Macquarie Infrastructure Partners II Completes Acquisition of Leaf River Energy Center LLC

  Macquarie Infrastructure Partners II Completes Acquisition of Leaf River
  Energy Center LLC

  *High performance salt cavern storage facility located in Smith County,
    Mississippi permitted for four caverns and 32 Bcf of total working gas
    capacity
  *Uniquely positioned to capture Southeast and Northeast demand; ideally
    situated with access to multiple interstate pipelines
  *Demand for salt cavern storage capacity in the Southeast driven by
    gas-fired power generation
  *The facility’s current capacity is fully contracted with strong credit
    counterparties

Business Wire

NEW YORK -- December 03, 2012

Macquarie Infrastructure Partners II ("MIP II"), a leading North American
infrastructure fund, announced today that it has completed the acquisition of
Leaf River Energy Center LLC (“Leaf River”) from NGS Energy, LP.

Leaf River is a state-of-the-art underground salt cavern facility located in
Smith County, Mississippi. The Leaf River complex currently consists of two
commercially operational caverns with a third cavern under development. The
facility is currently permitted for four caverns and 32 Bcf of total working
gas capacity.

“We are excited to announce MIP II’s first acquisition in the midstream energy
space,” said Christopher Leslie, Chief Executive Officer of Macquarie
Infrastructure Partners Inc. “The increase in supply from shale gas production
and the projected growth in natural gas demand have created a significant need
for midstream infrastructure build-out across the U.S. Salt cavern facilities
in particular make for attractive investment opportunities given their ability
to provide customers with high performance gas storage as more power plants
use natural gas.”

Leaf River is strategically located with access to Southeast and Northeast
demand centers via direct interconnections with six interstate pipelines
including the Transco, Destin, Tennessee, Midcontinent Express, Gulf South and
Southern Natural pipelines. Leaf River is also closely situated to key supply
areas such as the Haynesville and Bossier shales. As a result, Leaf River is
well positioned to serve both summer-peaking gas-fired power generation loads
in the Southeast and winter-peaking residential and commercial demand in the
Northeast and Mid-Atlantic markets.

The MIP II manager is part of the Macquarie Group, which globally has invested
in a number of midstream assets, including the Dampier Bunbury Pipeline, Pisto
SAS and TanQuid.

Terms of the transaction were not disclosed.

MIP II was advised in this transaction by Macquarie Capital, Sidley Austin
LLP, Adams and Reese LLP, Pace Global, a Siemens Business and Black & Veatch
Management Consulting.

About Macquarie Infrastructure Partners

Macquarie Infrastructure Partners Inc. is a member of the Macquarie Group of
companies and manages the unlisted Macquarie Infrastructure Partners (MIP) and
Macquarie Infrastructure Partners II (MIP II) funds. MIP and MIP II have
combined equity under management of over $5.5 billion committed to
infrastructure investments in North America. MIP and MIP II have ownership
interests in a diversified portfolio of businesses, including waste services,
toll roads, bridges, utilities, ports, and telecommunications infrastructure.

About Macquarie Group

Macquarie Group (Macquarie) is a global provider of banking, financial,
advisory, investment and funds management services. Macquarie’s main business
focus is making returns by providing a diversified range of services to
clients. Macquarie acts on behalf of institutional, corporate and retail
clients and counterparties around the world. Founded in 1969, Macquarie
operates in more than 70 office locations in 28 countries. Macquarie employs
approximately 13,400 people and has assets under management of over $353
billion (as of September 30, 2012).

Contact:

Macquarie Group
Paula Chirhart, +1 212-231-1239
Corporate Communications