Why Colonial Pipeline "isn't concerned with the effects" of WRQs quarry

Because their history is one of not being concerned......

Colonial Pipeline Company Civil Settlement
Seven Oil Spills Forming Basis of Penalty

Overview: On April 1, 2003, the United States announced a settlement with Colonial Pipeline Company resolving violations of the Clean Water Act arising from spills from the company’s pipeline in several states.

Under the consent decree, Colonial will upgrade environmental protection on the pipeline at an estimated cost of at least $30 million, and pay $34 million, the largest civil penalty a company has paid in EPA history.

The United States filed a complaint on Nov. 28, 2000, in the Northern District of Georgia. The Clean Water Act authorizes penalties up to $1,100 per barrel discharged, and up to $3,300 per barrel discharged for violations that are the result of gross negligence.
http://www.epa.gov/compliance/resources/cases/civil/cwa/colonialfs.pdf

The EPA document regarding the history of this company, belies the intent of the Colonial Pipeline Company letter to White Rock Quarries that "they are not concerned with the nearby quarry's effects on their pipelines."

NTSB PDF file on South Carolina 1996 rupture in the Reedy River :

http://www.ntsb.gov/Publictn/1998/PAR9801.pdf 

Read the Conclusions section to learn how often and habitually this company has operated in a negligent manner. There is no precedent for us to believe anything in the letter from Colonial Pipeline presented to our Council.

An interesting question is why did Plantation Pipeline not respond to queries from WRQ and their representatives regarding their own concern for their line from the effects of the WRQ quarry?

WRQ Geologist, Robert Wood, "answered for them" in his March 2010 Memorandum to the Vincent Planning Commission; in his clients' interest of course.