STORMWATER ASSESSMENT. City of Palm Bay July 6, 2017
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1 STORMWATER ASSESSMENT City of Palm Bay July 6, 2017
2 Speakers: Agenda Camille Gordon Taylor- Operations- Level of Service John Cady- Fleet Services- Vehicle Troy Davidson- Engineering- Capital Improvement Jarvis Middleton- Public Works Director Greg Stone- Stormwater Project Manager
3 City of Palm Bay s Infrastructure Level of Service Capital Improvement Vehicle
4 LEVEL OF SERVICE Camille Gordon-Taylor
5 Stormwater Utility Program Improvements Service Description Current Frequency (annual) Canal Restoration Canal Trenching Street Sweeping Right of Way Restore neglected canals to full functionality to improve water flow and retain higher volumes of water to control flooding Improve canal access for mowing, improving flow, and decreasing damage to equipment; accounts for upkeep of restored canals Proposed Increase (annual) 0 Canals 5 Canals Canal Flat/Slope Mowing 1103 Acres(1075 Locations) 2 times 4 times Retention Pond Canal Dipping/Dredging Culverts/Lotline Pipe Replacement 26 ponds Mowing 2 times 4 times Dipping Every 20 years Every 5 years ~533,925 Linear Feet 5 Year Cycle Maintain with increased Chemical Spray & other mitigation 173 failed pipes As needed 24 replaced in FY16 In order to maintain maximum efficiency of the storm water in the right of way, trenching is performed to remove accumulated sediments and restore positive flow to the drainage system Reduce pollutants which clog and damage stormwater infrastructure including pipes, storm drains, etc. 233 Curb Lane Miles Mowing in Units/ Subdivisions - empty parcels that are unoccupied. Mowed so that the water flows 1154 Acres Complaint Driven Increased proactivity with planning/design/ construction Scheduled Preventative 2 times 8 times 2 times 4 times
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7 Canal Restoration
8 Stormwater Utility Program Improvements Service Description Current Frequency (annual) Canal Restoration Restore neglected canals to full functionality to improve water flow and retain higher volumes of water to control flooding Improve canal access for mowing, improving flow, and decreasing damage to equipment; accounts for upkeep of restored canals Proposed Increase (annual) 0 Canals 5 Canals Canal Flat/Slope Mowing 1103 Acres(1075 Locations) 2 times 4 times Canal Trenching Street Sweeping Right of Way Retention Pond Canal Dipping/Dredging Culverts/Lotline Pipe Replacement 26 ponds Mowing 2 times 4 times Dipping Every 20 years Every 5 years ~533,925 Linear Feet 5 Year Cycle Maintain with increased Chemical Spray & other mitigation 173 failed pipes As needed 24 replaced in FY16 In order to maintain maximum efficiency of the storm water in the right of way, trenching is performed to remove accumulated sediments and restore positive flow to the drainage system Reduce pollutants which clog and damage stormwater infrastructure including pipes, storm drains, etc. 233 Curb Lane Miles Mowing in Units/ Subdivisions - empty parcels that are unoccupied. Mowed so that the water flows 1154 Acres Complaint Driven Increased proactivity with planning/design/ construction Scheduled Preventative 2 times 8 times 2 times 4 times
9 Lotline Ditch Canal Failed Outfall Pipe
10 Stormwater Utility Program Improvements Service Description Current Frequency (annual) Canal Restoration Restore neglected canals to full functionality to improve water flow and retain higher volumes of water to control flooding Improve canal access for mowing, improving flow, and decreasing damage to equipment; accounts for upkeep of restored canals Proposed Increase (annual) 0 Canals 5 Canals Canal Flat/Slope Mowing 1103 Acres(1075 Locations) 2 times 4 times Canal Trenching Street Sweeping Right of Way Retention Pond Canal Dipping/Dredging Culverts/Lotline Pipe Replacement 26 ponds Mowing 2 times 4 times Dipping Every 20 years Every 5 years ~533,925 Linear Feet 5 Year Cycle Maintain with increased Chemical Spray & other mitigation 173 failed pipes As needed 24 replaced in FY16 In order to maintain maximum efficiency of the storm water in the right of way, trenching is performed to remove accumulated sediments and restore positive flow to the drainage system Reduce pollutants which clog and damage stormwater infrastructure including pipes, storm drains, etc. 233 Curb Lane Miles Mowing in Units/ Subdivisions - empty parcels that are unoccupied. Mowed so that the water flows 1154 Acres Complaint Driven Increased proactivity with planning/design/ construction Scheduled Preventative 2 times 8 times 2 times 4 times
11 Trenching Regrading the swale
12 Stormwater Utility Program Improvements Service Description Current Frequency (annual) Canal Restoration Restore neglected canals to full functionality to improve water flow and retain higher volumes of water to control flooding Improve canal access for mowing, improving flow, and decreasing damage to equipment; accounts for upkeep of restored canals Proposed Increase (annual) 0 Canals 5 Canals Canal Flat/Slope Mowing 1103 Acres(1075 Locations) 2 times 4 times Canal Trenching Street Sweeping Right of Way Retention Pond Canal Dipping/Dredging Culverts/Lotline Pipe Replacement 26 ponds Mowing 2 times 4 times Dipping Every 20 years Every 5 years ~533,925 Linear Feet 5 Year Cycle Maintain with increased Chemical Spray & other mitigation 173 failed pipes As needed 24 replaced in FY16 In order to maintain maximum efficiency of the storm water in the right of way, trenching is performed to remove accumulated sediments and restore positive flow to the drainage system Reduce pollutants which clog and damage stormwater infrastructure including pipes, storm drains, etc. 233 Curb Lane Miles Mowing in Units/ Subdivisions - empty parcels that are unoccupied. Mowed so that the water flows 1154 Acres Complaint Driven Increased proactivity with planning/design/ construction Scheduled Preventative 2 times 8 times 2 times 4 times
13 Street Sweeping Comparison City/County Total Miles Frequency Palm Bay Indialantic Melbourne Cape Canaveral Coco Beach Volusia County Brevard County Street Sweeping keeps our sewers and canals cleaner and prevents clogging. Damage from debris both organic and inorganic can deteriorate Stormwater systems more quickly and lead to more costly repairs. It also makes our city look nice and in turn bring tourist traffic.
14 VEHICLE MAINTENANCE John Cady
15 Age by Major Equipment Class Replacement Criteria: Age, Meter, Repair Cost History
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18 Overview Unit# Year Description Age Avg Yearly Usage (hours) Avg. Shop Hrs FY14-16 Avg Maint Cost FY14-16 Maint cost/hr Cost/hr budgeted Planned Usage (Hrs) Utilization Trencher/Ditcher $10,426 $25.66 $ ,344 30% Trencher/Ditcher $11,848 $22.92 $ ,344 38% Trencher/Ditcher $7,105 $14.00 $ ,344 38% 1, $29,379 4,032 35% Slope Mower $20,442 $35.80 $ ,344 42% Slope Mower $26,147 $44.14 $ ,344 44% Slope Mower $18,166 $46.98 $ ,344 29% Slope Mower 11 1, $17,063 $17.01 $ ,344 75% Slope Mower $30,721 $33.07 $ ,344 69% Slope Mower $27,901 $36.24 $ ,344 57% 4, $140,441 8,064 53% Aged Equipment= Downtime Costs Utilization/ Productivity SWU replacement value= $3.25M Currently due/past due= $2.24M $1.1M FY18, $1.1M FY19, $175K FY20 and beyond
19 Troy Davidson, PE City Engineer
20 What s the problem? Galvanized Corrugated Metal Pipe (GCMP) Advantages: Light weight Easy to install Structurally sufficient to support roadways Comes in various sizes to include elliptical Inexpensive Disadvantage: Corrosion 25 year MAX lifespan
21 What s the problem? General Development Corporation (GDC) Virtually every pipe installed by GDC was GCMP No headwalls or slope stabilization GDC installed these pipes 35 to 50 years ago Melbourne-Tillman Water Control District 163 miles of canals Updated design criteria 136 City of Palm Bay canal crossings 74 are currently GCMP (41 on city website) $25M Replacement cost Nearly 5000 additional pipes made of GCMP City owned canal crossings Side pipes and other drainage piping Represent another $15M in replacement costs
22 Pipe Rating Scale Rating Action Description 0 None No Rust or Failures Present 1 None Surface Rust 2 None Medium Rust No Failures 3 Replace Medium Rust with Indication of Failures 4 Replace Heavy Rust (Flakes) No Failures GCMP 5 Replace Heavy Rust (Flakes) Indication of Failures with No Failures in Road 6 Replace Pipe Rusted Out Road Failing 7 Replace RCP Failure Due to Separation
23 Inspection Planned On-Call Construction Update Records Prioritization Rating (0 7) Cost Consequence of Failure Permit SJRWMD & MTWMD Closeout Design Estimate Contractor Selection City Crews Contractor Determine Funding Existing Account Incorporate into CIP Emergency Project Flowchart 3-6 Month Process 23
24 C-41 $260k Residential C-75 $165k Residential Current Examples of Failures C-37 $440 Residential C-68 $260k Collector C-20 July 14, 2014 Emergency Repair Residential/Minor Collector
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29 You can drive on a bumpy road but you cannot drive over a failed culvert Any one of the roads that traverse a GCMP culvert installed by GDC can fail any time The question is not IF the problem exists but rather how we can fix it.
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