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Building Prothro Football Practice Fields
- 1. Building Prothro Football Practice Fields Tom Cook Oregon State University
- 2. Design Group Cameron, McCarthy, Gilbert, & Scheibe Landscape Architects LLP Eugene, OR Contractor Bernhardt Golf Construction Darryl Bernhardt, Bob Short & Crew Portland, OR OSU liaison Greg Goracke OSU Intercollegiate Athletics
- 3. Design Features 1. Excavate existing field 2. Grade subgrade to 1.5% slope 3. Head-head multizoned irrigation, Hunter heads 4. Drains 15 ft on center, 8” mains, 4” laterals 5. Trenches lined with geotextile fabric 6. 90-10 sand/organic topmix approx. 12” depth 7. Sand grown perennial ryegrass sod 8. Fixed goals at south end of field Scheduled start date April 1, 2003 Scheduled finish date July 9, 2003
- 4. Staging area set up at east end of existing fields
- 5. Stockpiling soil for removal
- 7. Irrigation lines trenched 2 ft deep into subgrade so drainlines could be installed above irrigation lines
- 9. Main drainline at south end of field
- 10. Double walled corrugated pipe
- 11. Drain lines trenched to a constant depth
- 12. Spreading trench spoils away from trench
- 13. Packing down trench spoils after spreading
- 15. Connecting 20 ft drain sections prior to installation
- 16. Packing bottom of trench prior to drain placement
- 18. Unprotected drain 8 yrs after construction
- 19. Laying geotextile fabric on trench prior to placing pipes
- 20. Backfilling drains with gravel
- 22. Connecting laterals to main drain
- 23. Herringbone pattern on 15ft centers
- 24. Stockpiling sand + organic topmix from Fazio Bros.
- 29. Spreading topmix in preparation for final grading
- 31. Watering to firm surface for grading
- 32. Laser Grading to produce flat surface
- 33. Laser beacon Finish grade slope is 1.5% from north to south
- 34. Rootzone depth approximately 12”
- 35. Float and roller to smooth for finish grade
- 36. Ryegrass from Bos Sod Co. in British Columbia
- 38. Cleanup drag just prior to laying sod
- 39. Positioning sod to get tight fitting seams
- 41. Sodding finished by July 3, 2003
- 42. Jess Lewis, Field mgr.
- 43. Root depth 3 wks after sodding
- 44. Two-a-day practices started about 5 wks after sodding
- 45. Turf appearance after 2 wks of preseason practice
- 46. How did it turn out? 1.Fixed goals = conc. wear at south end 2.Worn areas lost stability 3.Turf recovered well after season started 4.Need to rotate drill locations more