cover page - ps...works will be completed by trevor taylor (gayndah) tids component of $400,000.00...

Technical Services Commi ee Agenda

04 September 2012 Gayndah

North Burnett Regional Council Technical Services Committee – 04/09/12

NORTH BURNETT REGIONAL COUNCIL TECHNICAL SERVICES COMMITTEE AGENDA – GAYNDAH – 04 SEPTEMBER 2012

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DOCUMENT ID 273823 Attendees Agenda Item 1 Attendees Welcome Agenda Item 2 Welcome / Housekeeping Apologies Agenda Item 3 Apologies Declaration Agenda Item 4 Declaration of Interest Deputations Agenda Item 5 Deputations Infrastructure Report Agenda Item 6 Infrastructure Report 6.1 Internal Section Reports 003‐025 6.2 Gayndah Mundubbera Road 026‐028 6.3 Humphrey Binjour Road Landslip Reinstatement 029‐047 6.4 Technical Services Presentation 048‐049 Closure of Meeting Agenda Item 7 Closure of Meeting

INFRA 01 – TECHNICAL SERVICES INTERNAL SECTION REPORTS

REPORTING PERIOD FROM 25/07/12 TO 21/08/12

Responsible Officer: Ken Palmer – Director Technical Services Report prepared by: Ken Palmer – Director Technical Services

1 PURPOSE OF REPORT

To inform Council of major activities undertaken by the Technical Services Department in the reporting period.

2 CORPORATE / OPERATIONAL PLAN

Community Infrastructure and Disaster Management “1.3 Infrastructure Delivery”: Strategically plan, provide or facilitate community infrastructure and facilities that will meet community needs.

3 POLICY IMPLICATIONS All relevant NBRC Policies are adhered to where applicable.

4 STATUTORY REQUIREMENTS All relevant Standards and Codes are applied where required.

5 RISK MANAGEMENT

Risk management is an integral part in the planning and delivery of infrastructure services by the Technical Services Department.

6 CONSULTATION Internal consultation occurs formally fortnightly at Technical Services Management meetings and informally through briefing sessions with Councillors and staff. Technical Services staff engage with Government agencies, other agencies and with the wider community on an ‘as needs’ basis.

7 OPTIONS FOR COUNCIL TO CONSIDER For information only.

8 OFFICER’S COMMENTS / CONCLUSION

Submitted for Councillors information.

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9 ATTACHMENTS PART A Council Roads

PART B Department of Transport and Main Roads

PART C Flood Repair Works PART D Bridges

PART E Buildings and Facilities

PART F Towns PART G Water and Sewerage PART H Asset Management PART I Land Protection PART J 2012/13 Capital Works Program PART K Infrastructure Services Standing Committee Resolutions 10 RECOMMENDATION

That the report be received.

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PART A COUNCIL ROADS Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Lyle Murray and Peter Van-Breemen Maintenance Program Activity Location Maintenance Grading Glencoe Road, Rawbelle Road

(ongoing), Monogorilby Road, Belah Road

Bitumen Repairs/Reseals

Yarrol Road, Eidsvold town streets, Mundubbera town streets.

Mowing All town areas Drainage Reconstruction Swindon Road Footpath Raising and Levelling

Bow Street (Degilbo)

Gravel Resheet Monogorilby Road, Camboon Road

Forward Program

TIDS Coringa Road pavement widening and overlay. Maintenance grading – Glencoe Road, Monto Patching bitumen – Council roads Monogorilby Road R2R gravel resheet Camboon Road R2R gravel resheeting Swindon road drainage reconstruction and grading.

Construction

Refer to attached Gantt Chart under ‘Part J’

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PART B DEPARTMENT OF TRANSPORT AND MAIN ROADS (DTMR) Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Lyle Murray and Peter Van-Breemen Construction Works in Progress Road Performance Contracts (RPC):

Cania Road widening (this job has been suspended due to the pavement supplier not being able to produce a conforming product).

TNRP: Eidsvold-Theodore Road pavement strengthening works Mount Perry-Gayndah Road: Mingo Crossing, Pavement trimmed,

bitumen primer seal completed, signs and guide posts installed. TNRP: Mundubbera-Durong Road pavement strengthening works.

Road Maintenance Performance Contracts (RMPC):

Bitumen patching and guide posts: Various roads Grading: Monto-Mt Perry Road (ongoing) Biggenden/Gooroolba: Shoulder grading, drainage and pavement

repairs. Other DTMR Works

Widening: Construct passing lanes Intersections Eidsvold/Theodore Calrossie road and Eidsvold/Theodore Redbank road turnoffs.

Forward Program

Bitumen patching various roads. Eidsvold-Theodore Road pavement strengthening works. Mundubbera/Durong Road pavement strengthening works. Cania Road, resume pavement overlay.

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PART C FLOOD REPAIR WORKS Reporting Period: 25/07/2012 to 21/08/2012 QRA Claims and Submissions Prepared by: Cameron Brauer Projects

1. Gayndah Mundubbera Road This project will progress as per the approved project value of $629,530. Flood works will be completed by Trevor Taylor (Gayndah) TIDS component of $400,000.00 will be completed by Council Crew. Contractors that submitted Tenders will be notified they were unsuccessful by letter in the coming week.

2. Humphery Binjour landslip

Awaiting a decision from Council as to the option to proceed with. Negotiations with QRA will commence once a formal decision has been made. “The approved value of repairs in Gayndah NBRC 11.11 submission of this project is $850,000. The Initial design to repair like for like with a two lane sealed road was $4million. This was sent back to ARUP for other options. The Second design was to reduce the road to a single sealed lane at a cost of $2million. As a result, the advice from QRA is to remove this project from the 1st Reconstruction submission and resubmit with appropriate documentation supplied by the ARUP.”

3. Cattle Creek Floodway on Old Rawbelle Road A variation was submitted to QRA for $101,505.00. We are awaiting notification as to how to progress and rebuild the floodway on the road reserve. Council’s contribution of $100,000.00 has also been allocated in this year’s budget.

4. Beeron Road Culvert Approval was given by QRA for the scope change on Beeron Road. Revised project value is $99,526.20.

5. Parks Debris removal has been completed at the Mundubbera Ski Area in preparation for the refurbishment of shelter sheds etc.

Progress Claims

1. The Fifth claim for the 1st Reconstruction submission has been acquitted with a value of $578,484.35 being paid to Council.

2. A Sixth claim is being worked on at the moment which will include outstanding works from Submission 1 as well as all works to date from Submission 2 NBRC16.11.

QRA Audits

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Inspections have been carried out on Wednesday 22nd in Mount Perry and Thursday 23rd in Biggenden.

Harpurs Hill Rd Scrub Rd North Branch Rd Plum Creek Rd Golden Fleece Rd Deep Creek Rd

Repair Works Prepared by: Lyle Murray and Peter Van Breemen Status Type of work Location Road Work completed

Gravel Mt Perry School Lane, Greenbank, Twin Creeks.

Bitumen Repairs Biggenden Emu Creek, Mary Street, McKenzie St, Degilbo Mines, Highstone, Gospel Hall, River Road, North Dallarnil.

Bitumen Repairs Gayndah Church, Redvale, Reids, Mt Steadman, Fowlers

Gravel Gayndah Church Concrete Mundubbera Beeron, Jaru Gravel Monto Doyles, Brians Work in progress

Bitumen Repairs Biggenden Muan, Giles, Wixon.

Bitumen Repairs Gayndah Dalgangal Gravel Gayndah Church, Stockhaven Concrete/Drainage Gayndah Wigton Concrete Mundubbera Sehls Gravel Monto Netz, North Branch Bitumen Repairs Monto Golf Links, Airport Future works in the next reporting period

Bitumen Repairs Gayndah Gayndah-Mundubbera.

Concrete Mundubbera Cattle Creek, Cheltenham Bitumen Repairs Mundubbera Mundowran Gravel Mundubbera Sehls Gravel Monto Hays, Dooloo Tops, Childs,

Bullawarra, Rawbelle. Gravel Eidsvold Mt Eagle

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PART D BRIDGES Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Tyronne Meredith Maintenance Detailed planning work has been undertaken to determine the required resources

and timeframes to complete the bridge and drainage projects budgeted for 2012/13 Construction Works in Progress Capital

Moorooka Culverts Construction has commenced on the installation of the base slab for the Moorooka Culverts. The installation of the culverts and the reconstruction of the approach road will occur after the base slab is poured.

Flood Damage

Wigton Road Culverts Works have commenced to remove the existing concrete arch culvert on Wigton Road damaged in the 2010/11 flood events. A side track has been constructed to divert traffic until the new pipe culverts are installed.

Inspections A number of Level Two bridge inspections have been undertaken in

the Monto area. These inspections will enable future works to be prioritised.

Forward Program

Inspections will continue in the Monto area Works will continue on both the Wigton Road and Moorooka Culverts

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PART E BUILDINGS AND FACILITIES Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Rachael Bonanno Maintenance

As of 17 August 2012, there are 122 open tasks to be actioned. During the month of August 2012 approximately 49 task requests were completed.

Construction Works in Progress Pest Control:

Tenders for the pest control closed on 17 August 2012. Tenders will be awarded and pest control is expected to be undertaken in

September/October. Air Conditioner Servicing:

Tender was issued on 2 August 2012 and will close on 24 August 2012. Mundubbera Ski Area Shelters:

Tenders for the construction of the replacement shelters closed on 17 August 2012.

The construction works will commence as soon as practical. Gayndah Pool Compliance Upgrade:

Works have commenced on these compliance upgrades. These works are expected to continue until the end of the calendar year.

Eidsvold Hall Asbestos Removal:

Tenders will be sought on an invitation to quote basis. The supper room and kitchen will not be closed until contractor has been

sought and works are due to commence. Exterior Painting - Biggenden Administration Office:

Tenders will be sought on an invitation to quote basis. Mundubbera Cemetery Beam Installation:

Location for double beams has been determined. Contractor will soon be sought and will pour beams gradually.

Forward Program

Works will continue on all capital projects.

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PART F TOWNS Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Col Vicary Maintenance Construction Works in Progress

All towns continue to do winter maintenance. Spraying and cleaning gutters and walkways and general tidy up of parks and

ovals etc. Mundubbera recently held a very successful netball carnival with four towns

competing. Facilities were prepared for the event including the cleaning and marking of the old grass court for the under 10’s.

Monto Focus Group is underway with the ordering of new seats for the main street. When they arrive they will be installed. The water pipes for the gardens near the railway overpass are nearing completion so they can start the gardens.

Forward Program

Biggenden Skate Park will be officially opened on 9 September 2012. The area will be neat and tidy, that includes the whole town.

Mt Perry’s new planter pots for the main street are ready for placement; they will have flowers and shrubs in them to beautify the town.

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PART G WATER AND SEWERAGE Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Trevor Harvey Strategy Fluoridation:

A final progress report is currently being written by the principal contractor which, once received, will allow Council to submit the final funding claim for the project.

The first annual Qld Health Fluoride audit has been completed at the Gayndah Plant. There were only a few minor items that were noted for improvement. Overall staff showed good understanding of the operational requirements and the plant was compliant with necessary standards.

The audit for Mundubbera Plant and Monto Plant are scheduled for week ending 24th August 2012.

Drinking Water Quality Management: The Drinking Water Quality Management Plan has been submitted to the Office if

the Water Supply Regulator for assessment.

Sewerage Overflow Manual: The first draft of the Sewerage Overflow Manual has been completed (in-house) and

is currently being reviewed by the Assistant Director.

Operational Statistics:

Raw Water Consumption in ML

0

5

10

15

20

25

30

June

July

August

September

October

November

Decem

ber

January

February

March

April

May

June

Biggenden

Eidsvold

Gayndah

Monto

Mt Perry

Mulgildie

Mundubbera

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Water Consumption Litres/Connection/Day

Sewerage flow statistics will be provided once current flow meter maintenance issues are resolved. Maintenance

Two significant water mains breaks were repaired in Mundubbera Replacement of a cross and two isolation valves are planned for Lyons Street

Mundubbera during the coming month.

Capital Works Order has been placed for the repair of No2 Clarifier at the Monto Sewerage

Treatment Plant Order has been placed for replacement pumps in the Monto No2 Sewage pump

station Order has been placed for detailed design and tendering of the replacement sludge

drying beds at the Monto Sewerage Treatment Plant. Orders have been placed for the detailed scoping and tendering of the Biggenden

Sewerage Treatment Plant repairs and modifications

Flood Damage Repair - Gayndah Approval has been received to progress with the repair of the raw water pumps,

pipes and switching equipment. Two orders have been placed for the works to commence. Early indication of project duration from the successful tender for the civil contract is for twelve weeks subject to equipment availability. A detailed repair timeline from both successful tenderers will be reported when received.

Approval has been received for the detailed drawing submitted to DTMR for the relocation of the No5 Sewage Pump Station.

0

200

400

600

800

1000

1200

1400

Biggenden

Eidsvold

Gayndah

Monto

Mt Perry

Mulgildie

Mundubbera

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Flood Damage Repair - Mundubbera Pricing for the replacement of the Mundubbera raw water pump jetty has still not

been received.

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PART H ASSET MANAGEMENT Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Chris Littlejohns Geographical Information System (GIS)

After reviewing the progress of the Collection of Road culvert and floodway data it has been assesses that collection will continue until approx. April 2013. This will delay the collection of data in other areas.

Verification of water and sewer infrastructure with the new differential GPS has been suspended due to staff being allocated to other tasks.

Training of staff in the use of Intramaps has begun at the various offices. Asset Management Plans

A time line to estimate when the various stages of the different Asset Management Plans (AMP’s) are expected to be undertaken has been completed.

Parks and Open Spaces AMP is being worked on and is planned to be submitted to a future Standing Committee Meeting.

Verification of asset data in each of the parks with the GIS data that has been collected has been hampered by the format that the data is downloaded from the GIS system. Future work on the GIS system will allow the data to downloaded in a more usable format.

Preparation of Annual Asset Management Return for the Department of Local Government has been completed.

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PART I LAND PROTECTION Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Neale Jensen PLANT TYPE FUTURE

ACTIONS

WATER LETTUCE Recently two days were spent by NBRC LPO Officers spraying Water Lettuce on Cania Dam. Very little impact was made in the control of Water Lettuce because of the inaccessibility by boat due to weed and timber. There was only approximately 60% of sprayed coverage making it impractical to continue. Enquiries were then made to the Biosecurity Department of Agriculture Fisheries and Forestry (DAFF) to check the availability of a Biocontrol for Water Lettuce and was advised that a weevil(Neohydronomus Affinis) was available. After Consultation with Sunwater arrangements are going to be made for the purchase and release of the weevil into the dam. A reported huge success with the biocontrol at Cunnamulla was achieved however it did take 3‐4 years for complete eradication.

Awaiting release of weevil

MOTHER OF MILLIONS Mother of millions spraying has almost come to an end this year with the last few big frosts burning of the plants. The Department of Agriculture, Fisheries and Forestry (DAFF) is in the process of seeking approval to release the weevil (Osphilia tenuipes ) for the Biocontrol of M.O.M. Approval for the weevil release is being progressed through the Biological control Act 1987. If supported, D.A.F.F will then seek approval under the Commonwealth Environment Protector and Biodiversity Conservation Act 1999 and the Quarantine Act 1908 for the Weevils release. This process could take 18 months to 2 years to eventuate.

Control finished for this year

AUDIT A recent Audit was conducted by Biosecurity (DAFF) on Council’s Chemical Register and Application Schedule. This was the first audit carried out during the NBRC term. The assessor was generally happy overall with only a few area’s requiring attention. Over the next couple of months the assessor will return to carry out another Audit.

On going

OTHER L.P.O. DUTIES HAVE INCLUDED Spraying of Giant Rats Tail on Shire Roads

Spraying of African Love Grass on Shire Roads.

Spraying of Mother of Millions on Shire Roads

Rubber Vine Treatment

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Calicivirous released on more properties under BMRG project

Visibility clearing on Shire Roads

1080 for Wild Dogs and Feral Pigs

Feral Cat Control at Biggenden Waste Refuse.

FORWARD LIST OF WORKS

African Love Grass

Giant Rats Tail

1080 BMRG for Wild Dog & Feral Pig

Release of Calicivirous for Rabbits

B.M.R.G WoN’S

Rubber Vine

Prickly Acacia

Parkinsonis

Lantana

Hymenachne

On going

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PART J 2012/13 CAPITAL WORKS PROGRAM Reporting Period: 25/07/2012 to 21/08/2012 Prepared by: Technical Services Management Group

A1 sized Gantt Chart attached.

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PART K INFRASTRUCTURE STANDING COMMITTEE RESOLUTIONS Resolution No Date Details Complete 339-06-2012 05/06/12 Road Maintenance

Cr PW Francis moved and Cr PW Lobegeier seconded: That the Director of Technical Services provide a report to Council on alternate and cost effective approaches to the maintenance of North Burnett rural roads as well as a more comprehensive report on the forward program of technical services maintenance works.

24/07/12 Director Technical Services is negotiating with a gravel road consultant to carry out a review of Council roads and practices. The result of this will be the subject a future report.

345-06-2012 05/06/12 Gravel Rates Cr KS Wendt OAM BEM moved and Cr WJ Bowen seconded: That the Assistant Director of Technical Services review the variable rates of gravel royalty paid by Council and report to the Technical Services meeting 03 July 2012

24/07/12 Gravel rates vary due to material quality and pit:- State controlled pits - $0.47/m3 Private pits - $1.00 to $4.00/m3

A list of currently used pits will be presented at a future Committee Meeting.

346-06-2012 05/06/12 Staatz Road Cr PW Lobegeier moved and Cr PW Francis seconded: That Assistant Director of Technical Services provide a report to Council on the traffic safety of Staatz Road Monto and present at the next Technical Services meeting 03 July 2012

27/07/12 DTS to provide verbal report at the August Infrastructure Services Standing Committee Meeting.

406-07-2012 03/07/12 RMPC Cr PW Francis moved and Cr PW Lobegeier seconded: That Council correspond with Minister of Transport, Scott Emerson MP with a copy to be provided to Deputy Premier, Hon Jeff Seeney MP advising the Minister of Transport of the impact to the North Burnett Regional Council of the proposed reduction in Road Maintenance Performance Contracts

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(RMPC) funds for 2012-13 and the impact on the State Road network.

30/08/12 To be raised with Deputy Premier at meeting on 31 August 2012.

414-07-2012 03/07/12 Camboon Road Resolved: that the Director of Technical Services seeks information on the maintenance works proposed on Camboon Road and Harrami Road and circulate the information to councillors via email.

27/07/12 30/08/12

The Senior Supervisor is currently looking at the forward maintenance program for Camboon and Harrami Roads. Once information is received it will be distributed to Councillors via email. Camboon Road is currently being resheeted and Harrami Road regraded.

415-07-2012 03/07/12 Dust Minimising Policy Resolved: That Director of Technical Services develops a Policy on ''Dust Minimising Action for Rural Properties'' and present at a future Policy and Planning Committee.

24/07/12 30/08/12

Draft Policy written; will go to August MEG prior to going to the Policy and Planning Standing Committee in September. Draft Policy to be included in the September Policy and Planning Standing Committee Meeting

416-07-2012 03/07/12 Road Maintenance Resolution Resolved: That progress reports against resolution- Road Maintenance 339-06-2012 be included in monthly Technical Services Committee Agendas.

30/08/12 Noted by the Director of Technical Services

418-07-2012 03/07/12 Monto Pool Cr PW Lobegeier moved and Cr FO Whelan seconded: That Assistant Director of Technical Services monitor the small leak by logging the top-up rate of the pool to ensue no major change in this rate is occurring. If the leak rate remains at the same level this represents a water cost of approximately $8.30/day.

30/08/12 ADTS is monitoring water usage at the pool

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420-07-2012 03/07/12 Harkness Boundary Creek Bridge Eidsvold Cr PW Francis moved and Cr PW Lobegeier seconded: That North Burnett Regional Council accede to the request to name the Harkness Boundary Creek Bridge in Eidsvold "Warren's Bridge" and progress the request through to the Department of Main Roads.

30/08/12 Letter sent to DTMR on 17 August 2012 (Doc ID 263011) Follow up letter required due to slight amendment with name.

422-07-2012 03/07/12 Paradise Dam Resolved: That the letter from Sunwater concerning proposed works at Paradise Dam be received and Council liaise with Sunwater to arrange a suitable date for a tour of the Paradise Dam construction site

30/08/12 Sunwater will conduct tour of major works at Paradise Dam for Councillors and Directors on Wednesday 5 September 2012.

508-08-2012 07/08/12 Drinking Water Quality Report Cr PW Francis moved and Cr KS Wendt OAM BEM seconded: That the Drinking Water Quality Management Plan be approved and submitted to the Office of the Water Supply Regulator.

30/08/12 Drinking Water Quality Management Plan (Doc ID 255227) submitted to the Office of the Water Supply Regulator on 13/08/12 (Doc ID 262573)

509-08-2012 07/08/12 Road Hierarchy Cr PW Francis moved and Cr KS Wendt OAM BEM seconded: That the Road Hierarchy Register as presented be received and noted that the Road Hierarch Register is part of a Technical Services ongoing review.

30/08/12 Noted by the Director of Technical Services

511-08-2012 07/08/12 Future TIDS Program Resolved: That the Director of Technical Services present a report to the September Technical Services Committee on the Gayndah -Mundubbera Road covering the percentage

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of sealed and remaining un-sealed road.

30/08/12 Report on the Gayndah Mundubbera Road to be included in the September Infrastructure Services Standing Committee Meeting.

513-08-2012 07/08/12 Asbestos in Town Hall Cr KS Wendt OAM BEM moved and Cr FO Whelan seconded: That Council close the supper room and kitchen of the Eidsvold Community Hall for use and seek a Contractor to air-lock these rooms as soon as possible with the replacement of the ceiling panels to take place once the Council budget has been adopted ensuring minimal impact to community at all times.

30/08/12 Tenders have been called for this work. Refer to Tender No. 2314/2012-13/QTB/05.

514-08-2012 07/08/12 Montgomerie Street Resolved: That Director of Technical Services follow-up on the asbestos report for Montgomerie Street structure.

30/08/12 Cr Bowen provided with a verbal report that the asbestos was in the chicken coop.

517-08-2012 07/08/12 Stanton Harcourt Cr KS Wendt OAM BEM moved and Cr PW Francis seconded: That Council support the Road temporary closure of the road reserve and that the landholder be advised to permit to occupy

520-08-2012 07/08/12 Structure Review Cr PW Francis moved and Cr PW Lobegeier seconded: That Council received the proposed Structure Review and endorse the content of the report.

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30/08/12 Changes to the structure of the outside workforce commenced on 27/08/12. The DTS has met with Depot Supervisors/Foreman, Mechanics, LPO’s and the parks teams in Mundubbera and Biggenden. Further meetings with the parks teams planned for next week.

523-08-2012 07/08/12 Cania Dam Road Cr PW Francis moved and Cr FO Whelan seconded: That Director of Technical Services investigate the scheduled works on the culvert at the T-intersection of the Cania Dam Road and Burnett Highway and report to a future Council meeting.

30/08/12 DTMR plan to upgrade the culverts at the start of Cania Dam Road. The actual timing is still uncertain but we expect that it will occur at the completion of the culvert works. Cr Francis has been advised by email.

524-08-2012 07/08/12 Mural Painting Resolved: That Council offer no objection to the proposed mural to be painted on the sewerage treatment plants in Monto.

30/08/12 To be actioned by the Community and Cultural Directorate.

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INFRA 02 – GAYNDAH MUNDUBBERA ROAD

Responsible Officer: Ken Palmer – Director Technical Services Report prepared by: Ken Palmer – Director Technical Services 1 PURPOSE OF REPORT

To inform Council of the current and future work on the Gayndah Mundubbera Road to be funded by the Queensland Reconstruction Authority (QRA), the Transport Infrastructure Development Scheme (TIDS) and Council.

2 INTRODUCTION / BACKGROUND Prior to the December 2010 flood, Council had sought funding from TIDS for the reconstruction of the gravel section of the Gayndah Mundubbera Road over a number of years – 2012/13, 2013/14 and 2015/16. The flood event severely damaged a gravel section that was programmed for reconstruction this financial year. Council sought and received funding from QRA for the reinstatement of this section. Earlier this year Council called tenders for the reconstruction of the flood damaged section and the approved TIDS work for 2012/13. The way the tender schedule of quotation was structured made it extremely difficult to separate out the QRA funded works from the balance of works, to satisfy QRA requirements. As a result Council has reverted back to a proven model. The flood works will be delivered using an existing contractor and Council will construct the TIDS funded component. 3 CORPORATE / OPERATIONAL PLAN Community Infrastructure and Disaster Management “1.3 Infrastructure Delivery”: Strategically plan, provide or facilitate community infrastructure and facilities that will meet community needs. 4 POLICY IMPLICATIONS The proposed works comply with all relevant standards and codes. 5 STATUTORY REQUIREMENTS Nil

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6 FINANCIAL IMPLICATIONS The reconstruction of Gayndah Mundubbera Road is jointly funded by Council and TIDS. The flood restoration work is entirely funded by QRA. 7 RISK MANAGEMENT The proposed works will greatly reduce the risk of the road users by widening the road and improving the surface. Unfortunately road users will drive faster on the new wider sealed road with corresponding increase in risk. 8 CONSULTATION Council officers have negotiated with QRA on the funding of the flood repair works and Warren Paulger on the TIDS component. Council’s District Supervisors were involved in assessing the delivery options. 9 OPTIONS FOR COUNCIL TO CONSIDER Nil 10 OFFICER’S COMMENTS / CONCLUSION The proposed funding for the reconstruction of Gayndah Mundubbera Road is as follows;

Chainage Description Cost Year Start Finish ($1000’s)

00.00 Boondooma Road Intersection

- -

00.00 4.10 2 Lane Bitumen Seal - - 4.10 5.35 Existing Bitumen to

Hardys Lane 194 2012/13

5.35 7.30 Hardys Lane to Range 524 2015/16 7.30 9.20 Existing Bitumen - - 9.20 11.00 Range to River Bend

Property 170 2013/14

11.00 12.41 Existing Bitumen - - 12.41 13.50 Gravel 506 2015/16 13.50 15.10 Gravel 400 2012/13

Total 1,794 Council can request changes through the Regional Road Group to the timing of the various components, providing Council’s allocation in any one year is not altered. Council officers have investigated bringing the works forward to complete this project earlier but decided against such an action as it will adversely affect other roads that urgently need the funds.

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Council’s contribution to Gayndah Mundubbera Road is $897,000 with the balance from TIDS. It should be noted that the program is only fixed for two financial years, as the other years may change depending on level of State funding and priorities.

11 ATTACHMENTS

Nil

12 RECOMMENDATION


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INFRA 03 – HUMPHREY BINJOUR ROAD LANDSLIP REINSTATEMENT


To inform Council of the options for the repair of the landslip on the Humphrey Binjour Road and to seek direction from Council on future discussion with the Queensland Reconstruction Authority (QRA).

2 INTRODUCTION / BACKGROUND During the December 2010 floods a significant landslip occurred on the Humphrey Binjour Road effectively closing the road. The Queensland Reconstruction Authority (QRA) has accepted the project for funding although the scope of work is subject to ongoing discussions. Council has engaged consulting engineers to undertake preliminary assessment of the landslip site and to cost various options. 3 CORPORATE / OPERATIONAL PLAN Community Infrastructure and Disaster Management “1.3 Infrastructure Delivery”: Strategically plan, provide or facilitate community infrastructure and facilities that will meet community needs. 4 POLICY IMPLICATIONS Nil 5 STATUTORY REQUIREMENTS Nil

6 FINANCIAL IMPLICATIONS The repair work is fully funded by QRA, although there may be some resistance to paying a large amount to reinstate a low volume road. Approximately 56 vehicles per day travel this section of road. 7 RISK MANAGEMENT The terrain and soil type is such that the area is susceptible to landslips. The reinstatement must be safe for all road users and meet community needs.

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8 CONSULTATION

Council officers have discussed the project with QRA. The CEO of QRA has visited the site.

9 OPTIONS FOR COUNCIL TO CONSIDER The options for Council are:

Close the road Reinstate to a single lane Reinstate to two lanes, as it was prior to the landslip.

If Council closes the road, the only option for vehicle access to the area between

the landslip and the river, is the bridge over the Burnett River. Approximately 100 vehicles per day use the bridge. If the bridge was closed the area would be isolated, and the two dairies would not be able to get their products to market. If the products went via the bridge to Gayndah there would not be a problem as the road is sealed, but to Mundubbera there would be a major problem at the present time due to the gravel road and vertical and horizontal alignment issues.

The upgrade to the Mundubbera Gayndah Road will be finished in 2015/16. Council

has committed Regional Road Group funding this year and next financial year.

To reinstate the road to a single lane will cost $2 million. The work would require stabilising the bank above and below the road and constructing a single lane with a mid-point passing bay controlled by traffic activated traffic lights.

To reinstate the road to its pre-slip condition will cost $4 million. It should be noted that the costs are estimates only and due to the nature of the work the cost could escalate by up to 50%.

10 OFFICER’S COMMENTS / CONCLUSION The issue that Council needs to address is how much Council would be prepared to pay to establish access to a small area that has an alternative access that may be cut off if the Burnett River floods. Although the work will be funded by QRA, Council must be aware of the overall cost, as the reconstruction funds are not a ‘bottomless pit’. To reinstate to two lanes at a cost of $4 million is considered unreasonable for 56 vehicles per day. Council should pursue the reinstatement to a single lane controlled by traffic activated solar powered traffic lights. Council can put up a good argument that Council is prepared to accept a lower level of service in order to keep the overall cost down while still maintaining all weather access to this area.

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13 ATTACHMENTS Arup’s Slope Remediation Works Report – Option Analysis InfoXpert Document ID 221218

14 RECOMMENDATION

That Council negotiate with the Queensland Reconstruction Authority for the

reinstatement of the Humphrey Binjour Road to a single lane controlled by traffic lights.

That Council inform the affected property owners of Council’s direction.

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of 3

FW: Humphrey Binjour Road Landslip Repair - Slope RemediationWorks -Options Analysis (revised)

From : Warren Paulger '[email protected]'

To : Chris Littlejohns '[email protected]';

Sent : 21 May 2012 17:40:23

Attachments : @ Detail Estimate.xls (48KB) @ Option Analysis 20120416.pdf(346KB)

This is the data you were seeking.

While there is no problem with calling me anytime, I typically don't have my personalcomputerwith mewhen I am at TMR (Mon - Wed) so where I need to access data, I do that in the late afternoon / evening.

Warren Paulger

Mobile 0458 524 027Email: [email protected]

From: Warren Paulger [mailto:[email protected]]Sent: Friday, 20 April 2012 3:00 PM

To: Ken Palmer; Chris LittlejohnsCc: Tyronne MeredithSubject: FW: Humphrey Binjour Road Landslip Repair - Slope Remediation Works - Options Analysis(revised)

Attached is a final revised report from ARUP on option for action on the slip at Humphrey-BinjourRd. I amsatisfied with the report in its current formatsuch that with the Geotech Report and a suitablesummary oftotal costs should be suitable for QRA submission, until a final design is completed for detailed pricing andtendering. A summary of the costingsand options is as follows. (Seethe attached spreadsheetforclarification how the costs were determined.

As you can see, the Council nominated option for maintaininga one-way link only is in the order of $2M. Weneed to discuss how you wish to proceed.

TOTAL WORKS COST ESTIMATES

OPTION UPSIDE DOWNSIDE ROADWORKS TOTALOption Estimate Option Estimate Option Estimate

A 2.1 (1) $1,626,522 3.1 (3) $2,018,626 2 lane $394,650 $4,039,798B 2.1 (1) $1,626,522 3.2 (4) $1,243,424 2 lane $394,650 $3,264,596C 2.1 (1) $1,626,522 3.3 (5) $3,653,012 2 lane $394,650 $5,674,184D 2.1 (1) $1,626,522 3.4 (6) $1,401,536 2 lane $394,650 $3,422,708E 2.2 (2) $2,394,408 3.1 (3) $2,018,626 2 lane $394,650 $4,807,684F 2.2 (2) $2,394,408 3.2 (4) $1,243,424 2 lane $394,650 $4,032,482G 2.2 (2) $2,394,408 3.3 (5) $3,653,012 2 lane $394,650 $6,442,070H 2.2 (2) $2,394,408 3.4 (6) $1,401,536 2 lane $394,650 $4,190,594

I 4 $0 4 $1,741,736 1 lane $273,565 $2,015,301

Warren Paulger

http://infoxpert/docs/Workspace/TS/Assets%20%20Dept/NDRRA%20Dec-Feb%20Fl...31/08/201232

Technical Note

J:\222000\222124-00\DOCUMENTS\TECHNICAL NOTES\OPTION_ANALYSIS_20120416.DOCX

Page 1 of 15©Arup | F0.15 | 14 February 2011

Project title Humphrey Binjour Road Landslip Repair Job number

222124

cc Warren Paulger File reference

222124/KO/TN01/Rev B

Prepared by Karen Oj (Brisbane) Date

16 April 2012

Subjecti

Slope Remediation Works - Option Analysis

1 IntroductionAs part of the slope remediation design to repair the landslip sections at Humphrey Binjour Road, this technical note presents the options for the cutting and embankment upgrading works. Site constraints will also be discussed for each option to aid the decision on the preferred solution.

2 Remediation Works – The Cutting

2.1 Option 1: Cut Back and Soil Nail The existing cutting to be cut back at maximum 1 in 1.5 slope at 7m lift with intermediate berms of 6m wide.

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Technical Note 222124 16 April 2012



At the lower half of Humphrey Binjour Road where the existing cut slope profile becomes more even and gentle, cutting back of 1 in 1.5 batter slope is less suitable as it chases up the natural slope. Steeper cut batter at approximately 55 as well as soil nailing stabilisation is therefore proposed at this section. The upper natural slope profile remains unchanged. Finished slope will be hydroseeded with soil erosion netting at steeper slopes for surface protection.

Advantages

Regrade the cut slope to a stable gradient and thus improve the stability of the entire slope;

Significantly reduce the likelihood of slope instability in long term;

Excavation work can be carried out from the top of the slope to minimise impacts to the road operation;

Minimal maintenance is required at the cut slopes in long term;

Disadvantages

Land resumption is required;

Extensive earthwork and removal of spoil off site will be involved which may impact local traffic;

Environmental permit and approval may be required;

Constraints

The proposed cut batters at the upper half of the road will be outside of the current road reserve boundary at the crest of the cutting by approximately 17m. Land resumption will be required;

Soil nailing works require specialist contractors for installation which may not be available in the locality;

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According to DERM Mapped Regional Ecosystem (version 6.1) the cutting site is mapped as consisting of sub-dominant endangered remnant vegetation (RE 11.5.17). The initial ecological survey has confirmed that the vegetation community along the cut face and crest is characteristic of RE 12.5.1 and RE 11.5.15, both classified as ‘not of concern’. Consultation with DERM regarding potential exemptions should be initiated and permit application for removal of vegetation may be prepared and submitted to DERM;

Preliminary Cost Estimate

Item Unit Rate ($) Quantities Cost ($) Slope Excavation m3 20 11,680 233,600 Soil Nail m 250 2,400 600,000 Drainage Channels m 110 800 88,000 Hydroseeding m2 3 3,850 11,550 Drape Mesh Surface Protection m2 85 1,370 116,450

Estimated Total (ex. GST) 1,049,600

2.2 Option 2: Soil Nail Soil nails can be used to upgrade the condition of the cutting. Typically soil nailing involves minimal disturbance to the existing slope profile which means remnant vegetations on the cut face and at the slope crest can be retained. Preliminary design indicates soil nail steel bars of 15m in length, grouted within 150mm diameter drilled holes with 2.25m vertical spacing and 1.5m horizontal spacing can improve the factor of safety of the cutting to 1.5. Finished slope will be hydroseeded with soil erosion netting for surface protection.

Similar to Option 1, soil nailing alone on the slope at the lower half of the road is not cost effective in terms of improving the factor of safety of the slope due to the slope geometry. Benching with cut batter at approximately 55 as well as soil nailing stabilisation is therefore proposed (refer to Option 1 Cut Back and Soil Nail solution on P.2).

Advantages

Limited earthworks are involved;

Less disturbance to the existing ecological communities;

Long term stability of the slope is improved by the structural support of soil nails;

Disadvantages


Construction period for installation may be longer than Option 1;

Higher construction cost in comparison to Option 1;

Environmental permit and approval may be required;

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Constraints

The extent of soil nails at the top rows will be outside of the current road reserve boundary at the slope crest by approximately 5m;


Road closure or reduced lane width for traffic may be required during soil nail installation;

According to DERM Mapped Regional Ecosystem (version 6.1) the cutting site is mapped as consisting of sub-dominant endangered remnant vegetation (RE 11.5.17). The initial ecological survey has confirmed that the vegetation community along the cut face and crest is characteristic of RE 12.5.1 and RE 11.5.15, both classified as ‘not of concern’. Consultation with DERM regarding potential exemptions should be initiated and permit application for removal of vegetation may be prepared and submitted to DERM;


Item Unit Rate ($) Quantities Cost ($) Slope Excavation m3 20 1,810 36,200 Soil Nail m 250 5,618 1,404,500 Drainage Channels m 110 600 66,000 Hydroseeding m2 3 3,385 10,155 Drape Mesh Surface Protection m2 85 2,650 287,725


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3 Remediation Works – The Embankment

3.1 Option 3: Excavate and Backfill The slipped road embankment to be excavated in temporary benches, backfilled to a typical 1 in 2 batter and compacted to TMR standards of minimum 96% maximum density. Laboratory testing indicates that residual soils and extremely weathered Basalt from the cutting can be used as general fill as per the requirements of MRTS04.

At some locations 1 in 1.5 finished batter is required at the embankment to suit the existing terrain. Engineering backfill will be required at these locations.

Advantages

Easy to construct. Can be constructed using conventional earth moving plants;

Relatively quick construction;

Relatively cheap in construction cost;

Slipped material is removed from the embankment. Minimal maintenance is required in long term;

Disadvantages



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Environmental approval and permit are required;

Road closure is required during the works;

Constraints

The extent of excavation and backfill at the toe of the embankment will be outside of the current road reserve boundary by approximately 13m;

In situ material from the cutting is not suitable to use as engineering backfill. Engineering backfill will require out-sourcing;

Removal of slipped embankment will result in impacts to the semi-evergreen vine thicket vegetation patches identified on site. This community is listed as a matter of national environmental significance as an endangered threatened ecological community. Actions that may constitute a significant impact to this vegetation community require referral to the Commonwealth Department of Sustainability, Environment, Water, Population and Communities (DSEWPC) for a decision on whether the actions requiring approval;


Item Unit Rate ($) Quantities Cost ($) Embankment Excavation m3 20 5,310 106,200 Engineering Backfill and Compaction

m3 100 11,320 1,132,000

Drainage Channels m 110 440 48,400 Hydroseeding m2 3 1850 5,550


3.2 Option 4: Gravity Retaining Wall Gravity retaining wall such as gabion basket units can be constructed at the toe to stabilise the embankment. The failed embankment material should be excavated to allow engineering backfill and compaction. The backfill should be free draining granular backfill and reinforced by geogrid if required. Behind the top of the gabion units the ground can be gently sloped to match the existing road level.

The toe wall can be placed at the limit of road reserve boundary so that no land resumption is required.

Advantages

Relatively flexible retaining structure which can withstand minor wall deflection. The gabion wall is appropriate for an embankment with some ground movement;

Gabion wall is easy and quick to install;

Can be constructed using conventional earth moving plants;

The wall can be designed such that the permanent work does not go outside of the road reserve boundary;

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Disadvantages


Rockfill for gabion units and free draining engineering backfill will require out-sourcing;

The extent of temporary excavation is likely to encroach the existing road. Temporary road closure may be required;

Routine inspection and maintenance are required to check the integrity of the gabion units and the road pavement;

Higher construction cost in comparison to Option 3;


Constraints

Soil reinforcement installation is to be undertaken by specialist contractor which may not be available in the locality;

Removal of slipped embankment will result in impacts to the semi-evergreen vine thicket vegetation patches identified on site. This community is listed as a matter of national environmental significance as an endangered threatened ecological community. Actions that may constitute a significant impact to this vegetation community require referral to the DSEWPC for a decision on whether the actions requiring approval;

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Item Unit Rate ($) Quantities Cost ($) Embankment Excavation m3 20 2,830 56,600 Engineering Backfill and Compaction

m3 100 4,250 425,000

Gabion Units m3 150 1,760 264,000 Drainage Channels m 110 440 48,400

Estimated Total (ex. GST) 794,000

3.3 Option 5: Embedded Bored Pile Wall Contiguous bored piles can be installed from the existing road and extended on to rockhead level to form an embedded wall. Pile diameter is estimated to be 750mm with pile spacing of 1.125m centres and pile length of approximately 11m. The top of the piles are restrained by a capping beam to help spreading the load onto the piles and to limit pile head displacement.

The design of the embedded pile wall assumes the lateral earth pressure and the traffic loading are taken by the wall structure. Instability of the existing embankment will not affect the wall stability. As a result, the piles are installed at the edge of the existing road without the need for embankment excavation.

Advantages

Less disturbance to the existing ecological communities;

A robust retaining system to limit the ground movement and thus limit future cracking at the pavement;

Embankment failure in front of the bored pile wall does not affect the stability of the road;

Permanent work does not go outside of the road reserve boundary;

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Minimal maintenance is required in long term;

Disadvantages

Highest construction cost;

Piling operation will be carried out from existing road level. Temporary road closure will be required;

Constraints

Limited works areas on site for drilling rig, reinforcement cage installation and concreting. Sequence of work shall be carefully planned;


Item Unit Rate ($) Quantities Cost ($) Bored Piles 750mm diameter 40MPa

m 1,350 1,965 2,654,850

Drainage Channels m 110 440 48,400 Estimated Total (ex. GST) 2,703,250

3.4 Option 6: Soil Nail and Gabion Facing The failed embankment material is to be excavated and supported by soil nails. Preliminary analysis indicates that soil nails to be 8m long, grouted in 150mm diameter drilled holes, and spaced at 2m both horizontally and vertically. Gabion units are used as facing as well as to make up the required road width.

The soil nailed embankment will have a minimum factor of safety of 1.5.

Advantages

Gabion facing can be used to make up the road width for widening;

Soil nailing improves the stability of the embankment. It limits future ground movement at the embankment and thus prevents cracking at the road pavement;

The work can be designed such that permanent work is within road reserve boundary;

Disadvantages


Rockfill for gabion units will require out-sourcing;

The extent of temporary excavation is likely to encroach the existing road. Temporary road closure may be required;

Routine inspection and maintenance are required to check the integrity of the gabion units;


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Constraints

Soil nailing works require specialist contractor for installation which may not be available in the locality;

Removal of slipped embankment will result in impacts to the semi-evergreen vine thicket vegetation patches identified on site. This community is listed as a matter of national environmental significance as an endangered threatened ecological community. Actions that may constitute a significant impact to this vegetation community require referral to the DSEWPC for a decision on whether the actions requiring approval;


Item Unit Rate ($) Quantities Cost ($) Embankment Excavation m3 20 2,830 56,600 Soil Nails m 250 2,424 606,000 Gabion Units m3 150 1,700 255,000 Drainage Channels m 110 440 48,400

Estimated Total (ex. GST) 966,000

4 Remediation Works - Road Widening A joint site visit was undertaken on 2nd March 2012 with Council representative to identify the feasibility of road widening between chainages 145 and 220m and the associated slope remedial works.

The proposed road widening is to increase the width of the current single lane road from <6m to a minimum of 6m (and up to 7m, if achievable), allowing the upgraded section to fit in two lanes between chainages 145

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and 220m. The upgraded section of the road will enhance the safety of the road users by providing extra space for vehicles when overtaking.

Between chainages 0 and 145m, it is proposed that the existing carriageway is to operate as a one traffic lane road with appropriate signage and markings at both ends. Road widening is to be carried out as far as possible into the current base of the cutting. The pavement is to be modified to one-way cross-fall with pavement kerb and channel installed along the cutting to allow collection of surface runoff. The runoff will be discharged across the road at designated outlets to control impacts on the embankment. Existing overhanging materials are to be removed from the cutting face.

On the outer side of the one-lane segment, it is proposed that the existing pavements cracks along the top of the embankment are sealed with bitumen crack sealer. A steel guardrail is to be installed to keep traffic off the current cracked areas and to limit the traffic lane to approximately 4.5 to 5m to cater for 19m B-Double vehicles.

A key driver for the proposed limited remediation on the cutting and the embankment are the environmental considerations (presence of environmentally significance vegetation) and the potential difficulty and time constraints for getting environmental approvals from State and Federal Governments if these vegetations are to be impacted.

This option has a number of advantages such as less environmental impact on vegetation, allows B-Double vehicles better line of site and improvement in the pavement drainage. However the disadvantages of not upgrading the entire slipped section include the requirement of regular monitoring and inspection at the cutting and embankment, maintenance and sealing of crack pavement, slips may occur in unremediated areas.

Advantages

Less disturbance to existing ecological communities;

Minimum earthwork is involved;

Current one lane road is upgraded to two-lane between chainages 145 and 220m, which provides extra space for vehicles when overtaking;

Upgrading the pavement and constructing channel and kerb between chainages 0 and 145m provides extra space for guardrail installation. The guardrail helps to keep the traffic out of the cracked areas;

Surface drainage is improved;

Can be completed quickly as environmental approvals are likely not to be required;

Disadvantages

Deterioration in slope condition and possibility of slips in unremediated areas could be expected;

Regular monitoring, inspection and maintenance at the cutting and the embankment are required. Pavement repair (eg. crack sealing) along the top of the embankment is also likely required in long term;

Clear fall zone is reduced by constructing surface drainage at the base of the cutting. This increases the possibility of slipped material landing on the road and impacting the road users;

Soil nailing and piling operation are carried out from existing road level which will require temporary road closure;

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Constraints

Given the environmental considerations, the earthworks involved and extent of works are kept to a minimum;

The conditions of the cutting and the embankment between chainages 0 and 145m basically remain unchanged. The identified risks of not having remediation work at these locations are:

The cutting comprises of high plasticity clay of very high liquid limits. This type of soil has high shrink and swell potential in dry and wet seasons, which may lead to cracking at the slope surface and forming deep scour paths by surface runoff. Condition of the existing cutting is likely to deteriorate if no surface protection and slope stabilisation is provided. Debris from soil slips accumulating at the slope toe and soil overhanging at the slope surface are commonly observed on site; Given the limited clear fall zone at the bottom of the cutting, the debris slipped from the slope surface is likely land on the road. Warning signs should be considered to alert the road users particularly within the winding section of the road where sight distance is limited; Installation of slope mesh over the slope face or catch fence along the slope toe could be used to limit the impacts of soil slip. Maintenance is required to remove any debris accumulated within the mesh / fence. As the slope condition has not been improved, slip materials may overflow the barrier and spill onto the road. Due to limited space and the minimum lane width requirement, a more robust barrier system along the slope toe may not be feasible; Road widening by constructing channel and kerb into the current base of the cutting reduces the clear fall zone. This increases the possibility of the slip materials landing on to the road and impacting the road users; The embankment has history of previous movement and tension cracks are observed at the pavement along the crest. The cracks allow surface water infiltration into the embankment and cause slumping. The extent of embankment movement is likely to encroach into the road if no stabilisation is carried out;

Between chainages 145 and 220m, soil nailing is proposed at the lower part of the cutting only to minimise disturbance to the vegetation system on the slope above. This solution enhances the stability of the lower slope only. The condition of the upper slope remains unchanged and is likely to continue scouring and deteriorate over time. Slip from the upper slope could be possible particularly following heavy rainfall events;

Regular monitoring and maintenance is required, particularly following significant rainfall events:

Scale back any loose and overhanging soil / rock from the cut face; Regrade the slip scarp to a stable slope angle; Remove slipped debris at the bottom of the cutting; Clear drainage channel and culverts; Seal pavement cracks; Monitor embankment movement and development of pavement cracks; Backfill voids or scarps at the embankment to prevent undermining the pavement;

Limited works areas exist on site for drilling rig, reinforcement cage installation and concreting. The sequence of work will require careful planning;


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Item Unit Rate ($) Quantities Cost ($) Bored Piles 750mm diameter 40MPa

m 1,350 670 904,500

Soil Nails m 250 1,170 292,500 Concrete Skin Wall m3 500 150 75,000 Drainage Channels m 110 150 16,500


5 Assumptions and Limitations The engineering solutions presented in this technical note are based on preliminary analysis only. The actual work extent, dimension, quantities of the remedial works are to be refined and confirmed in the detailed design for the preferred option.

The preliminary cost estimates for the proposed options assumed the full lengths of cutting (180m) and embankment (220m) are to be remediated. The exception is the road widening option which the proposed work are carried out between chainages 145 and 220m only.

Cost estimates for the remediation works have been determined based on the costs for works from projects undertaken on behalf of the DTMR and costs of works published within Australian Construction Handbook 29th Edition 2011.

The cost estimates presented are for the purpose of cost comparison only and should not be treated as the actual cost of works. The estimates exclude costs associated with land resumption, permit application and approval, vegetation offset and plantation, contractor mobilisation and site setup, temporary traffic management, engineering site supervision, etc.

6 RecommendationsBased on the preliminary assessment, the options for slope remediation are listed below in the order of engineering preferences:

Cutting

1. Option 1: Cut Back 2. Option 2: Soil Nailing on entire slope 3. Option 7: Soil Nailing at lower slope only between Chainages 145 and 220m

Embankment

1. Option 6: Soil Nailing and Gabion Facing 2. Option 3: Excavate and Backfill 3. Option 4: Embedded Retaining Wall along Full Length of Embankment 4. Option 5: Gravity Retaining Wall 5. Option 7: Embedded Retaining Wall between Chainages 145 and 220

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INFRA 04 – TECHNICAL SERVICES PRESENTATION


To inform Council of a series of presentations by Technical Services staff to Council relating to the management and operation of the Directorate.

2 INTRODUCTION / BACKGROUND

Technical Services staff propose to make the following presentation to future meetings of the Technical Services Standing Committee Meeting: September - Fatigue Management October - Council’s new mapping system November - Asset Management December - Project Management If Council wishes Technical Services to make a presentation on any subject please let

us know, at least four weeks in advance. 3 CORPORATE / OPERATIONAL PLAN Nil 4 POLICY IMPLICATIONS Nil 5 STATUTORY REQUIREMENTS Nil

6 FINANCIAL IMPLICATIONS Nil 7 RISK MANAGEMENT Nil 8 CONSULTATION Nil

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9 OPTIONS FOR COUNCIL TO CONSIDER Nil

10 OFFICER’S COMMENTS / CONCLUSION Nil

2 ATTACHMENTS

Nil

3 RECOMMENDATION


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cover page - ps...works will be completed by trevor taylor (gayndah) tids component of $400,000.00...

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