Design and Construction of a Reclaimed Water Distribution System in a Highly Dynamic Corridor in Cary, North Carolina

Transcription

1 Design and Construction of a Reclaimed Water Distribution System in a Highly Dynamic Corridor in Cary, North Carolina 2016 NC AWWA-WEA Spring Conference Chris Oliver, EI, AECOM Lynn Brilz, PE, Town of Cary Adam Paukovich, PE, AECOM April 18, 2016

2 Overview Town of Cary Geography Reclaimed Water Distribution System Project Background Challenges Faced Design Phase Construction Phase Solutions for Smooth Transition from Design to Construction From the Owner s Perspective Conclusions / Lessons Learned Questions

3 Town of Cary One of the fastest growing municipalities in the United States Population: 155,000+ Largest town in NC Third largest municipality in the Triangle

4 Reclaimed Water in the Town of Cary In 2001, Cary became the first municipality in NC to provide reclaimed water to developments and businesses ~1.9 million gallons on a peak day (2015) Up to 1.2 MGD in summer months (2015)

5 Jordan Lake Water Reclamation and Reuse Project Phase I 2006 Partnership between Town of Cary, Durham & Wake Counties To provide reclaimed water to Research Triangle Park (RTP) and Western Cary Reclaimed water from Durham County s Triangle WWTP 2012 Phase I was completed Wake County portion of RTP Part of Cary s Western Reclaimed Water Service Area

6 Jordan Lake Water Reclamation and Reuse Project Phase II Extend further south in Cary s western service area Mills Park Schools USA Baseball National Training Complex Thomas Brooks Park Various subdivisions Project notes: 12,000 LF of 4-inch to 16- inch PVC & DIP pipeline 2,000 LF of 16-inch repurposed DIP force main Multiple jack and bores Highly dynamic corridor

7 Phase II Project Area BEGIN NEW 16 RECLAIMED WATERLINE BEGIN 16 RE-PURPOSED FORCE MAIN TO RECLAIMED WATERLINE NEW 8 RECLAIMED WATERLINE TO SCHOOL END 16 RE- PURPOSED FORCE MAIN NEW 8 RECLAIMED WATERLINE TO USA BB

8 Green Level Church Rd Carpenter Fire Station Rd.

9 Green Level Church Rd Carpenter Fire Station Rd.

10 Green Level Church Rd Carpenter Fire Station Rd.

11 Green Level Church Rd Carpenter Fire Station Rd.

12 Green Level Church Rd Carpenter Fire Station Rd.

13 Green Level Church Rd. Mills Park Dr.

14 Challenges Faced Design Phase Survey and SUE retrieval Changes to roadway alignments and above grade features Utility relocations, upgrades, and additions Future installation of street/signal lights ROW and property owner coordination

15 Challenges Faced Construction Phase Utility relocations, upgrades, and additions Developer/utility record drawings for below grade features Restoration costs Bore pits Ongoing subdivision development & roadway alignment changes Laydown/storage areas Newly-started construction before completion/final walk-through

16 Green Level Church Rd. Morrisville Pkwy

17 Examples of Challenges Faced

18 Examples of Challenges Faced

19 Solutions for Smooth Transition from Design to Construction Coordination with various utility owners Coordination with developer s engineers Pre-submittal meetings with NCDOT Additional SUE Documentation Draw a line in the sand

20 FROM THE OWNER S PERSPECTIVE Keep decision-makers informed and up-to-date on the project and don t blind-side them with change orders. Use Work Change Directives when appropriate to keep the project moving. Stay actively involved and current on construction issues, so that you are prepared to respond and make decisions or recommendations in a timely manner. Check in with your agency s site plan reviewers to see what is coming and make adjustments accordingly (e.g. Install tee and valve assemblies at future connections to avoid future disruption, check grading plans for adequate cover depth, etc.) Touch base with coworkers/colleagues regarding other capital projects and make adjustments to avoid future conflicts (e.g. Extended casing pipe to avoid future conflict with installation of traffic signal foundations). Keep abreast of upcoming private utility work that might impact the work area (e.g. street light installation). Consider including a few contingency items in the bid schedule, such as extra fittings and valves for unanticipated connections.

21 Conclusion/Lessons Learned Document, document, document! Coordination between all stakeholders Consider higher level SUE investigation Pay items for utility investigation during construction Contingency items for unanticipated connections Shorter time between design and construction (if possible) All parties must be flexible

22 Questions? Chris Oliver, EI Lynn Brilz, PE Adam Paukovich, PE April 18, 2016