Agenda - Public Works Committee - 09/17/2024

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6. 1. Public Works Committee Meeting Date: 09/17/2024 Primary Strategic Plan Initiative: Address infrastructure needs. Title: Update on the Pavement Management Program Purpose/Background: Purpose: The purpose of this case is to update the Public Works Committee on the Pavement Management Program. Background: Pavement Management: The success of the City's Pavement Management Program (PMP) is dependent upon many factors including but not limited to: planning and programming, design requirements and initial construction practices, pavement maintenance and rehabilitation, and economics. Failure in any of these key areas may result in pavement useful life being shortened. Many other factors affect the useful life of a pavement and the potential maintenance and rehabilitation actions required. These can include existing sub -grade conditions, drainage patterns, materials and previous maintenance practices to name a few. Recent Achievements: Over the last decade the City has reconstructed 27.2 miles (14.8-percent) of City streets and overlayed an additional 24.05 miles (13. 1-percent) of City streets. The City has incorporated several techniques to cost- effectively rehabilitate failing pavement. These techniques include traditional reconstructions which remove and replace the entire pavement and aggregate base section, full -depth reclamations which recycle the existing pavement and aggregate base, stabilized full -depth reclamations which inject a stabilizer into the recycled base (gaining design strength), reclamation rehabilitations which recycle the pavement and build a slightly thinner pavement section (requires excellent sub -base material), and mill and overlay improvements which only replace the wearing course. Within this inventory of projects, specific site conditions can also influence the pavement reconstruction process (from existing utilities and drainage to existing sub -soil conditions); truly no two projects are the same. Pavement Design Life: The City's goal is to have a 60-year design life for newly constructed and reconstructed pavements. Assuming a fully funded PMP and pavement maintenance the following process describes the anticipated 60-year design life: • Year 0 — New Construction or Reconstruction • Year 2 —Pavement Rejuvenator (Pavement Maintenance) • Year 3 — Crack Seal (Pavement Maintenance) • Year 7 — Crack Seal (Pavement Maintenance) • Year 14 — Crack Seal (Pavement Maintenance) • Year 20 —Pavement Overlay No. l • Years 21 to 39 — (Pavement Maintenance) • Year 40 —Pavement Overlay No.2 • Years 41 to 59 — (Pavement Maintenance) • Year 60 Reconstruction Pavement Rating: The City evaluates the condition of the pavement on an annual basis, generally following the Pavement Surface