Douglas County Pavement Management Douglas County Public Works June 26, 2013 June 2013 Douglas County Public Works 1
Overview Pavement Management Concepts Pavement Condition Index (PCI) Overall Paved Network Condition Budget Scenarios June 2013 Douglas County Public Works 2
What is Pavement Management? An objective process for: Making the most effective use of available funding Understanding the consequences of alternate strategies Quantifying the value of pavement assets Determining your pavement-related needs Communicating with decision makers June 2013 Douglas County Public Works 3
Levels of Pavement Management Network-Level Program-Level Project-Level June 2013 Douglas County Public Works 4
Network-Level Management Planning Budgeting Estimating Pavement Needs Setting Goals Measuring Performance Identifying Trends June 2013 Douglas County Public Works 5
Program-Level Management Developing Lists of candidate projects Analyzing the impact of changing projects or treatments on overall condition Maintaining a list of backlog projects June 2013 Douglas County Public Works 6
Project-Level Management Determining the cause(s) of a premature failure Gathering data for pavement design Designing pavements Evaluating materials, specifications, construction techniques Measuring impact of traffic, climate, materials Research June 2013 Douglas County Public Works 7
Pavement Management Philosophy Cost-Effective Time for 100 Preventive Maintenance Good Satisfactory 80 PAVEMENT CONDITION Cost-Effective Time Fair for Rehabilitation 60 Poor 40 Costly Time for Rehabilitation Very Poor or Reconstruction 20 Serious Failed 0 0 5 10 15 20 AGE June 2013 Douglas County Public Works 8
Douglas County Road Mileage Paved – 171 miles Grindings – 43 miles Gravel – 17 miles Not Accepted for Maintenance, Douglas County, 177.05 231.05 NDOT, 101.85 GID's, 138.19 Towns, 39.98 Private & HOA's, 106.05 Total Miles ~795 June 2013 Douglas County Public Works 9
Pavement Inventory 171 miles (paved) 465 pavement sections Network Level Inspection Sampling Method (1,365 S.U. inspected) No. Sample Units to Total No. Sample Units Inspect 1 to 5 1 6 to 11 2 11 to 15 3 16 to 40 4 over 40 10% June 2013 Douglas County Public Works 10
PCI Inspection June 2013 Douglas County Public Works 11
Visual Example of PCI Scale PCI = 98, Jacks Valley Road June 2013 Douglas County Public Works 12
Visual Example of PCI Scale PCI = 60, Hermosa Court June 2013 Douglas County Public Works 13
Visual Example of PCI Scale PCI = 9, Waterloo Lane June 2013 Douglas County Public Works 14
Pavement Condition Results (2010) Failed Serious Good Very Poor 2% 6% 17% 9% Poor Satisfactory 19% 24% Fair 23% Network Area-Weighted PCI in 2010 = 62 (Fair) June 2013 Douglas County Public Works 15
PCI vs. Repair Type PCI Repair Type 81-100 $ Preventive Maintenance 66-80 51-65 Major Rehabilitation 41-50 0-40 Reconstruction $$$$ June 2013 Douglas County Public Works 16
Development of a Pavement Program Assess current and projected future conditions throughout the pavement network. Develop a plan to address Failed roads Preservation needs Long-term rehabilitation needs June 2013 Douglas County Public Works 17
Pavement Maintenance Strategies Routine/Localized Maintenance Strategies Crack Filling Patching Shoulder Grading Preventive/Corrective Maintenance Strategies Chip Seals Slurry Seals Thin Overlays Rehabilitation and Reconstruction Thick Overlays Reconstruction
Pavement Condition Index June 2013 Douglas County Public Works 19
Adopted PCI Goal = 70 Adopted Priority Matrix Budget PCI Arterial Collector Local Category 4 5 6 Routine 0.0% 5.2% 11.9% 86-100 Maintenance 1 2 3 Preventative 56-85 0.7% 21.2% 25.3% Maintenance 7 8 9 0-55 0.0% 12.3% 23.4% Major M&R 1 = Highest Priority, 9 = Lowest Priority % Network Pavement Area
Budget Analysis June 2013 Douglas County Public Works 21
Budget Summary Network Area- Weighted PCI Condition Backlog in Budget Scenario Annual Budget in 2022 Category 2022 Current Funding $ 1,800,000 54 Poor $51 M Maintain PCI $ 4,800,000 58 Fair $42 M PCI 70 $ 6,100,000 70 Satisfactory/Fair $22 M No Backlog $ 7,700,000 77 Satisfactory $0 M Backlog, or deferred maintenance, is the estimated cost to rehabilitate pavements with a PCI < 55. This is work that is needed but not funded. Adopted PCI Goal = 70
Budget Allocation Example Stop Gap and Global & Network Area- Budget Routine/Localized Preventive/Preventive Weighted PCI in Backlog in Allocation Maintenance M&R Major M&R Total 2022 2022 Current $ 700,000 $ 375,000 $ 725,000 $ 1,800,000 54 $51 M Maintain PCI $ 1,250,000 $ 2,750,000 $ 815,000 $ 4,815,000 58 $42 M PCI 70 $ 1,000,000 $ 2,800,000 $ 2,280,000 $ 6,080,000 70 $22 M Notes: 1. Allocation between budget categories changes from year to year. 2. Analysis is sensitive to allocation of funding among work types. 3. Need to continue with inspections and update database, policies, budgets, etc. (feedback). June 2013 Douglas County Public Works 23
Funding Comparison Miles Maintained Approximate Annual Preventive Maintenance Paved/ Funding (not including Total Per Agency Chip Seal Grindings Gravel/Dirt Total routine maintenance) Mile Douglas County 171 43 17 231 $300,000 to $350,000 $1,515 Lyon County 285 10 248 543 $1,400,000 to $1,800,000 $3,315 Town of Minden 14.5 0 0 14.5 $300,000 to $500,000 $34,482 Town of Gardnerville 20 0 0 20 $300,000 to $500,000 $25,000 Gardnerville Ranchos 43 0 0 43 $500,000 to $900,000 $20,930 GID Kingsbury GID 22 0 0 22 $600,000 to $750,000 $34,090 Round Hill GID 4.4 0 0 4.4 $200,000 to $250,000 $56,818 June 2013 Douglas County Public Works 24
? June 2013 Douglas County Public Works 25
Ideal Road Maintenance Program Service Life = 20 years Extended "Maintenance" Life = 40 years $6,480/Mile of Road for Routine Annual Maintenance $6,480/Mile of Road for Routine Annual Maintenance Year 0 Year 3 Year 6 Year 10 Year 20 Oil Road Every Three Years $10,000/mile Oil Road Every Three Years $10,000/mile Surface Seal $50,000/mile Surface Seal $50,000/mile Every 10 Years Every 10 Years Day One of Road Overlay $175,000/mile At 20 Reconstruct Road Years $750,000/mile at 40 Years Equivalent Annual Cost = $24,314.50 per mile of paved road 211 miles of paved/gringings roads = $5,130,360 / year budget required Assumes Roads are in New Condition at Day One Excludes Equipment Replacement Costs June 2013 Douglas County Public Works 26
PCI Rating Scale PCI Rating 85-100 Good 70-85 Satisfactory 55-70 Fair 40-55 Poor 25-40 Very Poor 10-25 Serious 0-10 Failed June 2013 Douglas County Public Works 27
Pavement Condition Results 80 70 Network Area-Weighted PCI = 62 (Fair) 60 Area-Weighted PCI 50 40 30 20 10 0 Foot John MnGv NC Ranc SC Taho 69 74 53 51 52 29 71 Wt Avg Condition County Area June 2013 Douglas County Public Works 28
Pavement Management System System to collect pavement condition data Database to store and sort collected data Analysis program to evaluate repair and preservation strategies and cost effectiveness Evaluate budget consequences Evaluate “what if” questions Micro PAVER June 2013 Douglas County Public Works 29
Why Micro-Paver? Developed by the Army Corps in the late 70’s Recommended by APWA (American Public Works Association) Optimizes funds allocated for M&R Utilizes the Pavement Condition Index (PCI) methodology PCI became and ASTM standard in 1999 June 2013 Douglas County Public Works 30
Road Maintenance Zones 1. Lake Tahoe 2. North County 3. Foothill 4. Johnson Lane 5. Minden/Gardnerville 6. Ranchos 7. South County June 2013 Douglas County Public Works 31
Example Sample Unit Layout June 2013 Douglas County Public Works 32
County Maintained Roads by Zone 35 Percent of Total Pavement 30 25 20 Area 15 10 5 0 Foot John MnGv NC Ranc SC Taho 13 32 29 9 12 2 2 Pct Area County Area June 2013 Douglas County Public Works 33
Pavement Condition Index (PCI) Visual Condition Survey 20 Distress Types (AC) Severity Level Quantity U.S. Army Corps of Engineers ASTM Standard D6433 Adopted by American Public Works Association June 2013 Douglas County Public Works 34
Pavement Inventory 171 miles (paved) 465 pavement sections Network Level Inspection Sampling Method (1,365 S.U. inspected) No. Sample Units to Total No. Sample Units Inspect 1 to 5 1 6 to 11 2 11 to 15 3 16 to 40 4 over 40 10% June 2013 Douglas County Public Works 35
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