Sayre Report - Hazard Mitigation Web Portal - State of California

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Special Acknowledgment The Sayre BART would like to extend a special acknowledgment to the Courtyard by Marriott Santa Clarita hotel for their assistance in providing State Rate rooms for the team members. Also, for extending their hospitality to include the use of a meeting room everyday for the team to meet to discuss the daily issues that arise during field investigations and report writing.
DRAFT TECHNICAL SPECIALIST’S SUMMARY Burn Area Recovery Team (BART) Engineering Geology The scope of the assessment and the information contained in this report should not be construed to be either comprehensive or conclusive, or to address all possible impacts that might be ascribed to the fire effect. Post fire effects in each area are unique and subject to a variety of physical and climatic factors which cannot be accurately predicted. The information in this report was developed from cursory field examination by licensed resource professionals and should be viewed in conjunction with other relevant sources of information. Neither the State of California nor any Agency or Department participating as a member of the Burn Area Response Team (BART) makes any warranty, express or implied, nor assume any legal liability for the information disclosed herein. The most significant near term geologic threat to the burn area is an increased potential risk from rock falls, debris flows and mud torrents flowing down the slopes and canyon bottoms as a result of locally intense or seasonally sustained rain fall on the preexisting slope failures and fire denuded hillsides. Of the thirty four (34) at-risk sites identified by the BART survey, only 2 sites (Pacoima Dam office building and reservoir) were found at to be at potential geologic risk from rock fall and landslides, and 26 sites (primarily the Dam reservoir and other Debris Basins) from debris flow or mud torrent flood inundation. The remaining sites were evaluated to not have a significant geologic impact from the fire to the observed risk potential. The Pacoima Dam Office is situated near the toe of a steep rock slope and is already subject to a significant rock fall hazard. The rock fall hazard potential has been substantially increased due to the Sayre Fire from the denuding of the slope and thermal effects of the fire on the exposed rock face. Recent rock fall and dry ravel debris on the slopes and behind the walls, along with burnt timber lagging of several walls, and damage to the masonry wall were observed during the BART reconnaissance of the site. The Pacoima Dam reservoir pond is also already subject to significant rock fall and landslide hazards from the adjacent slope areas. This potential risk has become increased due to both the Sayre Fire on the western side and the Marek Fire on the eastern side of the reservoir due to the denuding of the slopes and an increased susceptibility of soil or rock movement due to rainfall events.
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: Sayre Fire Contact List Katie VinZa
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 and 34: 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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