ALBEMARLE COUNTY SERVICE AUTHORITY

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1 AGENDA TITLE: Rivanna Water & Sewer Authority (RWSA) Monthly Update STAFF CONTACT(S)/PREPARER: Gary O Connell, Executive Director AGENDA DATE: May 18, 2017 CONSENT AGENDA: Informational ATTACHMENTS: None BACKGROUND: This report continues the monthly updates on the Rivanna Water & Sewer Authority (RWSA) projects and Board meetings. Below are some updates on RWSA projects and issues, including updates from the April 25, 2017 RWSA Board Meeting. Proposed FY 18 RWSA Budget The Proposed Budget and Rates for Fiscal Year 2018 was presented to the Board. A Public Hearing and adoption are scheduled for the May RWSA Board meeting. The proposed budget totals $31 million, 53% for operations and 47% for debt service. Major budget changes include: operational costs for the advanced water filtering via Granular Activated Carbon (GAC); odor reduction project debt (at Moore s Creek Wastewater Treatment Plant); reservoir source water protection and maintenance actions; wholesale water metering comes on-line; SCADA improvements; three (3) new staff members (Engineer to focus on distribution system areas that have not had priority; Engineering Tech/Locator (growth in location required); Water Treatment Plant Operator (way understaffed-one operator at times, longer term staffing increase issue); salary pool and health care cost increases; and debt service increases $1.01 million. The RWSA Board takes up a Public Hearing and consideration of the budget at the May 23 rd meeting. The Executive Director, Bill Mawyer will be at the May 18 th budget workshop to present an overview of the budget. Capital Improvements Program FY 18 The Board approved the CIP, the five-year plan. A detailed report was given last month on the proposed capital program and a summary is attached. RWSA Capital Projects Updates: 1. Schenks Branch Interceptor Frazier Engineering, P.A. Digs, Inc. Construction Start: July 2015 Percent Complete: 99% Base Construction Contract + $819,600+$815,159.85=$1,634, Change Orders to Date = Current Value Expected Completion Date: March 2017 Total Capital Project Budget: $4,700,000 (Upper Schenks Branch)

2 Upper Schenks Branch Interceptor Phase I - All manholes and sewer pipe for this project have been installed and Substantial Completion was achieved on February 7, Installation of landscaped areas will be completed by the City this coming Fall season. The Schenks Branch Sanitary Sewer Interceptor is a pipeline operated by RWSA that serves the City of Charlottesville. The 21-inch sewer line was originally constructed by the City in the 1950s. Evaluations from the flow metering and modeling from the Comprehensive Sanitary Sewer Interceptor Study, and negotiations with the ACSA and City, resulted in an Inflow and Infiltration Reduction Plan from which it was concluded that increased capacity of the Schenks Branch Interceptor was needed for wet weather peak flow. Due to several road construction projects and the construction of the Meadow Creek Interceptor project along the sewer alignment, Schenks Branch was to be constructed in multiple phases. The completed sections, collectively known as the Lower Schenks Branch Interceptor, include the Tie-in to Meadow Creek, the section along McIntire Road Extension, and the section through the Route 250 Interchange. Phase I has been completed. The remaining sections, which are considered the Upper Schenks Branch Interceptor, were split into 2 phases. Both phases are included in a DEQ Consent Order. As a result of discussions between RWSA and DEQ, DEQ set in abeyance a schedule for completing work on Phase 2 as a result of complications associated with the execution of the necessary easements. Phase 2 preliminary construction drawings and specifications have been developed. No bidding or construction can take place until one of the following two options occur: (1) County grants RWSA a suitable easement on County property; or (2) City grants RWSA permission and a street cut permit to install the sewer directly under McIntire Road. Both these projects are only serving City sewer lines, so the project is 100% City customer funded. 2. Rivanna Sewer Pump Station Improvements Hazen and Sawyer Adams Robinson Enterprises, Inc. Construction Start: March 2014 Percent Complete: 84% Base Construction Contract + $23,327,000+$829,492.75=$24,156, Change Orders to Date=Current Value: Expected Completion Date: June 2017 Total Capital Project Budget: $32,200,000 Startup testing and calibration of the new pump station began on April 10 th and is now running full-time. Once all operational tests are successful, the old pump station will be demolished.

3 In 2006 and 2007 a system-wide flow monitoring program was completed for RWSA as part of the on-going Comprehensive Sanitary Sewer Study. The future wet weather pumping firm capacity of the influent pump station from the Rivanna Interceptor to the Moores Creek Advanced Water Resources Recovery Facility (AWRRF) was established in consultation with the City and ACSA with a peak wet weather flow rate equivalent to 53 million gallons per day (mgd). 3. Drinking Water Activated Carbon and WTP Improvements Hazen and Sawyer Ulliman Schutte Construction, LLC Construction Start: April 2015 Percent Complete: 64% Base Construction Contract + $22,563,000+$680,449=$23,243,449 Change Orders to Date = Current Value Expected Completion Date: December 2017 Total Capital Project Budgets: Urban GAC - $24,000,000 Crozet GAC - $3,418,390 Scottsville GAC - $1,600,000 South Rivanna WTP Work is complete on the reinforced concrete placement for structure foundations. The GAC building foundation is 100% complete. Eight GAC contactors have been installed and interior piping is almost complete. Installation of the new GAC building electrical service line is complete, but still needs to be placed into service. The new wash water recycle line is complete, and two new pumps in the sludge pumping station have been installed and started up. Work has started on the clarifier intake piping improvements. Rehabilitation of all the filters is complete, and they have been placed back in service. The air scour system will be completed and started up when the new electrical room for GAC is in service. The structural steel for the new GAC building is generally complete, and the metal siding installation will begin soon. The liquid lime feed tank and building foundations are complete, and work is progressing on the interior piping layout. Observatory WTP The foundation excavation for the Intermediate Pump Station, new GAC building, and chlorine contact tank are complete. The extra costs for rubble removal within the old filter building footprint will be included in a future change order, once all excavation work in this area has been completed. The GAC contactors have been installed and interior piping is complete and being painted. The precast tilt-up walls for the GAC building are erected, and the roof has been installed. The Intermediate Pump Station building structure, walls, and roof are complete. Various electrical conduit and wiring have been installed at the site. Flocculator No. 1 is out of service and the improvement work should be complete by the end of April. Start-up of Flocculator No. 1 is scheduled for early May. A new electrical service is install from Dominion Power is scheduled for mid-april. This will provide power to the new Intermediate Pump Station building, and to the GAC facilities.

4 North Rivanna WTP The Intermediate Pump Station and GAC building concrete foundation work is complete, and the GAC building slab and generator pad have also been finished. The structural steel is complete for the GAC building and the metal siding has been started. The new filter backwash line is complete, and the contractor is preparing the existing filter building interior for selective demolition work. The GAC contactor has been delivered and set. The sedimentation basin mud valves, ladders, and flocculator valves have been installed. The interior filter inlet valve work is approximately 50% complete. The electrical system rehabilitation and improvement work is scheduled to start soon. Crozet WTP The GAC Building and Intermediate Pump Station concrete foundation work is complete. Two GAC contactors have been installed and the GAC piping work is almost complete. New waterline connections for potable water and backwash water to the GAC building are 75% complete. The structural steel erection for the new GAC building is complete, and metal siding work is next. The chemical feed storage tanks have been set, and interior piping work should start soon. Scottsville WTP The GAC building and Intermediate Pump Station concrete foundation work and slab are complete. The GAC contactors have been installed. Additional waterline construction for GAC process piping will be starting soon. The cast-in-place retaining wall outside of the stormwater management sandfilter is almost complete. Drinking Water GAC (Granular Activated Carbon Filtration) Project To meet new water quality standards, the RWSA has Granular Activated Carbon (GAC) advanced filtering projects underway at all the five (5) water treatment plants. In addition, water plant improvements, upgrades, and rehabilitation are underway at the South Fork, Crozet and Observatory Water Treatment Plants (WTPs). 4. Wholesale Water Metering Michael Baker International, Inc. Linco, Inc. Construction Start: January 2016 Percent Complete: 52% Base Construction Contract + $2,228,254-$154,890.65=$2,071, Change Orders to Date = Current Value: Expected Completion Date: July 2017 Total Capital Project Budget: $3,600,000 The three water treatment plant flow meters and sixteen (16) out of twenty-five (25) distribution system flow meters have been completed. In February, Linco brought in a third crew to speed up progress, and plans to bring in a fourth crew to complete one or more sites by April of 2017.

5 Wholesale Water Metering This was a project required in the Water Supply Agreement to assure accurate water use data for future City and ACSA cost allocations. Additional easements were needed and have been granted. New metering has been installed at three of the urban water plants with the GAC/Water Plant Improvement Projects. 5. Reservoir Management Plan Consultant: DiNatale Water Consultants Project Start: November 2014 Percent Complete: 65% Total Contract Cost: $328,668 Expected Completion Date: November 2017 The Phase 1 report is complete, along with a related public information document, and both have been distributed to the Board and are also available for public review at The second year of water quality monitoring for this project is in progress. A bathymetric (volume) survey of Beaver Creek Reservoir will be completed this spring. In June 2014, staff received proposals for services to develop a Reservoir Management Plan to include all five reservoirs that RWSA manages for water supply (Beaver Creek, Ragged Mountain, South Fork Rivanna, Sugar Hollow, and Totier Creek). A selection committee represented by staff from RWSA, ACSA, and the City reviewed proposals and selected two firms for interviews. DiNatale Water Consultants was awarded this contract in the amount of $176,334 and the contract was executed in November The contract was extended in 2016, with $160,141 being approved by the Board in August 2016 for Phase 2, for a total approved contract amount of $336, Moores Creek AWWRRF Odor Control Phase 2, Bridge Repairs, and Second Centrifuge Hazen and Sawyer MEB General Contractors Construction Start: June 2016 Percent Complete: 30% Base Construction Contract + $6,796,000+$1,291,199=$8,087,199 Change Orders to Date = Current Value: Expected Completion Date: February 2018 Total Capital Project Budget (Odor Control Phase 2): $10,108,000

6 Total Capital Project Budget (MC Bridge Repairs): $330,000 Total Capital Project Budget (Second Centrifuge): $1,290,000 Total Capital Project Budget (All three combined): $11,728,000 MEB has completed the concrete foundation for the new biological odor scrubber and coating preparation work on the primary clarifiers, which will protect the concrete from degradation from corrosive gases once the covers are installed. The grit facility equipment has been delivered, and electric work and masonry work in the grit building is on-going. The aluminum covers have been installed on the first primary clarifier, and assembly work for the covers on the second primary clarifier is on-going and they should be installed over the next month. Installation of the foul-air line to the New Rivanna Pump Station is complete and tested. Mechanical installation work will proceed once demolition and subsurface activities are complete. The change order for the second centrifuge, as approved at the January 2017 BOD meeting, has been executed and demolition work in the Sludge Handling Building has begun. In addition to the above construction contract activities, the following initiatives are being conducted as part of the overall Odor Control: - Solids Handling ($550,000 budgeted) - RWSA has purchased covered trailers to load biosolids directly from the centrifuge s conveyor system. The current method stockpiles biosolids outside at the former compost yard, and then the biosolids are loaded into the hauler s trailers for transport to the McGill Environmental Systems composting facility in Waverly, Virginia. Conveyor system modifications are currently being installed. Four trailers and a yard spotter truck (for use in moving trailers around the MCAWRRF grounds) have been purchased and delivered. A solids hauling RFP utilizing the purchased trailers was issued, and the successful bidder was McGill Environmental Systems. The contract will be executed as an addendum to their existing contract with RWSA for hauling biosolids. - Digester Sealing ($540,000 budgeted) - Odor-causing gases have been found to be emitted from the digester roofs. This project is intended to seal the interior of the digesters, reducing gas emission as well as protecting the integrity of the existing digester roof from harmful corrosion. An RFP for sealing will be sent out in the second quarter of Holding Pond Cleanout ($500,000 budgeted) Over time, grit and organic material have accumulated in the Wet Weather Holding Ponds and Equalization Basins and have been a source of odor. This project is to remove these accumulated solids. This project will be undertaken in late 2017, after other components of the Odor Control project are complete.

7 At the January 27, 2015 meeting, the RWSA Board approved this Odor Control project with a budget of $9,330,000 and adopted it with the CIP. The Board of Directors approved award of the construction contract to MEB General Contractors, Inc. at the April 2016 Board Meeting with an associated capital budget increase. 7. Route 29 Water Main Betterment Project (VDOT Project) Whitman, Requardt and Associates, LLP (on behalf of Lane-Corman, Joint Venture for the VDOT Route 29 Solutions Projects) Construction Contractors: AA Group, JR Caskey (subcontractors to Lane-Corman) Construction Start: November 2016 Percent Complete: 81% Base Construction Contract + $2,408, (no change orders) Change Orders to Date = Current Value: Expected Completion Date: April 2017 Total Capital Project Budget: $3,075,000 Construction of the new water main located between Polo Grounds Road and Hollymead Shopping Center began in November Testing and disinfection for Phases I, II and III (of four total phases) of the Route 29 water main, as well as the installation and testing for the 24-inch water main in Berkmar Drive Extended, are complete. As of this date, testing for Phase IV is underway and installation of the new water main line is 94% complete. Project should be completed by the end of May. The VDOT Route 29 Solutions package includes multiple roadway projects along Route 29 in Charlottesville and Albemarle County. One of these is the Route 29 Widening Project, which will widen Route 29 (Seminole Trail) from a four-lane to a six-lane divided highway from Polo Grounds Road to Town Center Drive at Hollymead Town Center. Improvement of this 1.8 mile-long section will include significant grade changes in some sections to increase sight-distance and improve overall safety. Due to these proposed grade changes and full depth pavement replacement, VDOT determined that RWSA s existing 12-inch cast iron water line along Route 29 is in conflict and must be relocated for the entire length of the project. RWSA had previously identified through master planning that a 24-inch water main will be needed from the South Rivanna Water Treatment Plant to Hollymead Town Center in order to meet future water demands. RWSA requested that VDOT and its Design- Build Contractor relocate the existing 12-inch water main as a 24-inch water main, and

8 according to VDOT policy, VDOT would bear the cost of relocation as a 12-inch line and RWSA would bear the additional cost for the betterment from 12-inch to 24-inch. Another component of the Route 29 Solutions package is the Berkmar Drive Extension Project, which will extend the existing Berkmar Drive across the South Fork of the Rivanna River and up to the traffic circle at Meeting Street and Town Center Lane within Hollymead Town Center. As part of the utility work for this project, RWSA has requested that VDOT s contractor install approximately 650 LF of additional 24-inch water main along the new road at the north end of the project. The costs associated with the requested betterment were presented to the Board at its December 15, 2015 meeting. Subsequently, the Board approved the project for inclusion in the Capital Improvement Program at a total capital budget of $3,075,000 and authorized staff to execute a cost sharing agreement with VDOT s Design-Build Contractor, Lane-Corman, for the construction of the Route 29 Water Main Betterment Project (Route 29 Widening and Berkmar Extended) for a not to exceed cost of $2,555, Crozet Finished Water Pump Station Short, Elliot, Hendrickson, Inc. Bid opening scheduled for March 7, 2017 Construction Start: Spring 2017 Percent Complete: N/A Base Construction Contract+ N/A Change Orders to Date=Current Value: Expected Completion Date: Summer 2018 Total Capital Project Budget: $2,600,000 Bids were received, and within the budget. Contractor mobilization has begun. As part of the current FY 2016 CIP, the Crozet Water Treatment Plant is being studied to expand the treatment capacity to secure future demand needs of the Crozet community. Prior to any plant expansion, it has been determined that the finished water pumping facilities are in need of replacement. The existing pump station is very small and was constructed as part of the original plant construction in the late 1960s. The pumping equipment and controls are outdated, and reduce operational reliability and efficiency. The pump house is located in a low, poorly drained area near the ground storage clearwell, and drainage issues exist. Due to the age and condition of pumps, electrical systems, building systems and controls, it has been determined that a full station replacement is necessary. An Alternatives Analysis Report was completed in June 2016, and the chosen alternative is to construct a new, larger building uphill from the existing clearwell tank. The new pump

9 station building will be of similar construction as what is being proposed for the GAC facility at Crozet WTP. 9. Crozet Flow Equalization Tank Greeley and Hansen N/A Construction Start: 2019 Project Status: Siting Study underway Expected Completion Date: 2020 Total Capital Project Budget: $2,325,000 A Work Authorization with Greeley and Hansen (G&H) to perform a siting study for the Flow Equalization Tank Project was issued in October 2016 with completion expected in These services include the sizing of the flow equalization tank and the pumping station based on information from the updated model, a preliminary site selection process based on the sizing requirements identified in order to narrow down the number of sites to a maximum of three, and an alternatives analysis performed for each selected site to evaluate the feasibility of locating the facility. This is the first step in the site selection process and will be followed by a more in-depth analysis of the potential tank locations and the eventual selection of a final site. The first task involves confirming the existing capacities of the four pump stations within the Crozet Interceptor system. Pump tests were performed at all four Crozet Pump Stations and the data from the tests is being analyzed by G&H. An initial analysis of potential tank locations is under review, and next would be to proceed with onsite evaluations related to environmental and cultural restrictions. Rehabilitation work in the RWSA and Albemarle County Service Authority (ACSA) sewer systems is on-going to meet inflow and infiltration (I&I) reduction goals in the Crozet Interceptor sewer basin, based on the flow metering and modeling results of the Comprehensive Sanitary Sewer Model and Study conducted in The intent was to reduce I/I in the system to meet the 2020 two-year storm flow targets. A 2016 update to the 2006 model was completed, which evaluated the I&I reduction goals previously established and future capital project needs. Based on the results of that study, it was determined that the Crozet Interceptor system and namely the existing Crozet Pump Stations (1 through 4) have adequate capacity to handle the 2015 peak wet weather flow from the Crozet service area during a two-year storm. However, as projected growth in the service area occurs, peak wet weather flows in the area under the storm conditions established in the updated model will begin to exceed the firm capacities of the pump stations by Additional I&I reductions, in order to reduce flows enough to not exceed the pump station firm capacities, are not feasible and as a result the construction of a flow

10 equalization tank was identified as the best method to alleviate wet weather capacity issues. While the study indicates that capacity should not be an issue until 2025, a flow equalization tank would also provide a significant benefit to the maintenance of the Crozet Pumping Station system which currently lacks system storage necessary to allow adequate time to perform repairs on the pumps and the associated force mains while the system is down. As a result, it is important to progress into the siting study for the flow equalization tank to ensure that it can be constructed in time for the 2025 flow targets, but also to facilitate less complicated and more thorough maintenance on the system that has not been possible previously. Other RWSA Related Project Updates: 1983 Working Agreement ( Working Agreement on Urban Area Wholesale Flow Allocation and Billing Methodology ) The existing 1983 Working Agreement for water is currently used to establish monthly billings by RWSA to the ACSA and the City for the Urban water bill. The Wholesale Water Metering Project, once complete, will change the approach and consequently the Working Agreement will need to be amended. We are reviewing the agreement and will be having discussions with RWSA and City staff as a next step. The metering project has been delayed and work is slow. Due to the construction delay, it is now clear that the meters will not be in place for the 2018 budget. Initial drafting work and discussions have started occurring. South Rivanna Hydropower Plant Rehabilitation RWSA constructed a hydropower plant at the South Fork Rivanna Dam in Power generation at the plant was limited for a number of years due to various mechanical issues and has been completely offline for the past two years. The Board approved surrendering the license and decommissioning the facility, based on the lack of a return on the capital investment, and impacts on managing the water supply and flow releases to the river. South Fork Reservoir to Ragged Mountain Pipeline The adopted RWSA CIP Budget has $2,295,000 budgeted to the right-of-way and feasibility phase, with funding beginning in July 2017 (FY 2018). The future construction of a new pipeline is part of the 50-year Community Water Supply Plan to increase the future transfer capacity through replacement of the Sugar Hollow pipeline along an alternative alignment to be determined. The pipeline project will involve a more detailed routing study to determine the most feasible alignment with work to begin in July Crozet Water Plant Capacity Study As Crozet continues to grow, RWSA monitors the water treatment plant sizing to meet water demand (use) on the maximum day (24 hour period) of each calendar year. RWSA will be conducting a preliminary engineering evaluation of a future water plant expansion in Crozet, as part of the FY 2017 CIP. Current trending is indicating that the maximum day demand could reach the current capacity (1 MGD) of the Crozet Water Treatment Plant as soon as An engineering firm is being selected to conduct this engineering study, and the ACSA is gathering consumption data for the study. The contract is being negotiated,

11 with Board approval expected at the June meeting. The public process for the Crozet Water Master Plan is being discussed, Mr. Kittrell is an active part of that discussion. Observatory Water Treatment Plant The Observatory Water Plant was built in 1949, with some rehabilitation work done in There are several water treatment plant projects at Observatory scheduled in the Capital Improvements Plan (CIP). The most immediate project is to replace the existing flocculator equipment and repair basin inlet troughs, replace valves, install a new baffle wall and SCADA control equipment. The flocculator work has begun. Further work is phased over the five year CIP. Rivanna Water & Sewer Authority Strategic Plan The Board of Directors has requested that a Strategic Plan be developed for the Rivanna Water & Sewer Authority (RWSA). Project is on hold until the summer. Moore s Creek AWRRF (Advanced Water Resource Recovery Facility-Wastewater Treatment) Roof Replacements Major maintenance work to replace aging roofs (35 years plus in age). Project was approved in the CIP (Capital Improvement Program). Reservoirs All but Ragged Mountain full, at nearly 98% capacity. As of this writing, Ragged Mountain is within a half-foot of being full. Attachments RWSAUpdateExecSumm051817