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2019 Pavement Management Report (PDF) 2019 PAVEMENT MANAGEMENT REPORT CITY OF VADNAIS HEIGHTS 800 EAST COUNTY ROAD E | VADNAIS HEIGHTS, MN 55127 OCTOBER 2019 WSB PROJECT NO. 013883-000 2019 PAVEMENT MANAGEMENT REPORT Table of Contents I. Executive Summary ............................................................................................................................... 1 II. Introduction ............................................................................................................................................ 2 III. Pavement Condition Summary ......................................................................................................... 3 A. Introduction ........................................................................................................................................ 3 B. Existing Pavement Conditions .......................................................................................................... 4 C. Bituminous Pavement Rating Examples ........................................................................................... 5 IV. Maintenance and Rehabilitation Activities ........................................................................................ 9 A. Preventative Maintenance ................................................................................................................. 9 Crack Seal ............................................................................................................................................. 9 Fog Seal ................................................................................................................................................. 9 Chip Seal ............................................................................................................................................... 9 Micro-surfacing ...................................................................................................................................... 9 B. Pavement Preservation ................................................................................................................... 10 Overlay/Mill and Overlay ...................................................................................................................... 10 Texas Underseal .................................................................................................................................. 10 C. Reclamation/Reconstruction ........................................................................................................... 10 V. Pavement Life Cycle ....................................................................................................................... 11 VI. Condition and Budget Scenarios .................................................................................................... 12 A. Condition Performance Analysis ..................................................................................................... 12 B. Maintenance and Repair (M&R) Work Planning Models ................................................................ 13 C. PCI Driven Models .......................................................................................................................... 14 Appendix A .................................................................................................................................................. 15 PCI Map ................................................................................................................................................... 15 Appendix B .................................................................................................................................................. 17 Segment PCI ........................................................................................................................................... 17 Table of Contents I. EXECUTIVE SUMMARY Enclosed is a summary of the pavement management that was performed by WSB for the City of Vadnais Heights. This report gives an overview of the road condition in the City and it is intended to serve as a guidance in pavement management and project planning. Pavement conditions of all the roadways in the City’s network were rated in June 2019. Roadways inspected and evaluated only include bituminous roadways that are maintained by the City. Pavement ratings were completed using PAVER, which is a pavement management software that calculates Pavement Condition Index (PCI) based on the distresses identified in the field. PCI is based on a 0 to 100 scale, with 100 being a road in perfect condition. Any type of road maintenance (i.e. patching or crack sealing) performed prior to inspections would be accounted for in each PCI. The significant findings of the pavement condition are as follows: • There are currently 41 miles of bituminous roadways inspected in the City of Vadnais Heights. • The current weighted average PCI in the City is 73.5 in 2019. • Percentage of bituminous roadways in respective condition category, in terms of length, are as follows: o “Excellent” category requiring preventative maintenance – 30% o “Good” category requiring preservation – 32% o “Fair” category requiring more robust preservation methods – 22% o “Poor” category requiring continuous monitoring – 7% o “Very poor” category requiring reclamation or complete reconstruction – 8% The findings reflect that a majority of the roadways are in good condition. Three scenarios were run to determine the average annual budget required to maintain the streets in the network at different levels of PCI. Maintenance protocol was applied to the roadways based on the visual ratings and unit pricing was obtained based on estimated pricing from several cities in the Metro area. In order to maintain the streets in the City at current weighted average PCI, which is 73.5 PCI, an average annual funding of $1.8 million would be required. An average annual budget of $1.55 million and $2.0 million would be required to maintain the roadways at 68 PCI and 78 PCI respectively. Future references to the dollar amounts contained in this report in reference to maintenance activities would be based on 2019 dollars. Maintaining at a higher level of condition would require a higher annual budget and vice versa. We would recommend the City to at least maintain the roadways at the current condition using the “do best first” approach, which the City would allocate substantial funding to perform preventative maintenance to delay the deterioration of roadways in good condition in addition to conducting preservation, reclamation, or reconstruction to improve the roadway conditions. Section I Page 1 II. INTRODUCTION A pavement management program includes a systematic method of inspecting and rating the pavement condition of roads in a network, followed by performing a cost-effective analysis of various maintenance and rehabilitation strategies, which assists decision makers in making the best decision on the use of available resources. The pavement management ideology, if successfully implemented, can result in drastic improvement of the life cycle costs and performance of the roads. The main objectives of a pavement management program are to maintain a high-level network, evaluate the effectiveness of different alternative, and optimize timing of maintenance and construction activities. These objectives can be met by routinely carrying out inspections and documenting the condition of roads in the City’s network. The data is typically managed within a pavement management software, which can manage, sort, and store the collected information. This Pavement Management Report is comprised of the following components: • a condition report containing an assessment of the current pavement conditions with recommended maintenance and rehabilitation activities based on visual inspections; and • different budget scenarios that can serve as a guidance to the City for future planning and financing of the activities. Decisions made on certain maintenance or rehabilitation activity is recommended to be accompanied by a pavement forensic investigation. Pavement forensics identifies the pavement structure and condition under the visible layer of the pavement, such as the depths of pavement layers, signs of bonding and debonding, and distresses that might not be visible from the surface. Soil borings along the roadways can be used to identify aggregate depths and soil classifications to provide a better understanding of the roadway segments in determining the appropriate pavement rehabilitation technique. Section II Page 2 III. PAVEMENT CONDITION SUMMARY A. INTRODUCTION Pavement Condition Index (PCI) was used to measure pavement condition on a scale of 0 to 100, with 100 being a perfect roadway with no distresses. Engineering staff has established the PCI categories in Table III.A to describe the conditions of the bituminous roadways. Table III.A. PCI condition categories established for the City of Vadnais Heights. Condition PCI Range Recommended Maintenance Strategy Category Preventative Maintenance Excellent 90 – 100 (Crack Seal, Chip Seal, Fog Seal, Micro- Surfacing) 1-inch to 1.5-inch Mill and Overlay, Good 70 – 89 Overlay, Texas Underseal Fair 50 – 69 2-inch or Greater Mill and Overlay Poor 40 – 49 Monitor Very Poor 0 – 39 Reclamation / Reconstruction PAVER, which is an asset management software, was used to record and estimate the conditions of the roadways. The software calculates PCI based on the distress type, distress severity, and distress
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