storms november 2006 - western forest products 2006.pdf · storms 2006 znovember 15 – 226mm...
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Storms November 2006
Port Alberni Forest Operations
Storms 2006
November 6
– 222mm (9”) rain in 24 hours– Winds gusting to 33km / hour– Dry soils– First Event– 6 Landslides
Storm #1
Storms 2006
November 15
– 226mm (9”) rain in 24 hours– Winds gusting to 116km / hour– Saturated Soils– Compounding effect– 132 Landslides– Lost access to Nitnat & Bamfield– Lost access to most mainlines
Storm #2
Storms 2006
Slides normally occur when rainfall reaches 150mm over 24 hours.
– Nov 6 - 222mm / 24 hours
– Nov 15 - 226mm / 24 hours
HistoryHistory
Storms 2006
Guidelines state that shutdown occurs when the rainfall reaches 100mm over 24 hours.
– This provides time for crews to shutdown and arrive home safely before slides occur.
Rainfall Shutdown Rainfall Shutdown GuidelinesGuidelines
Storms 2006
Recent events have produced 25 -30mm of rain per hour
Given a travel time of 2 hours for many crews this will still allow the required time for crew safety.
Worker SafetyWorker Safety
Storms 2006
Priority given to community access routes.Repairs to Logging Operations & future access is still taking place & will be ongoing for the coming year.Patch repairs were done on structures where it was required to wait for summer fish windows.Hopefully will be eligible for some Forest Investment Account funding to assist with some of the natural slides.
Remedial WorksRemedial Works
Br. 167 Central Creek
From across the Valley
Br. 167 Central Creek
From a Distance
Miller Creek Drainage
Old 2nd Growth
Summit Main Washout
Venn Main Bridge
Camp B
Camp B
Cleanup
CarmanahMain
At Siding
Central North
25 km
Flora Washout
6.5 km
Venn Main
BCTS
Central Creek & Bamfield Main
Sarita Lake
KlanawaMain
31 km
Summit Road 40
Thompson Creek Area
Natural Gully Slide
Worthless Creek Main Bridge