2.13 - SECTION B SPECIFICATIONS APPENDIX A DAM ROUTINE ... · Document History and Status Rev Date...

Section B Specifications Vegetation Management CD040/2017

Technical Services – Roads & Hydraulics Dam Maintenance Schedules i

2.13 - SECTION B SPECIFICATIONS

APPENDIX A

DAM ROUTINE VEGETATION MANAGEMENT PACK

AUGUST 2017

Document History and Status

Rev Date Reviewed by Revision details

Author(s): Felix Chigama (Hydraulics Advisor - Hydraulics)

Project: Dam Vegetation Management Pack

Report Type:

File Path: N:\Strategic Procurement\Contract Documentation & Information\Request For Quotations\Dam Vegetation Management Service Contract\Dams Vegetation Management Pack (4).docxCatchment Investigations\DAMS\Vegetation Management

Contents

Introduction 1

Intent of Schedules ........................................................................................................ 1

Strategic Fit ................................................................................................................... 1

1 Mount Pleasant Dam (ID. 701695) ............................................................................................ 1

1.1 Site Location: Kings Meadows, TAS 7249 ............................................................... 1

1.2 Key Information: Routine Maintenance Activities on this site are done by the Contractor. ............................................................................................................. 1

1.3 Routine Maintenance Activity Breakdown ............................................................ 1

1.4 Landownership and Access................................................................................ 1

1.5 Known Hazards/Risks ......................................................................................... 1

2 Streamside Detention Basin (ID. 451258) ................................................................................. 2

2.1 Site Location: Kings Meadows, TAS 7249 ........................................................... 2

2.2 Key Information: Routine Maintenance Activities on this site are jointly done by Council (Parks Services Department) and Contractor. ................................................... 2


2.4 Landownership and Access................................................................................. 2


3 Connector Park Detention Basin (ID. 701696) .......................................................................... 3


3.2 Key Information: Routine Maintenance Activities on this site are done by the Contractor. ..................................................................................................................... 3




4 Queechy Lake (ID. 442853) ....................................................................................................... 4

4.1 Site Location: Norwood, TAS 7250 ...................................................................... 4

4.2 Key Information: Routine Maintenance Activities on this site are done by Council (Parks Services Department), except for tree trimming and facing by Contractor. ......... 4




5 Waverley Lake (ID. 454358) ...................................................................................................... 5

5.1 Site Location: Waverley, TAS 7250 ..................................................................... 5

5.2 Key Information: Routine Maintenance Activities on this site are done by Council (Parks Services Department), except for one-off tree removal on downstream face of the high dam embankment by Contractor. ........................................................................... 5




6 Southgate Drive (ID. 451230) .................................................................................................... 6


6.2 Key Information: All Routine Maintenance Activities on this site are done by Council (Parks Services Department). ........................................................................................ 6




7 Poplar Parade Detention Basin (ID. 701407) ..................................................................... 7

7.1 Site Location: Youngtown, TAS 7249 .................................................................. 7

7.2 Key Information: All Routine Maintenance Activities on this site are done by Council (Parks Services Department). ........................................................................................ 7




8 Parklands Parade Detention Basin (ID.701697) ................................................................ 8

8.1 Site Location: Newnham, TAS 7248 .................................................................... 8

8.2 Key Information: Routine Maintenance Activities on this site are done by Council (Parks Services Department). ........................................................................................ 8




Technical Services – Built Environment - Hydraulics Dam Vegetation Management Project Number Page 1 of 1

Introduction

Intent of Schedules

The intent of these Dam Maintenance Schedules is to provide information for external contractors

to provide Council with a price for undertaking periodic maintenance work on dams not maintained

by Council and third parties. The schedules outline activities to be undertaken by the contractors at

each site i.e. grass/weed slashing and control, and eradication of identified invasive plants on the

dams.

Strategic Fit

To facilitate the Operation and Maintenance (O&M) of dams, in compliance with the Water Management Act 199 (Part 8A - Safety of Dams), and ANCOLD (Australian National Committee on Large Dams) Guidelines on Dam Safety Management - 2003, City of Launceston has a Dam Safety Management Program which includes frequent vegetation management of its dams to facilitate optimum performance.

The Dam Safety Management Program is a combination of policy, procedures and activities which, when methodically carried out, will ensure that each dam remains safe.


DAM SAFETY MANAGEMENT PROGRAM

Routine Monitoring & Surveillance

Dam Safety Management Procedures

Operation & Maintenance

Personnel & Training

Hazard Classification

DSEMP

Dam Safety Reviews


1 Mount Pleasant Dam (ID. 701695)

1.1 Site Location: Kings Meadows, TAS 7249

1.2 Key Information: Routine Maintenance Activities on this site are done by the

Contractor.

1.3 Routine Maintenance Activity Breakdown

Grass Slashing on dam embankment Weed Spraying (Paterson's Curse) on dam embankment. Weed Spraying on access roadway.

1.4 Landownership and Access

Private land, to gain access, ask Council to contact the landowner beforehand. Lockable bollards get keys from Council Operations. Access via industrial area and residential areas

1.5 Known Hazards/Risks

Traffic entering and exiting industrial yards. Residential area Secure the site i.e. locks bollards on leaving.

Additional Works: Scarifying, re-topsoiling and hydro-mulching of dam embankment to be done as reactive works, Council to request quote from Contractor.


2 Streamside Detention Basin (ID. 451258)


2.2 Key Information: Routine Maintenance Activities on this site are jointly done by

Council (Parks Services Department) and Contractor.


Tree & Bush trimming on east side of embankment to expose top of batter on eastern embankment, approx. 50m length, (Contractor).

Grass slashing by Council (Parks Services Department). Weed Spraying (hogweed, gorse) by Council (Parks Services Department). Monitor longitudinal cracks by Council (Investigations Department).

Other planned works: Council to review current positioning of an access gate immediately downstream of the dam overspill structure, in case of potential debris blockage.


Gated access (no key) via Kings Meadows Link through industrial area and residential precinct.


3m wide crest with deep longitudinal cracks on eastern side. Avoid propagating weeds; check equipment before leaving site.


3 Connector Park Detention Basin (ID. 701696)


3.2 Key Information: Routine Maintenance Activities on this site are done by the

Contractor.


Grass slashing Spraying of blackberry and gorse Removal & treatment of self-setting small trees on dam batters


Private land, inform Council and call at Webster Trucks reception for permission to work. Gated Access to business premises.


Webster Trucks daily business (site traffic & pedestrians).


4 Queechy Lake (ID. 442853)

4.1 Site Location: Norwood, TAS 7250

4.2 Key Information: Routine Maintenance Activities on this site are done by Council

(Parks Services Department), except for tree trimming and facing by Contractor.


Glass Slashing Weed Spraying (blackberry, gorse) Tree trimming and facing on downstream batter, approx. 150m (adjacent to the North Esk

River), by Contractor. Willow management by Council (Parks Services Department.)


Council land tenure. Access off Queechy Road.


Grass can be too overgrown - lack of ground visibility. Wheel rutting on embankment Aquatic wildlife


5 Waverley Lake (ID. 454358)

5.1 Site Location: Waverley, TAS 7250

5.2 Key Information: Routine Maintenance Activities on this site are done by

Council (Parks Services Department), except for one-off tree removal on downstream face of the high dam embankment by Contractor.


Grass Slashing by Council (Parks Department). Weed Spraying by Council (Parks Department). Remove trees as directed by Superintendent (Contractor).Project superintendent should

engage Council's communications department before removing any of the trees. This is a recommendation from the JMG 2002 report 1-0002AB2F.


Council local amenity facility (juvenile fishing and walking). Access/egress from Faraday/Naroo/Magnet Streets roundabout.


Hidden public carpark near entrance to lake Narrow dam embankment crest (3m) for driving on northern and western sides Amenity activities - dog walkers etc. Lake is adjacent to primary school, path seldom used by the school for cross country

competition Aquatic wildlife.


6 Southgate Drive (ID. 451230)


6.2 Key Information: All Routine Maintenance Activities on this site are done by

Council (Parks Services Department).


Grass slashing by Council. Spot weed spraying (Paterson's Curse) by Council.


Access via industrial area and residential area


Located within residential precinct, public open space. Manage potential risk of spreading Paterson's Curse from adjacent Mt Pleasant Dam.


7 Poplar Parade Detention Basin (ID. 701407)

7.1 Site Location: Youngtown, TAS 7249

7.2 Key Information: All Routine Maintenance Activities on this site are done by



Grass Slashing on embankment and within basin. Weed Spraying as required. Debris clearing around headwalls and bear cages


Council-owned site with TasWater access rights. Quadruple locked gate, Parks key to be added. Lock gate before leaving site.


Adjacent to houses on Poplar Parade Check no open manhole/s in detention basin Protruding headwalls structures may damage equipment Potential blockage to bear cage outlets from cuttings, clear before leaving site. .


8 Parklands Parade Detention Basin (ID.701697)

8.1 Site Location: Newnham, TAS 7248

8.2 Key Information: Routine Maintenance Activities on this site are done by



Grass Slashing on embankment and within basin. Weed Spraying as required. Debris clearing at inlet around PC ring and domed grate.

Other planned works: Council to consider replacing big rip-rap rocks at entrance with heavy duty boom gate to deter trespassing.

Concrete spillway and slope protection rip-rap to be repaired under intermittent works.


Detention basin is located at the end of the road in Parklands Parade.

Schools; Shopping centres


Massive granite rip-rap stones blocking entrance (trespass deterrent). Weed Spraying as required. Debris clearing around inlet PC ring and cage.

2.13 - SECTION B SPECIFICATIONS APPENDIX A DAM ROUTINE ... · Document History and Status Rev Date...

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