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American Fire Update: Containment Lines Strengthened


Update: 9:30 p.m. - American Fire Update: Containment Lines Strengthened

Weather conditions cooperated Saturday, allowing fire crews to strengthen the containment line on Mosquito Ridge Road on the eastern side of the American Fire. Containment stands at 67 percent, with full containment antipated for sometime near Sept. 1.
0824 American Fire Night Briefing
Night briefing of fire crews. (Photo courtesy USFS Inciweb)
Location: Placer County, CaliforniaDate of Fire Start: August 10, 2013 4:35 p.m
Cause: Under Investigation
Size: 23,729 acres
Containment: 67 percent
Management: California Interagency Incident Management Team 4Cooperating
Agencies: Placer County Sheriff’s Department, PlacerCounty, Placer County Water Agency, CHP, Foresthill School, ForesthillFire Department.
Fire Status: The south-west, west and north-west sides of the fireare in patrol status. Fire crews continued to improve and mop upinterior of containment lines on the north and north-east sides of thefire.
Weather conditions allowed crews to establish a back firingoperation utilizing a low intensity burn to strengthen the containmentline from the Mosquito Ridge Rd on the eastern side of the fire.The fire has been established in Antoine, Manila and ScrewaugerCanyons for several days.
The Barney Cavanah Ridge has firetravelling slowly along the ridge towards containment lines. Theseareas have no previous fire history and have not burned in more than 100 years.
Consumption is in heavy fuels which are producing singleand group tree torching with active smouldering and creeping in groundfuels. Crews have begun repairing areas damaged by firefightingactivity. Due to increased containment excessive personnel are beingreleased.
Resources: Total Personnel: 1,429 Hand Crews: 51 Engines: 78 Dozers: 19 Water Tenders: 38 Helicopters: 18
Structures Destroyed: 4 structures have been destroyed by the American Fire.Closure
Update: Mosquito Ridge Rd (FSR 96) is closed from thejunction of Ralston Ridge Rd (FSR 96-023) to the junction of theDuncan Diversion Dam access road (FSR 96-052), west of French MeadowsReservoir.
Foresthill Rd is closed from Humbug Canyon Road (FSR88-066) to Robinson Flat Campground and Forest Rd 43 (Robinson FlatRd) is closed from Robinson Flat Campground to Mosquito Ridge Rd.Robinson Flat Campground and Duncan Peak Lookout remain closed.
French Meadow Reservoir and access to the Oxbow Middle Fork AmericanRafting Launch put in remain open.Forest Order No 17-13-06 has closed portions of the Tahoe NF on theAmerican Ranger District.http://tinyurl.com/mvx4w3cFurther information: Information Call Center (530) 367-8020, staffed 7am to 8pm. www.fs.usda.gov/tahoe 
Follow the USFS on Twitter at https://twitter.com/Tahoe_NF 
Forsmoke information: www.placer.ca.gov/apcd

Basic Information

Incident Type Wildfire
Cause Under Investigation
Date of Origin Saturday August 10th, 2013 approx. 04:30 PM
Location 10 miles northeast of Foresthill.
Incident Commander Rocky Opliger

Current Situation

Total Personnel 1,429
Size 23,729 acres
Percent Contained 67%
Estimated Containment Date Sunday September 01st, 2013 approx. 12:00 AM
Fuels Involved

10 Timber (litter and understory).

Fire Behavior

The northeastern portion of the fire (DIV R,DIV T,DIV Z)remains active with moderate ratesof spread when in alighnment with wind and slope. Single and group tree torching observed along Cavanah Ridge and Deep Canyon. Backing fire from edge of firing operations continues to back into Deep Canyon at a slow rate of spread.

Significant Events

Continued significant fire growth in DIV Z and DIV R due to fire position and canyon alignment.Firing operations began in DIV T. Aggressive and safe mop-up in DIV A and DIV H.The Incident is also supporting Initial Attack requests over the TFR footprint.Field observers were able to determine a miners cabin was lost in the Lucky Bear/Secret Canyon mine area. A Type 2 helicopterwas loaned to the El Dorado National Forest in support of initial attack. A partial road closure of Mosquito Ridge Rd (Hwy 96)from the junction of Ralston Ridge Rd(Forest Rd 23)east to the junction of Forest Rd 96-052, west of French Meadows Reservoir for public and firefighter safety. Recreation opportunties remain open in French Meadows and surrounding recreational areas.


Growth Potential


Terrain Difficulty



Fire is burning in an old growth stand of timber with no recorded fire history.Significant changes in fuel types associated with the fire continue to burn in steep and hazardous terrain as well as receptive timber fuels that have not burned in decades.Consumption of heavy fuels continues to create heavy smoke in the surrounding area. The Forest, timber industry,local agencies, and private landowners continue to contribute to collaborate to implement strategy and tactics that will minimize impacts on high value timber resources, The Western States Trail, watershed, and local communities. Aerial ignition options are being reviewed for implementation. Critical resources remain ordered to maintain options to contain fire with the least resource damage that can be safely accomplished.

Current Weather

Wind Conditions 10 G mph SW
Temperature 78 degrees
Humidity 22%

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