BOULDER’S WATERWORKS

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een able to reach its full capacity. This would change if the reconstructed Betasso Penstock had a larger diameter and smooth interior lining. • Problem 2 -- Deteriorated Orodell Pipeline The Orodell Pipeline carries treated water down the hill from Betasso Water Treatment Plant into the City. Sections of the Orodell Pipeline installed in the 1950s were rusting through, requiring emergency repairs. The possibility of reconstructing the Betasso and Orodell pipelines at the same time presented an opportunity to fix yet a third problem. The Boulder Canyon Hydro Plant is viewed from the Betasso Water Treatment Plant, over the revegetated Betasso Penstock. Pettem photo, 2013 126
Problem 3 – Discharging water back to the creek from Betasso The City had no way to discharge water from the Betasso facilities back to Boulder Creek when it would help with operations at the treatment plant or the hydro plants. Sometimes overflow releases were made into a nearby gulch when no other option was available to address treatment concerns. In addition, the City was limited in its ability to increase revenue from Betasso Hydro since part of the power sales payment is based on monthly hydro capacity tests. Large amounts of water run through the turbine during these tests had to be delivered into the treatment plant, where it disrupted treatment processes. Therefore, hydro capacity tests were often run at reduced levels that decreased revenue. What was needed was a discharge line to carry overflows and capacity test water surges back to Boulder Creek. A creative solution addressing all of the problems was the installation of a new larger pipeline to replace the Betasso Penstock, then re-plumbing the existing Betasso Penstock to become a new Orodell Pipeline, and then re-using the existing Orodell Pipeline as a discharge line during capacity tests and for overflows. The increase in future hydropower sales will pay for the construction that began in 2008 and was completed in 2010. 221 Approximately 3,400 feet of 20-to-33-inch-diameter steel pipe was installed, along with new pressure-reducing valves for use when the hydros aren't operating. 222 The Betasso Water Treatment Plant. Pettem photo, 2013 127
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BOULDER’S WATERWORKS PAST & PRESE
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BOULDER’S WATERWORKS -- PAST & PR
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• Water System Security Improveme
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INTRODUCTION The story of Boulder
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SETTLEMENT& DITCHES Boulder City To
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1859, they dug small ditches from B
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“Shovel diplomacy,” however, di
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state senator. In January 1873, the
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PUBLIC WATERWORKS & PROBLEMS • 18
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Above, the Town of Boulder Reservoi
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BOULDER’S EARLY WATERWORKS PRESEN
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Ditch laterals paralleled 12th Stre
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A few weeks later, the City Council
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Silver Lake Ditch had five wooden f
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NEED FOR NEW RESERVOIRS • 1891, O
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Continued population growth in Boul
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In Boulder, laborers replaced pipes
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INTO THE 20TH CENTURY Discovery of
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In 1904, glacier hikers even includ
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The Maxwells also made a similar pr
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LAKEWOOD, LAKEWOOD RESERVOIR & TUNS
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In addition, the City acquired ease
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The Act that conveyed the first gra
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BOULDER HYDRO SYSTEM, 1910 The twen
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The dam was photographed on April 1
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producing 5,000 kilowatts (KW) of p
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On August 4, 1910, a ceremony was h
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This drawing of the original two ge
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ADDITIONAL WATERSHED DEVELOPMENTS A
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Silver Lake Pipeline In the years p
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pieces, are we justified in denying
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The WPA built much of Boulder’s w
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mission lines which, in places, has
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older clay tile pipe on the pipelin
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NEW WATER SUPPLIES & GROWTH, 1950s-
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One of the surge chambers for the p
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At this time, Boulder was beginning
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The City entered into an agreement
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Beginning in 1947, CBT Project wate
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The next water rights used to fill
Page 81 and 82: Atmospheric Research’s proposed b
Page 83 and 84: BETASSO WATER TREATMENT PLANT, 1964
Page 85 and 86: A new raw water pipeline was constr
Page 87 and 88: In 1976, the Betasso Water Treatmen
Page 89 and 90: 83
Page 91 and 92: BOULDER RESERVOIR WATER TREATMENT P
Page 93 and 94: Throughout the 1970s, employees of
Page 95 and 96: WATER AND POWER FOR THE FUTURE, 198
Page 97 and 98: In 1989, roller-compacted concrete
Page 99 and 100: pressure zone into the lower zone.
Page 101 and 102: costs would rise to $999,000. Hartm
Page 103 and 104: DEVELOPMENTS IN THE 1990s From the
Page 105 and 106: Reconstruction of Silver Lake Pipel
Page 107 and 108: water shortages should occur. The c
Page 109 and 110: Water Treatment Plant improvements
Page 111 and 112: The dispute escalated when the City
Page 113 and 114: TWENTY-FIRST-CENTURY PROGRESS As th
Page 115 and 116: Meanwhile, the City wanted to gain
Page 117 and 118: Repair of the Barker Gravity Line F
Page 119 and 120: Lakewood Pipeline reconstruction Bu
Page 121 and 122: struction of the Lakewood Pipeline
Page 123 and 124: the pipe manufacturer for enough mo
Page 125 and 126: sions, City staff surprised themsel
Page 127 and 128: Dealing with Drought In April 2002,
Page 129 and 130: PREPARING FOR THE FUTURE Boulder is
Page 131: Boulder Feeder Canal, and that was
Page 135 and 136: Above, a new generator and turbine,
Page 137 and 138: The Feeder Canal would require repa
Page 139 and 140: APPENDIX Recent Water Utilities Wor
Page 141 and 142: ENDNOTES 1 The word “Arapaho” c
Page 143 and 144: 35 Daily Camera, October 20, 1891.
Page 145 and 146: 71 Deed between The Cashier Mining
Page 147 and 148: Supply, April 2009, pages 3-10. 104
Page 149 and 150: 135 Preliminary Design Memorandum,
Page 151 and 152: 167 The Windy Gap Project, Municipa
Page 153 and 154: 198 City of Boulder Utilities Repor
Page 155 and 156: 149
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BOULDER’S WATERWORKS

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