Denver Water Notes

1. All materials and workmanship shall be in conformance with the Denver Water Engineering Standards, Materials Specifications and Drawings. All main installations/system modifications shall be approved and inspected by Denver Water.

2. All water mains installed shall conform to Denver Water Materials Specifications:

Ductile Iron	—	ES 6.03, MS-1	4" & 20" Class 51/with Poly Wrap 6" through 16" Class 50/with Poly Wrap
Polyvinyl Chloride (PVC)	—	ES 6.03, MS-2	4" Class 200 6" through 12" Class 150

Note: All fire hydrant laterals and fire lines shall be Ductile Iron Pipe.

3. Mechanical joint restraint devices shall be:

For Ductile Iron Pipe:	For PVC Pipe:
MegaLug 1100 Series Romal ROM Grip Uni-Flange 1400 Series Star Grip 3000 Series Sigma-One Lock	MegaLug 2000 PV Series Sigma-One Lock Star

4. Pipe joint restraint devices shall be:

For Ductile Iron Pipe:	For PVC Pipe:
MegaLug 1700 Series	MegaLug 1500 PV Series
US Pipe Field Lok Gasket

5. Tracer wire, gauge 12, shall be installed on all non-metallic water mains.

6. All fittings shall be made from gray-iron or ductile iron and furnished with mechanical joint ends. All fittings shall have a pressure rating of 250 psi (MS-3) and shall be wrapped with an 8-mil minimum thickness polyethylene material (MS-13).

7. For all pipe installations, the depth of cover over the pipe measured from official street grade to the top of the pipe shall be a minimum of 4-½ feet and shall be known as the cover over the pipe. If difficulties arise when crossing interference and where specifically approved by Denver Water, deviations from 4-½ feet of cover will be permitted. Cover over the pipe shall be a minimum of 3 feet and a maximum of 10 feet.
Any changes in alignment and grade shall be authorized by Denver Water and shall be accomplished by the installation of additional fittings. Breaking of joints is permitted only when installing pipe on horizontal or vertical curves.

8. Fire hydrants shall conform to Denver Water MS-12 Materials Specifications. Fire hydrant assemblies shall include all pipe, fittings, valves, and materials necessary to install the hydrant.

9. The following fire hydrants and valve boxes shall be accepted for construction by Denver Water.

Fire Hydrants

A. Mueller Company-Centurion Model A-473.

B. American Flow Control/Waterous-Pacer Model WB-67-250.

C. United States Pipe and Foundry Company-Metropolitan 250 M-94.

The following may be utilized in Distributor Contract Areas.

a. Clow F-2545

b. Kennedy K-81D

c. Centurion 423

Valve Boxes

A. Tyler Screw–Type "C" Cast Iron valve Box Assembly Series 6860 With No. 160 Oval Base.

B. Olympic Foundry Inc. Model No. 450VB

C. Castings Inc. CI. 160B Oval Base

D. East Jordan Iron Works Series 8560

E. Star Pipe Model No. VBD160DMWW

F. Western States Pipe Model No. VBDEN

All valve boxes and fire hydrants will be adjusted to the final finished grade by the Contractor.

10. All bends, tees, fire hydrants, blow-offs, and plugs at dead-end mains shall be protected from thrust by using concrete thrust blocks per Denver Water Engineering Standards, Drawing 19.

11. Chlorination and Flushing: All water mains shall be installed and chlorinated per Section 8.24 of Denver Water's Engineering Standards. The lines shall be chlorinated in accordance with AWWA C-651, "Disinfecting Water Mains." The preferred method is to use sufficient chlorine tablets to produce a 25 mg/l solution. These tablets should be adhered to the top of the pipe with Permatex Clear R.T.V. Chlorination of 16 inch and larger pipe requires a chlorine slurry. The chlorination of any finished pipeline shall be completed prior to hydrostatic testing.

12. Hydrostatic Testing: All water mains shall be tested per the requirements of Section 8.25 of Denver Water’s Engineering Standards. All pipe shall be field pressure tested to a minimum of 150 psi. All testing shall be done in the presence of a Denver Water Inspector. Allowable leakage for each section of pipe between line valves shall not exceed the leakage rate set forth below.

Pipe Size Inside Diameter	Allowable Leakage Per 1,000 feet Gallons Per Hour
	DI	PVC
4-inch	.37	.33
6-inch	.55	.50
8-inch	.74	.66
12-inch	1.10	1.00
16-inch	1.47
20-inch	1.84

13. All valves are to be located on property line extensions except for tapping tees where an additional valve shall be placed on the tapping tee. Other valve locations may be required as shown on the plans.

14. When it is necessary to lower or raise water lines at storm drains and other utility crossings, a minimum clearance of one (1) foot shall be maintained between the outside of pipes.

15. The Contractor shall have in his possession at all times one (1) signed copy of the approved water plans.

16. Compaction of all trenches must be attained by the Contractor and the compaction test results submitted to Denver Water Construction Inspection Division.

17. Only one point of connection will be allowed until all testing of new installations is completed.

18. The Contractor is responsible for:

A. Notifying all customers possibly affected by outage of water during construction.

B. The Contractor shall obtain, at his expense, all applicable licenses, permits, bonds, etc. required for the main installation/system modification.

C. Contacting Denver Water’s Construction Engineering for Pre-construction Meeting and Inspection, 303-628-6627, at least 48 hours prior to commencing construction.

D. In case of an emergency after working hours, call Denver Water’s Westside Dispatcher at 303-628-6390.

Note: Be advised that occasionally valves in our system may be inoperable. On such occasions it may become necessary to back up an additional block for the shut out. It will then be necessary to make the additional notifications to give the affected customers the mandatory 24 hours advance notice. Also be advised that when valve maintenance is required, a delay of several days should be expected.

19. Prior to installation of water mains, road construction must have progressed to at least the "sub-grade" state. Sub-grade is defined as an elevation of no more than seven (7) inches below the finished street grade.

20. Before any taps are made from mains, application(s) for the taps must be received and approved by the Distributor and Denver Water.

21. Denver Water is to make all taps 2 inches and smaller.

22. Individual service line PRVs are required. (Use this note only when area pressure exceeds 80 psi.)

23. All meter and AMR locations shall be approved by Denver Water, except in Master Meter Districts. Contact Meter Inspection at 303-628-6706 before construction to verify acceptable meter locations.

A. An on site pre-construction meeting with Meter Inspection is required for all meters 1-1/2-inch and larger. Call Meter Inspection to schedule an appointment.

B. Service line and meter settings must meet all applicable Engineering Standards in effect at the time of the meter set or inspection. Relocation of tap may be required to avoid driveways, sidewalks and other obstructions constructed after the tap has been installed.

C. All meters for Inside Denver, Total Service, and Read and Bill Districts must be furnished with Automatic Meter Reading devices as specified by Denver Water. AMR devices will be installed by Denver Water at the time of the meter installation or inspection.

D. Meter pit and vault lids shall have a 7-inch diameter by ¾-inch deep recess with a 2-inch diameter hole to accommodate the pit-mounted AMR device. When remote AMR devices are required, a lid without recesses shall be used; contractor shall provide approved signal cable in conduit from the meter location to the AMR device location, and double-gang electrical junction box mounted as directed for AMR device mounting.

E. For indoor meter installations: submit to Meter Inspection (Fax: 303-628-6895) a sketch of the room where the meter will be installed showing all domestic and fire line piping prior to construction.

F. Inside Denver, all multi-family dwellings that have one tap, service line, and meter are required to sub-meter each individual unit (City Council Ordinance Number 576). Call the City and County of Denver's Chief Plumbing Inspector at 720-865-2625 for information.

24. A backflow prevention device approved by Denver Water is required on the treated water service line for:

A. All commercial and multi-family domestic taps.

B. Taps where there is a dual water supply on the premises. (If there is a dual supply, a Dual Water Supply Agreement must be signed and provided to Denver Water.)

C. Fire lines.

25. All combination fire line and domestic taps must be inspected and approved by Denver Water prior to the release of the water mains.

26. Denver Water personnel are not responsible for work site safety or compliance/enforcement of safety regulations and standards established by other agencies. All safety compliance/enforcement at the work site shall be the Contractor’s responsibility.

27. The Water Quality Control Division of The Colorado Department of Public Health and Environment (CDPHE) requires all water line contractors to possess a current Discharge Permit for discharges of chlorinated and process waters associated with the installation of new mains or conduits. Contact CDPHE Water Quality Control Division at 303-692-3539 for information on obtaining the required permit.

28. Irrigation of medians and other public landscaped areas less than 25 feet in width must be done in accordance with Denver Water Operating Rule 14.07 (Call DW Conservation Section at 303-628-6343 for information regarding irrigation systems)

a. For strips of land less than 6 feet in width – Spray irrigation shall be prohibited. Low-flow irrigation systems are required.

b. For strips of land between 6 feet and 15 feet in width – Only low flow irrigation, or spray irrigation using low-angle spray nozzles designed for the specific width to be irrigated shall be permitted. All spray heads must be pressure reducing and designed to prevent low head drainage.

c. For strips of land more than 15 feet in width – Only gear-driven rotors with low angle nozzles may be used to irrigate turf areas. Planting beds may be irrigated with low-flow or spray irrigation. All spray heads must be pressure reducing and designed to prevent low head drainage.

29. Beginning August 1, 2008, soil amendment will be required on every property requiring new water service. Meters will not be set without a soil inspection by Denver Water or designated personnel.