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Adopted March 2023. Supersedes all older Matrices and all other Safety Rules.
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There is no moving from Zone to Zone in either daylight or in darkness (see APPENDIX #1).
Based on conditions, select the more restrictive of flow and water temperature (further zone to right).
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Rowing Zones:
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Zone 1Zone 2Zone 3Zone 4Zone 5
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Water Flow
(See APPENDIX #2)		Below 29.9k cfs30-39.9k cfs40-44.9k cfs45-49.9k cfs50-60k cfs
DAYLIGHT ONLY
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Water Temperature50.0⁰ and AboveBelow 50.0⁰
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Shell TypeAll boatsRacing Shells: All types
Adaptive Shells: All boats		 8+, 4+, 4X 8+, 4+, 4X 8+, 4X
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(2x allowed only if flow is under 40k cfs)
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Launch to Shell Ratio
Not Required
(See Youth (U-19) Exception APPENDIX #5)		One launch for 3 shellsOne launch for 2 shellsOne launch per shellOne launch per shell and sufficient launches to:
(a) carry all rowers and coxes participating in the session
(b) have at least 2 engines
between all launches on the water (towing line required)
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RacingRacing AllowedNo Racing Allowed
(See APPENDIX #6)
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Coach CertificationALL ZONES, TRRA - Equivalent Certification
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PFD Requirement by GroupRowersNot RequiredRecommended to be worn or in shell for 1x, 2x, 2-Recommended to be worn or in shell for all rowersZone 4 & 5 - required to be worn by all rowers when water is under 50 degrees. Recommended to be worn or in shell at all other times (see APPENDIX #7)
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CoxswainsALL ZONES - Required to be worn from November 1 through April 30.
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Coaches & All Launch OccupantsALL ZONES - PFD to be worn at all times.
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Zone Based Criteria
(*See APPENDIX #9)		U-14: Approved
Novice: Approved
Experienced: Approved
Adaptive: Approved		U-14: Restricted
Novice: Approved
Experienced: Approved
Adaptive: Approved		U-14: Restricted
Novice: Limited*.
Experienced: Approved
Adaptive: Inclusion		U-14: Restricted
Novice: Limited*
Experienced: Approved
Adaptive: Inclusion		U-14: Restricted
Novice: Limited*
Experienced: Approved
Adaptive: Inclusion
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Communication RequirementA whistle is REQUIRED and protected cell phone recommended in each launch or in each shell not accompanied by a launchZone 2, 3 & 4 - Protected cell phone and whistle is REQUIRED in each launch and recommended in each shell.
Protected cell phone required in each launch and shell. Marine radio recommended for coaches. At least one additional person must be on shore with cell phone and car (See APPENDIX #8)
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Three Rivers Rowing Association Safety Matrix Appendices
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NumberTopicNotes & DetailLink
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1Daylight:The hours between sunrise and sunset per the times specified.Link
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2Water Flow:Use more recent OBSERVED DATA regardless of the time and dateLink
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3Water Temperature:Use the Water Temperature Table:Link
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4Launch Safety Items:The following must be included in each launch under all conditions:
- One space blanket per rower
- Bailer
- Pump (in rough water, one pump recommended in each shell)
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5Youth (U-18) Exception:All youth (Under age 18 and/or still enrolled at a high school) shells must be accompanied by a launch at ALL times and in ALL conditions.
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6Racing:Racing is allowed with the water temperature is below 50-degrees AND the flow is below 40 Kcfs. All other safety conditions for Zones 3, 4, and 5 apply to races when water temperature is below 50-degrees.
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7Life Jackets:A: The Safety Committee cautions that certain PFD manufacturers do not recommend the use of CO@ inflatable PFDs in air or water temperature below 40-degrees Fahrenheit.
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B: It is recommended that coxswains wear a low profile (vest or belt pack) at all times and in all zones.
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8Additional Zone 5 Requirements:A: A meeting and letter must be provided to TRRA before any program rows in Zone 5Zone 5 Letter Template
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B: Crews must be strong enough to row upstream through the top of the channel with only ¾ of rowers rowing.
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C: Crews must have no less than 2 hours of on-water time during the immediately preceding 5-day period.
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D: Rowing in Zone 5 may only occur during daylight as defined in APPENDIX #1.
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E: Rowing in Zone 5 is prohibited in the face of visible whitecaps.
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F: For youth (U-19) organizations, a parent group safety representative must attend each TRRA Safety Meeting.
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9Zone Based Criteria
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Zone 1Zone 2Zone 3Zone 4Zone 5
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AdaptiveXXPR 3 - Inclusion (Crew contains at least 50% able bodied athletes.)
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U-14XRestricted
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Novice
(Age 14+)		XXNovice rowers & coxswains must have no less than 40 hours of on-the-water rowing in the immediately preceding 6 months OR the crew (8’s only) can contain no more than half novices.No novice rowers or coxswains unless the crew (8’s only) contains no more than half novices AND each novice has no less than 60 hours on-the-water rowing in the immediately preceding 6 months AND no less than 8 hours of on-the-water-rowing in the immediately preceding 2 weeks.No novice rowers or coxswains unless the crew (8’s only) contains no more than half novices and each novice has no less than 90 hours on-the-water rowing in the immediately preceding 5 months AND no less than 16 hours of on-the-water-rowing in the immediately preceding 2 weeks AND the water is over 50 degrees
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ExperiencedXXXXAll crews and programs must meet all of the criteria outlined in Appendix 8 before rowing in Zone 5
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