Brookvale Oval Investigation - Warringah Council - NSW Government

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5. Development Opportunities 5.1 Resurfacing Options and Maintenance The two factors affecting the condition of the existing field and its potential for increased use are the excessive thatch layer and the very poor drainage capacity of the topsoil. If these two issues are not addressed then the condition of the playing surface will deteriorate; good presentation cannot be guaranteed and usage levels will be reduced. Any option for improvement should address these two issues. • Thatch Layer: The thatch layer can be quite easily removed by specialised turf equipment without adversely affecting the surface contours, and the kikuyu turf can be regenerated from the remaining plant material. There may be a need for minor turfing into very weak areas such as the player entry point, but a firm grass cover will be achieved in about 8 weeks if carried out in the kikuyu growing season. • Drainage Improvement: Improvement of the drainage capacity of the existing topsoil can only be achieved by installation of a network of sub-surface pipes and sand trenches. The sub-surface pipes would be installed along the length of the field, spaced at 10 metre centres, with the sand trenches running across the field at 2 metre centres. This design would allow surface water to quickly move into the drainage system rather than traversing the whole field. The issues of the thatch and drainage capacity will be eliminated by either of the following two proposed options (i.e. partial reconstruction or full reconstruction). Option Works involved Estimated Cost Time Required for Works Partial • thatch removal Reconstruction • sub-surface drainage pipes • sand trenches $140,000 3 weeks • sand carpet • irrigation repairs grow-in: 8 weeks • soil amendments Full Reconstruction • excavation of existing surface • shape sub-base • new sub-surface drainage system • new irrigation system • replacement of topsoil layer • amendments • grassing $480,000 6 - 8 weeks grow-in: 16 weeks Brookvale Oval Investigation Final Report (February 2010) Page 13
The benefits and ramifications of each of the options are summarised below. Option Benefits Ramifications Partial Reconstruction • Reduced cost • Poorly draining soil remains • Reduced time required • Need for regular deep aeration • Can be done in normal offseason works • Provides improved surface • Increased potential usage Full Reconstruction • Provides premier quality surface • Replaces poorly performing soil drainage and irrigation systems • Increased durability of turf • Increased potential usage • Higher cost • Longer construction period • Works may impact on normal use agreements The potential usage for each option is summarised in the following table. Option Winter Summer Current condition 10 hours / week 15 hours / week Partial reconstruction 15 hours / week 20 hours / week Full reconstruction 20 hours / week 25 hours / week 5.2 Maintenance & Renovation There is a need to review and to likely increase the maintenance inputs for the field to ensure that a durable turf surface is provided and the investment of any improvements is safe guarded. Renovation of the playing surface is required at the end of the NRL season to repair any damage sustained and rejuvenate the surface in preparation for the next football season. This procedure may require intensive operations such as scarifying, turf sodding, topdressing etc. and would necessitate the field being out of play for up to 4 weeks. The following cost estimates are provided to cover a standard level of maintenance & renovation for a high quality sportsfield. Item Cost Mowing (x 70 cuts) $25,000 Fertilising (x 8) $6,000 Pest control (weeds, insects: x 3) $5,000 Aeration (verti drain x 2, slicing x 4) $5,000 Renovation - Scarifying $1,000 Renovation - Overseeding $3,000 Renovation - Topdressing $7,000 Renovation - Surface repair - sod (200m 2 ) $1,500 Repair - irrigation system $3,000 Miscellaneous $3,000 Total Cost $59,500 Note; this does not include the cost of water Brookvale Oval Investigation Final Report (February 2010) Page 14
Page 1 and 2: Brookvale Oval Investigation Warrin
Page 3 and 4: Executive Summary Brookvale Park is
Page 5 and 6: 1. Introduction Brookvale Park is a
Page 7 and 8: The presence of the thatch material
Page 9 and 10: The daily watering schedule may be
Page 11 and 12: 3. Irrigation System Audit An audit
Page 13: • Ideally the Sea Eagles would li
Page 17 and 18: The following diagrams show potenti
Page 19 and 20: With the available time left after
Page 21 and 22: 6. Recommendations The following re
Page 23 and 24: Appendix 2: Photographs Overview of
Page 25 and 26: Appendix 3: Council, Stakeholders &
Page 27 and 28: Parks Leisure Australia • There i
Page 29 and 30: Brookvale Oval Audit Report Includi
Page 31 and 32: FIGURES Figure 1 Sprinkler layout .
Page 33 and 34: 2: EXECUTIVE SUMMARY Irrigation Man
Page 35 and 36: 3:METHODOLIGIES To assess the irrig
Page 37 and 38: Figure 2 Sprinkler spacing ● Irri
Page 39 and 40: Figure 4 Zone numbering (Hunter ICC
Page 41 and 42: 4.1.2. Readily Available Water (RAW
Page 43 and 44: 4.1.6. Sprinkler Heads Each sprinkl
Page 45 and 46: Figure 5 Variation in Turf Coverage
Page 47 and 48: Table 1 Sprinkler Legend Zone / Spr
Page 49 and 50: Sprinkler not rotating 10.1 Toro 64
Page 51 and 52: Table 3 : Zone 6,7,10 Data Row Time
Page 53 and 54: Any misalignment should be adjusted
Page 55 and 56: 5: IRRIGATION SCHEDULING Irrigation
Page 57 and 58: 6: RECOMMENDATION FOR GROUNDS SYSTE
Page 59 and 60: 9: PLAN FOR ACTION 9.1 Limitations
Page 61 and 62: 10.1. 3: Management • Practice ir
Page 63 and 64: APPENDIX 2: Toro 640 sprinkler SPAC
Page 65 and 66:
Zone / Sprinkler Sprinkler Make Mod
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Brookvale Oval Investigation - Warringah Council - NSW Government

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