August 2, 2017

Overhead Transmission Line Construction
Emerges as Preferred Solution


Cape Hatteras Electric Cooperative and contract crews have simultaneously pursued two options for restoring permanent transmission service to Hatteras and Ocracoke Islands, waiting for one solution to emerge as the fastest, safest way to restore reliable transmission service. That determination has been reached.

Overhead Solution: Constructing a new overhead transmission line from its underground point at the south end of the Bonner Bridge to the point where it meets the cooperative’s existing overhead transmission line is the most expedient way to restore transmission service to the islands. CHEC reached this determination in consultation with specialty contract crews including Lee Electrical Construction, an organization that specializes in high-voltage transmission line construction, and New River Electrical, which specializes in the highly complex processes of splicing and transitioning lines from underground to overhead.

Overhead Progress: Crews began installing the three-phase line last night. Concurrently, the specialist team from New River Electrical is executing prep work for creating the transition from underground to overhead just before the site of the damage and creating connections to the existing overhead lines that run the length of Hatteras Island.

Underground Situation: Despite PCL Construction’s tireless excavation efforts and attempts to dewater the trench at the site of the damage, trench conditions proved to be too challenging for the underground solution to be viable. PCL Construction was able to reveal all three cables, but water continued to seep into the trench making the environment unsuitable for repairs.

Timeframe: The restoration timeframe from this point forward is 3-5 days. This includes the time required for testing after all construction is complete and before transmission service can begin. CHEC is also working with Dare County officials to coordinate the safe return of visitors as soon as possible

From CHEC:  There are many people, partners and businesses we would like to thank. We are very appreciative of the support of our members, visitors, contract crews and PCL Construction for leading the excavation.





RELATED ARTICLES:

08.01.2017-Timeline for Repairs Reduced to 4-6 Days.html
08.01.2017-Progress SteadilyContinuesOnBothSolutionsUpdateForTuesdayAfternoon.html
08.01.2017-Time Frame Narrows As Progress To Dual Solutions Continue
07.31.2017-Significant Progress Made To Overhead Solution As Dual Solutions To Power Repairs Are Executed
07.31.2017-Steel Casing Was Being Set Aside When It Cut Power To Hatteras
07.31.2017-Governor Cooper Visits Excavation Site and Avon Pier
07.31.2017-Overnight Testing Reveals Only Two Cables Are Damaged
07.30.2017-Repairs Underway and Tentative Time Frame Established Outage Update For Sunday Evening July 30
07.30.2017-Pamlico Sound Ferry Routes To Adopt Alternate Schedule
07.30.2017-All Three Transmission Cables Compromised Outage Update For Sunday 8 am
07.28.2017-Severed Transmission Cable Exposed; Testing Planned to Determine Repair Timeline
07.29.2017-Evacuation Moves Forward while CHEC Continues Work to Provide Temporary Power
07.28.2017-Help Is On The Way: NC Ferry Division Delivers Generators To Ocracoke

07.28.2017-Mandatory Power Conservation Measures for Hatteras Island
07.28.2017-Mandatory Evacuation Order Issued for Hatteras Island Visitors
07.28.2017-Crews Working to Determine Time Frame for Power Cable Repairs
07.28.2017-"Today is going to be a better day."
07.27.2017-Gov. Cooper Signs State of Emergency for Hatteras, Ocracoke Islands 
07.27.2017-Visitors ordered to evacuate Ocracoke Island due to power outage.
07.27.2017-Hatteras and Ocracoke Island Power Outage – What We Know So Far
07.27.2017-Staying Hydrated and Safe with Power Outages on Hatteras Island
07.27.2017-Cause of Outage Determined; Update on Island Generator Power
07.27.2017-Widespread Power Outage Affects All Of Hatteras and Ocracoke




comments powered by Disqus