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Fall Zone – TRTP Project

Fall Zone – TRTP Project. Segment 8A Corridor September 19, 2011. Fall Zone.

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Fall Zone – TRTP Project

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  1. Fall Zone – TRTP Project Segment 8A Corridor September 19, 2011

  2. Fall Zone Earthquake-Induced Landslides. The topography along Segment 8A in the Puente and Chino Hills is locally steep and is likely to experience landsliding or slope failures due to earthquakes. Historic earthquake induced ground and slope failures are known to have occurred in the mountains and hills of southern California. Moderate to steep slopes throughout the Puente and Chino Hills could experience slope failures in areas with over-steepened slopes or with bedding planes oriented in the downslope direction. 3.7 GEOLOGY, SOILS, AND PALEONTOLOGY Tehachapi Renewable Transmission Project Page 3.7-37 http://www.chinohills.org/archives/48/PR09-132%20CPUC%20Releases%20Final%20EIR%20and%20ALJ%20Releases%20Proposed%20Decision%20for%20TRTP.pdf

  3. Fall Zone Due to the nature and characteristic of the steel poles if it were to fall, the fall zone will likely be within the diameter of the height of the pole. Contrast to a lattice tower, if a lattice tower were to fall it would collapse within itself as oppose to falling within it’s radius. The brief presentation describes the fall zone of the TRTP project within a populated area. Collapse of lattice tower tend to fall within a narrow range. Note how poles fall within their diameter of the height of the pole.

  4. Fall Radius Between Lobelia and Pipeline Pole ID R3221 Pole ID PMT 195

  5. Pole ID PMT195 There are 6 homes within the pole fall zone There are 18 homes within the cable fall zone Closest property within 71 feet of the pole

  6. Pole ID PMT195 Note: Size of the pole There are 9 homes within the pole fall zone There are 28 homes within the cable fall zone Closest property within 69 feet of the pole

  7. Fall Radius Between Peyton and Cork Pole ID 195RA

  8. Pole ID 195RA Note: Dimensions of the screws Note: Graffiti on the pole There are 9 homes within the pole fall zone There are 25 homes within the cable fall zone Closest property within 71 feet of the pole

  9. Fall Radius Between Morningfield Dr and Peyton Dr Pole ID TBD Pole ID PMT190

  10. Lattice tower ID (TBD), adjacent to Peyton City Hall Ayala High Chino Valley Community church located on the left. There is 1 home within the pole fall zone There are 21 homes within the cable fall zone Closest property within 180 feet of the pole Chino Valley Community Church within 100 feet of 500KV line Loving Savior Lutheran School and Church within 500 feet of a 500KV line Due to the topography this lattice tower will be nearly 300 feet tall when viewed from Peyton Ayala HS within 1,450 feet and Little Elementary within 1,100 feet of a 500 KV line LDS Church within 1,000 feet and Catholic Church 3,050 feet of 500KV line City Hall within 3,500 feet 500 KV line

  11. Pole ID PMT190 Tower original right of way design for, 100 foot towers Zoom 40 foot pole Note: Size of the pole and proximity to the property There are 10 homes within the pole fall zone There are 34 homes within the cable fall zone Closest property within 71 feet of the pole

  12. Fall Radius Between Crossroads Park and Maplewood Dr Pole ID PTM195 Pole ID PTM185

  13. Pole ID PMT195 Lattice tower View facing east, note the lattice tower on the right that the right of way was meant for Due to the topography this pole viewed from Chino Hills Parkway will have a height of 250 feet. There are 5 home within the pole fall zone There are 21 homes within the cable fall zone Closest property within 72 feet of the pole

  14. Pole ID PMT185 Original Lattice tower Compare to the original tower View from Crossroad Parks Crossroads park is within the pole fall zone Height of pole as viewed from Chino Hills Parkway and Carbon Canyon is in excess of 275 feet

  15. Fall Radius Coral Ridge Park and Crossroads Park Pole West of Crossroad Park Pole ID PTM195

  16. Pole ID PMT190 through Pole west of Crossroad Park Original Lattice tower Compare new pole to the original towers Note the children and adult by the pole There are 19 homes within the pole fall zone There are 51 homes within the cable fall zone Closest home within 71 feet of the pole Height of pole as viewed from Chino Hills Parkway 300 feet due to topography

  17. Fall Radius at Coral Ridge Park Corral Ridge Pole

  18. Corral Ridge Pole Pole within Corral Ridge Park There are 51 homes within the cable fall zone Kids at play at Corral Ridge Park

  19. SUMMARY Total Houses Within Fall Zone = 110 Total Houses Within Cable Fall Zone = 198 Number of Directly Impacted Homes = 308 Average Home Distance From Poles = 71 FT

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