31:
295:. One of his greatest contributions to filtration technology was the derivation of two terms for describing the size distribution of filter media: effective size and uniformity coefficient. These two parameters are used today to specify the size of filter materials for water purification applications. His first book,
253:
which described the flow of water in pipelines. In 1905, the two engineers published an influential book, which contained solutions to the Hazen-Williams equation for pipes of widely varying diameters. The equation uses an empirically derived constant for the “roughness” of the pipe walls which
430:
which is the highest honor given by the
American Society of Civil Engineers for a technical paper that "makes a definitive contribution to engineering science." He was selected as an Honorary Member of the American Water Works Association in 1930. In 1971, he was inducted into the AWWA Water
348:
was highly contaminated with sewage and industrial wastes, which was a nuisance to the cities below and which made it impossible to use the river water for any purpose. Hazen was hired by a joint committee established to find a solution to the regional water contamination problem. His
385:
Hazen’s clients included Albany, New York; New York City; Washington, DC; San
Francisco, California; Lawrence and Springfield, Massachusetts; Providence, Rhode Island; Pittsburgh and Philadelphia, Pennsylvania; St. Louis, Missouri, Brisbane, Australia; and Ottawa and Toronto, Canada.
398:. In 1903, he married Elizabeth McConway in Pittsburgh. They had four daughters and two sons. Their son Richard Hazen (1911-1990) was also a professional engineer in the field of water supply and wastewater engineering, and founded the consulting firm Hazen and Sawyer in 1951.
321:) was just beginning to be understood as a treatment process. As a conservative engineer, Hazen recommended that the City install slow sand filters to remove both turbidity and harmful bacteria from its water supply. As early as 1904, Hazen recommended the filtration of the
232:
in
Lawrence, Massachusetts. LES was likely the first institute in the world devoted solely to investigations of water purification and sewage treatment. From 1888 to 1893, Hazen headed the research team at this innovative research institute into
349:
recommendations (which were eventually implemented) included a trunk sewer to capture wastes prior to their discharge into the River and to deliver the wastes to a sewage treatment plant near the mouth of the River.
546:
Hall, Ellen L. “Hydraulics in the Golden Age of
Sanitary Engineering: The Life of Allen Hazen.” Presented at the Darcy Memorial Symposium on the History of Hydraulics. Philadelphia, PA. June 23-6, 2003.
269:. Hazen specifically reported on the soundness of the Gatun Dam (an integral structure in the canal system), which he said was constructed of the proper materials and not in any danger of failure.
302:
His first assignment as a sole practitioner in 1897 was the design of the filtration plant at Albany, New York. The plant was the first continuously operated slow sand filter plant in the U.S.
272:
Late in his career, Hazen concentrated on ways to statistically describe the recurrence interval of flood flows in rivers. His book on the subject was published the year he died.
419:
410:. In the fall of 1929, Hazen and his wife attended the World Engineering Congress in Tokyo, Japan as a representative of the American Society of Civil Engineers.
378:
In 1897, Allen Hazen opened up a single person practice in New York City and for a couple of years, shared the same address as one of his professional colleagues,
190:
279:
was built in 1930–31 in Des Moines, Iowa. Hazen designed the tower shortly before he died. In his honor, the City of Des Moines named the tower after him.
717:
810:
406:
He was active in numerous professional associations. He was
President of the New England Water Works Association and Vice President of the
550:
805:
533:
791:
756:
845:
394:
For many years, Allen Hazen lived in New York City. For most of the last decades of his life, Hazen and his family lived in
407:
174:
129:
121:
718:"Allen Hazen is Dead; Expert in Hydraulics; Directed Flood Control in New Jersey and Water Systems in Many Large Cities"
497:
453:
835:
161:. His career extended from 1888 to 1930, and he is, perhaps, best known for his contributions to hydraulics with the
334:
133:
707:
American Public Health
Association. (1899). Public Health Papers and Reports. Vol. 24, Columbus, OH:APHA, p. xxi.
577:
Winslow, Charles E.A. “They Were Giants in Those Days.” American
Journal of Public Health. 43 (June 1953): 15-9.
325:
water supply for New York City. As of 2012, a new filtration plant on that water supply is nearing completion.
736:
333:
At the age of 24, Hazen was charged with the responsibility for sewage collection and disposal for the 1893
599:
840:
288:
229:
228:
As a direct result of his association with Dr. Thomas M. Drown, Hazen was offered his first job at the
548:
357:
For most of his career, Hazen was a consulting engineer to many municipalities and other clients.
276:
250:
162:
800:
209:
772:
565:
395:
830:
825:
345:
528:
Brown, Edward S. (1995). “The
Hanover Water Works Company: One Hundred Years of Service.”
8:
205:
173:. He was President of the New England Water Works Association and Vice President of the
73:
789:
Allen Hazen's
Photograph Album World Engineering Congress, Tokyo, October-November 1929
309:, Pennsylvania, to determine the best method of providing a safe water supply from the
258:
234:
154:
423:
318:
310:
292:
217:
194:
186:
85:
788:
753:
432:
379:
238:
213:
158:
54:
695:
145:(August 28, 1869 – July 26, 1930) was an American civil engineer and an expert in
795:
760:
322:
266:
371:
249:
Hazen is most widely known for developing in 1902 with
Gardner S. Williams the
30:
819:
554:
341:
314:
166:
150:
671:
Report of the Filtration Commission of the City of Pittsburgh, Pennsylvania.
469:
Report of the Filtration Commission of the City of Pittsburgh, Pennsylvania.
444:
Sedgwick, William T. and Hazen, Allen. (1892). “Typhoid Fever in Chicago.”
427:
262:
261:
to a panel of expert engineers to inspect the construction progress on the
125:
684:
Report on the Joint Committee on Sewage Disposal of the City of Paterson.
490:
Report on the Joint Committee on Sewage Disposal of the City of Paterson.
460:
Hazen, Allen, (1896). “The Measurement of the Colors of Natural Waters,”
204:(1887–88), Hazen studied chemistry and came into contact with Professor
306:
170:
146:
35:
Allen Hazen, President of the New England Water Works Association, 1911
197:) and graduated with a Bachelor of Science degree at 15 years of age.
96:
BS, New Hampshire College of Agriculture and Mechanical Arts, 1884
474:
Hazen, Allen. (1905). “Purification of Water for Domestic Use.”
374:, Chester M. Everett and L.N. Babbitt), New York City, 1924–1930
669:
Hazen, Allen. (1899). “Report of the Consulting Engineer.” In
467:
Hazen, Allen. (1899). “Report of the Consulting Engineer.” In
418:
Hazen received honorary degrees of Doctor of Science from both
189:
close to the small town of Norwich, Vermont. He attended the
806:
The Hanover Water Works Company: One Hundred Years of Service
299:
which was published in 1895, is still considered a classic.
291:
established some of the basic parameters for the design of
185:
Hazen was born in 1869 on his family farm located near the
201:
420:
New Hampshire College of Agriculture and Mechanical Arts
191:
New Hampshire College of Agriculture and Mechanical Arts
743:. Washington, DC: National Academy of Engineering (US).
614:(1909). “Reports Gatun Dam Solid and Sound.” March 23.
112:
Outstanding engineering achievements in several fields
431:
Industry Hall of Fame with his friend and colleague,
625:
Flood Flows: A Study of Frequencies and Magnitudes.
506:
Flood Flows: A Study of Frequencies and Magnitudes.
801:Theodore Roosevelt's Letter to John Ripley Freeman
682:Hazen, Allen. (1906). “Report of Allen Hazen.” In
488:Hazen, Allen. (1906). “Report of Allen Hazen.” In
317:epidemics. At the time, mechanical filtration (or
305:One of his early assignments was as consultant to
361:Noyes and Hazen, Boston, Massachusetts, 1895–1897
328:
817:
254:became known as the Hazen-Williams coefficient.
165:. Hazen published some of the seminal works on
586:Williams, Gardner S. and Hazen, Allen. (1905).
481:Williams, Gardner S. and Hazen, Allen. (1905).
438:
313:. For decades, the city had been wracked with
335:Chicago World’s Fair and Columbian Exposition
401:
367:Hazen and Whipple, New York City, 1904–1924
180:
257:In 1908, Hazen was appointed by President
29:
364:Single practice, New York City, 1897–1904
638:The Filtration of Public Water-Supplies.
454:The Filtration of Public Water-Supplies.
297:The Filtration of Public Water Supplies,
658:Jour. American Water Works Association.
652:
650:
648:
646:
524:
522:
818:
542:
540:
244:
446:Engr. News and American Railway Jour.
282:
132:, 1915; Water Industry Hall of Fame,
734:
643:
519:
370:Hazen and others (Weston E. Fuller,
566:Lawrence Experiment Station History
537:
530:Dartmouth College Library Bulletin.
408:American Society of Civil Engineers
352:
175:American Society of Civil Engineers
130:American Society of Civil Engineers
122:American Society of Civil Engineers
16:American civil engineer (1869–1930)
13:
14:
857:
782:
426:(1917). In 1915, he received the
811:AWWA Water Industry Hall of Fame
773:AWWA Water Industry Hall of Fame
389:
134:American Water Works Association
766:
747:
728:
710:
701:
689:
676:
663:
754:Allen Hazen's Photograph Album
630:
617:
605:
593:
580:
571:
559:
498:Clean Water and How to Get It.
329:Sewage collection and disposal
1:
512:
846:People from Norwich, Vermont
439:Limited list of publications
120:Thomas Fitch Rowland Prize,
7:
600:Hazen-Williams Coefficients
289:Lawrence Experiment Station
230:Lawrence Experiment Station
193:(which was affiliated with
10:
862:
287:Hazen’s early work at the
737:"Richard Hazen 1911-1990"
724:. 1930-07-27. p. 23.
413:
402:Professional associations
223:
116:
108:
100:
92:
81:
62:
40:
28:
21:
836:Dartmouth College alumni
735:Okun, Daniel A. (1993).
181:Early life and education
673:Pittsburgh:n.p., 27-86.
656:”Allen Hazen.” (1930).
471:Pittsburgh:n.p., 27-86.
277:Allen Hazen Water Tower
251:Hazen-Williams equation
200:During a year spent at
163:Hazen-Williams equation
636:Hazen, Allen. (1895).
623:Hazen, Allen. (1930).
504:Hazen, Allen. (1930).
495:Hazen, Allen. (1916).
462:American Chemist Jour.
451:Hazen, Allen. (1895).
396:Dobbs Ferry, New York
319:rapid sand filtration
265:with President-elect
696:Malcolm Pirnie, Inc.
346:Paterson, New Jersey
340:For many years, the
212:and fellow students
245:Hydraulics and dams
210:Dr. Thomas M. Drown
206:William T. Sedgwick
104:Consulting engineer
74:Miles City, Montana
841:American engineers
794:2011-06-24 at the
775:Accessed 12-06-29.
763:Accessed 12-06-29.
759:2011-06-24 at the
722:The New York Times
698:Accessed 12-06-29.
602:Accessed 12-06-29.
568:Accessed 12-06-29.
478:54:Part D, 131-54.
283:Water purification
259:Theodore Roosevelt
235:water purification
155:water purification
741:Memorial Tributes
588:Hydraulic Tables.
483:Hydraulic Tables.
424:Dartmouth College
382:at 220 Broadway.
311:Monongahela River
293:slow sand filters
218:George C. Whipple
195:Dartmouth College
187:Connecticut River
140:
139:
86:Hartford, Vermont
853:
776:
770:
764:
751:
745:
744:
732:
726:
725:
714:
708:
705:
699:
693:
687:
680:
674:
667:
661:
654:
641:
640:New York: Wiley.
634:
628:
621:
615:
609:
603:
597:
591:
584:
578:
575:
569:
563:
557:
544:
535:
526:
433:George W. Fuller
380:George W. Fuller
353:Consulting firms
239:sewage treatment
214:George W. Fuller
159:sewage treatment
69:
55:Norwich, Vermont
50:
48:
33:
19:
18:
861:
860:
856:
855:
854:
852:
851:
850:
816:
815:
796:Wayback Machine
785:
780:
779:
771:
767:
761:Wayback Machine
752:
748:
733:
729:
716:
715:
711:
706:
702:
694:
690:
681:
677:
668:
664:
655:
644:
635:
631:
627:New York:Wiley.
622:
618:
612:New York Times.
610:
606:
598:
594:
590:New York:Wiley.
585:
581:
576:
572:
564:
560:
545:
538:
527:
520:
515:
508:New York:Wiley.
501:New York:Wiley.
485:New York:Wiley.
457:New York:Wiley.
441:
416:
404:
392:
355:
331:
285:
267:William H. Taft
247:
226:
183:
77:
71:
67:
58:
52:
51:August 28, 1869
46:
44:
36:
24:
17:
12:
11:
5:
859:
849:
848:
843:
838:
833:
828:
814:
813:
808:
803:
798:
784:
783:External links
781:
778:
777:
765:
746:
727:
709:
700:
688:
675:
662:
660:22:9, 1268-70.
642:
629:
616:
604:
592:
579:
570:
558:
553:2012-12-14 at
536:
517:
516:
514:
511:
510:
509:
502:
493:
486:
479:
472:
465:
458:
449:
440:
437:
415:
412:
403:
400:
391:
388:
376:
375:
372:Malcolm Pirnie
368:
365:
362:
354:
351:
330:
327:
284:
281:
246:
243:
225:
222:
182:
179:
138:
137:
118:
114:
113:
110:
109:Known for
106:
105:
102:
98:
97:
94:
90:
89:
83:
79:
78:
72:
70:(aged 60)
64:
60:
59:
53:
42:
38:
37:
34:
26:
25:
22:
15:
9:
6:
4:
3:
2:
858:
847:
844:
842:
839:
837:
834:
832:
829:
827:
824:
823:
821:
812:
809:
807:
804:
802:
799:
797:
793:
790:
787:
786:
774:
769:
762:
758:
755:
750:
742:
738:
731:
723:
719:
713:
704:
697:
692:
686:Paterson:n.p.
685:
679:
672:
666:
659:
653:
651:
649:
647:
639:
633:
626:
620:
613:
608:
601:
596:
589:
583:
574:
567:
562:
556:
555:archive.today
552:
549:
543:
541:
534:
531:
525:
523:
518:
507:
503:
500:
499:
494:
492:Paterson:n.p.
491:
487:
484:
480:
477:
473:
470:
466:
463:
459:
456:
455:
450:
447:
443:
442:
436:
434:
429:
425:
421:
411:
409:
399:
397:
390:Personal life
387:
383:
381:
373:
369:
366:
363:
360:
359:
358:
350:
347:
343:
342:Passaic River
338:
336:
326:
324:
320:
316:
315:typhoid fever
312:
308:
303:
300:
298:
294:
290:
280:
278:
273:
270:
268:
264:
260:
255:
252:
242:
240:
236:
231:
221:
219:
215:
211:
207:
203:
198:
196:
192:
188:
178:
176:
172:
168:
167:sedimentation
164:
160:
156:
152:
151:flood control
148:
144:
135:
131:
127:
123:
119:
115:
111:
107:
103:
99:
95:
91:
87:
84:
82:Resting place
80:
75:
66:July 26, 1930
65:
61:
56:
43:
39:
32:
27:
20:
768:
749:
740:
730:
721:
712:
703:
691:
683:
678:
670:
665:
657:
637:
632:
624:
619:
611:
607:
595:
587:
582:
573:
561:
529:
505:
496:
489:
482:
476:Trans. ASCE.
475:
468:
461:
452:
445:
428:Norman Medal
417:
405:
393:
384:
377:
356:
339:
332:
304:
301:
296:
286:
274:
271:
263:Panama Canal
256:
248:
227:
199:
184:
142:
141:
126:Norman Medal
68:(1930-07-26)
831:1930 deaths
826:1869 births
422:(1913) and
143:Allen Hazen
23:Allen Hazen
820:Categories
513:References
307:Pittsburgh
171:filtration
147:hydraulics
101:Occupation
47:1869-08-28
448:April 21.
93:Education
792:Archived
757:Archived
551:Archived
464:18: 364.
124:, 1900;
532:April.
136:, 1971.
414:Honors
344:below
323:Croton
224:Career
117:Awards
88:, USA
76:, USA
57:, USA
275:The
237:and
216:and
169:and
157:and
63:Died
41:Born
202:MIT
822::
739:.
720:.
645:^
539:^
521:^
435:.
337:.
241:.
220:.
208:,
177:.
153:,
149:,
128:,
49:)
45:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
