City held its annual Measure D public workshop with the Council’s
Franchise/Public Infrastructure Subcommittee on the evening of January 22,
2020, with participation from numerous interested residents. City staff
presented a five-year pavement preservation program to the subcommittee which
included the following:
Staff proposed this as a five year rolling program of pavement preservation work that will add a new fiscal year into the program as each annual pavement preservation project is completed.
After receiving the five-year pavement preservation program and receiving comments from the public, the Subcommittee recommended that City Council adopt the proposed five-year pavement preservation program and approve the recommended, year one, FY 2020-2021 Measure D Annual Pavement Preservation Project. On February 5, 2020, the Council by motion approved the Subcommittee’s recommendations to adopt the proposed five-year pavement preservation program and to approve the FY 2020-2021 Pavement Preservation Project. The recommended repair strategies and treatments for the streets selected for the FY 2020-2021 project include the following:
- Method 1: Crack Seal
Placement of specialized asphalt emulsion into lateral and horizontal cracks that develop in asphalt as it ages. The crack seal prevents water from seeping into the streets structural section (base rock) and destroying the street’s structural integrity and strength from within. Crack sealing is often performed prior to micro-surfacing, chip seals, or cape seals. The combination of these treatments is less expensive than an overlay which typically requires edge grinding and may include crack sealing.
- Method 2: Micro Surface (Slurry Seal)
Seal coat the street surface with fine aggregate infused asphalt emulsion to preserve the wearing surface of the street and prolong the street’s service life.
- Method 3: Rubberized Cape Seal
Repair minor localized defects in the street by milling and backfilling with new asphalt “plugs” then placing a layer of rubber infused asphalt emulsion on the street surface to seal cracks and weatherproof the surface while immediately covering the asphalt.
- Method 4: Edge Grind with Asphalt Overlay
Repair localized defects in the street by milling and backfilling with new asphalt “plugs” then edge grinding at the gutter lip on both sides of the street and layering a new layer of asphalt (Typically 2” thick) over the surface of the street from edge to edge. Emulsion with pre-coated, rubberized, 3/8” aggregate chips and power rolling them into the hot asphalt emulsion. The new chipped street surface is power rolled and power swept numerous times to remove loose chips. The chipped surface is left to cure for up to fourteen days and then is coated with a micro surface seal coat to provide a smooth driving surface.
- Method 5: Street Reconstruction
The complete reconstruction of a street that has reached the end of its service life and can no longer be successfully maintained or rehabilitated. The work includes removing or grinding the street surface and structural section and replacing both with either reconditioned materials (Full Depth Reclamation) or new materials (Reconstruction).
FY 2020-21 Pavement Preservation Project has been designed and the plans and
specifications that make up the project bid package were approved by the
Council on February 24, 2021 as well as the authorization for staff to bid
the project. Staff expects to receive bids for this project on March 23,
2021. The project will be constructed in spring of 2021.