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Omāroro Pipelines Project
Public Meeting
15 August 2019
Agenda
Introductions─ Wellington Water, Brian Perry Civil, WCC, GWRC
Overview of project – Wellington Water
Progress report – Brian Perry Civil
Wallace St bulk main works / diversion options – Brian Perry Civil
Questions
Overview
Omāroro Reservoir being built to address growth and improve resilience
Pipelines project is building the water network for the Omāroro Reservoir
Further renewal work being delivered at the same time –intent is no more major water network works in the area for many years
Scope of pipelines work
A new bulk water main
(Hargreaves, Wallace, Howard)
Renewal of local water mains
(Hargreaves, Wallace, Finlay)
Upgrade of storm water pipe
(Rolleston, Wallace)
Renewal of existing sewer
(Wallace, Finlay)
Progress report
Local water renewals on Hargreaves St completed
Bulk water on Hargreaves St underway
Local water renewals on Wallace St underway
Valve chamber at Hargreaves/Wright St corner underway
We’ll keep you informed about impact and progress of work
Construction Plan – estimated dates
bulk water main
local water mains
storm water
sewer
Wallace St traffic volumes
Wright St peak flow is ~200/hr (~1000/day)
June/July 2017, June 2018 traffic counts
Weekday/weekend peak is ~1600/hr (~20,000/day)
10pm – 5am peak is ~400/hr (~1000/nght)
Wallace St traffic reduction
VMS boards encourage use of alternative routes
Advertising campaign on radio, social media and other online channels
Advising delivery co’s, taxis, ubers to use alternate routes
We anticipate significant reduction in flow along Wallace St
WCC will continue to monitor
TM options for Wallace St bulk main work
Options considered included:
Option 1: Stop Go on Wallace Street
Option 2: Partial Diversion, NB Wright St, SB Wallace St
Close Wallace St/ Wright St
Option 3: Full diversion to Adelaide Rd
Option 4: Full diversion to Tasman St
Option 5: Close Wallace St, NB Wright St, SB Tasman St
Option 6: Close Wallace St, full diversion to Wright St This is by far the safest and least disruptive option
Option 1: Stop / Go on Wallace St
Advantages─ No diversion required
─ No changes to bus operations
Ruled out because─ Stop / Go on Wallace St creates gridlock throughout the network due
to tailbacks
─ The modelling confirms intolerable delays even outside of peak hours
─ This option is not feasible
Wallace St bulk water challenge
Option 2: NB Wright St, SB Wallace St
Partial diversion, northbound traffic only onto Wright St
Advantages─ Only northbound traffic on Wright St
Ruled out because─ Wallace St road width is insufficient to safely construct bulk water
pipes from Hargreaves St to Howard St
─ Due to deep trenches, large diameter pipes leaves insufficient room to allow traffic flow past the work site
─ This option is not feasible
Bus routing options
Divert via Adelaide Rd ─ Too far from current routes, large number of stops displaced
─ High impact on University and Schools
Divert via Tory St / Tasman St─ Diversion leads to convoluted routes
─ Twice carparks affected & overhead services to resolve (cf Wright St)
─ Significant distance from current routes, stops displaced
Divert via Wright St─ Short Diversion follows same route (1 stop relocated from Wallace St)
─ Some overhead wires need lifting for double-deckers
Option 3: Full diversion to Adelaide Rd
Wallace St and Wright St both closed to through traffic
Advantages─ No additional traffic on Wright St
Ruled out because─ Very long diversion
─ Limited capacity on Adelaide Road for the additional traffic
─ Public transport impact too great – route changes and delays
─ Network resilience compromised if Wallace St + Wright St closed
─ This option is not feasible
Option 4: Full diversion to Tory St/Tasman St
Wallace St and Wright St both closed to through traffic
Advantages─ No additional traffic on Wright St
Ruled out because─ Poor connection to road network, particularly north end
─ Very long diversion
─ Tory St / Tasman St ill-suited to anticipated traffic flows
─ More affected residents, more parking displaced
─ Public transport impact significant – long route change
Option 5: NB Wright St, SB Tasman St
Wallace St closed between Hargreaves St and John St
Advantages─ Only northbound traffic on Wright St
Ruled out because─ Same reasons as Option 4
─ Complex diversion due to diverse routes NB/SB
─ Max number of affected residents
Option 6: Full Diversion Wright St
Wallace St closed between Hargreaves St and John St
Disadvantages─ Significantly increased traffic on Wright St
Advantages─ Shortest diversion length – least impact on residents/parking
─ Least impact on bus operations and bus users
─ Minimal infrastructure change required
─ This is by far the safest and least disruptive option
Wright St diversion
Traffic diverted to Wright St at Hargreaves St and John St
Car parking removed on one side of Wright St
Buses will use the route
Travel times reliable
Work can proceed safely
Overall disruption shortened with this diversion
Wright St diversion route
Wallace St work area
Wright St bus route
Testing/Investigations─ Have modelled longest buses using vehicle tracking software
─ Have physically trialled the longest buses by driving the route
─ Wires lifted for double deckers
─ To do: Adjust road camber at corners in Hargreaves St
─ To do: Test drive double deckers
─ Buses will pass each other on Wright St ~16 times a day
Controls─ Bus stop will be near the laneway to Wallace St
─ Signalised crossing for pedestrians as per Wallace St
─ Additional lighting if required
Wright St diversion bus tracking
Hargreaves St / Wright St intersection
John St / Wright St intersection
Impacts of diversion on Wright St residents
The additional traffic will be significantly greater than existing flows - expect reduction on current Wallace St traffic
Pedestrian crossing installed near alley through to Wallace St for safe passage across Wright St
Bus stop moved from outside Wallace St dairy to beside new pedestrian crossing in Wright St
Car parks removed on one side (uneven numbers) to provide space for two way traffic
Rubbish collection will be on a different schedule
What can be done to reduce the impact?
Traffic calming measures such as reduced speed limits, traffic lights and minimum lane widths
VMS boards on feeder routes encouraging people to use Adelaide Road as an alternative
Advertising campaign on radio, social media and other online channels telling people to avoid the area
Asking delivery companies, taxis, ubers to use alternate routes
Coupon parking will be changed to residents’ parking in adjacent streets – surveys indicate unused parks exceed ‘lost’ parks
Impacts of work on Wallace St residents
Access to properties from each end of the work site (no through traffic)
Work site moving along the street, different residents impacted as work progresses
No parking on street adjacent to work sites
Full communication with affected residents and businesses
1-1 engagement to address individual issues for access that arise (as we have been doing in Hargreaves St)
Pedestrians will need to use the formal crossing points, this will add distance to some people’s walks
Time considerations in diversion options
Alternative 1 – 43 week diversion onto Wright St11 week full diversion (bulk main works) Nov 2019 – Feb 2020
+
32 week NB diversion (sewer/local water) Feb 2020 – Sep 2020
or
Alternative 2 – 23 week diversion onto Wright St23 week full diversion (bulk main/sewer/local water) Nov 2019 – May 2020
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