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Home My WebLink AboutWater Main Flusing Procedure11/21/2006 TUE 11:50 FAX how I f a. fl C 0 N S T R 11 -1; '1` X A010 November 7, 2006 Vail Plaza Hotel Water Main Flushing Procedure Objective: Produce sufficient flow to ensure removal of any foreign debris from water main piping Length of Piping: approx. 28' of 10" DIP exterior, 35' of interior 10 ". Volume of water in piping approx. 270 gals. Flushing shall be done in accordance with NFPA 13 / Chapter 10. The means of flushing shall be done in general compliance with Figure A.10.10.2.1, utilizing the fire protection system's FDC piping with check valves removed and balance of system disconnected from the piping being used to flush the underground piping. Flow rate to be a minimum of 2,440 gpm as required to produce a velocity of 10 ft/sec (Table 10:10.2.1.3). Rate to be verified using a pitot guage registering a pressure differential of 5 psi, reference All State email of Oct. 12, 2006 attached. The water main bacterial test was performed on 9/7/05, pressure tested on 9/9/05 by Gould Construction, witnessed by Chuck C ERWSD , see attached, and flushed into our excavation. Therefore the water which will be used now to flush the piping is Eagle River Water Systems, which per Fred Haslee, has a residual chlorine content of 0.9 to 1.2 mg /1. Shaw Construction proposes to dispose of our flush water via the following method: Run 6" discharge pipe from approx. FDC connection to the S. Frontage Road curb flow line. Discharge water using a 90 degree elbow, turned approx. 20 degrees above horizontal, from the inlet location at the west side of loading dock entry to the east. By aerating the water via splashing and allowing to run back down the curb line to our storm drain line along Frontage Road which is connected to the Spraddle Creek drainage, the residual chlorine will be reduced to acceptable levels. During the flush test, Shaw Construction proposes to close the south lane of traffic on S. Frontage Road in accordance with the attached traffic control plan. Test will only be conducted if the ambient temperature is above 40 degrees. 300 Kalamath St. 303.825.4740 Denver, CO 80220 Fax 303.825.6403 lij 002/014 11/21/2006 TUE 11:50 FAX 426 NFPA 13 /Chapter 10 - Underuround Piping EXHIBIT 10,4 Object Trapped in a Dry Pipe Sprinkler System.. a 003/014 Wye or Siamese connection with clappers removed 4-in. (102•mcn) steel Reducing ell 6 in (152 mm) x � �d° during flu operation Approved Indicating valve Remove cis Install a pl ing slushing ug or a nipple and cap and flush underground before overhead piping t connected M14 Approved indicating valve ? o Grade From underground Water can be discharged through open end of 4-1n. (102 -mm) pipe or through Y or Siamese connection with hose as shown above Fire o ... •. oar iment Grade check s valve From underground Employing fire department connections FIGUREA10- 10.2.I Methods of Flushing Water Supply Connections move upward in piping if the water stream velocity is 5 64 ft/se; (172 m/sec) In the 1991 edition of NFPA 13, the flow rates were increased to reflect velocities of 10 ft/sec (3.1 m/sec) :r { because this number is more in line with requirements of other accepted standards The veloc- ity of 10 ft/sec (3.1 m/mc) is also in agreement with the flushing requirements of NFPA 15, Standard for Watet Spray F"raed Systems for Fire Proterdon. TABLE I0.I0,21-3 Flow Required to Produce a Velocity of 10 fiYsec (3 m/sec) in Pipes Pipe Size Flow Rate in. tnm gpm Lhnin 4 102 390 1,476 6 152 880 3,331 8 203 1,560 5,905 10 254 2,440 9.235 12 305 3,520 13,323 2002 Automatic Sprinkler Systems Handbook Approved indicating valve ? o Grade From underground Water can be discharged through open end of 4-1n. (102 -mm) pipe or through Y or Siamese connection with hose as shown above Fire o ... •. oar iment Grade check s valve From underground Employing fire department connections FIGUREA10- 10.2.I Methods of Flushing Water Supply Connections move upward in piping if the water stream velocity is 5 64 ft/se; (172 m/sec) In the 1991 edition of NFPA 13, the flow rates were increased to reflect velocities of 10 ft/sec (3.1 m/sec) :r { because this number is more in line with requirements of other accepted standards The veloc- ity of 10 ft/sec (3.1 m/mc) is also in agreement with the flushing requirements of NFPA 15, Standard for Watet Spray F"raed Systems for Fire Proterdon. TABLE I0.I0,21-3 Flow Required to Produce a Velocity of 10 fiYsec (3 m/sec) in Pipes Pipe Size Flow Rate in. tnm gpm Lhnin 4 102 390 1,476 6 152 880 3,331 8 203 1,560 5,905 10 254 2,440 9.235 12 305 3,520 13,323 2002 Automatic Sprinkler Systems Handbook 2002 Automatic Sprinkler Systems Handbook 11/21/2006 TUE 11:51 FAX SHAW e 3214 Katsos Ranch Road Vail, CO 81657 Phone: 970477 -1216 Fax: 970477 -1215 DAVE: _ 9 - 7 - o s DAY: w ej . JOB: Uc' COMPETENT PERSON (S): Subcontractor Daily Status Report COMPANY NAME: Daily Activities: G 4'// 1h5E , :.-+4J/ C.k i-k Q,ve,r ;s EQUIPMENT AND /OR MATERIALS: Description Source Unit Type Work Area Remarks 9004/014 33:). C--Id Q T� LABOR FORCE: Supv. Frmn. Jrny. Apps°. Work Area Remarks 11/21/2006 TUE 11:51 FAX 1 HAW � 3214 Katsos Ranch Road Vail, CO 81657 Phone: 970477 -1216 Fax: 970477 -1215 P5.5 � DATE: _�'- re- �sd� DAY: 1 JOB: COMPETENT PERSON (S): Subcontractor Daily Status Report COMPANY NAME: (:�L Daily Activities:' 4� ( Jr1e� f San � -741 1;10a 4re CCSSCclZ" 7�57C�iC i -fa�2 — 2C�OS3' /P�cc�� EQUIPMENT AND /OR MATERIALS: Description Source Unit Type Work Area LABOR FORCE: Supv. Frmn. Jfrny. Appr. Work Area Sam. Remarks Remarks 9005/014 4 /-�ICS