On-Call_Irrigation_Services.pdf

REQUEST FOR PROPOSALS

RFQ-25-012 - On-Call Irrigation Services

Submission Due Date

Tuesday, April 1, 2025 by 2:00 pm Mountain Time

Documents Prepared by:

Procurement & Contracts Division

On behalf of

Parks, Forestry & Open Space

Anticipated Key Dates

RFP Issued March 7, 2025

Question Acceptance Deadline March 17, 2025, 2:00pm

Proposals Due by April 1, 2025, 2:00pm

Anticipated Contract Execution April 30, 2025

Please read the entire document. Do not remove any pages. Do not contact the issuing department as this may result in disqualification. All communication is to be directed to the City’s Procurement Manager, Kelsey Carter, kcarter@ci.wheatridge.co.us

Late submissions will not be considered. Only submissions received to OpenGov eProcurement prior to the deadline will be considered.

Table Of Contents

1. Introduction, Background, Scope of Work

1.1. Introduction

1.2. Background

1.3. Scope of Work

2. Evaluation Criteria, Evaluation Process

2.1. Evaluation Process

2.2. Evaluation Criteria

3. Administrative and Offeror Information

3.1. Proposal Opening, Evaluation, and Award

3.2. Sales and Use Taxes

3.3. Proposer Qualifications

3.4. Right to Investigate

3.5. No Commitment by the City of Wheat Ridge

3.6. Proposal Representation

3.7. Anti-Collusion Clause

3.8. Insurance

3.9. Laws and Regulations

3.10. Federally Funded Projects

3.11. Accessibility

3.12. Subcontracting

3.13. Sales Prohibited/Conflict of Interest

3.14. Modification of Agreement

3.15. Cancellation

3.16. Equal Opportunity

3.17. Disadvantaged Business Enterprises

3.18. Common Language

3.19. Proprietary Information

3.20. Competitiveness and Integrity

3.21. Proposal Format

3.22. Proposal Rejection and/or Partial Acceptance

3.23. Governing Law

3.24. Escalation

3.25. Ownership of Contract Products

3.26. Funding

3.27. Independent Contractor

3.28. Employment of Labor

3.29. Due Diligence

3.30. Debriefing

3.31. Cooperative Procurement

3.32. Contractor Performance Feedback

3.33. Sample Agreement

3.34. Pricing Proposal

4. Vendor Response

4.1. Vendor Questionnaire

1. Introduction, Background, Scope of Work

1.1. Introduction

The City of Wheat Ridge (the “City”) Municipal Building is located in the northwest Denver metropolitan area, with municipal offices at 7500 W 29th Avenue, Wheat Ridge, CO 80033. The City’s area consists of about nine square miles of rolling land adjacent to the Interstate 70 transportation corridor between Denver and the Rocky Mountains. The topography is somewhat unique, with a natural ridge traversing the City. The

City is a suburban community of approximately 33,000 residents. Wheat Ridge is a home-rule municipality with an elected mayor and eight council members, and a Council- Manager form of government. Wheat

Ridge recognizes the Best Value procurement model which allows the City to appoint suppliers that best meet the needs of the City, taking into consideration proposer qualifications, price, products, and service capabilities and other factors relevant to the City’s policies, programs, administrative resources, and budget.

1.2. Background

The City's goal is to contract with a qualified individual or firm to provide exceptional On-Call Irrigation

Services services. Term shall be for one (1) year with the option to renew for four (4) one-year periods .

The City has never contracted for these services.

1.3. Scope of Work

The actual services to be performed will be determined by the City, to include—but not limited to—the following areas:

1.3.1. Scope of Work

All project details will be determined by the City prior to and work commencing. Work shall include all labor, materials and equipment and obtaining of all permits required to construct the sprinkler system as indicated on the irrigation plans and as herein specified. The work shall comply with the requirements of all legally constituted authorities having jurisdiction.

Related Work:

1. Landscape Installation Specification 02900,

2. Seeding & Sodding Specification 02480.

Related Documents Drawings and General Provisions of the Construction Contract, including General and

Special Conditions, apply to the work of this Section.

Quality Assurance:

Requirements:

Work shall be performed in accordance with the best standards of practice relating to the various trades & under the continuous supervision of a competent foreman capable of interpreting Drawings and

Specifications. The Contractor shall notify the Project Manager as soon as any discrepancies between

Drawings and Specifications are discovered. Drawings take precedence over specifications.

Coordination:

Coordinate work of this section with site work, plumbing and other trades and schedule in a manner to avoid damage to other work.

Explanation of Drawings:

A. It is intended that the Drawings and Specifications specify an efficient and complete sprinkler irrigation system for use in accordance with the Manufacturer's recommendations and meeting the

Project Manager's approval without further cost to the City of Wheat Ridge.

B. All drawn irrigation components are intentionally oversized for readability. Before beginning any phase of the work, the Contractor shall check and verify field and drawing measurements and shall notify the Project Manager of any discrepancies.

C. The Contractor shall verify the authenticity of all finish grades within the project area for insurance of proper coverage of the sprinkler system. All finish grades shall be approved prior to installation of the irrigation system.

D. All work specified on the Drawings by notes or details shall be furnished and installed whether or not specifically mentioned in the Specifications.

5. Omissions from the Specifications or Drawings, or any miss-descriptions of details or work, which are absolutely necessary to carry out the intentions of the Drawings and Specifications, shall not relieve the Contractor from performing such omitted details of work.

Material List:

A. All materials shall be new and the best quality of its kind. In addition to compliance with these Specifications and Drawings, all materials and equipment must be accepted by the Project

Manager.

B. Submit product literature for each type of pipe and for each item listed in the Irrigation

Legend. On the literature, indicate the specific model number and type (i.e. size, color, etc.) by circling item with red pen or highlighting with yellow marker.

A. Proposals for substitute materials may be considered. If the Contractor proposes to use such alternative materials, he shall submit a written request for use of the alternate to the Project Manager for his review and acceptance seven (7) days prior to bid opening. All sprinkler heads described on the Drawings are designed to provide the coverage shown. If substitutions require respacing of the irrigation system, the Contractor shall submit plans showing the layout of the lines to be relocated, size of lines, type and gallonage of sprinklers, for the Project Manager approval.

Record Drawings:

A. The Contractor shall be furnished, by the Project Manager, with four (4) sets of Specifications and Drawings, which indicate the work which is part of the contract. The Contractor shall record all changes in the work (including exact measurements of buried valves and locations) on one (1) reproducible full-size mylar set, which will become the property of the Project Manager at the time of acceptance. Upon request, the City shall supply the Contractor with an electronic file (AutoCAD) base map for his "as-built" drawing.

B. The Contractor shall dimension from two (2) reference points, (sidewalk or road intersection, etc.) the location of the following items:

A. Connection to existing water lines.

B. Routing of sprinkler main lines (place dimensions a maximum of one hundred feet

[100’] apart along routing).

C. Control valves for spray zones and drip zones.

D. Quick coupling valves.

E. Manual drains, stops and waste valves.

F. Gate/isolation valves.

G. Subsurface drip systems blow-out stubs.

H. Control wire routing if not with pressure mainline.

I. Control wire and communication cable splices.

J. Water meters.

K. Locations of all sleeving including size, quantity and depth of sleeve.

L. Filters.

M. Any other equipment as directed by the Project Manager.

C. The Contractor shall deliver, on or before the date of Final Completion, the corrected and complete Drawings to the Project Manager. Delivery of the Record Drawings will not relieve the

Contractor of the responsibility of furnishing the Project Manager with required location information during the one (1) year warranty period.

Backflow Prevention Certification:

Prior to operating the irrigation system, submit a written verification that the backflow prevention valve has been inspected and approved by a certified inspector.

Operation & Maintenance Manual:

Provide, in a three-ring binder, labeled with the project name and address, information regarding the equipment, warrantees and procedures. The Project Manager will determine for each project, which items from the following list will be required.

A. Dividers labeled Controller, Valves, Sprinkler Heads, Drip Components, Pipe and

Miscellaneous.

B. Manufacturer’s information for each product used. Indicate the exact product/model/size used by drawing a red circle around it or by highlighting with a yellow marker.

C. Wiring diagram indicating wire locations and color coding.

D. Type-written Certificate of Warranty from the manufacturer of the heads, valves, subsurface drip equipment and controller.

E. Typewritten letter of Warranty from the irrigation contractor or sub-contractor. Include the name and phone numbers of the appropriate person to contact should repairs or replacements be necessary.

F. Typewritten instructions, explaining in step-by-step format, the spring start up and the winter shut down procedures.

G. Submit written operating instructions, watering schedule, and winterizing operations, spring start-up instructions, irrigation plan reduced to 11” x 17”, Irrigation legend (8½” x 11”), and product literature to the Owner prior to final acceptance.

H. Two (2) controller charts indicating zone number, type of sprinkler (rotor, spray, drip or subsurface), location in site, run time necessary to deliver one-quarter inch (¼”) of water and gpm of zone. Charts shall be laminated.

Product Delivery, Storage & Handling:

A. All pipe shall be permanently and continuously marked as follows:

A. Manufacturer's name or trademark, size, schedule, and type of pipe, working pressure at 73 degrees F.

B. National Sanitation Foundation (NSF) approval.

C. Quality control code.

B. Plastic pipe shall be delivered to the site in unbroken bundles or rolls, package in such a manner as to provide adequate protection for the pipe ends, either threaded or plain.

Job Conditions:

A. Site Conditions: The Contractor shall coordinate his work with that of other trades wherever possible so as not to conflict. Before starting work, the Contractor shall inspect the site and check all grades to satisfy him that he may safely proceed. Changes or alternations in the system to meet site conditions shall be discussed with the Project Manager prior to proceeding with the work.

A. Existing Utilities & Conditions: The Contractor shall at all times and before excavation, take the proper precautions to protect utilities, service lines, cables, conduits, sewers, tanks, and irrigation, the presence of which are known or can be determined by the examination of appropriate plans and maps available through the utility companies or the City of Wheat

Ridge as well as location of the utilities on site. Contractor shall contact the utility notification center of Colorado at 1-800-922-1987 and have all utilities on site located. If utilities, service lines, cables, conduits, sewers, tanks, or irrigation are to remain in place, provide adequate means of protection during earthwork operations. If these elements conflict with the proposed work the Contractor shall immediately notify the Project Manager. Do not permit heavy equipment such as trucks, rollers or bulldozers to damage these elements. Hand excavate, as required, to minimize the possibility of damage to underground these elements.

The Contractor shall be responsible for the cost of repair of any damaged protect utilities, service lines, cables, conduits, sewers, tanks, and irrigation to the satisfaction of the Project

Manager and the owner of the property damaged.

B. Water Supply Source: The water supply source shall be as shown on the plans.

Irrigation Maintenance:

Contractor shall maintain all irrigation for a period of time determined by the maintenance warranty. See

Warranty Specification 01800. Maintenance shall include, but not be limited to, the following:

A. Programming the controller for optimum health of landscape and for efficient use of water.

B. Monitoring the operation of the system.

C. Repairing or replacing components of the system within twenty-four (24) hours of service interruption.

D. Communicating with the Project Manager.

E. After the Certificate of Substantial Completion is issued, the Contractor is responsible for one spring turn on and adjustment (on or about May 1st), and one winterization of the system utilizing compressed air (on or about November 1st). The Contractor shall notify the Project Manager of the exact date of spring start up and fall shut down. All damage due to improper shut down or start up, including damage due to temperatures less than 32 degrees, shall be the sole responsibility of the

Contractor.

Warranty:

A. The entire sprinkler system work shall be under Warranty for a period of time consistent with the landscape. See Project Closeout Specification 01700 and Warranty Specification 01800. Should any trouble develop within the time specified above due to faulty workmanship, faulty products or damage by the Contractor, the defect and any resulting damage shall be corrected by the Contractor without expense to the Owner, within twenty-four (24) hours of the notification.

B. The Contractor is not responsible for sprinkler system repair due to vandalism or due to acts of God. (Also see Warranty Specification 01800.)

C. Any settling of backfilled trenches, which may occur during the warranty period, shall be repaired without expense to the City of Wheat Ridge, including complete restoration of all damaged property.

Materials – General:

A. All materials shall be new and the best quality of its kind. Unless noted otherwise, the

Contractor shall provide all materials. In addition to compliance with these Specifications and

Drawings, all materials and equipment must be accepted by the Project Manager. Refer to current

Standard Irrigation Equipment List for additional information.

Pipe:

A. All pipes shall be continuous, new and permanently marked with the manufacturer's name.

B. All pipes shall conform to the United States Department of Commerce commercial standard

ASTM D-2241, National Sanitation Foundation No. 14.

C. Pipe shall be sized as per Drawings.

D. Sleeving Pipe: Pipe shall be Class 200 PVC as manufactured by Eagle Plastics Industries or approved equal. See paragraph E. below for electrical conduit requirements.

E. Mainline:

A. Two and one-half inch (2-1/2”) and smaller: Pipe shall be Class 200 (SDR -21) for solvent weld joints as manufactured by Eagle Plastics Industries, Inc., or approved equal.

B. Larger than two and one-half inch (2-1/2”): Pipe shall be Gasket Joint PVC Pipe, Class

200 (SDR-21) as manufactured by Eagle Plastics Industries, Inc., or approved equal.

C. Where pipe crosses under roads or pavement in sleeves and the distance is greater than the available length of rigid PVC pipe, the mainline shall be High Density Polyethylene

Pipe (PE 4710 by JM Eagle or approved equal) with a pressure rating of 200 psi. No joints in the mainline are allowed under the pavement.

F. Lateral Lines: All other lateral pipe shall be PVC Class 200 (SDR-21).

G. Electrical Conduit: Electrical conduit shall be gray Schedule 40 PVC conduit. All pipes shall conform to the Underwriters Label UL651 approved standards.

H. Fittings and Connections:

A. For two and one-half inch (2-1/2”) diameter and smaller pipe: Except where noted on the plans or details, all solvent weld PVC pipe fittings shall be ASTM D-2241 Schedule 40 PVC.

All threaded fittings shall be ASTM D-2241 Schedule 80 PVC.

B. For pipe larger than two and one-half inch (2-1/2”) diameter: All fitting shall be ductile iron, self restrained fittings.

C. Triple Swing Joint Fittings: All triple swing joint fittings shall be Rainbird TSJ of size indicated on the plans and details.

D. Slip fitting socket taper shall be of a certain size so that a dry unsoftened pipe conforming to these specification provisions can be inserted no more than halfway into the socket.

E. Plastic saddle and flange fittings shall not be permitted.

F. All threaded pipe shall be Schedule 80 PVC pipe.

Sprinkler Heads:

A. Pop-up Spray Sprinklers: Pop-up spray sprinkler heads shall be as listed in the Irrigation

Legend on the Drawings. All heads shall be ratcheting with a removable nozzle. All nozzles shall have matched precipitation rates. The nozzle delivery pattern shall be as indicated on the drawings.

B. Pop-up Rotor Sprinklers. Rotary spray sprinkler heads shall be as listed in the Irrigation

Legend on the Drawings. All heads shall be ratcheting with a removable nozzle. The nozzle size and delivery pattern shall be as indicated on the drawings.

Subsurface Drip Irrigation Equipment:

A. All products used for subsurface drip irrigation systems shall be manufactured by Netafim USA and shall be as listed in the Irrigation Legend on the drawings. These products shall include, but not be limited to, the following:

A. Dripline with or without emitters.

B. Pressure-regulating Filter.

C. Flush Valves.

D. Fittings.

E. Air relief valve

F. Accessories.

Valves & Associated Products:

A. Backflow Prevention Valve: The Backflow prevention valve shall be as listed in the Irrigation

Legend on the drawings. Sizes shall be as shown on the drawings.

B. Electric Remote Control Valve: The remote control valves shall be as listed in the Irrigation

Legend on the drawings. Sizes shall be as shown on the drawings. Provide valve with a pressure regulating device, except drip zone valves.

C. Quick Coupling Valves (2-piece body): The quick coupling valves shall be as listed in the

Irrigation Legend on the drawings.

A. Quick-Coupling Valve Keys: The valve keys shall be of the same manufacturer as the quick coupling valves and shall be of proper size to fit the valves listed in the Irrigation

Legend. The Contractor shall furnish the Project Manager with two (2) valve keys.

B. Swivel Hose Ells: The swivel hose ells shall be of the same manufacturer as the quick-coupling valves with one-inch (1") standard female pipe thread connection and three-quarter inch (¾") male hose thread connection. The Contractor shall furnish the Project Manager with two (2) hose swivels.

D. Ball Valve: The plastic ball valve shall be as indicated in the Irrigation Legend.

E. Angle Valve: The angle valve at the control valve shall be an angle valve connection by

Leemco, Inc. or approved equal. Size to match control valve size, unless indicated otherwise on the

Drawings.

F. Gate/Isolation Valve: The gate valve/isolation valve shall be a resilient seat gate valve by

Leemco, Inc. or approved equal. Isolation valves located on the main line shall have a square nut.

Size to match pipe size, unless indicated otherwise on the Drawings.

G. Drain Valve: Drain Valve shall be a bronze curb stop by the Ford Meter Box Company or approved equal. Size per Details and Drawings.

H. Stop and Waste Valve: The stop & waste valve shall be a bronze stop & drain ball valve by

Ford Meter Box Company or approved equal. Size to match pipe.

I. Valve Boxes: All valves boxes shall be manufactured by Pentek and shall be the “T” top models. Size and shape shall be as indicated in the Drawings and Details.

J. Aggregate: For drainage sumps and beneath valve boxes, the aggregate shall be washed, freedraining river rock, three-quarter inch (¾") to one and one-half inches (1½”) in diameter.

K. GeotextileFabric: Geotextile fabric shall be 3.5 oz./sq.yd. Polyspun filter fabric (see

Details).

Backflow Enclosures:

The backflow enclosures shall be as shown in the Details on the Drawings.

Controller:

USE IF PROJECT IS BEING CONSTRUCTED BY A DEVELOPER FOR A PROPERTY THAT

WILL EVENTUALLY BE MAINTAINED BY THE CITY. The temporary automatic controller shall be supplied and installed by the Contractor. The temporary automatic controller shall be a

__________ (typically a Hunter ICC, but will be determined by the department on a case-by-case basis) with the necessary number of stations. After Final Completion, the controller shall become the property of the City.

USE IF PROJECT IS BEING CONSTRUCTED BY THE CITY. The automatic controller shall be supplied by the Contractor. The automatic controller shall be a ___________ (to be determined by the department on a case-by-case basis) with the necessary number of station.

B. USE IF PROJECT IS BEING CONSTRUCTED BY A DEVELOPER FOR A PROPERTY THAT

WILL EVENTUALLY BE MAINTAINED BY THE CITY. The permanent automatic controller shall be supplied by the Contractor. The permanent automatic controller shall be a ___________ (to be determined on a case-by-case basis by the department) with the necessary number of stations.

A. The Contractor shall supply and install the controller enclosures, concrete pads, 120V power supply and other components as per the Details on the Drawings.

B. Rain Sensor: The rain sensor shall be as indicated in the Irrigation Legend and shall be provided, but not installed, by the Contractor.

Irrigation Control Wire:

A. Standard Installation: Wire shall be Type PE, 14 AWG, single conductor, insulated wire suitable for direct burial applications. If wire length exceeds 2500 feet, wire shall be 12 AWG. Wire shall be UL listed and have a .045" covering of low density, high molecular weight polyethylene insulation. Wire colors shall be as listed in the Wiring Table on the drawings.

B. Two-wire System: Wire shall be

EXECUTION:

Installation Schedule & Implementation:

A. Connections to existing distribution systems or mains in developed areas shall be scheduled so that use of these mains to irrigate other portions of the project will not be interrupted for more than two (2) consecutive days.

B. The schedule of construction shall be set, so that no lawn area or plant material is without irrigation for more than two (2) consecutive days, unless approved, in writing, by the Project

Manager or Inspector.

C. The location of each run of pipe, or laterals and all sprinkler heads and valves shall be staked out by the Contractor prior to trenching. Before installation is begun in any given area, the Inspector shall check all locations and give his approval or disapproval. All pipe, valves, fittings, etc., shall be carefully placed in the trenches with concrete thrust blocks to be poured at all fittings and valves, as indicated on the Details. The interior of pipes shall be kept free from dirt and debris and when pipe laying is not in progress, open ends of pipes shall be closed by approved means.

Inspections:

A. The Contractor shall arrange a meeting with the Project Manager or Inspector, prior to commencing work, at which time the Contractor shall be informed of the specific instructions required and the method of calling for such inspections as the individual work is completed.

B. When the Contractor is prepared for one of the required inspections, he shall give the Project

Manager notice to visit the site and perform the inspection. This does not preclude the right of the

Project Manager to make informal inspections at any time during the work of this section.

C. The required irrigation inspections for which the Contractor must notify the Project Manager twenty-four (24) hours in advance are as follows:

A. Sprinkler Location & Piping Layout: After final grading has been approved, the Project

Manager shall inspect the staked locations of all sprinkler piping and heads for conformance to the Drawings & Specifications. The Project Manager reserves the right to move, shift or adjust any or all of the stakes to better achieve the design intentions as shown on the

Drawings. No trenching shall be done until approval of inspection is complete. No partial acceptance shall be made.

B. Valve Box: After the installation of the first valve is completed, the Project Manager shall inspect for proper installation per details and specifications.

C. Coverage Test: After the sprinkler heads have been installed and backfilling operations are complete, the Contractor, in the presence of the Project Manager or Inspector, shall perform a coverage test to determine if the irrigation system reaches all parts of the lawn and planted areas.

D. Mainline Pressure Test: If determined to be appropriate by the Project Manager, the

Contractor shall perform a mainline pressure test. In the presence of the Project Manager, the Contractor shall pressurize the system using compressed air for two to four (2-4) hours to determine if there are significant leaks in the pipe or joints.

D. The required irrigation inspections for which the Contractor does not need to notify the

Project Manager twenty-four (24) hours in advance are below. These inspections shall take place on an on-going basis, as construction proceeds.

A. Wiring Inspection: When the wiring has been installed, the Project Manager shall inspect it for conformance to the Drawings & Specifications. Continuity tests shall be required for spare wires that are not connected to valves.

B. Mainline, Lateral Piping and Valve Inspection: As piping and valves are installed, the

Project Manager shall inspect for proper materials and installation.

C. Subsurface Drip Systems: Prior to the Contractor covering subsurface drip systems, the

Project Manager shall inspect the operation of the system to insure that all emitters are operating properly.

E. The Project Manager/Inspector prior to soil preparations, seeding and sodding, must approve operations and installation.

F. The Contractor shall not cover up or otherwise remove from view any work under this contract without prior approval of the Project Manager. Any work that has been covered prior to inspection shall be uncovered to full view by the Contractor at his expense.

G. If it happens that the Contractor requests inspection of the work and the work is unfinished, the Contractor shall be fully responsible for the inspection costs.

Water Tap & Water Meter:

Water tap and water meter, if required, shall be installed in accordance with City of Wheat Ridge requirements, in location indicated on the drawings.

Backflow Preventer:

Backflow preventer shall be provided and installed by the Contractor as per Drawings. The Contractor shall install a pre-fabricated base or concrete slab to which the enclosure will be attached (see Details).

The Contractor shall install the backflow enclosure per manufacturer's recommendations. The

Contractor shall have the backflow preventer tested by a certified testing agency and present proof of certification to the Project Manager (see Submittals).

Staking and Layout:

A. The Contractor shall provide all materials necessary for the staking of the proposed irrigation system.

B. The Contractor shall flag main line location, heads, controller and backflow prevention device for the new system. Once the heads have been flagged, the Contractor shall contact the Project

Manager or Inspector twenty-four (24) hours in advance, and request inspection of layout and staking. The Project Manager or Inspector will observe layout and indicate any changes as needed.

Observation does not relieve the Contractor of responsibility for acceptable coverage.

Trenching:

A. Trenching for PVC pipe sprinkler lines shall be straight with bottoms at uniform slopes and of sufficient depth to provide minimum cover above the top of the pipe. Trenches shall be of sufficient width to permit proper handling and installation of pipe and fittings, and to allow a thorough tamping of the backfill material under and around the pipe.

B. Pipe depths are absolute minimums and it shall be the Contractor's responsibility to determine the exact pipe depths in conjunction with the prescribed cold weather drainage protection. Depth to top of pipe shall be as indicated below. Maximum depth shall be no more than three inches (3”) greater than minimum depth unless approved by Project Manager.

A. For lateral lines: eighteen inches (18") minimum depth.

B. For main lines: twenty-eight inches (28”) to thirty-two inches (32”) depth.

C. All irrigation lines shall have a minimum horizontal clearance of twelve inches (12”) from lines of other trades, except where noted or directed by the Project Manager. The application of these requirements does not apply to any lines crossing at right angles with each other. A minimum of one-inch (1") vertical clearance shall be maintained between lines, which cross at these angles.

D. If ground water is encountered during the trenching above the elevation of the bottom of the pipe bell grade, such water shall be removed until the pipe has been installed. The joints and the open ends, if any, shall be plugged to prevent ground water from entering the pipe.

E. Tunneling shall be permitted only where the pipe must pass under any obstruction, which cannot be removed. In backfilling the tunnel, the final density of the fill must match that of the surrounding soil.

F. No open trenches or partially backfilled trenches shall be left overnight without suitable warning devices approved by the Project Manager. The site shall be continuously cleaned up of excess and/or waste materials as the backfilling progresses and shall be left in a neat and workmanlike condition to the satisfaction of the Project Manager.

G. In the event that rocky conditions are encountered, the Project Manager and the Contractor shall agree upon the amount of additional payment. The failure of the Contractor to obtain a written agreement from the Project Manager at the time the rock is encountered, and his progressing with any such trenching shall be at his own expense. In the event that rocky conditions are made known to the Contractor prior to bidding, then no extra cost shall be allowed.

Plastic Pipeline Fittings, Thrust Blocks & Restraints:

A. Installation – General: All workmanship and materials shall be in conjunction with all applicable local codes and ordinances of legally constituted authorities; where the provisions of these Specifications exceed such requirements, these Specifications shall govern. All plastic pipes shall be installed in accordance with the manufacturer’s installation specifications.

B. Solvent-weld pipe and fittings: Solvent-weld plastic pipe shall be cut with a pipe cutter or fine tooth hacksaw with the assistance of a square-in sawing device or in a manner to assure a square cut. Burrs at cut ends shall be removed prior to installation, so that a smooth, unobstructed flow will be obtained. Only the solvent recommended by the pipe manufacturer shall be used. The solvent-weld joints shall be made in the following manner:

A. Thoroughly clean the mating pipe & fitting with a clean dry cloth.

B. Apply a uniform coat of primer to the outside of the pipe with a non-synthetic bristle brush. Apply primer to the fitting in a similar manner.

C. Apply a uniform coat of solvent to the outside of the pipe with a non-synthetic bristle brush. Apply solvent to the fitting in a similar manner.

D. Re-apply a light coat of solvent to the pipe and quickly insert it into the fitting.

E. Give the pipe or fitting a quarter (¼) turn to insure even distribution of solvent and make sure the pipe is inserted to the full depth of the fitting socket.

F. Hold in position for fifteen (15) seconds.

G. Wipe off excess solvent that appears at the outer shoulder of the fitting.

H. Care should be taken so as not to use an excessive amount of solvent, thereby causing a weakening or obstruction on the inside of the pipe.

I. The joints in the PVC pipe shall be allowed to set at least twenty-four (24) hours before pressure is applied to the system.

C. Gasketed Pipe & Fittings: Dual-seal pipe shall be cut using a tube cutter, fine tooth hacksaw or miter box with assistance of a square-in sawing device or in a manner so as to assure a square cut.

The end of the pipe, to make entry to the rubber ring gasket and socket, must be beveled. Round the lead end of the bevel with a file. Wipe any dirt from the surface of the gasket and from groove. The gasketed joints shall be made in the following manner:

A. Lubricate the exposed face of the gasket.

B. Lubricate spigot end of the pipe on the entire beveled circumference and one and one-half inches (1½") behind the pipe end.

C. Hand align pipe end with bell until it contacts gasket uniformly.

D. Push with turning motion up to stop mark.

E. Install pipe restraints at joints where required by Details on Drawings.

D. Thrust Blocks: Thrust blocks shall be used at tees and bends beneath backflow preventers and where shown on Drawings. Install per Details on Drawings.

A. The thrust blocks shall be concrete, placed on thoroughly compacted soil.

B. Minimum thickness of concrete shall be four inches (4”) in every dimension.

C. Thrust blocks shall be allowed to set at least seventy-two (72) hours before pressure is applied to the system.

E. Pipe Restraints:

A. All fittings on pipe that is larger than 2-1/2” diameter shall be self-restrained.

B. Gasketed pipe joints shall have pipe restraints per the Details on the Drawings.

Distance from fittings and size of pipe determine requirements.

Backfilling:

A. In no event shall trenches be completely backfilled until all required tests of the system have been completed and until the Project Manager has approved the line. The Contractor may backfill all portions of the trench except areas over pipe joints. Trenches shall be carefully backfilled with the excavated soil after all dirt clods and rocks larger than two inches (2") in diameter have been either broken up or removed. The backfill shall then be equally distributed on both sides of the pipe in twelve-inch (12") layers and thoroughly compacted.

B. Puddling or jetting shall be used during backfilling operations. An excess of water shall be avoided in order to prevent disturbance of the ground around the periphery of the pipe and also to prevent unnecessary pressure on the pipe. When jetting is used, jets shall be of approved quality and sufficient length to reach the bottom of each layer. All costs found necessary for the above procedure shall be borne by the Contractor.

C. Backfilling of trenches, which lie below pavement areas, shall be thoroughly compacted to ninety-five percent (95%) relative compaction. If in the event of settling, after paving, the

Contractor shall repair the paving as per City of Wheat Ridge specifications.

D. Any settling of backfilled trenches, which may occur during the guarantee period shall be repaired without expense to the City of Wheat Ridge, including complete restoration of all damaged property.

Control Wiring:

A. Control & Common Wire Installation: All control wires shall be installed beside the mainline

(see Details). Wire shall be placed as loose as possible and with as much slack as possible to allow for expansion and contraction of the wire. Where it is necessary to run wire in a separate trench, the wire shall have a minimum cover of two feet (2’) and shall have detectible warning tape installed six inches (6”) above the wiring. The wires designated for the master valve shall be placed in Class 200

PVC conduit between the controller and the backflow prevention device.

B. Connecting and splicing of wire at the valve or in the field may be made by using waterproof wire connectors (as designated by the Details).

C. The Contractor shall isolate field splices in one (1) central location or more if needed. All field splices shall be placed in a standard rectangular valve box set to grade and branded as per

Details.

Automatic Controller:

USE IF PROJECT IS BEING CONSTRUCTED BY A DEVELOPER FOR A PROPERTY THAT WILL

EVENTUALLY BE MAINTAINED BY THE CITY. The automatic controller shall be installed by the

Contractor in accordance with manufacturer’s instructions and as per the Drawing and Details. The

Contractor shall supply and install the controller enclosures, concrete pads, 120 V power supply and other components as per the Drawings and Details.

USE IF PROJECT IS BEING CONSTRUCTED BY THE CITY. The automatic controller shall be installed by the City in accordance with manufacturer’s instructions and as per the Drawing and Details.

The Contractor shall supply and install the controller enclosures, base, 120 V power supply and other components as per the Drawings and Details.

Valves and Valve Boxes:

A. Control Valves: Control valves shall be installed in a branded valve box as per Detail.

B. Quick Coupling Valves: Quick Coupling valves shall be installed in a branded valve box with swing joint assemblies as per Detail.

C. Valve Boxes: Control valve boxes shall be installed on a minimum of four inches (4”) of aggregate material over geotextile fabric for proper foundation of box and easy leveling of box to proper grade and also to provide drainage of the access box. Aggregate shall extend three inches (3”) beyond the valve box in each direction.

A. All valve access boxes shall be provided with proper length and size extensions, wherever required, to bring the valve boxes level with the finished grade (see Details).

B. All valve box covers shall be branded one-eighth inch (1/8") deep with the letters indicated in the Branding Legend.

D. Drainage Sump for Drain Valves: Provide a sump of free-draining aggregate as indicated on the

Details.

Sprinkler Heads:

Unless otherwise specifically designated on the Drawings, the installation of sprinkler heads shall include the excavation and backfill, the furnishing, installing and testing of risers, fittings and sprinkler heads, and the removal and/or restoration of existing improvements and all other work in accordance with the Drawings and Specifications.

Subsurface Drip Systems:

Unless otherwise specifically designated on the Drawings, the installation of subsurface drip systems shall include the excavation and backfill, the furnishing, installing and testing of headers, fittings, valves and dripper line, and the removal and/or restoration of existing improvements and all other work in accordance with the Drawings & Specifications. Installation of the subsurface drip system shall be in accordance with the instructions, details and specifications of the Netafim Company, except when indicated differently by the Details in the Drawings.

Flushing and Testing:

A. After all new sprinkler piping is in place and connected for a given section, and all necessary division work has been completed, prior to the installation of the sprinkler heads, all control valves shall be opened and a full head of water used to flush out the system.

B. Pressure tests and coverage tests shall be performed as described in section 3.2 of this specification. The Contractor shall provide all equipment necessary for the proper execution of each test.

C. Wire Testing:

A. After installation, all wiring attached to equipment shall allow proper operation, be free from damage and meet manufacturer’s suggested values. All wiring not attached to equipment shall be free from damage and meet manufacturer’s suggested values.

B. The Owner reserves the right to test all wiring (including required spare wires) for continuity and resistance. It will be sole duty of contractor to find faults and make repairs as needed to bring wiring into compliance with requirements.

C. City of Wheat Ridge Parks & Recreation, personnel within the Parks, Forestry, & Open

Space Division will conduct all testing and indicate to the Contractor through the Project

Manager which wires do not properly operate equipment, exhibit damage and/or do not meet manufacturer’s suggested values.

Adjustments:

During the warranty period, the Contractor shall make adjustments to the system as necessary without additional cost to the owner.

Protection and Repairs:

A. Protection of Property:

A. It shall be the responsibility of the Contractor to protect and preserve all utilities, plant materials, structure, etc., from damage during irrigation construction. If damage does occur, all damage shall be completely repaired or restored by the Contractor at his own expense, to the satisfaction of the Project Manager.

B. Any unnecessary damage beyond the limits of excavation, or normal working areas shall be repaired and paid for by the Contractor. No trench with the exception at taps, tees, crosses, and meter locations shall exceed twenty inches (20") in width for mainline distribution system, twelve inches (12") in width for rotary head laterals and eight inches (8") in width for all other laterals.

B. Replacement of Paving & Curbs: Damage cause by trenching, crossing existing and/or proposed roadways, paths, curbing, etc., shall be kept to a minimum, and all damaged areas shall be restored to original condition, at the Contractor's expense. This will include compaction of subgrade to ninety-five percent (95%) relative compaction. The Contractor will be responsible for all settling of backfilled trenches for a period of one (1) year, as indicated in section 1.8 of this specification.

Clean up:

Perform clean up as a continuous operation throughout the duration of the work.

Training:

For equipment and systems, such as pump stations, that are more complex or different from typical irrigation systems, the Contractor shall provide the training necessary to familiarize City of Wheat Ridge staff with operation and maintenance procedures. The Contractor shall notify the Project Manager to arrange a training session seven (7) days in advance of proposed session date.

Final Acceptance Inspection:

A. At the end of the warranty period, when the Contractor is satisfied that the system is operating properly, that it is balanced and adjusted, and that all work and clean up is completed, he shall notify the Project Manager that he is prepared for Final Acceptance Inspection with date and time at least seventy-two (72) hours in advance. At the given time, the irrigation system shall be inspected by the Project Manager for the following:

A. Sprinkler Heads:

A. Heads adjusted to grade.

B. Heads properly aligned.

C. Nozzles properly adjusted.

D. Broken heads replaced.

E. Missing heads replaced (stolen or otherwise).

F. Broken riser replaced.

B. Subsurface Drip equipment: Control valves and flush valves operate properly and not leaking

C. Control valves operating properly and not leaking.

D. Gate valves and drain valves operating properly and not leaking

E. Controller operating properly and programmed.

B. Any deficiencies in the system shall be noted by the City of Wheat Ridge Project Manager and a written copy shall be given to the Contractor. Within seven (7) days, the Contractor shall make required corrections to bring all materials and work into conformance with the Drawings and

Specifications.

C. Contractor shall provide a revised set of “As-Built” drawings if any modifications have been made during the warranty period that are not correctly reflected on the “As-Built” drawings presented at time of Final Completion.

Measurement and Payment:

A. Measurement of the irrigation system shall be on the basis of the entire system furnished and installed complete and in place, including all pipe, fittings, sprinkler heads, valves, wiring, controller enclosures, backflow enclosure and incidentals necessary to complete the item and provide the coverage of the areas to be landscaped.

B. Payment will be made on the basis of the lump sum bid in the proposal for the irrigation system components and shall constitute full compensation for furnishing all materials, labor, equipment and incidentals necessary to provide a complete system.

C. Before final payment, the Contractor shall furnish "as-built" of all work by him and his sub-contractor(s) covered under this contract.

2. Evaluation Criteria, Evaluation Process

2.1. Evaluation Process

2.1.1. Evaluation Process

To simplify the review process and to obtain the maximum degree of comparability, the proposal must follow the outline described below and—at a minimum—contain the requested information.

A. Response (Qualification details)

B. Proposer Information Sheet

C. Non-Discrimination Form

D. Non-Collusion Affidavit

E. Contractor’s Qualification Form

F. C.R.S. 18-8-503 Affidavit

G. Acceptance of Conditions Statement

H. Current W-9 (blank provided upon request)

Firms will be evaluated not only on their past experience for the type of work involved, but also on their ability to address issues critical to the success of the audit services requirements outlined in this

RFP. Submittals should be formatted to correspond exactly to the bullets. Indexes for each of the categories are preferred, in the same order. Additional relevant information is encouraged.

Omissions or incomplete responses in terms of content or aberrations in form may, at the City’s discretion, render the proposal non-responsive. If you would like to incorporate the City marketing logo or City seal in your submittal, please contact: Kelsey Carter at kcarter@ci.wheatridge.co.us

2.1.2. Selection Process

The selection committee may either recommend an award based on the proposals alone or elect to short-list firms and conduct interviews.

The short-list process includes written notification to the short-listed firms, interviews with firm members, reference checks on the top-ranked firm, and the negotiation of fees.

A. Short List: Submittals will be evaluated in accordance with the evaluation criteria above. The panel will review and score all proposals received. Firms with the highest scores may be invited to participate in oral interviews with the evaluation committee.

B. Oral Interviews: It is anticipated that oral interviews will be conducted in accordance to the schedule below. Short-listed firms will be notified in writing and invited to interview. Key personnel from the firm and major consultants who will be directly involved with the project should attend the interview. The selection committee will, in particular, be interested in knowing more about the firm’s previous experiences, the perceived ability to meet specified deadlines, and the overall project approach, and will appreciate the opportunity to converse with individuals who will act as the primary contacts for the project.

C. Fee Proposals and Final Selection: The City will attempt to negotiate a contract with the highest ranked firm, following the interview process.

2.2. Evaluation Criteria

No. Evaluation Criteria Scoring Method Weight (Points)

1. Firm Capabilities and References for

Similar Work Completed by Proposed

Team

A. Provide an overview of your company’s history. Include information on management, firm size, number of employees, years in business, location of working office, and other DBA’s.

B. Provide references for projects of similar size and scope: include the name, current phone number and email address of the owner’s project manager for each project listed. Provide total dollar amount and a brief summary of the work performed, listing any sub-consultants you may have partnered with.

C. Demonstrate experience in overseeing and coordinating multiple, concurrent projects.

D. Discuss your firm’s familiarity with the project area and local market.

E. State any MBE/WBE, disadvantaged business enterprise participation.

F. Provide a statement agreeing to provide and maintain insurance per the RFQ requirements, if awarded.

G. Disclose any relationships the owner or employees may have that could be construed or perceived as personal or organizational conflicts of interest.

H. Provide a brief summary regarding your firm’s financial stability. Disclose whether or not your firm or any affiliates have filed for bankruptcy or reorganization under bankruptcy laws.

N/A N/A

2. Scope of Submission

A. Identify the team members and their respective roles, including any sub-consultants.

B. Provide resumes of essential staff; indicate experience with similar projects, credentials of training, education, and certifications, and lengths of time with the company, C. Outline experience and references of the project manager on similar projects in the same capacity.

D. Describe individual experiences with the City or other government agencies. Detail experience in the Denver metropolitan and other areas in

Colorado.

E. Describe any prior client relationships that were not renewed after the agreed upon term and why.

F. Describe the unique strengths and relevant experience your firm offers.

G. Provide any instances in the past

5 years of client-firm dispute resolution and whether or not the dispute was resolved to the satisfaction of both parties and if not be prepared to explain why.

3. Effective Approach

A. Provide information on current and projected (next 9 months) workload and how this project will be accomplished within that framework, outlining various phases, if any.

B. Detail your approach in managing work to meet project deadlines, or an expedited schedule if needed.

C. Identify any foreseeable problems in the implementation of the program.

D. Describe how the objectives identified will be achieved.

E. Demonstrate your understanding of the technical requirements.

N/A N/A

4. Plan Effectiveness

A. Discuss your customer service philosophy and your firm’s approach toward client communication and reporting.

B. Discuss quality control methodology, including adherence to widely accepted standards.

C. Discuss your firm’s billing procedures, claims processing, reporting, collection, and customer service policies.

D. Detail any value-added services such as reporting, training, public outreach, educational programs, resources, health and safety programs, investments, or service at public events.

5. Price and/or Total Cost of Ownership

A. Provide a detailed statement of fees including individual rates for partners and support staff.

Include all reimbursable expenses, which…