2. Tonight’s presentation
• About the project
• Project schedule and locations
• Looking ahead and what you’ll see
• Benefits and partnerships in your
community
• Future construction
3.
4. 44
Dry Weather Flow
to treatment plant
Additional Conveyance
Capacity Available for
wet-weather
Combined Sewer
Overflow Discharge to
Stream/Lake
13. CONSTRUCTION LOOK AHEAD
0 to 30 Days
• Utility relocation throughout
• Work site prep
• Preconstruction video, photos
• CCTV inspection of existing
sewers
14. CONSTRUCTION LOOK AHEAD
30 to 60 Days
E.109thStreet
E.110thStreet
Glenview Ave.
Elk Ave.
E.108thStreet
E.107thStreet
E.106thStreet
Dupont Ave.
• Road closure:
– E. 109th St., north of St. Clair
– Approximate duration:
1 year
16. CONSTRUCTION LOOK AHEAD
30 to 60 Days
• Exploratory work along St. Clair
• Property surveys (Mainly along E. 109th)
• Utility relocation, site prep
• Start work on mainline sewer structures
along E. 110th/Hazeldell
• Sheet pile and secant pile construction
17. Sheet piling
• Traditional method
• Vibratory hammer creates noise, vibration
• Sheeting extends above ground
• Used where space is limited
18. Secant Pile Construction
Alternative method for
supporting excavations
Holes are drilled with an auger
and then filled with concrete
Requires slightly larger
footprint than sheet piling
Installed flush with the surface
Drilling operation creates
vibration noise
28. Community benefits
• Pollution reduction
– System will prevent 110 million
gallons of combined sewer overflow
every year
29. Community benefits
• Final roadway restoration will
include new pavement
• Enhanced restoration will be
considered
30. Good Neighbor Ambassadors
• Ambassador team will support
neighborhood projects, receive training,
and serve as Sewer District
representatives to residents.
31. Future projects
DST Overlap (DST)
DST-4 Forest Hills Park
DST-5 St. Clair/E 109th
DST-7 Lakeview and Ada
DST-8 Lakeview and Superior
East 140th Relief Sewer
Doan Valley Tunnel (DVT)
Lakeview and Ada
Superior Ave
Shoreline Storage Tunnel
(SST)
Forest Hills Park Mining Site
SST
E140
DWIRS
DST
DVT
11,000 feet of 36”-72” sewers in tunnelApproximately 2,700 feet of 15”-84” sewers in open-cut 2 diversion structures to future DST and Dugway West/East Culverts (DWD-1 & DWD-2)2 regulator structures to Dugway West Culvert (DWR-1 & DWR-2)Flow Divider (DWF-1)Modifications to 39 existing regulators