SUNRISE POWERLINK ALPINE CONSTRUCTION SUMMARY: April 23, 2012

SUNRISE POWERLINK ALPINE CONSTRUCTION SUMMARY: April 23, 2012

All transmission line construction activity on Alpine Boulevard has been completed. Construction activities for the County of San Diego’s Streetscape Improvement Plan and 20A utility undergrounding effort are continuing.

On March 26, the Alpine Community Planning Board voted to support the County of San Diego’s Phase II Streetscape plans. This work includes expediting the County’s storm drain design and placing 17 inch storm drains along Alpine Boulevard.
Per SDG&E’s original agreement with the County of San Diego and its commitment to the community, SDG&E will pave with rubberized asphalt west of Tavern Road and East of South Grade Road as scheduled within the next several months. However, at the County of San Diego’s request, rubberized asphalt paving in the downtown area will be delayed until the County completes its storm drain work.

As of April 16, SDG&E has completed all 40 vaults, transmission line trenching, and cable installation and splicing on Alpine Boulevard. Overall construction on the Alpine underground segment is more than 95 percent complete.

Outlook for week of April 23-28: Working on San Diego County’s streetscape improvements west of South Grade Road and east and west of West Victoria, Monday-Friday. Working on the 20A utility undergrounding effort east and west of South Grade Road, Monday-Friday.

Outlook for week of April 30- May 5: Working on San Diego County’s streetscape improvements west of South Grade Road and east and west of West Victoria, Monday-Friday. Working on the 20A utility undergrounding effort east and west of South Grade Road, Monday-Friday.

All construction activities listed above are taking place along Alpine Boulevard. Cross streets are provided as a reference only. Construction is taking place from 7 AM to 5 PM.

The information provided above is a general overview of potential construction activities for the weeks of April 23-28 and April 30- May 5. Business requests, weather conditions and other considerations will be taken into account when determining daily work assignments. Construction schedules are subject to change without notice.

SUNRISE POWERLINK CONSTRUCTION SUMMARY

OVERHEAD TRANSMISSION LINE AND SUBSTATIONS

April 23, 2012

Overhead construction activity in San Diego and Imperial Counties continues on several tracks, including installing tower foundations, completing steel lattice towers, stringing wire and constructing and improving access roads. SDG&E also is developing the new Suncrest Substation, and upgrading existing substations and other facilities to accommodate increased power from the new line.

As of April 23, SDG&E has completed 436 tower foundations and 348 overhead structures. More than 75 miles of conductor has been strung. Construction of the new Suncrest Substation east of Alpine is 100 percent complete.

Outlook for week of April 23-28

Link 1*: Conducting road activities and improvements in the McCain Valley and Jacumba, Monday-Saturday. Preparing tower sites and installing foundations in Jacumba, Monday-Saturday. Assembling and installing lattice towers in the McCain Valley, Monday-Saturday. Conducting wire stringing activities in the Mc Cain Valley, Monday-Saturday.
Link 2*: Conducting road improvements just east of the Suncrest Substation, in the Barrett Canyon and Bartlett Hauser Creek areas, Monday-Saturday. Installing tower foundations just east of the Suncrest Substation as well as in the Barrett Canyon, Bartlett Hauser Creek areas, Monday-Saturday. Assembling and installing lattice towers just east of the Suncrest Substation and in the Barrett Canyon and Bartlett Hauser Creek areas, Monday-Saturday. Conducting wire stringing activities just east of the Suncrest Substation and in the Bartlett Hauser Creek area, Monday-Saturday.
Link 3: (Suncrest Substation): Landscaping, warehouse construction and cleanup, Monday-Saturday.
Link 5*: Conducting road improvements in the Sycamore Canyon and just east of Alpine, Monday-Saturday. Putting finishing touches on lattice towers in Sycamore Canyon and just east of Alpine, Monday-Saturday. Conducting wire stringing activities in the San Vicente area and just west of El Monte, Monday-Saturday.

Outlook for week of April 30- May 5

Link 1*: Conducting road activities and improvements in the McCain Valley and Jacumba, Monday-Saturday. Preparing tower sites and installing foundations in Jacumba, Monday-Saturday. Assembling and installing lattice towers in the McCain Valley, Monday-Saturday. Conducting wire stringing activities in the Mc Cain Valley, Monday-Saturday.
Link 2*: Conducting road improvements just east of the Suncrest Substation, in the Barrett Canyon and Bartlett Hauser Creek areas, Monday-Saturday. Installing tower foundations just east of the Suncrest Substation as well as in the Barrett Canyon, Bartlett Hauser Creek areas, Monday-Saturday. Assembling and installing lattice towers just east of the Suncrest Substation and in the Barrett Canyon and Bartlett Hauser Creek areas, Monday-Saturday. Conducting wire stringing activities just east of the Suncrest Substation and in the Bartlett Hauser Creek area, Monday-Saturday.
Link 3: (Suncrest Substation): Landscaping, warehouse construction and cleanup, Monday-Saturday.
Link 5*: Conducting road improvements in the Sycamore Canyon and just east of Alpine, Monday-Saturday. Putting finishing touches on lattice towers in Sycamore Canyon and just east of Alpine, Monday-Saturday. Conducting wire stringing activities in the San Vicente area and just west of El Monte, Monday-Saturday.

In order to bolster construction activities and ensure the project is completed as quickly as possible, SDG&E requested and received approval from the County of San Diego to work on certain Sundays in some work locations between February 26 and May 28. The Sunday work will occur between the hours of 7 a.m. and 7 p.m. in three segments along the Sunrise Powerlink route. Each construction location may require work for several Sundays, but by no means will encompass every Sunday outlined in the County’s Noise Variance decision.

The Sunday work is necessary for several reasons, including completing construction activities near or in recreational areas such as the Cleveland National Forest. The Sunday work will allow construction to be completed as quickly as possible in these areas during low-use winter months and avoid any impacts during peak use summer months. In addition, the Sunday work will minimize the impacts of potential electric service interruptions related to construction; and provide the extra time needed to complete sections of the project before the height of bird nesting season this spring. SDG&E is required to minimize construction activities around active bird nests during this time.

There are also three highway crossing locations where work may take place from sunrise to 10:00 a.m. Caltrans encroachment permits for the construction work at these highway crossings requires that construction operations within state highways take place only on Sunday mornings.

The Sunday work will allow construction in these areas during low-use winter months and avoid any impacts during peak use summer months and before the height of bird nesting season this spring.

The information provided above is a general overview of potential construction activities for the weeks of April 16-21 and April 23-28. Community requests, weather conditions and other considerations will be taken into account when determining daily work assignments. Construction schedules are subject to change without notice.

*Link definitions: Link 1 starts at the Imperial Valley Substation and runs west near the communities of Jacumba and Boulevard to the boundary of the Cleveland National Forest (CNF). Link 2 continues west through CNF and north of Campo until it reaches Link 3, which is the site of the new Suncrest Substation east of Alpine. Link 4 is the 6.2 mile underground segment along Alpine Boulevard (see separate weekly update). Link 5 consists of two segments of 230kV overhead transmission line on either side of the Alpine underground segment, one that runs from the Suncrest Substation to Alpine and the other that starts west of Alpine and runs to the Sycamore Canyon Substation – where the project connects to the existing SDG&E system.