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Update on Hetch Hetchy Prescribed Fire

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avatar Prescribed Fire Scheduled in Yosemite National Park Burn Scheduled for Hetch Hetchy Area
March 06, 2014 03:39PM
Burn Scheduled for Hetch Hetchy Area

Yosemite National Park is planning a prescribed fire in the Hetch Hetchy area, near the O’Shaughnessy Dam. The fire is planned for mid to late March and will include a total of 57 acres. Ignition and active burning will take approximately one to two days and a few additional days to patrol and monitor until the end of the burn.

Due to recent precipitation in the area in the last several weeks, including the unsettled weather forecast for the next several days, fire managers will monitor the area and ignite the planned prescribed burn when prescription parameters are at optimum levels.

This year, March is the ideal timeframe for prescribed fire due to minimal snowpack and rain. Typically, fuels and vegetation would be too wet to burn this time of the year. However, the current drought makes this March an ideal burning season. Additionally, the burn area is surrounded by the Hetch Hetchy Road and previously burned areas that were affected by the Rim Fire.

The primary objective of the prescribed fire is to treat vegetation and fuels around the buildings and other infrastructure of the O’Shaughnessy Dam. The burn unit is located near the Hetch Hetchy Road and will protect infrastructure at Hetch Hetchy from potential wildfires. Additionally, this prescribed fire is designed to reduce surface and “ladder fuels” that allow ground fire to leap to the tree canopy and cause crown fires. Once treated and maintained, this unit will offer a “fuel break” for firefighters to safely protect structures at the O’Shaughnessy Dam.

Since 1930, multiple lightning ignitions have been suppressed in the area, indicating that wildfire does present risk to the developments at Hetch Hetchy. The area surrounding the unit previously burned with low to moderate intensity during the 2013 Rim Fire and multiple lightning fires have been managed nearby for resource objectives in recent years.

A smoke management plan has been submitted to the Tuolumne County Air Pollution Control District (APCD) and a burn permit will be issued. Only localized smoke impacts to the Hetch Hetchy Road and O’Shaughnessy are anticipated. The exact date of the burn will be determined in collaboration with the APCDs to find optimal weather to disperse smoke away from populated areas. At the discretion of the APCDs, smoke monitors may be deployed in smoke sensitive communities to monitor air quality. Mariposa and San Joaquin County APCDs have been notified of the burn as well.

The Hetch Hetchy Road will remain open during the burn; however traffic control will be necessary during roadside operations. Visitors to the area are urged to drive with caution as firefighters, fire equipment, smoke and debris may be present on the roadway. The Hetch Hetchy campground will close for one to two days during the operation. However, the Hodgdon Meadow Campground, which is on a first-come, first-served basis, will remain open during the burn.

Fire crews from Yosemite National Park, other national parks, and the U.S. Forest Service, will be present during all burn activity.
Do you think they will have many after last years Rim Fire?
avatar Re: Prescribed Fire Scheduled in Yosemite National Park Burn Scheduled for Hetch Hetchy Area
March 06, 2014 05:02PM
That's what I was thinking; burn what?
avatar Re: Prescribed Fire Scheduled in Yosemite National Park Burn Scheduled for Hetch Hetchy Area
March 06, 2014 07:33PM
Having extensively toured that area, the first (snarky) thought that crossed my mind is "I guess they are going for a more uniformed look; flatten some of those pesky holdout enclaves"

The body betrays and the weather conspires, hopefully, not on the same day.
When I was there in November...it looked like the fire shot up the ridge from somewhere behind the various buildings. So, there's actually quite a bit of burnables immediately around the buildings.
avatar Re: Prescribed Fire Scheduled in Yosemite National Park Burn Scheduled for Hetch Hetchy Area
March 06, 2014 09:07PM
That's probably from all the work they did to save those buildings. Probably could use some burning. The last time I was there I counted almost a dozen non native plants right around the entrance kiosk.
avatar Update on Hetch Hetchy Prescribed Fire
March 26, 2014 10:48AM
Fire personnel have completed ignition on the Hetch Hetchy unit for a total of 55 acres burned. Fire resources will continue mop up and patrol. Assessment of the campground will take place after the predicted precipitation on Wednesday.
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