Apple Fire – 7/31/2020 El Dorado - 9/05/2020

• What to expect this winter

• Overview of studies and areas of concern

• Private property mitigation Post Fire Effects

• Rainfall runoff can be 2 to 5 times higher than normal, particularly during small storms

• Significant load of burnt vegetation, ash, rock and mud flowing out of the canyons during intense storms.

• Ash, burnt smell from first storms of the year

• Slopes subject to erosion, failure

• Rockfall from steep slopes

• Extended road closures, loss of utilities Debris Flow vs. Mud Flow

Montecito It’s all about rainfall intensity – not total rainfall Can be triggered by rainfall of 0.5” per hour or more of rainfall Rainfall only has to occur for 15 minutes Takes 3-5 years for canyon slopes to stabilize/recover • NOAA predicting drier than normal winter

• HOWEVER, we still expect some winter storms

• Ordinary storms are capable of triggering mud and debris flows

Corona 1 aftermath Jan 2018 • What to expect this winter

• Overview of studies and areas of concern

• Private property mitigation

Watershed Emergency Response Team Apple/ Report

Report Pending

www.rivcoready.org/stormready

Mias Canyon

Mias Canyon Smith Creek

Smith Creek

Smith A

Smith B Smith Creek

Smith Creek

Smith A

Smith B Smith Creek

Smith Creek

Smith A

Smith B Marshal Creek Marshal Creek

Marshal A

Marshal D Marshal C Marshal Marshal B

Marshal E Marshal F Marshal 2016 Bogart Fire

December 2016 Mud Flow Marshal Creek Marshal Creek

Marshal A

Marshal D Marshal C Marshal Marshal B

Marshal E Marshal F Marshal Little San Gorgonio Noble Creek Creek and Noble Creek Little San Gorgonio

Noble I Creek Noble F Noble Noble A Noble

Noble J Noble G Noble Noble C Noble Noble H Noble Noble D Noble Noble B Noble Noble Creek and Little San Gorgonio Creek Noble A Noble Noble F Noble

Noble J Noble G Noble Noble C Noble Noble D Noble Noble H Noble Noble B Noble Noble Creek and Little San Gorgonio Creek Noble Creek and Little San Gorgonio Creek Noble A Noble Noble F Noble

Noble J Noble G Noble Noble C Noble Noble D Noble Noble H Noble Noble B Noble Noble Creek and Little San Gorgonio Creek Noble A Noble Noble F Noble

Noble J Noble G Noble Noble C Noble Noble D Noble Noble H Noble Noble B Noble Noble Creek and Little San Gorgonio Creek

Noble J Noble H Noble Noble B Noble Noble Creek • Adding Pier and Noses to Bridge • Excavator during Little San storms to clear Gorgonio debris • K-rail to direct Creek overflow back Noble A Noble into channel

Noble J Noble G Noble Noble C Noble Noble D Noble Noble H Noble Noble B Noble Noble Creek and Little San Gorgonio Creek Noble F Noble A Noble Noble Creek and Little San Gorgonio Creek Noble A Noble Noble F Noble

Noble J Noble G Noble Noble C Noble Noble D Noble Noble H Noble Noble B Noble Noble Creek and Little San Gorgonio Creek

Noble J Noble H Noble • What to expect this winter

• Overview of studies and areas of concern

• Private property mitigation Before the Storm • Store outdoor furniture and other objects that could be damaged by storms, thrown by winds, or carried away by water.

• Cut down weakened trees that could damage your home.

• Take care of grading or drainage needs on your property.

• Inspect retaining wall drain holes, surface and subsurface drains and yard drains for signs of obstruction or malfunction.

• Establish native plants or place other ground cover on bare ground, slopes or freshly graded areas. Contact the Natural Resource Conservation Service for assistance - 909.283.7793 (Redlands Office) www.rivcoready.org/stormready

• BAER Report

• CalFire WERT Report

• Homeowners Guide

• Risk and Evacuation Maps

• AlertRivco Sign-Up

• Other Current Information Information for Homeowners if Subject to Flooding

Standard homeowner policies do not cover flood damage!

Purchase Flood Insurance offered by the National Flood Insurance Program (Policy takes 30 days to activate) Call your insurance agent or 1-877-336-2627 for agent referals www.floodsmart.gov/find www.rivcoready.org/stormready