Engineering Standards 15Th Edition | Denver Water
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Engineering Standards 15th Edition June 2018 The enclosed Standards contain the Fifteenth Edition of the Engineering Standards of the Board of Water Commissioners, Denver, Colorado, and shall be binding and in full force and effect as of June 2018. This 15th Edition of the Denver Water’s Engineering Standards establishes standard requirements for constructing Denver Water’s transmission and distribution projects and includes Engineering Standards, Material Specifications, and Standard Details. Denver Water is not responsible for the use of all or any portion of this document by any other public agency or private entity. No representation or warranty of any kind is made concerning the accuracy, completeness, suitability, or utility of any information or product referenced in this document, and Denver Water assumes no liability arising from such use. ENGINEERING STANDARDS 15TH EDITION EFFECTIVE MAY 2020 ERRATA 3 MEMORANDUM To: Denver Water Engineering Standards Users From: Katie L. Ross, P.E. – Distribution Engineering Manager CC: Robert J. Mahoney, P.E. – Chief Engineering Officer Jeremy M. Ross, P.E. – Director of Engineering – Projects Date: May 29, 2020 RE: Denver Water Engineering Standards – 15th Edition Errata 3 - Notice of Corrections Revisions to the 15th Edition of the Engineering Standards are hereby published for immediate use. CHAPTER 7 – EARTHWORK, SUBPARAGRAPH 7.10, SUBPARAGRAPH A, FIRST PARAGRAPH, SECOND SENTENCE, PAGE 79: DELETE: Bell holes shall be dug deep enough to provide 2-inches of clearance between the bell and bedding material. SUBSTITUTE: Bell holes shall be dug deep enough to provide 6-inches of clearance between the bell and subgrade. CHAPTER 7 – EARTHWORK, SUBPARAGRAPH 7.10, SUBPARAGRAPH B, PAGE 79: DELETE: Bedding and pipe zone material shall be clean, free draining, poorly graded, unfrozen, non-friable, natural rounded (not crushed) squeegee with no clay balls or organic material that is in accordance with the following limits when tested by means of laboratory sieves: SUBSTITUTE: Bedding and pipe zone material shall be clean, free draining, poorly graded, unfrozen, non-friable, rounded (not crushed) squeegee with no clay balls or organic material. Expanded clay Lightweight Aggregate is acceptable with a max LA abrasion of 30%. Material shall be in accordance with the following limits when tested by means of laboratory sieves: Denver Water Engineering Standards – 15th Edition Errata 3 - Notice of Corrections May 29, 2020 Page 2 CHAPTER 7 – EARTHWORK, SUBPARAGRAPH 7.10, SUBPARAGRAPH B, TABLE, PAGE 80: DELETE: Squeegee (For use with 20-inch or smaller diameter mains) Total Percent Sieve Size Passing by Weight 3/8-inch 100 No. 50 0 to 10 No. 100 0 to 5 No. 200 0 to 3 SUBSTITUTE: Lightweight Squeegee (For use with 20-inch or smaller diameter mains) Total Percent Sieve Size Passing by Weight 3/8-inch 100 No. 50 0 to 30 No. 100 0 to 10 No. 200 0 to 5 The following Material Specifications are hereby corrected and updated: MATERIAL SPECIFICATION – 5 FOR RESILIENT SEATED GATE VALVES, SUBPARAGRAPH 5, PAGE 1 DELETE: VALVES INSTALLED IN THE RECYCLED WATER SYSTEM SHALL HAVE EPDM SEATS. INSTALLATION SUBSTITUTE: INSTALLATION Denver Water Engineering Standards – 15th Edition Errata 3 - Notice of Corrections May 29, 2020 Page 3 MATERIAL SPECIFICATION – 23 FOR BRASS AND BRONZE GOODS, SUBPARAGRAPH 2, SECOND TABLE, PAGE 1: DELETE: NL MATERIAL SPECIFICATION – 23 FOR BRASS AND BRONZE GOODS, SUBPARAGRAPH 3, TABLE, PAGE 2: DELETE: 720-B612WWxx 660 SUBSTITUTE: 720-B612WWxx 666 MATERIAL SPECIFICATION – 23 FOR BRASS AND BRONZE GOODS, SUBPARAGRAPH 3, TABLE, PAGE 2: DELETE: 720-B712WWxx 770 SUBSTITUTE: 720-B712WWxx 777 MATERIAL SPECIFICATION – 25 FOR METER PITS, DOMES, AND LIDS, SUBPARAGRAPH 2, SECOND PARAGRAPH, FIRST SENTENCE, PAGE 1: ADD: 42-inch or MATERIAL SPECIFICATION – 25 FOR METER PITS, DOMES, AND LIDS, SUBPARAGRAPH 2, SUBPARAGRAPH B, FIRST PARAGRAPH, PAGE 1: DELETE: Plastic meter pits shall be of a 1-piece design with a nominal 24-inch diameter by 42-inch high unit that tapers in 12-inches to accept a 20-inch diameter dome unit; or a 2-piece design with a nominal 24-inch diameter by 36-inch high base unit and a 12-inch top unit that tapers from a 24-inch diameter to accept a standard 20-inch diameter dome unit. The units shall be constructed of LMDP with a wall thickness of no less than 0.5-inches. SUBSTITUTE: Plastic meter pits shall be of a 1-piece design with a nominal 24-inch diameter by 42-inch high unit that tapers in 12-inches to accept a 20-inch diameter dome unit; or a 2-piece design with a nominal 24-inch diameter by 30-inch high base unit and a 12-inch or 18-inch top unit that tapers from a 24-inch diameter to accept a standard 20-inch diameter dome unit. The units shall be constructed of LMDP or high density polypropylene (HDPE) with a wall thickness of no less than 0.5-inches. Denver Water Engineering Standards – 15th Edition Errata 3 - Notice of Corrections May 29, 2020 Page 4 MATERIAL SPECIFICATION – 25 FOR METER PITS, DOMES, AND LIDS, SUBPARAGRAPH 4, FIRST TABLE, PAGE 2: DELETE: MMP2436 SUBSTITUTE: MMPE 2412 MATERIAL SPECIFICATION – 25 FOR METER PITS, DOMES, AND LIDS, SUBPARAGRAPH 4, FIRST TABLE, PAGE 2: ADD: 0020-42 Body B-W 2 MsHL – 24” Base (Bullet Style) The following Standard Drawings are hereby corrected and updated: SHEET 51 – 2” AND SMALLER NON-COPPER SERVICE LINE REPLACEMENT DELETE: Drawing in its entirety. SUBSTITUTE: Attached drawing. SHEET 52 – 2” AND SMALLER NON-COPPER SERVICE LINE REPLACEMENT & INSIDE METER RELOCATION, NOTE 5 DELETE: Drawing in its entirety. SUBSTITUTE: Attached drawing. SHEET 61 – INSIDE SETTING FOR 3” & LARGER METER, NOTE 2 DELETE: Drawing in its entirety. SUBSTITUTE: Attached drawing. Denver Water Engineering Standards – 15th Edition Errata 3 - Notice of Corrections May 29, 2020 Page 5 SHEET 63 – INSIDE BACKFLOW PREVENTION ASSEMBLY FOR OUTSIDE SETTING OF 1 1/2" & 2” METER & BYPASS MANHOLE DELETE: Drawing in its entirety. SUBSTITUTE: Attached drawing. SHEET 68 – IRRIGATION OUTSIDE SETTING FOR 2” & SMALLER REDUCED PRESSURE PRINCIPLE ASSEMBLY IN ENCLOSURE DELETE: Drawing in its entirety. SUBSTITUTE: Attached drawing. The administration of these Standards, including the interpretation, enforcement, revision, waiver, and variance thereof, is hereby delegated by the CEO/Manager to the Chief Engineering Officer or the Chief’s appointed representative. A variance request must be submitted to the Sales Administration Section and forwarded to the Chief Engineering Officer, or the Chief’s appointed representative, for review. A PDF version of the Errata 3 revisions can be found at: https://www.denverwater.org/contractors/construction-information/design-standards/engineering- standards\ Please contact Katie Ross at 303-628-6589 with any questions regarding these changes. End of Memorandum MEMORANDUM To: Denver Water Engineering Standards Users From: Katie L. Ross, P.E. – Distribution Engineering Manager CC: Robert J. Mahoney, P.E. – Chief Engineering Officer Jeremy M. Ross, P.E. – Director of Engineering – Projects Date: January 31, 2020 RE: Denver Water Engineering Standards – 15th Edition Errata 2 - Notice of Corrections Revisions to the 15th Edition of the Engineering Standards are hereby published for immediate use. ABBREVIATIONS – TECHNICAL SOCIETIES DELETE: Technical Societies SUBSTITUTE: Organizations ABBREVIATIONS – TECHNICAL SOCIETIES ADD: CDOT - Colorado Department of Transportation ADD: FAA – Federal Aviation Administration ABBREVIATIONS – GENERAL ABBREVIATIONS AND ACRONYMS DELETE: General Abbreviations and Acronyms SUBSTITUTE: Abbreviations and Acronyms ABBREVIATIONS – GENERAL ABBREVIATIONS AND ACRONYMS ADD: cm - Centimeters ADD: ppm – Parts Per Million Denver Water Engineering Standards – 15th Edition Errata 2 - Notice of Corrections January 31, 2020 Page 2 CHAPTER 1 – GENERAL, SUBPARAGRAPH 1.06, PAGE 4: ADD: Corrective Action: Risk assessment, active remediation, passive remediation, voluntary cleanup, investigation, and/or monitoring of environmental contamination. CHAPTER 1 – GENERAL, SUBPARAGRAPH 1.06, PAGE 5: ADD: Environmental Contamination: The presence of any hazardous material, including, but not limited to, any substances defined as or included in the definition of “hazardous substance,” “hazardous material” or “toxic substances” in the Comprehensive Environmental Response, Compensation, and Liability Act, 42 U.S.C. § 9601, et seq., the Hazardous Materials Transportation Act, 49 U.S.C. § 5101, et seq., the Resource Conservation and Recovery Act, 42 U.S.C. § 6901, et seq., or any other federal, state or local statute, law, ordinance, code, rule, regulation, order, decree or other requirement of governmental authority regulating, relating to or imposing liability or standard of conduct concerning any hazardous, toxic or dangerous substance or material, as now or at any time hereafter in effect, and in the regulations adopted, published, and/or promulgated pursuant to said laws. CHAPTER 1 – GENERAL, SUBPARAGRAPH 1.06, PAGE 7: DELETE: AMR SUBSTITUTE: AMR/AMI CHAPTER 2 – MAIN AND DISTRIBUTOR MAIN EXTENSIONS, SUBPARAGRAPH 2.05, SUBPARAGRAPH A, SECOND SENTENCE, PAGE 10: DELETE: CAD Standards Procedures Manual SUBSTITUTE: CAD Standards External Requirements CHAPTER 2 – MAIN AND DISTRIBUTOR MAIN EXTENSIONS, SUBPARAGRAPH 2.05, SUBPARAGRAPH A, SUBPARAGRAPH 11, FIRST BULLET, PAGE 10: DELETE: CAD Standards Procedures Manual SUBSTITUTE: CAD Standards External Requirements Denver Water Engineering Standards – 15th Edition Errata 2 - Notice of Corrections January