Aurora Highlands Civic Association Meeting. Arlington County Department of Environmental Services May 9, 2018

Transcription

1 Aurora Highlands Civic Association Meeting Arlington County Department of Environmental Services May 9,

2 Agenda Overview Neighborhood Projects Arlington Ridge Rd Project Future Project 2

3 Drinking Water Overview Source Water: Potomac River Treatment plant: Washington aqueduct Distribution System: 525 miles of water main 4 to 48 inch Ductile or Cast Iron, Steel, Concrete, Plastic 16,000 water valves 37,200 water services 3,700 fire hydrants 5 water pump stations 8 water storage tanks 32 Million Gallons (MG) 3

4 Miles Water Main Age Length of Water Mains By Decade Over 50% of the water system is comprised of unlined cast iron pipes 8 & 6-inches in diameter built before 1960 Diameter 8 Diameter Decade

5 Water Main Rehabilitation & Replacement Cleaning and Lining Water Main Replacement 5

6 Neighborhood Projects Expected construction start date Mid-May TH Pl S 26 th St S to S Hayes St S Hayes St 26 th St S to Fort Scott Dr. 17 TH St S S Lynn St to S Ives St 60% design Fall 2018/Winter th St S S Kent St to S Hayes St 22 nd St S S Ives St to S Fern St

7 What to Expect Neighborhood Projects: Working hours 8AM to 4PM Monday through Friday Parking Impacts Occur in phases throughout project Notice will be given at least 72 hours in advance Traffic Temporary traffic detour and/or street closure during the day Driveway access will be impacted but accessible at all times Water service disruption Notices will be distributed 48 hours in advance All shutdowns will be limited to the same daily construction hours. Construction impacts Dust, mud, noise & debris Notification Detailed letter will be sent to Civic Associations presidents and residents who will be directly impacted by the project. 7

8 S Arlington Ridge Water Main Project Project limits S Oakcrest St to S Nash St. Existing condition 8inch main Built in 1927 Maintenance issues Proposed Install ~5300 feet of new 12inch and 8inch main Improve fire flow Timeline Summer 2018 Fall

9 What to Expect S Arlington Ridge Project: Working hours 9AM 4PM Monday through Friday Possible weekend work Traffic impact Flagging operation Variable message signs 2 weeks before construction start Sidewalk will be open at all times Water service disruption Notices will be distributed 48 hours in advance All shutdowns will be limited to the same daily construction hours. Construction impact Dust, mud, noise & debris Notification Detailed letter will be sent to Civic Associations presidents and residents who will be directly impacted by the project. 9

10 Water Quality What to Expect Tuberculation (iron oxide, discolored water, rust) Corrosion byproducts in pipes iron oxide deposits Light yellow to dark brown temporary discoloration Cloudy/Whitish water Drinking water naturally contains a certain amount of dissolved air. Air dissolved in water can result in tiny bubbles similar to those in carbonated beverages. Run your cold water tap for 5 to 10 minutes, the water should clear. If it doesn t, call the 24-hour line at and a crew will be sent to flush the line. 10

11 Future Project 23 rd Street South Project Limits S Lynn St to S Eads St Scope of work Replace existing ~ 4200 feet of 8 inch 1927 main with a new 12 inch Status/timeline 60% design Expected construction start Fall 2019/Winter

12 Questions? 24 Hour Emergency Number:

13 Drinking Water Quality Report 13

14 Drinking Water Quality Monitor drinking water at the entry point into the distribution system Monitoring/Testing the distribution system Bacteriological: Total Coliforms Rule (TCR) Disinfection By Products Water Quality Parameters Nitrification Meets/exceeds all regulations 14

15 Drinking Water Quality Lead and Copper Rule (LCR) Due to consistent compliance and results below the Action Level, EPA requires Arlington to sample only once every three years. Next scheduled sampling will start June 2016 Per LCR sampling is required for specific homes built between Orthophosphate Corrosion control added at the treatment Plant Acts as a corrosion inhibitor by forming a protective film on the interior of the pipes. This film protects the pipe from the corrosive effects of water Arlington does not have lead pipes for water distribution 15