GEORGINA ISLAND Roads Upgrade and Drainage Project Presentation to - PowerPoint PPT Presentation

GEORGINA ISLAND Roads Upgrade and Drainage Project Presentation to The Community March 4, 2014

Introduction C.C. Tatham & Associates Ltd. (CCTA) retained by Georgina Island First  Nation (GIFN) to provide professional engineering services for upgrading of approximately 10 km of roads; Chief Joseph Snake Road, Loon Road, Bear Road and Root Road;  Project includes:  Assessment of existing roadway conditions;   Recommendations for cost effective reconstruction options;  Life cycle analysis;  Cost estimates;  Drainage improvements;  Sidewalk recommendations; LVM Inc. providing geotechnical advice.  Introduction 2

Drainage Review Chief Joseph Snake Road, Bear Road and Root Road Existing ditching is poorly defined, shallow and overgrown;  Drainage outlets are blocked or missing, restricting flow;  Regrading and culvert replacement to provide uniform unobstructed  ditches will improve surface drainage; Drainage concerns between Chief Joseph Snake Road, Turtle Road  and the lake related to low topography and maintenance needs; Outlet improvement at campground on Bear Road.  Drainage Overview 3

Road Overview 4

Loon Road Ditching exists only on southwest side, poorly defined and overgrown;  Install a French drain on northeast side to collect road surface runoff,  discharging to southwest ditch; Regrade southwest ditch to a uniform positive grade.  Road Overview 5

LVM Investigation Thorough evaluation of current roadway conditions:  Roadway distresses;  Granular base/subbase/surface treatment depths;  Road structure materials.  Distresses related to:  Relatively flat road profiles;  Proximity to wetlands;  Undefined outlets and high lake levels relative to road ditches  and road bases; Existing road structure is shallow, substandard granular material;  Concluded existing pavements are well beyond their functional service  lives and major rehabilitation is required. Geotechnical Evaluation 6

Rehabilitation Method - Foamed Asphalt Stabilization  Place 100 mm granular material over existing pavement (utilizing material quarried on site if available);  Pulverize granular material and existing road structure to depth of 225 mm;  Stabilize pavement surface with expanded (foamed) asphalt to depth of 150 mm;  Double layer surface treatment;  Regrade all ditches and replace driveway and road cross culverts. Rehabilitation Options 7

Other Rehabilitation Options and Lifecycle Analysis  Full depth excavation;  Pulverize asphalt;  Mechanical reinforcement.  Considers initial capital cost plus 20 years of maintenance;  Full depth reconstruction has highest capital cost and 2 nd highest maintenance cost with crack sealing and repaving in year 15;  Pulverizing has lowest capital cost and highest maintenance cost with annual spray patching and surface treatment in years 8 and 16;  Foamed asphalt stabilization has 2 nd lowest capital cost and lowest maintenance cost with surface treatment in years 10 and 20;  Foamed asphalt stabilization is the most cost effective. Rehabilitation Options 8

Construction Cost Estimates  Foamed Asphalt Stabilization $ 5,560,000;  Includes 10% contingency;  Includes all drainage improvements within roadway;  Assumes imported granular material, may be reduced by use of on-site quarries;  Does not include sidewalk costs;  Does not include outlet cleaning/improvements. Cost Estimates 9

Sidewalk  1.5 m widening of south bound lane of road;  Low traffic volumes and speeds minimize safety concerns;  Delineation of the walkway by line painting;  Winter maintenance completed by existing snow removal equipment;  Does not alter the established drainage patterns;  Does not require work beyond the right-of-way;  Estimated construction cost approximately $392,000. Sidewalk 10

Sidewalk 11

Summary  Foamed asphalt stabilization with double surface treatment;  Most cost effective rehabilitative method to provide adequate structural capacity and meet functional service life expectations;  Rehabilitates existing road structure and minimizes placement of new granulars, thereby reducing costs;  Double surface treatment for hard surfacing is a cost effective alternative to hot mix asphalt and provides more flexibility during movement of the subgrade due to frost actions and spring thaw;  Existing granular quarry material may be suitable for this rehabilitation method and result in further cost savings. Summary 12

Next Steps  GIFN confirm preferred solution and construction schedule (2014/2015);  Liaison with agencies (MNR, DFO, LSRCA);  Survey drainage outlets;  Assess quality and quantity of island quarry material;  Prepare final design and tender documents;  Circulate to invited contractors for tendering;  Contract award and construction. Next Steps 13

Before You Leave:  Have all of your questions been addressed? For Further Information: Tim Collingwood, B.A.Sc., P.Eng., Ted Kruska, C.E.T., Director, Manager – Orillia Branch Project Manager C.C. Tatham & Associates Ltd. C.C. Tatham & Associates Ltd. t: (705)325-1753 x 224 f: (705)325-7420 t: (705)325-1753 x 225 f: 705)325-7420 e: tcollingwood@cctatham.com e: tkruska@cctatham.com Contact Information 14