The Securities and Exchange Commission has not necessarily reviewed the information in this filing and has not determined if it is accurate and complete.
The reader should not assume that the information is accurate and complete.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 13F

FORM 13F INFORMATION TABLE
OMB APPROVAL
OMB Number: 3235-0006
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COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5 COLUMN 6 COLUMN 7 COLUMN 8
VALUE SHRS OR SH/ PUT/ INVESTMENT OTHER VOTING AUTHORITY
NAME OF ISSUER TITLE OF CLASS CUSIP (x$1000) PRN AMT PRN CALL DISCRETION MANAGER SOLE SHARED NONE
Advanced Drainage Systems Inc COM 00790R104 73 2,826 SH   SOLE   2,826 0 0
Aegion Corp COM 00770F104 178 7,787 SH   SOLE   7,787 0 0
American Midstream Partners LP COM UNITS 02752P100 57 5,253 SH   SOLE   5,253 0 0
American States Water Company COM 029899101 98 1,844 SH   SOLE   1,844 0 0
American Water Works Company, Inc. COM 030420103 10 4,008 SH   SOLE   4,008 0 0
Andeavor Logistics LP COM UNIT LP INT 03350F106 520 11,604 SH   SOLE   11,604 0 0
Antero Midstream GP LP COM SHS REPSTG 03675Y103 80 5,007 SH   SOLE   5,007 0 0
Antero Midstream Partners LP UNT LTD PARTN 03673L103 296 11,427 SH   SOLE   11,427 0 0
Ao Smith Corp COM 831865209 319 5,021 SH   SOLE   5,021 0 0
Aqua America, Inc. COM 03836W103 304 8,937 SH   SOLE   8,937 0 0
Aquaventure Holdings Ltd SHS G0443N107 16 1,327 SH   SOLE   1,327 0 0
Archrock, Inc. COM 03957W106 287 32,822 SH   SOLE   32,822 0 0
Artesian Resources Corp CL A 043113208 15 417 SH   SOLE   417 0 0
Atmos Energy Corp COM 049560105 4,389 52,105 SH   SOLE   52,105 0 0
Badger Meter, Inc. COM 056525108 69 1,462 SH   SOLE   1,462 0 0
Blueknight Energy Partners, L.P. COM UNIT 09625U109 21 4,853 SH   SOLE   4,853 0 0
BP Midstream Partners LP UNIT LTD PTNR 0556EL109 54 3,003 SH   SOLE   3,003 0 0
Buckeye Partners, L.P. UNIT LTD PTNR 118230101 715 19,116 SH   SOLE   19,116 0 0
Cadiz Inc. COM NEW 127537207 15 1,144 SH   SOLE   1,144 0 0
California Water Service Group COM 130788102 90 2,411 SH   SOLE   2,411 0 0
Cantel Medical Corp COM 138098108 172 1,544 SH   SOLE   1,544 0 0
Cheniere Energy Inc. COM NEW 16411R208 5,072 94,884 SH   SOLE   94,884 0 0
Cheniere Energy Partners LP COM UNIT 16411Q101 164 5,647 SH   SOLE   5,647 0 0
Cheniere Energy Partners LP Holdings, LLC COM REP LLC IN 16411W108 507 18,375 SH   SOLE   18,375 0 0
Chesapeake Utilities Corporation COM 165303108 527 7,492 SH   SOLE   7,492 0 0
CNX Midstream Partners LP COM 12654A101 47 2,573 SH   SOLE   2,573 0 0
Connecticut Water Service, Inc. COM 207797101 37 607 SH   SOLE   607 0 0
Crestwood Equity Partners LP UNIT LTD PARTNER 226344208 167 6,535 SH   SOLE   6,535 0 0
CrossAmerica Partners LP UT LTD PTN INT 22758A105 48 2,349 SH   SOLE   2,349 0 0
DCP Midstream LP COM UT LTD PTN 23311P100 413 11,766 SH   SOLE   11,766 0 0
Delek Logistics Partners LP COM UNT RP INT 24664T103 32 1,145 SH   SOLE   1,145 0 0
Dominion Energy Midstream Partners LP COM UT REP LTD 257454108 89 5,798 SH   SOLE   5,798 0 0
Ecolab Inc. COM 278865100 189 1,381 SH   SOLE   1,381 0 0
Enable Midstream Partners LP COM UNIT RP IN 292480100 156 11,406 SH   SOLE   11,406 0 0
Enbridge Energy Management, LLC SHS UNITS LLI 29250X103 100 10,902 SH   SOLE   10,902 0 0
Enbridge Energy Partners, L.P. COM 29250R106 336 34,895 SH   SOLE   34,895 0 0
Enbridge Inc COM 29250N105 8,810 279,939 SH   SOLE   279,939 0 0
Energy Recovery Inc COM 29270J100 22 2,694 SH   SOLE   2,694 0 0
Energy Transfer Equity, L.P. COM UT LTD PTN 29273V100 1,599 112,509 SH   SOLE   112,509 0 0
Energy Transfer Partners, L.P. UNIT LTD PRT INT 29278N103 2,264 139,578 SH   SOLE   139,578 0 0
Enlink Midstream Partners, LP COM UNIT REP LTD 29336U107 293 21,440 SH   SOLE   21,440 0 0
Enlink Midstream, LLC COM UNIT REP LTD 29336T100 437 29,824 SH   SOLE   29,824 0 0
Enterprise Products Partners L.P. COM 293792107 4,670 190,779 SH   SOLE   190,779 0 0
EQT GP Holdings LP COM UNIT REP 26885J103 83 3,587 SH   SOLE   3,587 0 0
EQT Midstream Partners, LP UNIT LTD PARTN 26885B100 453 7,666 SH   SOLE   7,666 0 0
Evoqua Water Technologies Corp COM 30057T105 242 11,387 SH   SOLE   11,387 0 0
Franklin Electric Co Inc COM 353514102 95 2,342 SH   SOLE   2,342 0 0
Genesis Energy L.P. UNIT LTD PARTN 371927104 271 13,739 SH   SOLE   13,739 0 0
Global Partners LP COM UNITS 37946R109 56 3,619 SH   SOLE   3,619 0 0
Gorman-Rupp Co/The COM 383082104 38 1,312 SH   SOLE   1,312 0 0
Hess Midstream Partners LP UNIT LTD PR INT 428104103 38 1,973 SH   SOLE   1,973 0 0
Holly Energy Partners, L.P. COM UT LTD PTN 435763107 153 5,563 SH   SOLE   5,563 0 0
Itron, Inc. COM 465741106 177 2,480 SH   SOLE   2,480 0 0
Kinder Morgan Inc COM 49456B101 8,257 548,250 SH   SOLE   548,250 0 0
Lindsay Corporation COM 535555106 49 532 SH   SOLE   532 0 0
Magellan Midstream Partners, L.P. COM UNIT RP LP 559080106 1,735 29,740 SH   SOLE   29,740 0 0
Middlesex Water Co COM 596680108 30 820 SH   SOLE   820 0 0
MPLX LP COM UNIT REP LTD 55336V100 1,230 37,241 SH   SOLE   37,241 0 0
Mueller Water Products, Inc. COM SER A 624758108 87 7,979 SH   SOLE   7,979 0 0
National Fuel Gas Co COM 636180101 2,071 40,258 SH   SOLE   40,258 0 0
New Jersey Resources Corporation COM 646025106 1,650 41,135 SH   SOLE   41,135 0 0
Nisource Inc COM 65473P105 3,787 158,398 SH   SOLE   158,398 0 0
Noble Midstream Partners LP COM UNIT REPST 65506L105 94 2,024 SH   SOLE   2,024 0 0
Northwest Natural Gas Co COM 667655104 762 13,219 SH   SOLE   13,219 0 0
NuStar Energy L.P. UNIT COM 67058H102 224 10,973 SH   SOLE   10,973 0 0
NuStar GP Holdings LLC UNIT RESTG LLC 67059L102 53 4,576 SH   SOLE   4,576 0 0
Oasis Midstream Partners LP COM UNITS REPS 67420T206 19 1,047 SH   SOLE   1,047 0 0
ONE Gas, Inc. COM 68235P108 1,615 24,462 SH   SOLE   24,462 0 0
ONEOK, Inc COM 682680103 8,829 155,108 SH   SOLE   155,108 0 0
PBF Logistics LP UNIT LTD PTNR 69318Q104 57 3,110 SH   SOLE   3,110 0 0
Pembina Pipeline Corp COM 706327103 7,376 236,388 SH   SOLE   236,388 0 0
Pentair plc SHS G7S00T104 316 4,635 SH   SOLE   4,635 0 0
Phillips 66 Partners LP COM UNIT REP INT 718549207 310 6,494 SH   SOLE   6,494 0 0
Plains All American Pipeline, L.P. UNIT LTD PARTN 726503105 1,228 55,762 SH   SOLE   55,762 0 0
Plains GP Holdings, L.P. LTD PARTNR INT A 72651A207 1,582 72,727 SH   SOLE   72,727 0 0
Rexnord Corp COM 76169B102 184 6,198 SH   SOLE   6,198 0 0
Rice Midstream Partners LP UNIT LTD PARTN 762819100 185 10,203 SH   SOLE   10,203 0 0
Select Energy Services Inc. CL A COM 81617J301 38 2,976 SH   SOLE   2,976 0 0
Semgroup Corp CL A 81663A105 653 30,513 SH   SOLE   30,513 0 0
Shell Midstream Partners LP UNIT LTD INT 822634101 368 17,501 SH   SOLE   17,501 0 0
Sjw Corp COM 784305104 54 1,030 SH   SOLE   1,030 0 0
South Jersey Industries, Inc. COM 838518108 1,036 36,789 SH   SOLE   36,789 0 0
Southwest Gas Holdings Inc COM 844895102 1,528 22,597 SH   SOLE   22,597 0 0
Spectra Energy Partners, LP COM 84756N109 383 11,375 SH   SOLE   11,375 0 0
Spire Inc COM 84857L101 1,642 22,707 SH   SOLE   22,707 0 0
Sprague Resources, LP COM UNIT REP LTD 849343108 32 1,350 SH   SOLE   1,350 0 0
Summit Midstream Partners LP COM UNIT LTD 866142102 89 6,330 SH   SOLE   6,330 0 0
Sunoco LP COM U REP LP 86765K109 197 7,735 SH   SOLE   7,735 0 0
Tallgrass Energy GP, LP SHS CL A 874696107 511 26,873 SH   SOLE   26,873 0 0
Tallgrass Energy Partners, LP COM UNIT 874697105 246 6,504 SH   SOLE   6,504 0 0
Targa Resources Corp. COM 87612G101 4,455 101,248 SH   SOLE   101,248 0 0
TC Pipeline, L.P. UT COM LTD PRT 87233Q108 253 7,281 SH   SOLE   7,281 0 0
Tetra Tech, Inc. COM 88162G103 176 3,601 SH   SOLE   3,601 0 0
The York Water Co COM 987184108 20 646 SH   SOLE   646 0 0
Transcanada Corp COM 89353D107 8,419 203,812 SH   SOLE   203,812 0 0
Transmontaigne Partners, L.P. COM UNIT L P 89376V100 62 1,731 SH   SOLE   1,731 0 0
USA Compression Partners LP COMUNIT LTDPAR 90290N109 66 3,907 SH   SOLE   3,907 0 0
USD Partners LP COM UT REP LTD 903318103 19 1,835 SH   SOLE   1,835 0 0
Valero Energy Partners LP COM UNT REP LP 91914J102 107 3,033 SH   SOLE   3,033 0 0
Valmont Industries Inc COM 920253101 184 1,261 SH   SOLE   1,261 0 0
Watts Water Technologies, Inc. CL A 942749102 108 1,390 SH   SOLE   1,390 0 0
Western Gas Equity Partners, LP COMUNT LTD PT 95825R103 181 5,460 SH   SOLE   0 0 0
Western Gas Partners LP COM UNIT LP IN 958254104 535 12,529 SH   SOLE   12,529 0 0
WGL Holdings, Inc. COM 92924F106 2,010 24,023 SH   SOLE   24,023 0 0
Williams Companies, Inc COM 969457100 6,951 279,609 SH   SOLE   279,609 0 0
Williams Partners L.P. COM UNIT LTD PAR 96949L105 1,068 31,032 SH   SOLE   31,032 0 0
Xylem Inc. COM 98419M100 13 4,206 SH   SOLE   4,206 0 0