building prothro football practice fields
TRANSCRIPT
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Building Prothro Football Practice Fields
Tom CookOregon State University
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Cameron, McCarthy, Gilbert, & ScheibeLandscape Architects LLPEugene, OR
Bernhardt Golf ConstructionDarryl Bernhardt, Bob Short & CrewPortland, OR
Greg GorackeOSU Intercollegiate Athletics
Design Group
Contractor
OSU liaison
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Design Features
1.Excavate existing field 2.Grade subgrade to 1.5% slope3.Head-head multizoned irrigation, Hunter heads4.Drains 15 ft on center, 8” mains, 4” laterals5.Trenches lined with geotextile fabric6.90-10 sand/organic topmix approx. 12” depth7.Sand grown perennial ryegrass sod8.Fixed goals at south end of field
Scheduled start date April 1, 2003Scheduled finish date July 9, 2003
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Staging area set up at east end of existing fields
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Stockpiling soil for removal
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Irrigation lines trenched 2 ft deep into subgradeso drainlines could be installed above irrigation lines
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Main drainline at south end of field
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Double walled corrugated pipe
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Drain lines trenched to a constant depth
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Spreading trench spoils away from trench
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Packing down trench spoils after spreading
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Connecting 20 ft drain sections prior to installation
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Packing bottom of trench prior to drain placement
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Unprotected drain 8 yrs after construction
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Laying geotextile fabric on trench prior to placing pipes
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Backfilling drains with gravel
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Connecting laterals to main drain
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Herringbone pattern on 15ft centers
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Stockpiling sand + organic topmix from Fazio Bros.
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Spreading topmix in preparation for final grading
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Watering to firm surface for grading
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Laser Grading to produce flat surface
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Finish grade slope is 1.5% from north to south
Laser beacon
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Rootzone depth approximately 12”
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Float and roller to smooth for finish grade
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Ryegrass from Bos Sod Co. in British Columbia
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Cleanup drag just prior to laying sod
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Positioning sod to get tight fitting seams
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Sodding finished by July 3, 2003
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Jess Lewis, Field mgr.
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Root depth 3 wks after sodding
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Two-a-day practices started about 5 wks after sodding
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Turf appearanceafter 2 wksof preseason practice
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How did it turn out?
1.Fixed goals = conc. wear at south end2.Worn areas lost stability3.Turf recovered well after season started4.Need to rotate drill locations more