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1 Water System Improvements Upcoming Construction for Drinking Water Capital Projects by Jodye Russell.

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Presentation on theme: "1 Water System Improvements Upcoming Construction for Drinking Water Capital Projects by Jodye Russell."— Presentation transcript:

1 1 Water System Improvements Upcoming Construction for Drinking Water Capital Projects by Jodye Russell

2 2  Small-diameter water main replacements and rehabilitation  Large-diameter water mains Rehabilitation and replacement Large valve replacements Condition assessments with repairs  Drinking water storage Upgrades and repairs to underground reservoirs and elevated tanks New elevated water storage tanks  Drinking water pumping station improvements  Miscellaneous drinking water projects Drinking Water Project Categories

3 3 Small-Diameter Water Mains (SDWMR)  New ductile iron water main in roadway replaces old pipe Advertise 2 to 4 jobs per year on the open market Each job has 2 to 5 miles of piping ($4.0M–$10.0M) Pipe installation, majority is 8-inch and 12-inch pipe Extensive water service replacements – typically 1-inch copper and meter boxes Extensive pavement restoration with milling and overlay Daily traffic control crews

4 4 Small-Diameter Water Mains (SDWMR)  Some small-diameter lining projects Expecting 1 job per year on the open market, 2 to 4 miles ($1.0M–$4.0M) Cleaning of 8-inch and 12-inch water main and lining (cement mortar or CIPP) Includes valves replacements, but few water service line replacements Paving, traffic control, temporary piping installation, and 24-hour maintenance

5 5 Large-Diameter Water Mains  Rehabilitation and repair projects 2 to 3 jobs per year available to pre-qualified bidders Each job ranges $1.0M–$10.0M Pipe sizes are 16-inch up to 66-inch Materials include steel mains, PCCP mains, and cast iron and ductile iron mains Sliplining (HDPE or fPVC), internal leak seals, and cathodic protection systems Linestops and continuous bypass pumping are often required Pavement restoration with milling and overlay Weekly/monthly traffic control setups Pressure testing, disinfection, and chlorination of water mains required

6 6 Large-Diameter Water Mains  Large-diameter valve replacement projects 1 job per year to pre-qualified bidder, $2.0M–$6.0M Extensive shut-down coordination and night-work required Construction site lighting, paving, and traffic control

7 7 Large-Diameter Water Mains  Condition assessment and leak detection projects 2 to 3 jobs per year available ranging $0.5M–$2.0M Assessment tools such as: –Magnetic flux leak detection –In-line acoustical tools –External acoustical tools –Eddy current inspections Repair methodologies such as: –Carbon Fiber Reinforced Polymers (CFRP) – internal –Cathodic protection systems installed retroactively –Linings with epoxy or polyurethane Could also include large valves, linestops, or cut-and-caps

8 8 Reservoir Improvements  Underground concrete reservoirs – repairs and improvements 5 projects in next 4 years: $1.0M–$5.0M each in construction Piping, valves, and vaults; minor concrete repairs, joint repairs, and spall repairs Water quality equipment – mixers, sampling pumps, and analyzer panels Impervious membrane covers with earth work and related site work

9 9 Reservoir Improvements  Elevated steel water tanks – repairs and improvements Piping, valves, and vaults Minor access structure repairs and painting Water quality equipment—mixers, sampling pumps, and analyzer panels Painting repairs and wholesale tank recoating  New elevated water tanks 2-MG composite-style with extensive site work and new large-diameter mains St. Elizabeths tank is scheduled for bid in 2014 Two more planned within 10 years

10 10 Pumping Station Improvements  Improvement projects organized by discipline Inside piping and valve improvements at Bryant Street PS Slate roof repairs (historic facility) and window improvements at Bryant Street PS Reconstruction of roof and parapet walls at the warehouse building at Bryant Street PS HVAC improvements and electrical repairs at Bryant Street PS Masonry repairs at Fort Reno site Piping and new generator at 16 th and Alaska PS (already bid)

11 11 Miscellaneous Projects  Residential Pressure Reducing Valve (PRV) installations 4 th high Pressure Zone Improvement Project (PZIP) –Already bid: $1.2M Anacostia 2 nd high PZIP –Late 2015 or early 2016 –Estimated at $3.0M  On-call water main construction contractor (IR&R) Normally 1 contractor working directly for DWS (water operations) Next scheduled advertisement is 2016  On-call pavement restoration construction contractor Normally 1 contractor working directly for DWS (water operations) Next scheduled advertisement is 2015

12 12 Upcoming Water Project Totals ($M) Category (# of Projects) Total SDWMR (24)$20.0$22.0$24.0$26.0$28.0$30.0$150.0 LVR (6)$4.0$3.4$3.5 $3.6$3.7$21.7 Large-Diameter Rehab (10)$7.0$5.0$2.0$8.0$10.0$12.0$44.0 Ex. Storage Rehab (7)$9.0$8.0$3.5——$5.5$26.0 Other (5)$6.5$19.5$7.3———$33.3 Total$46.5$57.9$40.2$37.5$41.6$51.2$275.0

13 13 Long-Term Opportunities ($M) Category (# of Projects) Total SDWMR (24)$32.0$34.0$36.0$38.0$40.0$42.0$222.0 LVR (6)$3.5 $21.0 Large-Diameter Rehab (10)$7.0$5.0$2.0$8.0$10.0$12.0$44.0 Other (7)$12.0—$14.0———$26.0 Total$54.5$42.5$55.5$49.5$53.5$57.5$313.0

14 14 Sewer System Improvements Upcoming Construction for Sewer System Capital Projects

15 15 Sewer System Project Categories  Pump station rehabilitation Storm Sanitary/combined  Sewer inspection projects  Sewer rehabilitation projects  Creek bed sewer rehabilitation  Miscellaneous projects

16 16 Pump Station Rehabilitation  Stormwater pump stations 12 of 16 scheduled for upgrades Improve reliability and hydraulic capacity Upgrade components to current standards and codes Construction projects expected to begin in 2016 approximately Approximate budget $25.0M (design and construction)

17 17 Pump Station Rehabilitation Upcoming sanitary/combined pump station projects: Project Approx. Construction Start Approx. Contract Value Potomac Pumping Station— Phase III RehabilitationAugust 2014$13.5M Main St. and O St. PS Intermediate UpgradesMay 2015$11.7M 3 rd St. and Constitution Ave NW Pumping Station RehabAugust 2015$2.2M

18 18 Inspection  Inspect about 100 miles/year by CCTV  Some specialty laser profiling  DC Water uses the National Association of Sewer Services Companies (NASSCO) Pipe Assessment and Certification Program (PACP) system Contract Type SLRP – Sewer Inspection Program$3.5M$2.0M Major Assets – Inspection*$17.0M$1.5M$0.3M$1.5M—

19 19 Rehabilitation  The most frequently considered rehabilitation types and methods by DC Water are as follows: Non-structural sealing and semi-structural rehabilitation for stopping leakage, preventing bedding migration, and repairing minor deterioration including packer injection grouting and masonry patches Structural repair and reinforcement including cured-in-place pipe (CIPP), structural shotcrete, and sliplining Pipe replacement including open-cut replacement and pipe bursting Project Type SLRP – Sewer Rehab and Repair$24.0M$40.0M $58.0M$42.0M Major Assets – Sewer Rehab$33.0M$35.0M$18.0M$26.0M$58.0M

20 20 Creek Bed Sewer Rehabilitation  This project consists of multiple jobs to protect infrastructure in the vicinity of streams and creeks located throughout the District  The scope is to relocate and rehabilitate manholes and sewer pipes vulnerable to flooding or erosion and infrastructure exposed to or adjacent to surface waters  This project also includes rehabili- tation for outfalls and other tasks required to protect exposed sewers due to stream bank erosion Damage from erosion. Exposed manhole.

21 21 Creek Bed Sewer Rehabilitation  Construction is expected to begin in 2015 or 2016 on projects in Glover Archbold Park ($5.9M), Soapstone Park ($5.0M), or Foundry Branch Park ($5.0M)  Approximately 23 other projects are expected to begin in 2019 and 2020 for a total value of $47.2M Damage from vegetation. Exposed pipe.

22 22 Miscellaneous Projects  Rehabilitation of manholes – 3 projects, $1.5M  New headquarters building – $55.6M  Rehabilitation of gates and structures – 2 projects, $ 4.1M  Inflatable dams: life cycle and implementation – $2.1M  Flow metering and monitoring – $3.5M  On-call sewer rehab construction contractor (IR&R) One contractor working directly for DSS (sewer operations) Next scheduled advertisement is 2017 or 2018 Inflatable dam.

23 23 Upcoming Sewer Project Totals ($M) Category (# of Projects) Total SLRP Inspect/ Rehab (44)$28.0$42.0 $60.0$44.0$38.0$254.0 Creek Bed (15)——$16.0——$34.0$50.0 Pump Station (6)$16.0$15.0$2.0$20.0——$53.0 Major Asset Inspect/Rehab (24)$50.0$37.0$18.0$28.0$58.0—$191.0 Other (14)$8.0$59.0$5.0—$6.0—$78.0 Total$102.0$153.0$83.0$108.0 $72.0$626.0

24 24 Long-Term Opportunities ($M) Category (# of Projects) Total SLRP Inspect/ Rehab (23) $47.0$37.0$41.0$27.0$29.0$30.0$210.0 Creek Bed (11)$13.0—————$13.4 Pump Station (2)$0.85K$0.23K————$0.3K Total$61.0$37.0$41.0$27.0$29.0$30.0$225.0


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