RFP=2017-0831 - Zone 251 Distribution Project

SCOPE OF SERVICES
 
DESIGN SERVICES FOR ZONE 251 DISTRIBUTION PROJECT
 
Project Description:
 
Project Name: Upper Zone Pump Stations:
Background: Existing Distribution System and Zone 4/5 
The District's distribution system consists of approximately 400 miles of pipe, five pump stations, and six water storage facilities. The majority of the distribution system was installed between 1976 and 1978. Original design Fire Flow conditions varied by density and zoning ranging from 500 to 1500 GPM.
 
The system is served by four pressure zones ranging in elevation from 4,850 to 5,465 feet, with a pressure range of 40 pounds per square inch (psi) to 155 psi. Zone 4 located in the northwest corner of the District, is the Zone 4 referenced in this problem statement. The 1977 Revised Water Master Plan (1977 Plan) discusses the addition of Zone 5.  Pressure Zone 5 may be created as a separate pressure zone in the existing water distribution system as a part of this project.
 
Scope of Work: 
Evaluate the distribution system for capacity deficiencies in Pueblo West’s upper Pressure Zone 4 as related to peak day and fire flow demand at buildout.  Design a pumping, pipeline and storage improvements project that will rectify the deficiencies found.

• Engineering design services will commence following acceptance and award of this RFP subject to note 2 below, and shall consist of surveying, attendance at project meetings, response to RFIs, review of submittals and shop drawings, attendance at bringing pipeline and pump stations and storage tanks on-line, record documentation and production of record drawings and construction documents, punchlist walk through, and project closeout.  It could include processing change orders, and full time services related to construction observation based upon costs submitted.  Participation in the bid review may be beneficial and may be included in response to this proposal; however, administration of the construction bid will be the District’s responsibility and will be completed by award of construction bid.
• A Professional Engineer licensed in the State of Colorado shall complete and stamp the construction design and the as-built construction documents.
• The project generally includes but is not limited to providing a completed design package, and possibly construction/field engineering services (depending on cost) for the distribution improvements project.
• Implementation of work zone traffic control plans are a part of this scope of work.
• Any non-construction permits are the obligation of the consultant.
• Meet with District staff prior to commencing services to review the overall scope, schedule, deliverables and planning process to implement a successful program

• Pressure range: 35 - 120 psi
• Capability to provide a minimum fire flow of 1,000 gpm at 20 psi during peak day water demand conditions for 60 minutes.
• Established Residential Average Daily Demand is 345 GPM, Peak Day multiplier 2.3  

The project team shall evaluate the District's water distribution system, specifically Pressure Zone 4 and 5 addressing fire flow and pressure concerns in this area. The team will evaluate alternative pressure zone boundaries and booster pump station alternatives associated with these boundaries.
 
The project should include the following components:

• Preliminary review of the existing the Zone 4/5 hydraulic models and existing PWMD water distribution system studies.
• Verify the Zone 4/5 pump station, north tanks and upper and lower boundary elevations
• Evaluate the need for separation of Zone 4 and 5
• Establish and map proposed Zone(s) service area
• Propose location of pressure regulating valves (PRV) and check valve stations for Zone(s) boundaries
• Establish flow requirements for proposed Zone(s)
• Determine design flow rates for a new booster station(s) (if necessary)
• Evaluate the location of a new booster station(s)
• Analyze booster station design alternatives capable of satisfying the determined design conditions (i.e. pitless, package, etc)
• Analyze overall capital construction and operating costs for each process option

• At a minimum, PWMD will provide the following information to teams:
• Existing "As-Built" EPANET model of the water distribution system
• Existing booster station pump information, including the technical specification sheet (Capacity, head, model number, power requirements, etc.)
• PWMD Water Conservation Plan (Historical flow information and future flow projections)
• Map of District in this area: including easements, vacant lots, privately owned property, District owned property (if applicable)
• Water Distribution System Master Plan, Revised 1977
• Map of Distribution System in this area

•  Option 1 – Construct a new pump station and 700‘ suction/discharge line on Parcel 9613020027 (Lot 29 BLK 21 TR 251) Connect suction side to existing 24” pipeline.  Maintain the current pressure zone configuration.  Install bypass check valve.  Hydropneumatic Tank, Provide emergency power for the pump station.  
• Option 2 – Construct a new pump station and 700’ suction/discharge line on Parcel 9613020027 (Lot 29 BLK 21 TR 251) Connect suction side to existing 24” pipeline. Maintain the current pressure zone configuration. Install bypass check valve. Replace 3740 feet of existing 8” ACP inch with 12”. Hydropneumatic Tank, Provide emergency power for the pump station.  
• Option 3 - Construct a new pump station and 700’ of suction/discharge line on Parcel 9613020027 (Lot 29 BLK 21 TR 251). Connect suction side to existing 24” pipeline.  Install bypass check valve. Construct a new pump station on parcel 9600002001 (North Tank Farm) and 2400 feet of suction/discharge (various sizes).  Create new pressure a zone boundaries. Limit project scope to the current booster pump 251 service area. Hydropneumatic Tank Provide emergency power for the pump station.  
• Option 4 - Construct a new pump station and 700’ of suction/discharge line on Parcel 9613020027 (Lot 29 BLK 21 TR 251).  Connect suction side to existing 24” pipeline. Bore Plattville Blvd for 100’ of 10”.  Install gate and bypass check valves as needed, defining pressure zone boundries.  Construct a new pump station on parcel 9600002001 (North Tank Farm) and 2400 feet of suction/discharge (various sizes).  Increase zone 4 service area to better match topography.  Construct a 4,000 ft pipeline and 60,000 gallon tank in Parcel D. Provide emergency power for the pump station.

• The consultant shall prepare and provide all necessary bid documents and drawings for the tank, foundation, and accessories as follows: All civil, structural, mechanical, electrical and instrumentation drawings.
• The consultant shall prepare a Project Manual including both General Conditions and Technical Specifications.
• Provide a preliminary (60% design) and final engineering estimate (100% design) of the construction of new elevated water tank.
• Manage a pre bid meeting at the Owner’s facility.
• Provide bidding support services including responding to bidder’s questions, preparation of addendum, assist in receipt of bids, analysis of bids received, and assist in award of the construction contract.
• Provide construction administration services including field progress reports, preconstruction and construction meeting minutes, review and approval of submittals, response to RFI’s, review of contractor’s payment requests, change order review and closeout documentation: punch list, as-builds, O& M manuals. Allow for ten (10) construction meetings which will be held once a month.
• Provide inspection of water tank installation. The inspectors assigned to the work in the field are required to be experienced NACE Certified inspectors. Experienced welding inspectors are required to be AWS Certified Welding Inspectors working under the direction of a SC licensed structural engineer. Inspectors must have a minimum of five (5) years of experience. Submit inspection reports. Allow for ten (10) tank inspections.
• Coordinate with district’s staff, county and state other public utility agencies

1. Meet with District staff prior to commencing services to review the overall scope, schedule, deliverables and planning process to implement a successful program.