Sayre Report - Hazard Mitigation Web Portal - State of California

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VIII. Treatments to Mitigate the Emergency Treatments for the burn area will be very difficult, if not impractical or unnecessary because of the topography, sparseness of urban development, and the fact that many of these conditions were pre-existing. Fire may introduce excessive amounts of slope erosion at locations adjacent to homes and roads. Erosion control BMPs such as fiber rolls or seeding need to be implemented only at critical locations. A. Treatment type(s) Erosion control Best Management Practices (BMPs) Reduce the imminent risk to homes and business B. Treatment objective (s) Reduce imminent risk to homes and business. Control erosion, and reduce debris and sediment generation C. Treatment description(s) Installation of silt fence, fiber rolls, debris barriers, construction of V- ditches along the upper slope of homes. Put gravel on the dozer lines to reduce the amount of soil washed away by run-off. IX. Recommendations A. General Recommendations: 1. Monitor debris flow and run-off, install early warning systems, and collect data for verification of existing hydrology model and for building of new post-fire hydrological models. 2. The existing road drainage systems should be inspected by the appropriate controlling agency to evaluate potential impacts from floods, hyper-concentrated floods, debris torrents, debris flows and sedimentation resulting from winter rains. VI References Los Angeles County Department of Public Works (LACDPW), 2006a., Hydrology Manual, Water Resources Division, January 2006. Alhambra, CA. 145 p. plus Appendices. http://ladpw.org/wrd/publication Robichaud, Peter R.; Elliot, William J.; Pierson, Fredrick B.; Hall, David E.; Moffet, Corey A. 2006. Erosion Risk Management Tool (ERMiT) Ver. 2006.01.18. [Online at .] Moscow, ID: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. .
DRAFT TECHNICAL SPECIALTIST’S Burned Area Recovery Team (BART) Resource: Soils Fire Name: Sayre Fire CA-LFD-1460 December 2008 Author Name: Robert Fastenau, Soils Scientist Department of Water Resources Glendale, CA 90123 Office (818) 500-1645 I. Resource Condition Assessment A. Resource Setting The Sayre Fire began on November 14 th 2008 and burned approximately 11,262 acres in Northern Los Angeles County along the San Gabriel Mountain Range. The predominantly wind-driven fire burned north of the Interstate-210 freeway in the vicinity of Sylmar area, was bounded by the Marek fire burn area to the East and the Sesnon Fire burn area to the West, across the Interstate-5. The fire was declared contained on November 21 st . The topography of the fire area is generally steep (70% of the fire area has slopes greater than 60%), with incised canyons which run in a general north-south pattern. Of the total area, about 50% (5,668) acres are on lands owned by the US Forest Service, administered by the Angeles National Forest. Of the remaining acres, about 3,000 acres (26%) occurred within the Direct Protection Area (DPA) of the State of California and the remaining 2,594 acres (24%) occurred within local jurisdictions (county and city). The areas evaluated are located in Loop, Wilson, Hog, Sombrero, Elsmere and Bee Canyons, as well as the area around the Pacoima Reservoir. The concentration of this assessment is the evaluation of the soils located in State and private lands. Potential features at risk from debris flows, mudslides and flooding identified by the Burn Area Recovery Team (BART) include: people, homes, water supplies, drainage crossings, roads, bridges and parks. All threat assessments included within this report that relate to flooding, debris flows and associated geologic instability are based upon a five-year storm event producing 4.1 to 4.7 inches of rain within a 24 hour period. It is important to remember this when evaluating the predictions contained within this report. B. Survey Methods The hydrology, geology and soils team evaluated the values at risk by conducting soil hydrophobicity tests, slope measurements and estimating vegetation loss in
Page 1 and 2: Sayre Fire Burned Area Recovery Tea
Page 3 and 4: Appendix 7 Values at Risk Site Map-
Page 5 and 6: Protection Area (DPA), and 2,594 ac
Page 7 and 8: B. Threats to Wildlife and Botanica
Page 9 and 10: All VARs identified during the Scop
Page 11 and 12: Sayre Fire Contact List Katie VinZa
Page 13 and 14: DRAFT TECHNICAL SPECIALIST’S SUMM
Page 15 and 16: works at Pacoima dam may be clogged
Page 17 and 18: Evaluations of the Los Angeles Coun
Page 19 and 20: Botanical resource emergencies fall
Page 21 and 22: DRAFT TECHNICAL SPECIALTIST’S Bur
Page 23 and 24: All threat assessments included wit
Page 25 and 26: the Marek Fire on the eastern side
Page 27 and 28: 4. Property owners located below th
Page 31 and 32: VI. Findings of the On-The-Ground S
Page 33: a total of 682 acres burned by thes
Page 37 and 38: Figure 2. II. Findings of the On-Th
Page 39 and 40: to prevent erosion at high value si
Page 43 and 44: III. Emergency Determinations The a
Page 45 and 46: 2. Performing a literature review o
Page 47 and 48: • A detailed structural inspectio
Page 49 and 50: Around the Olive View Hospital and
Page 51 and 52: • Trees that were already declini
Page 53 and 54: Specific Recommendations Any hazard
Page 55 and 56: VI. References California Native Pl
Page 57 and 58: perimeter on the eastern side but d
Page 59 and 60: In general, burn patterns were low
Page 61 and 62: The western spadefoot toad is a sta
Page 63 and 64: • Conduct long-term bird monitori
Page 65 and 66: Penrod, K., C. Cabanero, P. Beier,
Page 67 and 68: Rare plant and natural community lo
Page 69 and 70: sprouting shrubs may be repeatedly
Page 71 and 72: lands is the coast live oak woodlan
Page 73 and 74: • Preserve natural stream bottoms
Page 75 and 76: • Avoid livestock grazing in burn
Page 77 and 78: Figure 3 Dozer lines along Santa Cl
Page 79 and 80: Photos of Vernal Pools in O’Melve
Page 81 and 82: 7. Hog Basin 8. Yarnel Basin 9. Sad
Page 83 and 84: The hospital has several areas that
Page 85 and 86:
California Geological Survey Burn S
Page 96 and 97:
Appendix 11 Wildlife Corridor Map
Page 98 and 99:
Appendix 13. CNDDB List of Californ
Page 100 and 101:
Table - 3: Peak Flows Increase for
Page 102 and 103:
Table 5. Values potentially at risk
Page 104 and 105:
Table 8: Rare, Threatened, and Enda
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Sayre Report - Hazard Mitigation Web Portal - State of California

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