Omroro Pipelines Project Public Meeting 15 August 2019 Agenda - - PowerPoint PPT Presentation

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
• n 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
• f 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
• nline 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 St

11 week full diversion (bulk main works) Nov 2019 – Feb 2020 + 32 week NB diversion (sewer/local water) Feb 2020 – Sep 2020

• r

Alternative 2 – 23 week diversion onto Wright St

23 week full diversion (bulk main/sewer/local water) Nov 2019 – May 2020