BOARDWALK PIPELINE PARTNERS

CUSIP: 096627104 Class: UT LTD PARTNER

TETRAD CORP's Holding History (CIK: 0000883597)

Note: Option positions (PUT/CALL) are excluded.

Q3 2009
Shares 25,000 Value ($000) $621 Avg Close — Range —
Q2 2009
Shares 25,000 Value ($000) $565 Avg Close — Range —