Tag Archives: Cryptosporidium parvum

March 1, 1993: Milwaukee Crypto Outbreak; 1930: Death of Clemens Herschel

Depiction of Cryptosporidium parvum oocysts excystation in the gut

March 1, 1993:  Outbreak of cryptosporidiosis in Milwaukee, WI. From this date until April 28 is generally regarded as the duration of the outbreak of the disease.  People in the area receiving the water began getting sick during this period and soon emergency rooms and doctors’ offices were overtaxed.  It has been estimated that over 400,000 people were sickened and over 100 people died.

“To assess the total medical costs and productivity losses associated with the 1993 waterborne outbreak of cryptosporidiosis in Milwaukee, Wisconsin, including the average cost per person with mild, moderate, and severe illness, we conducted a retrospective cost-of-illness analysis using data from 11 hospitals in the greater Milwaukee area and epidemiologic data collected during the outbreak. The total cost of outbreak-associated illness was $96.2 million: $31.7 million in medical costs and $64.6 million in productivity losses. The average total costs for persons with mild, moderate, and severe illness were $116, $475, and $7,808, respectively. The potentially high cost of waterborne disease outbreaks should be considered in economic decisions regarding the safety of public drinking water supplies.”

Reference:  Corso, P.S. et al. 2003. “Cost of Illness in the 1993 Waterborne Cryptosporidium Outbreak, Milwaukee, Wisconsin.” Emerging Infectious Diseases. 9:4.

Commentary:  Based on the evidence I have seen, the Howard Avenue Water Purification Plant lost control of its particle removal process, which caused high concentrations of viable Cryptosporidium parvumoocysts to enter the distribution system. The only disinfectant that the water utility was using at that time was free chlorine, which is ineffective for killing this pathogen. Since the outbreak, the water treatment system in Milwaukee has been significantly upgraded. http://bit.ly/YPPGdK

March 1, 1930:  Clemens Herschel dies.“Clemens Herschel (March 23, 1842 – March 1, 1930) was an American hydraulic engineer. His career extended from about 1860 to 1930, and he is best known for developing the Venturi meter, which was the first large-scale, accurate device for measuring water flow.

Clemens was born in Boston, Massachusetts, and spent most of his life practicing his profession in New York and New Jersey. He attended Harvard University, where he received his bachelor of science degree in 1860 from the Lawrence Scientific School. After Harvard, he completed post-graduate studies in France and Germany.

The first part of Herschel’s career was devoted to bridge design, including the design of cast-iron bridges. For a time, he was employed on the sewerage system of Boston. Herschel was influenced by James B. Francis, who was the agent and engineer of the Proprietors of Locks and Canals on the Merrimack River at Lowell, Massachusetts, to switch his career path to hydraulic engineering. About 1880, he started working for the Holyoke Water Power Company in Massachusetts. He remained with the company until 1889. While he was there, Herschel designed the Holyoke testing flume, which has been said to mark the beginning of the scientific design of water-power wheels. Herschel first tested his Venturi meter concept in 1886 while working for the company. The original purpose of the Venturi meter was to measure the amount of water used by the individual water mills in the Holyoke area.

Water supply development in northern New Jersey was an active area of investment in the late 19th century. In 1889, Herschel was hired as the manager and superintendent of the East Jersey Water Company, where he worked until 1900. He was responsible for the development of the Pequannock River water supply for Newark. He also installed two of his largest Venturi meters at Little Falls, New Jersey, on the main stem of the Rockaway River to serve Paterson, Clifton and Jersey City.

After 1900 and lasting until the end of his life, Herschel was a consulting hydraulic engineer with offices in New York City. He worked on some of the major water development projects in the world. He played a major part in the construction of the hydroelectric power plant at Niagara Falls, which was the first large-scale electric power plant. He was appointed to an expert committee that reviewed the plans for the first water tunnel that would deliver water from the Catskill reservoirs to New York City.

Herschel was one of the first five men inducted into the American Water Works Association Water Industry Hall of Fame. He was also made an honorary member of that organization. Herschel was awarded the Elliott Cresson medal in 1889 by the Franklin Institute for his development of the Venturi water meter.

In 1888, Herschel was presented with the Thomas Fitch Rowland Prize by the American Society of Civil Engineers. The Rowland Prize is awarded to an author whose paper describes in detail accomplished works of construction or which are valuable contributions to construction management and construction engineering. He was made an Honorary Member of ASCE in 1922.

The Clemens Herschel Prize was established at Harvard University in 1929. The award is given to meritorious students in practical hydraulics. Each year, the Boston Society of Civil Engineers Section presents the Clemens Herschel Award to authors ‘…who have published papers that have been useful, commendable, and worthy of grateful acknowledgment.’”

Commentary:  I am particularly pleased with this biography, which I wrote for Wikipedia. On December 23, 2012, Wikipedia chose the Clemens Herschel biography to feature on their main page in the Did You Know section.

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January 5, 2015: History of Raleigh’s Water; 2006: Long Term 2 ESWTR

January 5, 2015:  Article published on theHistory of Raleigh’s Water. “Raleigh’s first go at creating water infrastructure was in the early 1800s when only about 1,000 residents called the city home. In 1818 the city built a water wheel in the Rocky Branch creek, which pumped water through wooden pipes to a water tower.

“Think barrels,” wrote Huler in a follow-up email. “Staves held together by wire, wound around almost like a spring.”

Unfortunately, Raleigh’s first try at a citywide system was, to put it bluntly, a total disaster. The mud and silt that accompanied the water caused the pipes to burst and within a few years the city returned to wells and pumps.

In the mid 1880s, with the population at a booming 10,000 people, Raleigh decided to give it another try. In 1886 the city built a real pump, just south of downtown, pulling water from Walnut Creek. The steam-powered water treatment plant filtered 2 million gallons per day sending the water to a reservoir and then to a 100,000-gallon water tower that still stands downtown.

By 1910 Raleigh had 55 miles of water mains running beneath the streets.”

Cryptosporidium parvum

January 5, 2006:  Long Term 2 Enhanced Surface Water Treatment Rulefinalized by USEPA. “The purpose of the LT2 rule is to reduce illness linked with the contaminant Cryptosporidiumand other disease-causing microorganisms in drinking water. The rule will supplement existing regulations by targeting additional Cryptosporidiumtreatment requirements to higher risk systems. This rule also contains provisions to reduce risks from uncovered finished water reservoirs and to ensure that systems maintain microbial protection when they take steps to decrease the formation of disinfection byproducts that result from chemical water treatment….The final rule is effective on March 6, 2006.”

Commentary:  This regulation was a critical component of the Reg Neg and FACA negotiations that I participated in from 1992 to 2000. Utilities were given a number of years to develop compliance plans to meet this relatively complex drinking water regulation.

March 1, 1993: Milwaukee Crypto Outbreak; 1930: Death of Clemens Herschel

Depiction of Cryptosporidium parvum oocysts excystation in the gut

March 1, 1993:  Outbreak of cryptosporidiosis in Milwaukee, WI. From this date until April 28 is generally regarded as the duration of the outbreak of the disease.  People in the area receiving the water began getting sick during this period and soon emergency rooms and doctors’ offices were overtaxed.  It has been estimated that over 400,000 people were sickened and over 100 people died.

“To assess the total medical costs and productivity losses associated with the 1993 waterborne outbreak of cryptosporidiosis in Milwaukee, Wisconsin, including the average cost per person with mild, moderate, and severe illness, we conducted a retrospective cost-of-illness analysis using data from 11 hospitals in the greater Milwaukee area and epidemiologic data collected during the outbreak. The total cost of outbreak-associated illness was $96.2 million: $31.7 million in medical costs and $64.6 million in productivity losses. The average total costs for persons with mild, moderate, and severe illness were $116, $475, and $7,808, respectively. The potentially high cost of waterborne disease outbreaks should be considered in economic decisions regarding the safety of public drinking water supplies.”

Reference:  Corso, P.S. et al. 2003. “Cost of Illness in the 1993 Waterborne Cryptosporidium Outbreak, Milwaukee, Wisconsin.” Emerging Infectious Diseases. 9:4.

Commentary:  Based on the evidence I have seen, the Howard Avenue Water Purification Plant lost control of its particle removal process, which caused high concentrations of viable Cryptosporidium parvum oocysts to enter the distribution system. The only disinfectant that the water utility was using at that time was free chlorine, which is ineffective for killing this pathogen. Since the outbreak, the water treatment system in Milwaukee has been significantly upgraded. http://bit.ly/YPPGdK

March 1, 1930:  Clemens Herschel dies. “Clemens Herschel (March 23, 1842 – March 1, 1930) was an American hydraulic engineer. His career extended from about 1860 to 1930, and he is best known for developing the Venturi meter, which was the first large-scale, accurate device for measuring water flow.

Clemens was born in Boston, Massachusetts, and spent most of his life practicing his profession in New York and New Jersey. He attended Harvard University, where he received his bachelor of science degree in 1860 from the Lawrence Scientific School. After Harvard, he completed post-graduate studies in France and Germany.

The first part of Herschel’s career was devoted to bridge design, including the design of cast-iron bridges. For a time, he was employed on the sewerage system of Boston. Herschel was influenced by James B. Francis, who was the agent and engineer of the Proprietors of Locks and Canals on the Merrimack River at Lowell, Massachusetts, to switch his career path to hydraulic engineering. About 1880, he started working for the Holyoke Water Power Company in Massachusetts. He remained with the company until 1889. While he was there, Herschel designed the Holyoke testing flume, which has been said to mark the beginning of the scientific design of water-power wheels. Herschel first tested his Venturi meter concept in 1886 while working for the company. The original purpose of the Venturi meter was to measure the amount of water used by the individual water mills in the Holyoke area.

Water supply development in northern New Jersey was an active area of investment in the late 19th century. In 1889, Herschel was hired as the manager and superintendent of the East Jersey Water Company, where he worked until 1900. He was responsible for the development of the Pequannock River water supply for Newark. He also installed two of his largest Venturi meters at Little Falls, New Jersey, on the main stem of the Rockaway River to serve Paterson, Clifton and Jersey City.

After 1900 and lasting until the end of his life, Herschel was a consulting hydraulic engineer with offices in New York City. He worked on some of the major water development projects in the world. He played a major part in the construction of the hydroelectric power plant at Niagara Falls, which was the first large-scale electric power plant. He was appointed to an expert committee that reviewed the plans for the first water tunnel that would deliver water from the Catskill reservoirs to New York City.

Herschel was one of the first five men inducted into the American Water Works Association Water Industry Hall of Fame. He was also made an honorary member of that organization. Herschel was awarded the Elliott Cresson medal in 1889 by the Franklin Institute for his development of the Venturi water meter.

In 1888, Herschel was presented with the Thomas Fitch Rowland Prize by the American Society of Civil Engineers. The Rowland Prize is awarded to an author whose paper describes in detail accomplished works of construction or which are valuable contributions to construction management and construction engineering. He was made an Honorary Member of ASCE in 1922.

The Clemens Herschel Prize was established at Harvard University in 1929. The award is given to meritorious students in practical hydraulics. Each year, the Boston Society of Civil Engineers Section presents the Clemens Herschel Award to authors ‘…who have published papers that have been useful, commendable, and worthy of grateful acknowledgment.’”

Commentary:  I am particularly pleased with this biography, which I wrote for Wikipedia. On December 23, 2012, Wikipedia chose the Clemens Herschel biography to feature on their main page in the Did You Know section.

 

#TDIWH—January 5, 2015: History of Raleigh’s Water; 2006: Long Term 2 ESWTR

January 5, 2015:  Article published on the History of Raleigh’s Water. “Raleigh’s first go at creating water infrastructure was in the early 1800s when only about 1,000 residents called the city home. In 1818 the city built a water wheel in the Rocky Branch creek, which pumped water through wooden pipes to a water tower.

“Think barrels,” wrote Huler in a follow-up email. “Staves held together by wire, wound around almost like a spring.”

Unfortunately, Raleigh’s first try at a citywide system was, to put it bluntly, a total disaster. The mud and silt that accompanied the water caused the pipes to burst and within a few years the city returned to wells and pumps.

In the mid 1880s, with the population at a booming 10,000 people, Raleigh decided to give it another try. In 1886 the city built a real pump, just south of downtown, pulling water from Walnut Creek. The steam-powered water treatment plant filtered 2 million gallons per day sending the water to a reservoir and then to a 100,000-gallon water tower that still stands downtown.

By 1910 Raleigh had 55 miles of water mains running beneath the streets.”

Cryptosporidium parvum

January 5, 2006:  Long Term 2 Enhanced Surface Water Treatment Rule finalized by USEPA. “The purpose of the LT2 rule is to reduce illness linked with the contaminant Cryptosporidium and other disease-causing microorganisms in drinking water. The rule will supplement existing regulations by targeting additional Cryptosporidium treatment requirements to higher risk systems. This rule also contains provisions to reduce risks from uncovered finished water reservoirs and to ensure that systems maintain microbial protection when they take steps to decrease the formation of disinfection byproducts that result from chemical water treatment….The final rule is effective on March 6, 2006.”

Commentary:  This regulation was a critical component of the Reg Neg and FACA negotiations that I participated in from 1992 to 2000. Utilities were given a number of years to develop compliance plans to meet this relatively complex drinking water regulation.

March 1, 1993: Milwaukee Crypto Outbreak; 1930: Death of Clemens Herschel

Depiction of Cryptosporidium parvum oocysts excystation in the gut

Depiction of Cryptosporidium parvum oocysts excystation in the gut

March 1, 1993: Outbreak of cryptosporidiosis in Milwaukee, WI. From this date until April 28 is generally regarded as the duration of the outbreak of the disease. People in the area receiving the water began getting sick during this period and soon emergency rooms and doctors’ offices were overtaxed. It has been estimated that over 400,000 people were sickened and over 100 people died.

“To assess the total medical costs and productivity losses associated with the 1993 waterborne outbreak of cryptosporidiosis in Milwaukee, Wisconsin, including the average cost per person with mild, moderate, and severe illness, we conducted a retrospective cost-of-illness analysis using data from 11 hospitals in the greater Milwaukee area and epidemiologic data collected during the outbreak. The total cost of outbreak-associated illness was $96.2 million: $31.7 million in medical costs and $64.6 million in productivity losses. The average total costs for persons with mild, moderate, and severe illness were $116, $475, and $7,808, respectively. The potentially high cost of waterborne disease outbreaks should be considered in economic decisions regarding the safety of public drinking water supplies.”

Reference: Corso, P.S. et al. 2003. “Cost of Illness in the 1993 Waterborne Cryptosporidium Outbreak, Milwaukee, Wisconsin.” Emerging Infectious Diseases. 9:4.

Commentary: Based on the evidence I have seen, the Howard Avenue Water Purification Plant lost control of its particle removal process, which caused high concentrations of viable Cryptosporidium parvum oocysts to enter the distribution system. The only disinfectant that the water utility was using at that time was free chlorine, which is ineffective for killing this pathogen. Since the outbreak, the water treatment system in Milwaukee has been significantly upgraded. http://bit.ly/YPPGdK

Clemens Herschel 1906March 1, 1930: Clemens Herschel dies. “Clemens Herschel (March 23, 1842 – March 1, 1930) was an American hydraulic engineer. His career extended from about 1860 to 1930, and he is best known for developing the Venturi meter, which was the first large-scale, accurate device for measuring water flow.

Clemens was born in Boston, Massachusetts, and spent most of his life practicing his profession in New York and New Jersey. He attended Harvard University, where he received his bachelor of science degree in 1860 from the Lawrence Scientific School. After Harvard, he completed post-graduate studies in France and Germany.

The first part of Herschel’s career was devoted to bridge design, including the design of cast-iron bridges. For a time, he was employed on the sewerage system of Boston. Herschel was influenced by James B. Francis, who was the agent and engineer of the Proprietors of Locks and Canals on the Merrimack River at Lowell, Massachusetts, to switch his career path to hydraulic engineering. About 1880, he started working for the Holyoke Water Power Company in Massachusetts. He remained with the company until 1889. While he was there, Herschel designed the Holyoke testing flume, which has been said to mark the beginning of the scientific design of water-power wheels. Herschel first tested his Venturi meter concept in 1886 while working for the company. The original purpose of the Venturi meter was to measure the amount of water used by the individual water mills in the Holyoke area.

Water supply development in northern New Jersey was an active area of investment in the late 19th century. In 1889, Herschel was hired as the manager and superintendent of the East Jersey Water Company, where he worked until 1900. He was responsible for the development of the Pequannock River water supply for Newark. He also installed two of his largest Venturi meters at Little Falls, New Jersey, on the main stem of the Rockaway River to serve Paterson, Clifton and Jersey City.

After 1900 and lasting until the end of his life, Herschel was a consulting hydraulic engineer with offices in New York City. He worked on some of the major water development projects in the world. He played a major part in the construction of the hydroelectric power plant at Niagara Falls, which was the first large-scale electric power plant. He was appointed to an expert committee that reviewed the plans for the first water tunnel that would deliver water from the Catskill reservoirs to New York City.

Herschel was one of the first five men inducted into the American Water Works Association Water Industry Hall of Fame. He was also made an honorary member of that organization. Herschel was awarded the Elliott Cresson medal in 1889 by the Franklin Institute for his development of the Venturi water meter.

In 1888, Herschel was presented with the Thomas Fitch Rowland Prize by the American Society of Civil Engineers. The Rowland Prize is awarded to an author whose paper describes in detail accomplished works of construction or which are valuable contributions to construction management and construction engineering. He was made an Honorary Member of ASCE in 1922.

The Clemens Herschel Prize was established at Harvard University in 1929. The award is given to meritorious students in practical hydraulics. Each year, the Boston Society of Civil Engineers Section presents the Clemens Herschel Award to authors ‘…who have published papers that have been useful, commendable, and worthy of grateful acknowledgment.’”

Commentary: I am particularly pleased with this biography, which I wrote for Wikipedia. On December 23, 2012, Wikipedia chose the Clemens Herschel biography to feature on their main page in the Did You Know section.

#TDIWH—January 5, 2015: History of Raleigh’s Water; 2006: Long Term 2 ESWTR

0105 EB-Bain-Plant_State-ArchivesJanuary 5, 2015: Article published on the History of Raleigh’s Water. “Raleigh’s first go at creating water infrastructure was in the early 1800s when only about 1,000 residents called the city home. In 1818 the city built a water wheel in the Rocky Branch creek, which pumped water through wooden pipes to a water tower.

“Think barrels,” wrote Huler in a follow-up email. “Staves held together by wire, wound around almost like a spring.”

Unfortunately, Raleigh’s first try at a citywide system was, to put it bluntly, a total disaster. The mud and silt that accompanied the water caused the pipes to burst and within a few years the city returned to wells and pumps.

0105 Water-Resevoir_state-archives-771x612In the mid 1880s, with the population at a booming 10,000 people, Raleigh decided to give it another try. In 1886 the city built a real pump, just south of downtown, pulling water from Walnut Creek. The steam-powered water treatment plant filtered 2 million gallons per day sending the water to a reservoir and then to a 100,000-gallon water tower that still stands downtown.

By 1910 Raleigh had 55 miles of water mains running beneath the streets.”

Cryptosporidium parvum

Cryptosporidium parvum

January 5, 2006: Long Term 2 Enhanced Surface Water Treatment Rule finalized by USEPA. “The purpose of the LT2 rule is to reduce illness linked with the contaminant Cryptosporidium and other disease-causing microorganisms in drinking water. The rule will supplement existing regulations by targeting additional Cryptosporidium treatment requirements to higher risk systems. This rule also contains provisions to reduce risks from uncovered finished water reservoirs and to ensure that systems maintain microbial protection when they take steps to decrease the formation of disinfection byproducts that result from chemical water treatment….The final rule is effective on March 6, 2006.”

Commentary: This regulation was a critical component of the Reg Neg and FACA negotiations that I participated in from 1992 to 2000. Utilities were given a number of years to develop compliance plans to meet this relatively complex drinking water regulation.

#TDIWH—January 5, 2015: History of Raleigh’s Water; 2006: Long Term 2 ESWTR

0105 EB-Bain-Plant_State-ArchivesJanuary 5, 2015: Article published on the History of Raleigh’s Water. “Raleigh’s first go at creating water infrastructure was in the early 1800s when only about 1,000 residents called the city home. In 1818 the city built a water wheel in the Rocky Branch creek, which pumped water through wooden pipes to a water tower.

“Think barrels,” wrote Huler in a follow-up email. “Staves held together by wire, wound around almost like a spring.”

Unfortunately, Raleigh’s first try at a citywide system was, to put it bluntly, a total disaster. The mud and silt that accompanied the water caused the pipes to burst and within a few years the city returned to wells and pumps.

In the mid 1880s, with the population at a booming 10,000 people, Raleigh decided to give it another try. In 1886 the city built a real pump, just south of downtown, pulling water from Walnut Creek. The steam-powered water treatment plant filtered 2 million gallons per day sending the water to a reservoir and then to a 100,000-gallon water tower that still stands downtown.

By 1910 Raleigh had 55 miles of water mains running beneath the streets.”

Cryptosporidium parvum

Cryptosporidium parvum

January 5, 2006: Long Term 2 Enhanced Surface Water Treatment Rule finalized by USEPA. “The purpose of the LT2 rule is to reduce illness linked with the contaminant Cryptosporidium and other disease-causing microorganisms in drinking water. The rule will supplement existing regulations by targeting additional Cryptosporidium treatment requirements to higher risk systems. This rule also contains provisions to reduce risks from uncovered finished water reservoirs and to ensure that systems maintain microbial protection when they take steps to decrease the formation of disinfection byproducts that result from chemical water treatment….The final rule is effective on March 6, 2006.”

Commentary: This regulation was a critical component of the Reg Neg and FACA negotiations that I participated in from 1992 to 2000. Utilities were given a number of years to develop compliance plans to meet this relatively complex drinking water regulation.