1) AECom

2) Allscripts Healthcare Solutions, Inc

3) American Airlines, Inc.

4) American Association of Consumer Credit Professionals

5) American Concrete Pavement Association

6) American Concrete Pipe Association

7) Association of American Railroads

8) Chesapeake Energy

9) Commercial Finance Coalition

10) Consumer Electronics Association (CEA)

11) Delaware Valley Regional Center

12) Direct Primary Care Coalition

13) Dredging Contractors of America

14) Exelon

15) Lawyers for Civil Justice

16) Oklahoma Department of Transportation

17) Partnership To Fight Chronic Disease

18) Portland Cement Association

19) Santa Rosa County, FL

20) SEPTA

21) Stella Jones Corporation (formerly known as McFarland Cascade Holdings, Inc.)

22) Wakpamni Lake Community Corporation - Arrowhead Advance

23) Williams Companies

1) American Concrete Pipe Association

2) Blue Sky

3) Borror Public Affairs

4) Brooks Construction Co., Inc.

5) Cardinal Strategies LLC

6) City of Carmel

7) Comcast

8) Fort Wayne-Allen County Airport Authority

9) Greater Fort Wayne Metro Chamber Alliance, Inc.

10) Ivy Tech Community College

11) RTM Ventures

12) Wal-Mart Stores, Inc

1) AECom

2) American Airlines, Inc.

3) American Concrete Pavement Association

4) American Concrete Pipe Association

5) Association of American Railroads

6) Chesapeake Energy

7) Consumer Electronics Association (CEA)

8) Dredging Contractors of America

9) Exelon

10) Oklahoma Department of Transportation

11) Portland Cement Association

12) Santa Rosa County, FL

13) Stella Jones Corporation (formerly known as McFarland Cascade Holdings, Inc.)

14) Williams Companies

1) AGGREPLEX AND ITS AFFILIATED ENTITIES

2) AMERICAN CONCRETE PIPE ASSOCIATION OF CALIFORNIA (ACPA-CA)

3) AMERICAN SOCIETY FOR THE PREVENTION OF CRUELTY TO ANIMALS

4) ASSOCIATION OF POSTCONSUMER PLASTIC RECYCLERS (APR)

5) BIODEGRADABLE PRODUCTS INSTITUTE (BPI)

6) CALAVERAS CEMENT COMPANY

7) CALIFORNIA LARGE ENERGY CONSUMERS ASSOCIATION

8) CALIFORNIA MOUNTAIN BIKING COALITION (CAMTB)

9) CALIFORNIA NEVADA CEMENT ASSOCIATION (CNCA)

10) CALIFORNIA OUTDOOR RECREATION PARTNERSHIP, INC. (CORP)

11) CALIFORNIA PARK & RECREATION SOCIETY

12) CALIFORNIA PRECAST CONCRETE ASSOCIATION

13) CALIFORNIA TRAILS FOUNDATION

14) CALPORTLAND COMPANY

15) CEMEX INC.

16) CJ BIOMATERIALS, INC.

17) EVEZ CHARGING FOUNDATIONS

18) HANSON PERMANENTE CEMENT, INC.

19) KB CENTER LLC

20) LOS ANGELES, COUNTY OF

21) MITSUBISHI CEMENT COMPANY (MCC)

22) NATIONAL CEMENT COMPANY OF CALIFORNIA

23) NATUREWORKS LLC

24) NORTH LAKE TAHOE RESORT ASSOCIATION, INC. DBA NORTH TAHOE COMMUNITY ALLIANCE

25) NORTH TAHOE FIRE PROTECTION DISTRICT

26) NORTH TAHOE PUBLIC UTILITY DISTRICT

27) NOVAMONT NORTH AMERICA, INC.

28) PACIFIC STEEL GROUP (PSG)

29) PCI WEST

30) POTENTIAL INDUSTRIES, INC.

31) PRE-CON PRODUCTS

32) PROTECT AMERICAN RIVER CANYONS (PARC)

33) RECYCLING PARTNERSHIP, THE

34) RIO TINTO SERVICES, INC.

35) SAVE MOUNT DIABLO

36) SIERRA BUSINESS COUNCIL

37) SIERRA CONSORTIUM

38) SONOMA COUNTY REGIONAL PARKS

39) SOUTH TAHOE PUBLIC UTILITY DISTRICT

40) TAHOE CITY PUBLIC UTILITY DISTRICT

41) U.S. BORAX INC.

42) UNACEM NORTH AMERICA (DRAKE CEMENT & TEHACHAPI CEMENT)

43) VLS ENVIRONMENTAL SOLUTIONS

44) WESTERN PLASTICS ASSOCIATION

1) American Concrete Pipe Association

2) American Society of Home Inspectors

3) American Staffing Association

4) ASCA

5) Colorado Auto Recyclers

6) Colorado Wyoming Petroleum Marketers

7) Farwest Equipment Dealers Association

8) General Cigar Co., Inc.

9) GreenCO

10) Hicks & Associates

11) Independent Electrical Contractors Rocky Mountain

12) Irrigation Association

13) Pilot Travel Centers

14) PMI Global Services Inc. and Affiliates

15) Smoker Friendly International

1) American Concrete Pipe Association

2) AUTODESK, INC

3) Forterra

4) Metropolitan Transportation Commission

5) Norfolk Southern

6) Owner-Operators Independent Drivers Association

7) Professional Engineers in California Government

8) Rails to Trails Conservancy

9) SB Capitol Solutions on behalf of U.S. Travel Association

10) Texas Central Partners

11) The Association of Union Constructors

12) The Doerrer Group on behalf of Uber Technologies, Inc.

13) Tri-County Metropolitan Transportation District of Oregon (TriMet)

14) Washington State Department of Transportation

1) American Concrete Pipe Association

2) National Electrical Contractors Association, Ohio/Michigan Chapter

1) AECOM

2) AMERICAN AIRLINES, INC.

3) AMERICAN CONCRETE PAVEMENT ASSOCIATION

4) AMERICAN CONCRETE PIPE ASSOCIATION

5) ASSOCIATION OF AMERICAN RAILROADS

6) CHESAPEAKE ENERGY

7) CONSUMER ELECTRONICS ASSOCIATION (CEA)

8) DELAWARE VALLEY REGIONAL CENTER

9) DREDGING CONTRACTORS OF AMERICA

10) EXELON

11) OKLAHOMA DEPARTMENT OF TRANSPORTATION

12) SEPTA

13) WILLIAMS COMPANIES

1) American Concrete Pipe Association

2) Ascend Performance Materials LLC

3) AUTODESK, INC

4) City of Lynnwood, WA

5) CITY OF TUKWILA (WA)

6) CLACKAMAS COUNTY, OR

7) Confederated Tribes of Grand Ronde

8) Forterra

9) Friends of Frog Ferry

10) Lone Elk Partners

11) Metro

12) Metropolitan Transportation Commission

13) National Forest Homeowners

14) Norfolk Southern

15) Oregon Independent Medical Clinics

16) Oregon Shipping Group

17) Owner-Operators Independent Drivers Association

18) Port of Hood River, Oregon

19) Port of Pasco

20) PORT OF WALLA WALLA

21) Professional Engineers in California Government

22) Rail Security Alliance

23) Rails to Trails Conservancy

24) SB Capitol Solutions on behalf of U.S. Travel Association

25) Texas Central Partners

26) The Association of Union Constructors

27) The Doerrer Group on behalf of Uber Technologies, Inc.

28) THE GREENBRIER COMPANIES

29) Tri-County Metropolitan Transportation District of Oregon (TriMet)

30) Washington State Department of Transportation

31) Yamhill County, Oregon