City of SomersworthCity of SomersworthPresentation to City Council onPresentation to City Council on

Pavement ManagementPavement Management

Presented by:Presented by:

Joe Ducharme, Jr., P.E.Joe Ducharme, Jr., P.E.

Contract City EngineerContract City Engineer

& &

Britt E. Audett, P.E.Britt E. Audett, P.E.

CMA Engineers, Inc.CMA Engineers, Inc.

Pavement is an AssetPavement is an Asset

► City’s Public Infrastructure Assets City’s Public Infrastructure Assets include:include: Drainage SystemsDrainage Systems ParksParksPaved RoadsPaved Roads Public BuildingsPublic Buildings SchoolsSchools Sewage Treatment Sewage Treatment

Plant Plant Sewage CollectionSewage Collection

SystemSystem SidewalksSidewalks Water DistributionWater Distribution

SystemSystem Water Treatment PlantWater Treatment Plant

Somersworth’s Paved RoadsSomersworth’s Paved Roads

► ~50 miles of paved roads maintained by the City of ~50 miles of paved roads maintained by the City of Somersworth.Somersworth.

► At avg pavement thickness of 4-inches, equates to At avg pavement thickness of 4-inches, equates to more than 180,000 tons of pavement.more than 180,000 tons of pavement.

► Replacement value to reconstruct all paved roads Replacement value to reconstruct all paved roads (including gravel base) ~ $25,000,000 million (including gravel base) ~ $25,000,000 million dollars.dollars.

Preservation vs. Preservation vs. ReconstructionReconstruction

► Uniform pavement surface limits water penetration Uniform pavement surface limits water penetration to road base below (good)to road base below (good)

► Cracked road surface allows water penetration, Cracked road surface allows water penetration, frost heaves, pot holes (bad)frost heaves, pot holes (bad)

► Cost of reconstructing a bad road can be 10 to 20 Cost of reconstructing a bad road can be 10 to 20 times more times more $$$$$$ than surface treatment on a good than surface treatment on a good roadroad

► Good road surface = preserved road base = longer Good road surface = preserved road base = longer service life = lower cost to maintainservice life = lower cost to maintain

Pavement Management PlanPavement Management Plan

► Elements of a PMPElements of a PMP1. road inventory1. road inventory2. road condition2. road condition3. road classification3. road classification4. local repair methods and costs4. local repair methods and costs5. project prioritization5. project prioritization6. funding 6. funding 7. implementation7. implementation8. annual updates to the plan8. annual updates to the plan

Road InventoryRoad Inventory

► ~50 miles of City-maintained paved roads~50 miles of City-maintained paved roads► 3D Laser Imaging – all lanes3D Laser Imaging – all lanes► Imaging linked to GISImaging linked to GIS

coordinatescoordinates

Pavement ConditionPavement Condition

► Pavement Condition Pavement Condition Index (Index (PCIPCI))

► Ranges from 0 to 100 Ranges from 0 to 100 ((higher = betterhigher = better))

► Strive for 75 or higher – Strive for 75 or higher – good/satisfactorygood/satisfactory

► City-wide average City-wide average PCI PCI = 53= 53

PCI Rating Scale

90-10090-100 Good

70-9070-90 Satisfactory

50-7050-70 Fair

40-5040-50 Poor

30-4030-40 Very Poor

10-3010-30 Serious

0-100-10 Failed

PCI DistributionPCI Distribution

PCI RangePCI Range Total Miles Total MilesFailed (0-10)Failed (0-10) 00Serious (10-30)Serious (10-30) 9.39.3Very Poor (30-40)Very Poor (30-40) 7.27.2Poor (40-50)Poor (40-50) 6.96.9Fair (50-70)Fair (50-70) 11.411.4Satisfactory (70-90)Satisfactory (70-90) 9.19.1Good (90-100)Good (90-100) 4.34.3

Willand Drive PCI = 93

Maple StreetPCI = 60

Union StreetPCI = 21

Road ClassificationRoad Classification

► Primary, Secondary, NeighborhoodPrimary, Secondary, Neighborhood► Road Segment Length & WidthRoad Segment Length & Width► Daily Traffic VolumesDaily Traffic Volumes► Critical Routes (school buses; emergency services; Critical Routes (school buses; emergency services;

plowing)plowing)► Business/CommercialBusiness/Commercial

Primary Roads•High Street•Main Street•Blackwater Road•Salmon Falls Road•Indigo Hill Road

Secondary Roads•Maple Street•John Parsons Drive•Willand Drive•Tates Brook Road

Residential Roads•Highland Street•Congress Street•Union Street•Primrose Lane

Local Cost of Repairs Local Cost of Repairs ((2014$)2014$)

► Crack Seal/Fog Seal/Spot RepairCrack Seal/Fog Seal/Spot Repair $$4.00/SY4.00/SY► Surface Treatment (Chip Seal) Surface Treatment (Chip Seal) $$8.00/SY8.00/SY► Shim & Overlay (1”overlay)Shim & Overlay (1”overlay) $$12.00/SY12.00/SY► Mill and 1.5 “OverlayMill and 1.5 “Overlay $$20.00/SY20.00/SY► Full Depth Reclamation w/ SS-1 Emulsion Full Depth Reclamation w/ SS-1 Emulsion

Injection or Portland Cement Injection or Portland Cement $$30.00/SY30.00/SY► Full Box Out and ReconstructionFull Box Out and Reconstruction $$70.00/SY70.00/SY

Establish PrioritiesEstablish Priorities

► Consider road Consider road classificationclassification

► Consider other City Consider other City needs (utilities)needs (utilities)

► Coordinate repairs to Coordinate repairs to leverage funds leverage funds $$$$$$$$$$$$

► Run the PMP programRun the PMP program► Top-Down Approach – Top-Down Approach –

maintain good roads firstmaintain good roads first► Goal is to raise average Goal is to raise average

PCI >= 75PCI >= 75

Life of PavementLife of PavementSource: “For Pavement Preservation” Task ForceSource: “For Pavement Preservation” Task Forcewww.fp2.org

0Years

PC

I (

Pavem

en

t C

on

dit

ion

In

dex)

100

$1 of preventive maintenance

here…

Eliminates or delays spending $8 - $10

on rehabilitation here.

Total Reconstruction $40 +

40% Drop in Quality

75% of Life

40% Drop in Quality

12% of Life

Coordinate RepairsCoordinate Repairs

► Dig the Road OnceDig the Road Once► Consider Pending CIP Projects to leverage other City Consider Pending CIP Projects to leverage other City

FundsFunds

water enterprisewater enterprise

sewer enterprisesewer enterprise► Consider Commercial / Consider Commercial /

Private DevelopmentsPrivate Developments

Pavement Management PlanPavement Management Plan► Local input for repairs, costs, other needsLocal input for repairs, costs, other needs► Goal is to bring all roads up to satisfactory/good Goal is to bring all roads up to satisfactory/good

conditioncondition► Run scenarios: # yrs / annual budget / avg PCIRun scenarios: # yrs / annual budget / avg PCI► Adjust and update annually for CIP Adjust and update annually for CIP

Level of Investment MattersLevel of Investment Matters

► Goal is to achieve City-wide PCI>=75Goal is to achieve City-wide PCI>=75

PMP UpdatesPMP Updates

►Annual updates to database by staffAnnual updates to database by staff►Annual monitoring by staff for road Annual monitoring by staff for road

deterioration (compare to video library)deterioration (compare to video library)►Re-run repair & funding scenarios annuallyRe-run repair & funding scenarios annually►Coordinate repaving with other CIP projectsCoordinate repaving with other CIP projects►Update road condition imaging periodically Update road condition imaging periodically

(every 4-6years)(every 4-6years)