storms november 2006 - western forest products 2006.pdf · storms 2006 znovember 15 – 226mm...

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