimated Project Costs $1,156,647.01

 
In comparison the total estimated cost to complete the standard reconstruction across the entire project, as opposed to a reclamation rehabilitation on the streets west of Armstrong Boulevard was $1,475,337.15.

Staff recommends adopting Resolution #22-150 Approving Plans and Specifications and Authorizing Advertisements for Bids for Autumn Heights Street Reconstructions, Improvement Project #22-02.
 
The Public Works Committee (PWC) reviewed the Autumn Heights Street Reconstructions project on June 21, 2022 and recommended the City Council approve the plans and authorize advertisements for bids. Additionally, the PWC recommended Staff modify the plans to include a modified pavement section for the project streets on the west side of Armstrong Boulevard, which have good subbase material. This modified pavement section is described in the case background, under the proposed improvements section.

Adopt Resolution #22-150 Approving Plans and Specifications and Authorizing Advertisements for Bids for Autumn Heights Street Reconstructions, Improvement Project #22-02.