Document Modesto_doc_4763f000c4

April 2016 - FINAL DRAFT 6-1 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx CAPACITY EVALUATION AND PROPOSED IMPROVEMENTS This chapter presents an evaluation of the hydraulic capacity of the sewer collection system, recommended projects to correct current capacity deficiencies, and projects to serve future users. 6.1 CAPACITY EVALUATION The collection system hydraulic capacity evaluation was performed for major gravity pipelines, generally 10 inches in diameter and larger, and 21 lift stations. Its purpose was to determine the system’s capacity for current and projected peak wet weather flows 6.1.1 Capacity Evaluation Criteria The collection system capacity evaluation was performed in accordance with the adopted planning and evaluation criteria and wastewater flow projections summarized in Chapter 5. The criteria for the capacity evaluation are summarized below: • Storm Drain Cross Connections: The City currently has 60 known storm drain cross connections that discharge storm water runoff to the sanitary sewer system. Both the capacity evaluation and the required collection system capacity improvements are affected by a major policy decision regarding the removal of storm cross connections. Based on discussions with the City, the hydraulic model was constructed under the assumption that the cross connections would be removed. If the City decides to keep the cross connections, additional capacity improvements would be required. • Allowable Flow Depth to Pipe Diameter The City has adopted a maximum d/D ratio of 0.85 for existing gravity sewers. Existing pipelines with a d/D of 0.85 or greater were identified as capacity deficient, and improvement projects were developed to mitigate the deficiencies. The new sewers built for these projects were sized using the design d/D values summarized in Chapter 5. • Lift Station Capacity Evaluation Criteria: Lift stations should be sized to convey PWWF at firm capacity, which is the capacity with the largest pump out of service. An additional capacity evaluation was performed for the alternative proposed land use diagram developed on July 11, 2014. The alternative land use collection system evaluation is included as Appendix A and includes flow projections, capacity improvements, and the estimated capital improvement costs associated with the alternative land use diagram. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-2 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx 6.1.2 Gravity System Evaluation The hydraulic model provides a platform for effectively managing the wastewater collection system. As noted in Chapter 4, the hydraulic model includes 150 miles of gravity pipeline 10 inches in diameter or larger. Using this model, a capacity analysis of the existing and future system was performed to identify areas in the collection system where pipeline capacity is insufficient to convey PWWF. After completing the analysis, improvement projects were identified to mitigate pipeline deficiencies. 6.1.2.1 Capacity Deficiencies in the Existing Collection System under Current PWWF Conditions Peak wet weather flows were routed through the existing system hydraulic model. For reasons indicated above, the existing storm drain cross connections were "turned off" for the existing system PWWF hydraulic capacity evaluation. After the evaluation, locations where flow depth exceeded a d/D of 0.85 were identified. In some cases, surcharging and flow depths above a d/D of 0.85 were caused by backwater effects created by bottlenecking An illustration of the backwater effect is shown in Figure 6.1. However, overall, most of the City’s collection system was shown to have sufficient capacity to convey current without exceeding the d/D limit. The only exceptions were several pipeline segments in Areas 1, 3, 4, 5, and 6 (see Figure 6.2). 6.1.2.2 Capacity Deficiencies in the Existing Collection System under Future (Build- Out) PWWF Conditions Additionally, the existing collection system was evaluated to identify capacity deficiencies during at build-out of the service area. For this evaluation, it was assumed that existing deficiencies were mitigated and storm drain cross connections were removed. Figure 6.3 shows the deficient pipelines within the existing system. As shown, several pipeline segments in Areas 1, 2, 3, and 10 were identified as deficient. In addition, new trunk sewers were added to the hydraulic model and sized to service growth areas. As was the case in the capacity evaluation, these pipelines were sized to convey PWWF without exceeding the maximum d/D criteria documented in Chapter 5, which is 0.7 (70 percent) for new pipelines. 6.1.3 Lift Station Capacity Evaluation The City’s hydraulic model includes lift stations that service the major trunk system. Typically, these lift stations serve gravity pipelines 10 inches in diameter or larger and convey flow from large tributaries. Thus, smaller lift stations that serve pipes 8 inches in diameter or less were not included in the hydraulic model. In all, 21 major lift stations were included. Each of these lift stations was then evaluated to determine whether it had ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-3 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx sufficient firm capacity to convey existing and future Table 6.1 summarizes the results of the lift station evaluation. 6.2 COLLECTION SYSTEM CAPACITY IMPROVEMENTS Figure 6.4 illustrates the proposed sanitary sewer improvements needed to correct existing and future deficiencies. This figure also shows new pipelines and lift stations that will serve future users. As previously stated, the improvements were developed assuming that storm drainage cross connections to the sanitary system would be removed. Detailed information for each improvement project is provided in Table 6.2 and is discussed below. 6.2.1 Differentiating between Improvements for Existing Users and Future Users An existing deficiency occurs when the existing facility’s capacity does not meet the planning criteria pipeline upgrades are required to prevent severe surcharging during the design wet weather event). If a project were proposed solely to correct an existing deficiency, existing users would be given 100 percent of the project’s benefit and assigned 100 percent of the project’s costs. An existing sewer or lift station may have sufficient capacity to convey current but as growth continues and more users are added to the system, the increased flow that results will lead to capacity deficiencies. For this reason, these projects, as well as new trunk sewers that would extend wastewater collection system service to future growth areas, are considered future improvements and are allocated to future users. In some cases, a project is needed to correct an existing capacity deficiency but is sized to accommodate additional flows from future development. In these cases, the hydraulic modeling results were used to determine the cost breakdown between existing and future users based on the ratio of existing and build-out average dry weather flows. 6.2.2 Improvements for Existing PWWF Conditions Generally, capacity increases are approached in two ways: existing sewers are replaced with larger pipes, or a parallel relief sewer is constructed. In this case, it was assumed that a capacity deficient sewer would be replaced with a sewer larger in diameter. However, the final decision to replace, realign, or construct a parallel sewer should be made during design. For the most part, the upsized pipeline in the model followed the same slope as the existing pipeline, unless the available data revealed negative or flat slopes in an existing alignment. During the preliminary design phase, the existing sewer should be inspected by closed circuit television (CCTV) to determine its structural condition. If severely deteriorated, the existing sewer would have to be upgraded. If moderately deteriorated, slip lining or cured- in-place pipe lining could be used to rehabilitate the existing sewer. ---PAGE BREAK--- ---PAGE BREAK--- Capacity Deficient Pipes Hydraulic Grade Line Ground Elevation Depth of Flow in Manhole Backwater Effects from Bottleneck Creates SSO Risk Replace Capacity Deficient Pipes with Larger Diameter Sewers Replacement Pipes Eliminate Surcharged Condition in Upstream Pipes SAMPLE ILLUSTRATION OF BACKWATER EFFECTS IN A SEWER FIGURE 6.1 CITY OF MODESTO WASTEWATER COLLECTION SYSTEM MASTER PLAN ---PAGE BREAK--- ---PAGE BREAK--- R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LSR7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS KIERNAN AVE COVERT RD BACON RD BECKWITH RD NORTH AVE WOODLAND AVE MAZE BLVD CALIFORNIA AVE PARADISE RD WHITMORE AVE SHOEMAKE AVE BLUE GUM AVE KANSAS AVE STODDARD RD AMERICAN AVE TULLY RD MC HENRY AVE COFFEE RD OAKDALE RD ROSELLE AVE CLAUS RD LANGWORTH RD CARVER RD DALE RD PRESCOTT RD FINNEY RD ALBERS RD ?Î Scenic Hahn Rumble Benson Rose & Celeste 21'' 15'' 21'' 45'' 18'' 12'' 10'' 12'' 10'' 10'' 60'' 33'' 10'' 30'' 48'' 30'' 10'' 16'' 60'' 24'' 10'' 30'' 10'' 33'' 24'' 18'' 12'' 30'' 10'' 54'' 10'' 10'' 27'' 12'' 18'' 10'' 12'' 26'' 18'' 12'' 10'' 24'' 12'' 21'' 15'' 10'' 10'' 18'' 16'' 21'' 12'' 18'' 15'' 10'' 45'' 18'' 18'' 66'' 12'' 39'' 33'' 12'' 15'' 15'' 12'' 33'' 36'' 27'' 36'' 24'' 12'' 36'' 27'' 51'' 10'' 30'' 24'' 12'' 39'' 12'' 24'' 10'' 10'' 24'' 15'' 10'' 21'' 15'' 12'' 15'' 18'' 30'' 12'' 10'' 12'' 33'' 15'' 12'' 12'' 10'' 10'' 54'' 12'' 15'' 10'' 15'' 16'' 15'' 24'' 15'' 12'' 15'' 15'' 30'' 27'' 12'' 30'' 48'' 36'' 10'' 21'' 18'' 33'' 18'' 10'' 10'' 10'' 18'' 30'' 27'' 24'' 42'' 27'' 60'' 27'' 24'' 48'' 30'' 24'' 10'' 39'' 27'' 18'' 60'' EXISTING COLLECTION SYSTEM CAPACITY DEFICIENCIES FIGURE 6.2 CITY OF MODESTO WASTEWATER COLLECTION SYSTEM MASTER PLAN Legend R7 LS Existing Deficient Lift Stations Existing System Deficencies Emerald Diversion Trunk R7 LS Lift Station Sewer Main Sphere of Influence Tributary Areas Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 Area 7 Area 8/Northern Ceres Area 9 Area 10 O 0 4,000 8,000 Feet Beard Industrial Park Empire North Ceres ---PAGE BREAK--- ---PAGE BREAK--- R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LSR7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS 3 Ú 3 Ú R7 LS KIERNAN AVE COVERT RD BACON RD BECKWITH RD NORTH AVE WOODLAND AVE MAZE BLVD CALIFORNIA AVE PARADISE RD WHITMORE AVE SHOEMAKE AVE BLUE GUM AVE KANSAS AVE STODDARD RD AMERICAN AVE TULLY RD MC HENRY AVE COFFEE RD OAKDALE RD ROSELLE AVE CLAUS RD LANGWORTH RD CARVER RD DALE RD PRESCOTT RD FINNEY RD ALBERS RD ?Î 21'' 15'' 21'' 45'' 18'' 12'' 10'' 12'' 10'' 10'' 60'' 33'' 10'' 30'' 48'' 30'' 10'' 16'' 60'' 24'' 10'' 30'' 10'' 33'' 18'' 12'' 30'' 10'' 54'' 10'' 10'' 27'' 18'' 10'' 12'' 26'' 18'' 12'' 10'' 24'' 12'' 21'' 15'' 10'' 10'' 18'' 16'' 21'' 12'' 18'' 15'' 10'' 45'' 18'' 16'' 66'' 12'' 39'' 33'' 12'' 15'' 15'' 12'' 33'' 36'' 27'' 36'' 24'' 12'' 36'' 27'' 51'' 10'' 30'' 24'' 12'' 39'' 12'' 24'' 10'' 10'' 24'' 15'' 10'' 21'' 15'' 12'' 12'' 15'' 18'' 30'' 12'' 10'' 12'' 33'' 15'' 12'' 12'' 10'' 10'' 54'' 12'' 15'' 10'' 15'' 16'' 15'' 24'' 15'' 12'' 15'' 15'' 30'' 27'' 12'' 30'' 48'' 36'' 10'' 21'' 18'' 33'' 18'' 10'' 10'' 10'' 18'' 30'' 27'' 24'' 42'' 27'' 60'' 27'' 24'' 48'' 30'' 24'' 10'' 39'' 27'' 18'' 60'' Woodland BUILD-OUT COLLECTION SYSTEM CAPACITY DEFICIENCIES FIGURE 6.3 CITY OF MODESTO WASTEWATER COLLECTION SYSTEM MASTER PLAN Legend R7 LS Future Lift Stations Deficiencies Future System Deficiencies R7 LS Lift Station Sewer Main Sphere of Influence Tributary Areas Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 Area 7 Area 8/Northern Ceres Area 9 Area 10 O 0 4,000 8,000 Feet Beard Industrial Park Empire North Ceres ---PAGE BREAK--- ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-7 pw://Carollo/Documents/Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06/Draft Final - Ch06 CS.docx Table 6.1 Modeled Lift Station Evaluation Wastewater Collection System Master Plan City of Modesto, California Lift Station Name Pump Data Existing Capacity Evaluation Build-out Capacity Evaluation I.D. Pump Pump Capacity Firm Capacity Existing PWWF Capacity Deficiency Build-out PWWF Capacity Deficiency (gpm) (gpm) (mgd) (mgd) (Yes/No) (mgd) (mgd) (Yes/No) (mgd) Athens 01 1 250 250 0.36 0.21 No - 0.21 No - Benson 03 1 150 150 0.22 1.19 Yes 0.97 1.33 Yes 1.11 2 500 California 05 1 400 400 0.58 0.36 No - 0.48 No - 2 400 Carver & Scott 06 1 600 600 0.86 0.35 No - 0.35 No - 2 600 Carver & Stanford 07 1 400 400 0.58 0.48 No - 0.48 No - 2 400 Coldwell & N. Olive 11 1 200 200 0.29 0.13 No - 0.13 No - 2 200 College & N. Orangeburg 14 1 226 226 0.33 0.09 No 0.09 No - El Torino & Fairmont 15 1 220 220 0.32 0.22 No - 0.22 No - Emerald 17 1 2,800 5,600 8.06 1.54 No - 1.62 No - 2 2,800 3 4,500 Hahn(1) 19 1 700 450 0.65 0.74 Yes 0.09 0.87 Yes 0.22 2 700 ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-8 pw://Carollo/Documents/Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06/Draft Final - Ch06 CS.docx Table 6.1 Modeled Lift Station Evaluation Wastewater Collection System Master Plan City of Modesto, California Lift Station Name Pump Data Existing Capacity Evaluation Build-out Capacity Evaluation I.D. Pump Pump Capacity Firm Capacity Existing PWWF Capacity Deficiency Build-out PWWF Capacity Deficiency (gpm) (gpm) (mgd) (mgd) (Yes/No) (mgd) (mgd) (Yes/No) (mgd) La Loma 21 1 300 300 0.43 0.15 No - 0.17 No - 2 300 Northgate(3) 26 1 242 242 0.35 0.16 No - 0.16 No - 2 242 Rose & Celeste 29 1 600 600 0.86 1.31 Yes 0.45 1.31 Yes 0.45 2 600 Rumble 30 1 950 950 1.37 1.91 Yes 0.54 2.33 Yes 0.96 2 950 Scenic(2) 31 1 800 1,600 2.30 7.93 Yes 5.63 11.41 No - 2 800 3 7000 Thousand Oaks 32 1 2,300 8,275 11.92 3.72 No - 3.79 No - 2 3,675 3 2,300 4 3,675 ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-9 pw://Carollo/Documents/Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06/Draft Final - Ch06 CS.docx Table 6.1 Modeled Lift Station Evaluation Wastewater Collection System Master Plan City of Modesto, California Lift Station Name Pump Data Existing Capacity Evaluation Build-out Capacity Evaluation I.D. Pump Pump Capacity Firm Capacity Existing PWWF Capacity Deficiency Build-out PWWF Capacity Deficiency (gpm) (gpm) (mgd) (mgd) (Yes/No) (mgd) (mgd) (Yes/No) (mgd) Woodland 39 1 2,000 14,500 20.88 13.78 No - 24.61 Yes 4.29 2 3,500 3 4,500 4 4,500 5 4,500 Jefferson 46 1 1,400 1,400 2.02 1.06 No - 1.42 No - 2 1,400 Coffee & Claratina 58 1 1,000 1,000 1.44 0.67 No - 0.73 No - 2 1,000 County(4) - No Data Available 0.12 - - 0.12 - - Fairview 62 1 450 450 0.65 0.09 No - 0.39 No - 2 450 Notes: Hahn Lift Station upgrade is currently being designed. Scenic Lift Station upgrade is currently under construction. Future firm capacity will be approximately 11,500 gpm (16 mgd). Lift Station is privately owned. County Lift Station is owned and operated by the County and is located at Hackett Road and Crows Landing Road. ---PAGE BREAK--- ---PAGE BREAK--- 3 Ú 3 Ú R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LSR7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LSR7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS 12'' 15'' 18'' 21'' 15'' 24'' 10'' 10'' 12" 15'' 10'' 10'' 15'' Woodland LS 39 15'' 10'' 27'' 10'' 12'' KIERNAN AVE COVERT RD BACON RD BECKWITH RD NORTH AVE WOODLAND AVE MAZE BLVD CALIFORNIA AVE PARADISE RD WHITMORE AVE SHOEMAKE AVE BLUE GUM AVE KANSAS AVE STODDARD RD AMERICAN AVE TULLY RD MC HENRY AVE COFFEE RD OAKDALE RD ROSELLE AVE CLAUS RD LANGWORTH RD CARVER RD DALE RD PRESCOTT RD FINNEY RD ALBERS RD Whitmore/Carpenter LS 62 Scenic LS 31 D-3 D-4 R-2 10'' R-1 24'' U-3 SO-4 EM-1 15'' River Trunk PS Shackelford PS ?Î RT 48'' RT 48'' RT 21'' RT 54'' RT 60'' RT 14'' RT 72'' W-4 S-1 W-3 U-1 U-4 L-2 N-6 N-4 N-7 U-2 SO-1 L-4 SO-3 L-6 SO-2 N-1 N-3 N-9 L-1 N-5 L-3 N-8 D-1 N-2 W-6 W-7 L-5 D-5 D-2 W-1 W-4 SR-1 DT-1 EM-3 EM-4 DT-2 EM-2 15'' 18'' 18'' 12'' 18'' 15'' 15'' 10'' 15'' 18'' 18'' 15'' 24'' 10'' 48'' Hahn LS 19 Rumble LS 30 Benson LS 03 Rose and Celeste LS 29 Dakota Ave LS 64 Chapman Rd LS 60 Pelendale LS 59 Wood Sorrel LS 61 Kansas Ave LS 63 Litt Rd LS 67 Keirnan Ave LS 65 COLLECTION SYSTEM CAPACITY IMPROVEMENTS FIGURE 6.4 CITY OF MODESTO WASTEWATER COLLECTION SYSTEM MASTER PLAN Legend R7 LS Lift Station Upgrade in Progress Pipeline Upgrade in Progress R7 LS New Service Lift Station Improvement New Service Pipeline Improvements R7 LS Capacity Lift Station Improvements Capacity Pipeline Improvements R7 LS Lift Station Sewer Main Sphere of Influence Tributary Areas Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 Area 7 Area 8/Northern Ceres Area 9 Area 10 O 0 4,000 8,000 Feet Beard Industrial Park Empire North Ceres ---PAGE BREAK--- ---PAGE BREAK--- Table 6.2 Proposed Improvements Table 9.3 Wastewater Collection System Master Plan Table 9.3 City of Modesto, California Project Description/ Improvement Ex. Size/ New Size/ Replace/ Number Project Street Purpose Category Diam. Diam. New Length (in) (in) (ft) 2016 2017 2018 2019 2020 2021-2025 2026-2030 2031-2035 Existing System Improvements Area 1 West Trunk LS # 19 - Hahn Hahn Lift Station Honey Creek Road and Nightingale Drive Increase the firm capacity from 0.65 mgd to 1.3 mgd to meet existing and future Capacity 0.6 mgd 2.6 mgd Replace - X Rumble Trunk LS # 30 - Rumble Rumble Lift Station Rumble Road near Bay Lane Increase the firm capacity from 1.37 mgd to 2.33 mgd to meet existing and future Capacity 1.4 mgd 3.5 mgd Replace - X Area 3 River Trunk RT-1 Gravity Pipeline Tuolumne Avenue Provides gravity conveyance of the River Trunk flows from the discharge of the River Trunk force mains to the Sutter Plant. Capacity - 48 New 2,300 X RT-2 Gravity Pipeline Colorado Avenue Provides gravity conveyance of the River Trunk flows from the discharge of the River Trunk force mains to the Sutter Plant. Capacity - 54 New 4,000 X RT-3 Gravity Pipeline Colorado Avenue Provides gravity conveyance of the River Trunk flows from the discharge of the River Trunk force mains to the Sutter Plant. Capacity - 60/72/84 New 3,300 X RT-4 Gravity Pipeline Tuolumne Boulevard Provide peak wet weather diversion for the existing Sutter Trunk. Capacity - 21 New 1,300 X RT-5 Force Main Tuolumne Boulevard Two force mains allows the system to maintain flushing velocities through a wide range of flows and will convey flows from the River Trunk Pump Station. Capacity - 24 & 36 New 2,600 X RT-6 Gravity Pipeline Beard Brook North Gravity Alignment A gravity extension of the Dry Creek crossing that conveys flows to the River Trunk Pump Station. Capacity - 48 New 3,900 X RT-7 Gravity Pipeline B Street Reroute flows to the River Trunk Pump Station. Capacity - 36 & 48 New 1,500 X RT-8 Force Main/Gravity Pipeline Open Space Convey flows from the new Shackelford PS to the new River Trunk in Colorado. Capacity - 14 & 18 New 3,200 X RT-9 Gravity Pipeline Sutter Avenue Based on the results of the condition assessment, the Sutter Ave Trunk will require rehabilitation. Rehabilitation - 24 New 1,300 X RT-10 Gravity Pipeline Open Space Based on the results of the condition assessment, a segment of the River Trunk will require rehabilitation. Rehabilitation - 48/60/66 New 15,000 X RT-11 River Bank Armament Tuolumne River Bank Armoring the riverbank to prevent future erosion and expose of the CSL and River Trunk. Reliability - - New - X RT-12 CSL Diversion Structures North or Sutter Plant A contingency to divert flows between the CSL and River Trunk. Reliability - - New - X LS-Shakelford Shakelford Lift Station East of Crows Landing Eliminate the siphon below the Tuolumne River. Capacity - 4.2 mgd New - X LS-River Trunk River Trunk Lift Station Morton Boulevard Eliminate River Trunk inverted siphon and associated issues. Capacity - 54.5 mgd New - X Area 4 Downtown Trunks DT-1 Gravity Pipeline J Street The trunk in J Street exceeds the maximum d/D criteria under PWWF and causes the existing 12-inch pipeline to surcharge. Capacity 12 15 Replace 2,400 X DT-2 Gravity Pipeline Kimble Street and Floto Street The existing 10-inch diameter pipelines exceed the maximum d/D criteria under PWWF at approximately 90-percent capacity. Capacity 10 12 Replace 1,000 X Area 5 Santa Rosa Trunk SR-4 Gravity Pipeline Coffee Road The existing 10-inch diameter pipelines in Coffee Road exceed the maximum d/D criteria under PWWF and cause the existing 10-inch pipelines to surcharge. Capacity 10 15 Replace 1,600 X Rose and Celeste Trunk LS # 29 - Rose & Celeste Rose & Celeste Lift Station Rose Avenue and Celeste Drive Increase the firm capacity from 0.86 mgd to 1.3 mgd to meet existing and future Capacity 0.9 mgd 2.6 mgd Replace - X Project Length/Size and Cost Capital Improvement Program Cost per Phase Phase 1 Phase 2 Phase 3 Phase 4 ---PAGE BREAK--- ---PAGE BREAK--- Table 6.2 Proposed Improvements Table 9.3 Wastewater Collection System Master Plan Table 9.3 City of Modesto, California Project Description/ Improvement Ex. Size/ New Size/ Replace/ Number Project Street Purpose Category Diam. Diam. New Length (in) (in) (ft) 2016 2017 2018 2019 2020 2021-2025 2026-2030 2031-2035 Project Length/Size and Cost Capital Improvement Program Cost per Phase Phase 1 Phase 2 Phase 3 Phase 4 Area 6 Empire Trunk EM-1 Gravity Pipeline Yosemite Road The existing pipelines in McClure Road exceed the maximum d/D criteria under PWWF and cause the 10-inch pipelines to surcharge. Capacity 10 15 Replace 200 In Progress EM-2 Gravity Pipeline Garner Road This relief pipeline will alleviate surcharging within the Empire Trunk along Yosemite Boulevard and McClure Road. Capacity - 18 New 3,300 In Progress EM-3 Gravity Pipeline Hoover Avenue The existing pipelines exceed the maximum d/D under PWWF at approximately 95- percent capacity. Capacity 10 12 Replace 1,800 X EM-4 Gravity Pipeline Benson Avenue The 15-inch diameter trunk in Benson Avenue exceeds the d/D criteria under PWWF at approximately 93 percent capacity. Capacity 15 18 Replace 1,400 X LS # 03 - Benson Benson Lift Station Benson Avenue Increase the firm capacity from 0.22 mgd to 1.3 mgd to meet existing and future Capacity 0.2 mgd 2.6 mgd Replace - X Sonoma/Lakewood Trunk LS # 31 - Scenic Scenic Lift Station Scenic Drive Increase the firm capacity from 2.3 mgd to 18.4 mgd to meet existing and future Capacity 13.0 mgd 25.6 mgd Replace - In Progress Future System Improvements Area 1 West Trunk W-1 Gravity Pipeline Carpenter Road to Sutter Plant Build-out PWWF causes the lower reach of the West Trunk to exceed the maximum depth criteria at approximately 90 percent capacity. Capacity - 48 New 5,200 X W-3 Force Main North Avenue These improvements are recommended to service future growth within the Beckwith- Dakota and College West CPDs. New Growth - 15 New 4,000 X W-4 Gravity Pipeline Dakota Avenue These improvements are recommended to service future growth within the Beckwith- Dakota CPDs. New Growth - 6 New 8,300 X W-6 Gravity Pipeline Carpenter Road and Paradise Road This improvement is recommended to service infill as the sewer service area extends to include county islands. New Growth - 15 New 4,300 X W-7 Gravity Pipeline Carpenter Road and Paradise Road This improvement is recommended to service infill as the sewer service area extends to include county islands. New Growth - 10 New 2,900 X LS # 63 Kansas Lift Station Kansas Avenue and Altamont Court The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 2.0 mgd New - X LS # 64 Dakota Lift Station Dakota Road and Beckwith Court The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 1.0 mgd New - X LS # 39 Woodland Lift Station Woodland Avenue and Poust Road It is proposed that the firm capacity be increased to 25.9 mgd from its current capacity of 20.9 mgd to meet future Capacity 27.4 mgd 32.4 mgd Expand - X Rumble Trunk R-1 Gravity Pipeline Claremont Avenue and Maud Kump Terrace Under PWWF conditions, this reach of the Rumble Trunk experiences flow depths in excess of the maximum d/D at approximately 90-percent capacity. Capacity 21 24 Replace 5,100 X R-2 Gravity Pipeline McHenry Avenue This sewer trunk extension will provide service to future development in the Pelandale/McHenry CPD. New Growth - 10 New 900 X Dale Trunk D-1 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Kiernan- Carver and Kiernan-Carver North CPDs. New Growth - 15 New 1,200 X D-2 Force Main Undeveloped Area This group of improvements is recommended to service future growth within the Kiernan- Carver and Kiernan-Carver North CPDs. New Growth - 6 New 2,600 X D-3 Gravity Pipeline Chapman Road This group of improvements is recommended to service future growth within the Kiernan- Carver and Kiernan-Carver North CPDs. New Growth - 12 New 1,700 X D-4 Gravity Pipeline Chapman Road This group of improvements is recommended to service future growth within the Kiernan- Carver and Kiernan-Carver North CPDs. New Growth - 10 New 2,200 X D-5 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Kiernan- Carver and Kiernan-Carver North CPDs. New Growth - 8 New 1,500 X LS # 60 Chapman Lift Station Chapman Road The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 1.6 mgd New - X ---PAGE BREAK--- ---PAGE BREAK--- Table 6.2 Proposed Improvements Table 9.3 Wastewater Collection System Master Plan Table 9.3 City of Modesto, California Project Description/ Improvement Ex. Size/ New Size/ Replace/ Number Project Street Purpose Category Diam. Diam. New Length (in) (in) (ft) 2016 2017 2018 2019 2020 2021-2025 2026-2030 2031-2035 Project Length/Size and Cost Capital Improvement Program Cost per Phase Phase 1 Phase 2 Phase 3 Phase 4 North Trunk Extension N-1 Gravity Pipeline Bangs Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 27 New 2,800 X N-2 Gravity Pipeline Bangs Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 24 New 6,100 X N-3 Gravity Pipeline Bangs Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 21 New 1,600 X N-4 Gravity Pipeline Bangs Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 18 New 3,100 X N-5 Gravity Pipeline Bangs Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 15 New 2,400 X N-6 Gravity Pipeline Tully Road Future development within the northern portion of the City will require the completion of a trunk sewers to serve customers. New Growth - 10 New 800 X N-7 Gravity Pipeline American Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 15 New 3,100 X N-8 Gravity Pipeline Kiernan Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 10 New 5,600 X N-9 Gravity Pipeline Kiernan Avenue Future development within the northern portion of the City will require the construction of several trunk sewers to serve customers. New Growth - 8 New 6,300 X LS # 59 Pelandale Lift Station Pelandale Avenue The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 0.3 mgd New - X LS # 65 Kiernan Lift Station Kiernan Avenue and Carver Road The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 0.5 mgd New - X Area 3 Sutter Trunk S-1 Gravity Pipeline Jefferson Street The trunk in Jefferson Avenue exceeds the d/D criteria at approximately 89 percent capacity. Capacity 16 18 Replace 760 X Area 6 Sonoma Trunk Extension SO-1 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Roselle- Claribel CPD. New Growth - 24 New 3,300 X SO-2 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Roselle- Claribel CPD. New Growth - 18 New 2,600 X SO-3 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Roselle- Claribel CPD. New Growth - 15 New 2,800 X SO-4 Gravity Pipeline Undeveloped Area This group of improvements is recommended to service future growth within the Roselle- Claribel CPD. New Growth - 8 New 3,100 X LS # 61 Wood Sorrel Lift Station North of Wood Sorrel Drive and Sylvan Avenue The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 0.1 mgd New - X Lakewood Trunk Extension L-1 Gravity Pipeline Litt Road This group of improvements will service residential and business-commercial-residential growth to the east within the Roselle-Claribel CPD. New Growth - 18 New 900 X L-2 Gravity Pipeline Litt Road This group of improvements will service residential and business-commercial-residential growth to the east within the Roselle-Claribel CPD. New Growth - 15 New 1,700 X L-3 Gravity Pipeline Litt Road This group of improvements will service residential and business-commercial-residential growth to the east within the Roselle-Claribel CPD. New Growth - 12 New 800 X L-4 Gravity Pipeline Plainview Road This group of improvements will service residential and business-commercial-residential growth to the east within the Roselle-Claribel CPD. New Growth - 10 New 3,000 X L-5 Gravity Pipeline Claus Road This group of improvements will service business, commercial, and residential growth to the east within the Village One CPD. New Growth - 8 New 300 X L-6 Gravity Pipeline Merle Ave This group of improvements will service business, commercial, and residential growth to the east within the Village One CPD. New Growth - 10 New 400 X LS # 67 Litt Lift Station Litt Road The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 1.3 mgd New - X Area 10 Ustick Trunk U-1 Gravity Pipeline Ustick Road At build-out of Area 10, the PWWF from new growth will cause the Ustick Trunk to surcharge. Capacity 12 15 Replace 2,100 X U-2 Gravity Pipeline Whitmore Avenue This group of improvements will service commercial and residential growth to the southwest within the Fairview CPD. New Growth - 10 New 1,000 X U-3 Force Main Whitmore Avenue This group of improvements will service commercial and residential growth to the southwest within the Fairview CPD. New Growth - 4 New 400 X U-4 Gravity Pipeline Whitmore Avenue This group of improvements will service commercial and residential growth to the southwest within the Fairview CPD. New Growth - 10 New 3,400 X LS # 62 Whitmore/Carpenter Lift Station Whitmore Avenue The proposed lift station is necessary due to the extensive length, minimum slope of the proposed pipelines, and flat topography of the area. New Growth - 0.8 mgd New - X ---PAGE BREAK--- ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-14 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx 6.2.2.1 Area 1 • Hahn Lift Station (LS 19): Improvements to the lift station are currently being designed to increase the firm capacity from 0.65 mgd to 1.3 mgd. To do this, the two existing pumps will be replaced with two 900 gpm pumps, and the station will be relocated from the southwest corner of Nightingale Drive and Honey Creek Road to the southeast corner. • Rumble Lift Station (LS 30): The Rumble Lift Station is located on Rumble Road near Bay Lane. At the lift station, the two existing 950 gpm pumps will be replaced with larger pumps to increase the lift station capacity from 1.37 mgd to 2.33 mgd. 6.2.2.2 Area 3 The major projects recommended for Area 3 include the River Trunk Realignment and the River Trunk Pump Station. The 2007 Master Plan recommended improvements to the River Trunk to eliminate hydraulic capacity constraints. In 2015, the City completed a Preliminary Design Report (PDR) for improvements to bypass the capacity constraints in the River Trunk and eliminate the inverted siphons at the Dry Creek crossing near the Gallo property. To do this, the project will add a new alignment for the gravity flow section of the River Trunk and a new River Trunk pump station. The following project components in Area 3 include: • 48” Gravity Sewer along Tuolumne Blvd (Project RT-1): This project constructs 2,300 feet of 48-inch diameter gravity sewer in Tuolumne Boulevard between Neece Drive and Colorado Avenue. This segment will convey flow from the River Trunk Pump Station force mains to a new 54-inch gravity diameter sewer along Colorado Avenue. • 54” Gravity Sewer along Colorado Ave (Project RT-2): This project constructs a 4,000-foot gravity sewer with a 54-inch diameter in Colorado Boulevard between Tuolumne Boulevard and Pelton Avenue. Flows from the River Trunk and Sutter Trunk will combine at the intersection of Tuolumne and Colorado and continue south to the Sutter Plant. The pipeline’s reach will be over 30 feet deep. • Gravity Sewer along Colorado Ave to Sutter Plant (Project RT-3): This project constructs a gravity sewer with a diameter between 60 inches to 84 inches. The sewer will extend 3,300 feet south along Colorado Avenue and will terminate at the Sutter Plant. Furthermore, it will convey flows from the River Trunk, Sutter Trunk, and Shakelford Pump Station. • 21” Gravity Sewer along Tuolumne Blvd (Project RT-4): This project will convey a portion of PWWF from the Sutter Trunk to the River Trunk and is therefore considered a PWWF relief sewer. This segment consists of 1,300 feet of 21-inch diameter pipeline in Tuolumne Boulevard and will connect to the new River Trunk at Colorado Boulevard. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-15 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx • Dual Force Mains along Floodplain and Tuolumne Blvd (Project RT-5): This project constructs parallel 30-inch and 42-inch outside diameter force mains from the new River Trunk Pump Station. The force mains will run 2,600 feet from the River Trunk Pump station to a discharge structure in Tuolumne Boulevard. • Beard Brook North Gravity Alignment (Project RT-6): This project will replace the existing Beard Brook Siphon with a 48-inch diameter gravity pipeline. The pipeline will run from west of Beard Brook Park to the River Trunk Pump Station over a distance of 3,900 feet. This will eliminate the need for an inverted siphon under Dry Creek and address maintenance and odor issues associated with the siphon. • 36” and 48” Gravity Sewer: B St to Pumping Station (Project RT-7): This project constructs 36-inch and 48-inch gravity sewers that will run from Calaveras Street to the inlet of the River Trunk Pump Station. The sewers will cover a distance of 1,500 feet. • 14” Shakelford Force Main and 18” Gravity Sewer (Project RT-8): This project constructs a 14-inch diameter force main that will convey flows from the new Shakelford pump station beneath the Tuolumne River. The new force main will be inserted into a recently completed inverted siphon under Tuolumne River. Beyond the crossing, the force main will continue north through the Dryden Park Golf Course and terminate at an 18-inch diameter gravity pipeline in Roselawn Avenue. Flows will be conveyed to the River Trunk at Colorado and Pelton. • 24” Rehabilitation along Sutter Trunk (Project RT-9): Based on the results of the condition assessment, a portion of the Sutter Trunk will require rehabilitation directly upstream of the Sutter Plant. The recommended approach is to add cured-in-place pipe lining. Since much of the pipeline’s interior is inaccessible for a condition assessment, it was assumed that half of the length of the pipeline would be lined. This project is considered rehabilitation and is further discussed in chapter 8. • 48” River Trunk Rehabilitation (Project RT-10): Excessive corrosion is present in the entire reach of the River Trunk from Beard Brook to the Sutter Plant. Because of this, rehabilitation is recommended within the next five years. As such, this project is considered rehabilitation and is further discussed in Chapter 8. • River Bank Armament (Project RT-11): Riverbank armament is required to prevent future erosion and exposure in the River Trunk and CSL. This project is related to reliability and is further discussed in Chapter 8. • CSL Diversion Structure (Project RT-12): This project constructs a new diversion structure that will divert flows between the CSL and the existing River Trunk in the event of a pipeline failure. This project provides reliability to the CSL and River Trunk. As such, it is related to reliability and is further discussed in Chapter 8. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-16 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx • Shackelford Pump Station: This pump station will pump flows through a new force main under the Tuolumne River and discharge into the River Trunk. To convey the pump station will require a firm capacity of 4.2 mgd. • River Trunk Pump Station: This pump station will allow the River Trunk to be removed from the Tuolumne River bank to mitigate vulnerability to washout. To convey the pump station will require a firm capacity of 54.5 mgd. With the new alignment, the existing River Trunk will be utilized as a redundant system for the CSL and will still require rehabilitation and river bank armament to prevent washout. 6.2.2.3 Area 4 • Downtown Trunk (Project DT-1): The flow level in the trunk sewer in J Street causes the 12-inch pipeline to surcharge. Therefore, the existing pipeline will be replaced with a 15-inch diameter pipeline that extends approximately 2,400 feet from McHenry Avenue to 12th Street. • Downtown Trunk (Project DT-2): In the existing 10-inch diameter pipelines at Kimble Street and Floto Street, the modeled result in a d/D of 0.90, which exceeds the maximum d/D criteria of 0.85. Therefore, these pipelines will be replaced with approximately 1,000 feet of 12-inch diameter pipeline. 6.2.2.4 Area 5 • Santa Rosa Trunk (Project SR-4): In the existing 10-inch diameter pipelines at Coffee Road between Fairmont Avenue and Lucern Avenue, the flow level exceeds the maximum d/D criteria under PWWF conditions. This causes the pipeline to surcharge above the crown. Accordingly, the existing pipeline will be replaced with 1,600 feet of 15-inch diameter pipeline. • Rose and Celeste Lift Station (LS 29): The existing Rose and Celeste Lift Station is located on Rose Avenue and Celeste Drive. This project will increase the firm capacity from 0.86 mgd to 1.3 mgd to accommodate PWWF. 6.2.2.5 Area 6 • Empire Trunk (Project EM-1): Flow levels in the 10-inch diameter pipeline at Yosemite Boulevard and McClure Road surcharge above the crown during PWWF conditions. To mitigate surcharging, this project will replace 200 feet of the existing pipeline with a 15-inch diameter pipeline between Yosemite Meadows Drive and Garner Road. At Garner Road, the project will plug the 10-inch pipeline and tie into EM-2. Currently, this project is in the design phase, and the City has already budgeted for it independent of the Master Plan CIP. • Empire Trunk (Project EM-2): This project will divert flows from the Empire Trunk and alleviate surcharging within the 10-inch diameter pipeline located along Yosemite ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-17 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx Boulevard and McClure Road. At Garner Road, a new 18-inch diameter pipeline will extend 3,300 feet to the south and connect with an existing 39-inch diameter pipeline at Leckron Road. Currently, this project is in the design phase, and the City has already budgeted for it independent of the Master Plan CIP. • Empire Trunk (Project EM-3): This project will replace the existing 10-inch diameter pipeline in Hoover Avenue and Doherty Avenue with approximately 1,800 feet of 12- inch diameter pipeline. This improvement is required because the flow levels at PWWF conditions exceed the maximum d/D at approximately 95 percent capacity. • Empire Trunk (Project EM-4): Flow levels in the 15-inch diameter trunk in Benson Avenue between Monterey Avenue and Oregon Drive exceed the d/D criteria under PWWF at approximately 93 percent capacity. Therefore, the existing pipeline will be replaced with 1,400 feet of 18-inch diameter pipeline. • Benson Lift Station (LS 19): The existing Benson Lift Station is located on Benson Avenue between Hillside Drive and Trenary Way. This lift station has two pumps, one 150 gpm and one 500 gpm. To provide reliable capacity for current and future this project will increase the firm capacity from 0.22 mgd to 1.3 mgd. • Scenic Drive Lift Station (LS 63): Improvements to the Scenic Drive Lift Station are currently in progress and have been accounted for in the City’s existing CIP. Upgrades include replacing the three existing pumps with three 5,000 gpm pumps and installing an additional 2,800 gpm pump. In the end, this project will increase the lift station's firm capacity from 1,600 gpm to 12,800 gpm and its total capacity from 9,000 gpm to 17,800 gpm. 6.2.3 Improvements for Future PWWF Conditions As growth continues and more users contribute to the system, increased flow will potentially create additional capacity deficiencies. For this reason, the existing collection system was evaluated to also identify capacity deficiencies during at build-out of the service area. Once identified, these projects were considered capacity related and not an expansion of the system to connect future users. The sections below summarize projects that accommodate Future within the existing collection system. 6.2.3.1 Area 1 • West Trunk (Project W-1): At build-out of Area 1, the increased PWWF from new growth and infill will cause flow levels in the lower reach of the West Trunk to exceed the maximum depth criteria at approximately 90 percent capacity. The deficient pipelines extend 5,300 feet and have diameters ranging from 54 inches to 60 inches. To increase capacity within this reach of the West Trunk, a parallel 48-inch diameter pipeline is recommended. This parallel pipeline will extend 5,200 feet from Carpenter Road to Sutter Plant. This is a long-term project that will depend on growth in Area 1. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-18 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx • Woodland Lift Station (LS 39): The existing firm capacity of the Woodland Lift Station, located near the Woodland Avenue and Poust Road intersection, lacks sufficient capacity to convey build-out PWWF. For this reason, firm capacity will be increased from 20.9 mgd to 25.9 mgd. This project was carried forward from the 2007 Master Plan and will require replacing the 2,000 gpm and 3,500 gpm pumps with two 4,500 gpm submersible pumps. • Rumble Trunk (Project R-1): Under PWWF conditions, flow depths in the Rumble Trunk from Rumble Road to Maud Kump Terrace exceed the maximum d/D at approximately 89 percent capacity. For this reason, the project will require 5,100 feet of 24-inch diameter pipeline to replace 4,200 feet of existing 21-inch diameter pipeline from Claremont Avenue to Don Caster Lane. A portion of the existing pipeline alignment is in an alley and will be abandoned. The new alignment will require an additional 900 feet of 24-inch diameter pipeline to continue along Barringham Lane and connect to the existing system in Don Caster Lane. Currently, this project is in the design phase. 6.2.3.2 Area 3 • Sutter Trunk (Project S-1): The existing 16-inch diameter trunk in Jefferson Avenue between Maze Boulevard and Oak Street exceeds the d/D criteria at approximately 89 percent capacity. This project will replace the existing pipeline with 760 feet of 18- inch diameter pipeline. Since the upstream and pipelines have steeper slopes, they were not identified as capacity deficient. 6.2.3.3 Area 10 • Ustick Trunk (Project U-1): The hydraulic model indicated that PWWF from new growth will cause the Ustick Trunk to surcharge. Thus, the 12-inch diameter pipeline from Whitmore Avenue to Imperial Avenue will be replaced with 2,100 feet of 15-inch diameter pipeline. 6.3 COLLECTION SYSTEM EXPANSION TO SERVE FUTURE GROWTH The list below summarizes the recommendations for new trunk sewers and lift stations that will serve future users. The locations of the new trunk sewers and lift stations are conceptual and should be refined during the design phase. 6.3.1.1 Area 1 • West Trunk (Projects W-3 through W-4 and Dakota Avenue LS 64): These projects are recommended in the future to serve future growth within the Beckwith- Dakota and College West CPDs. To accomplish this, a new lift station and force main are required. The force main will convey flow from the new lift station to the existing ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-19 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx West Trunk on the west side of Highway 99. These projects consist of the following segments: – Project W-3 consists of 4,000 feet of 15-inch diameter pipeline from North Avenue to McDonald Avenue, where it will connect to the West Trunk. – Project W-4 consists of 8,300 feet of 6-inch diameter force main to connect LS 64 to Project W-3. The force main will be aligned parallel to Highway 99. – Because of the topography and invert elevations of the existing collection system, a lift station is required. The Dakota Avenue Lift Station (LS 64) will have a firm capacity of 0.5 mgd. • West Trunk (Projects W-6 and Kansas Avenue LS 63): These improvements will service future growth within the Highway 132 CPD. Project W-6 consists of 4,300 feet of 15-inch diameter pipeline that will connect to the West Trunk. Lift Station 63 will have a firm capacity of 1.0 mgd and will convey future flows from the Highway 132 CPD. • West Trunk (Project W-7): This project constructs 2,900 feet of 10-inch diameter pipeline in Carpenter Road and Paradise Road. This will extend the area served by the West Trunk to include existing county islands in the City’s southwest section. • Rumble Trunk (Project R-2): This sewer trunk extension will provide service to future development in the Pelandale/McHenry CPD. The project extends the sub- trunk on McHenry Avenue by 900 feet using a 10-inch diameter pipeline from Grecian Avenue that connects to the existing sewer at the intersection of McHenry and Coralwood Road. • Dale Trunk (Projects D-1 through D-5 and Chapman Road LS 60): These projects will service future growth within the Kiernan-Carver and Kiernan-Carver North CPDs and are located north of the Modesto Irrigation District (MID) Lateral 6 Canal. In the 2007 Master Plan, this area was discussed as a separate study (Kaiser Hospital Special Study, August 2004) and incorporated into the Plan as an improvement. In this Master Plan, the improvements follow a similar alignment, except the pipeline diameters have been decreased due to a reduction in estimated future flows. Improvements will consist of a lift station, force main, and gravity pipelines, which will constitute the Dale Trunk. The project consists of the following segments: – Segment D-1 consists of 1,200 feet of 15-inch diameter pipeline located in undeveloped land west of Kaiser Permanente. This pipeline extends from the proposed force main and connects to an existing 27-inch diameter pipeline. – Segment D-2 continues across undeveloped land between Chapman Road and Quinturn Lane. This segment will consist of 2,600 feet of 6-inch diameter force main. This force main is required to connect the proposed lift station to segment D-1. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-20 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx – Segment D-3 consists of 1,700 feet of 12-inch diameter pipeline in Chapman Road between Kiernan Avenue and MID Lateral 6 Canal. – Segment D-4 consists of 2,200 feet of 10-inch diameter pipeline in Chapman Road from Kiernan Avenue to south of Pirrone Road. – Segment D-5 will be a new gravity sewer that runs parallel to MID Lateral 6 Canal on the north side in an undeveloped area. This pipeline will service an area to the east of the proposed lift station and north of the canal. This reach will consist of 1,500 feet of 8-inch diameter pipeline. – A new lift station is necessary due to the area’s flat topography and the extensive length and minimum slope of the proposed pipelines. The Chapman Road Lift Station (LS 60) will have a firm capacity of 0.80 mgd to convey PWWF from the Kiernan/Carver and Kiernan/Carver North CPDs. This lift station is located north of the canal. Directly south of the proposed lift station and across MID Lateral 6 Canal are the Costco Lift Station (privately owned) and 6-inch diameter force main. The Dale Trunk project does not replace or connect to the Costco Lift Station and force main. • North Trunk (Projects N-1 through N-5): Future development within the Kiernan/Carver, Kiernan/McHenry, and Hetch Hetchy CPDs will require the construction of new trunk sewers to serve customers in the northern portion of the study area. The 2007 Master Plan proposed constructing a trunk sewer in Bangs Avenue from Carver Road to east of Coffee Road, which is shown in Figure 6.4. For this Master Plan, the alignment was not changed, but the pipeline size was reduced because future flows were projected to be lower. These proposed improvements will extend the North Trunk into the Hetch Hetchy CPD. The project consists of the following segments: – Segment N-1 consists of 2,800 feet of 27-inch diameter pipeline in Bangs Avenue between Tully Road and Carver Road. – Segment N-2 consists of 6,100 feet of 24-inch diameter pipeline along Bangs Avenue from McHenry Avenue to Tully Road. – Segment N-3 continues across undeveloped land that extends from MID Lateral 6 Canal to McHenry Road. This reach will consist of 1,600 feet of 21-inch diameter pipeline. – Segment N-4 consists of 3,100 feet of 18-inch diameter pipeline in undeveloped land from Coffee Road to MID Lateral 6 Canal. – Segment N-5 consists of 2,400 feet of 15-inch diameter pipeline in undeveloped land from east of Oakdale Road to Coffee Road. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-21 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx • North Trunk (Project N-6): This project was recommended in the Pelandale/McHenry Specific Plan (June 2006) and involves adding a lift station and a 10-inch trunk sewer located in Pelandale Avenue and Tully Road. Approximately 3,500 feet of 10-inch sewer has already been installed in Pelandale Avenue. An additional 800 feet in Tully Road is required to connect to project N-2 along Bangs Avenue. Since the conception of the Pelandale/McHenry Specific Plan, alternative alignments have been considered. Currently, the existing 10-inch diameter main in Pelandale Avenue was installed with the intent to gravity flow under the MID canal without the use of a siphon or lift station. However, the final project alignment has not been finalized and may require a lift station. In the interim, the 2007 Master Plan alignment is assumed. • North Trunk (Projects N-7 through N-9 and Keirnan LS 65): Future development within the Kiernan/Carver North CPD will require the construction of several trunk sewers and a lift station to serve future users. The North Trunk project is separated into the following segments: – Segment N-7 consists of 3,100 feet of 15-inch diameter pipeline located in American Avenue between Kiernan Avenue and Bangs Avenue. – Segment N-8 consists 5,600 feet of 10-inch diameter pipeline north of Kiernan Road from American Avenue to Carver Road. – Segment N-9 continues parallel to Kiernan Avenue between Carver Road and Stratos Way and consists of 6,300 feet of 8-inch diameter pipeline. – The proposed lift station is necessary due to the area's flat topography and the extensive length and minimum slope of the proposed pipelines. The Kiernan Avenue Lift Station (LS 65) will have a firm capacity of 0.24 mgd to convey PWWF from the Kiernan/Carver North CPD. 6.3.1.2 Area 6 • Sonoma Trunk Extension (Projects SO-1 through SO-4 and Wood Sorrel LS 61): These improvements have incorporated and modified future recommendations from the 2007 Master Plan to extend the Sonoma Trunk to the Roselle-Claribel CPD. Originally, the Master Plan recommended a large lift station near Sylvan Avenue to convey flows from the north to an existing pipeline in Wood Sorrel Avenue. This Lift station was initially recommended to avoid constructing deep sewers. However, City staff has concluded that the large lift station is not required. The lift station for this Master Plan was moved to Wood Sorrel Avenue to serve a small tributary within the southwest region of the Roselle-Claribel CPD. This project will extend the Sonoma Trunk to provide service for future growth. The following segments are included: ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-22 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx – Segment SO-1 consists of 3,300 feet of 24-inch diameter pipeline that connects to an existing 27-inch diameter trunk. The proposed trunk will continue west in Sylvan Avenue and then north along an unimproved road. – Segment SO-2 is an 18-inch diameter pipeline that extends 2,600 feet from Segment SO-1 to an area north of Mabel Avenue. – Segment SO-3 consists of 2,800 feet of 15-inch diameter pipeline that extends from Segment SO-2 to an area south of Claribel Road. – Segment SO-4 consists of 3,100 feet of 8-inch diameter pipeline that will convey flows from the southwest area of the Rose Claribel CPD. The 8-inch diameter pipeline will extend north from an existing 27-inch diameter sewer in Wood Sorrel Drive. – Because of the topography and invert elevations of the existing collection system, a lift station will be necessary to serve this area. The Wood Sorrel Drive Lift Station (LS 61) will require a firm capacity of 0.07 mgd to convey PWWF. • Lakewood Trunk Extension (Projects L-1 through L-4 and LS 67): The Lakewood Trunk Extension will service the eastern half of the Roselle-Claribel CPD by extending the existing trunk eastward from the intersection of Litt Road and Sylvan Avenue. This project consists of the following segments: – Segment L-1 is located in Litt Road and extends from the end of 21-inch diameter Lakewood Trunk, north of Sylvan Avenue. This reach will consist of 900 feet of 18-inch diameter pipeline. – Segment L-2 continues in Litt Road and consists of 1,700 feet of 15-inch diameter pipeline. – Segment L-3 consists of 800 feet of 12-inch diameter pipeline that begins in Plainview Road and runs in Litt Road. – Segment L-4 is a 10-inch diameter pipeline that extends 3,000 feet from south of Claribel Road to Plainview Road. – Because of the topography and invert elevations of the existing collection system, a lift station will be necessary to serve this area. The Litt Road Lift Station (LS 67) will require a firm capacity of 0.64 mgd to convey PWWF from the Roselle-Claribel CPD. • Lakewood Sub-Trunks (projects L-5 and L-6): This group of improvements will service business, commercial, and residential growth eastward within the Village One CPD. Project L-5 will extend an existing 15-inch diameter pipeline within the Falling Leaf Subdivision. The existing 15-inch diameter pipeline, located at the intersection of Ruffed Goose Lane and Crested Bobwhite Street, extends east beyond the development and is stubbed in an undeveloped area. A proposed 8-inch diameter pipeline will extend 300 feet and terminate in Claus Road. Project L-6 is a 10-inch ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-23 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx diameter pipeline that will extend the existing sub-trunk in Merle Avenue to serve future growth. 6.3.1.3 Area 10 • Ustick Sub-Trunks and Lift Station (Projects U-2 through U-4 and LS 62): This group of improvements will service commercial and residential growth within the Fairview CPD. This project consists of three segments and a lift station: – Segment U-2 consists of 1,000 feet of 10-inch diameter pipeline in Whitmore Avenue from Tuscan Avenue to Ustick Road. – Segment U-3 consists of 400 feet of 4-inch force main in Whitmore Avenue from Yuma Avenue to west of Tuscan Avenue. The force main will allow the proposed 10-inch diameter sewer (Segment U-2) to connect with the existing pipeline in Ustick Road. – Segment U-4 continues in Whitmore Avenue and extends from Carpenter Road to the proposed lift station near Yuma Avenue. This reach consists of 3,400 feet of 10-inch diameter pipeline. – The lift station at Whitmore and Carpenter Lift Station (LS 62) will have a firm capacity of 0.4 mgd to convey future PWWF. 6.3.2 Project Prioritization Most of the projects listed in Table 6.2 are driven by future development. When fully implemented, the capital projects will allow for unabridged conveyance of PWWF to the Sutter Plant during build-out conditions. Prioritizing the required capital improvements for the City’s sewer system is an important part of this study. Therefore, the improvement projects were prioritized in the following order: • Upgrade existing facilities to mitigate current capacity deficiencies and serve future users. • Upgrade existing facilities to accommodate increased wastewater flows associated with build-out, and construct the new trunks needed to serve future users. • Plan for pipeline rehabilitation projects to address deteriorated pipelines that have reached the ends of their useful lives. The projects were phased using available information of the City’s future development. However, implementing the improvements for future users ultimately depends on growth. For this reason, the phasing assumptions presented below are estimates, and changes in the City’s planning assumptions or growth projections may increase or decrease the priority of each improvement. Table 6.2 summarizes the phasing for capacity improvements and new growth projects, and Figure 6.5 shows the project phasing. Phasing for rehabilitation and reliability improvements is discussed in Chapter 8. ---PAGE BREAK--- April 2016 - FINAL DRAFT 6-24 pw:\\Carollo/Documents\Client/CA/Modesto/9704A00 - WW Collection/Deliverables/CH06\Draft Final - Ch06 CS.docx • Phase 1 Projects (2015-2020). Improvements targeted for Phase 1 include capacity- deficient sewers and lift stations that should be replaced in the early stages of the City’s Capital Improvement Plan (CIP). These improvements address the existing deficiencies that are considered highest priority and potentially pose the greatest risk of sanitary sewer overflows (SSOs) during The highest priority projects to address capacity deficiencies in the sewer system include: − LS # 19: Hahn Lift Station. − DT-1: J Street Trunk. − SR-4: Santa Rosa Trunk. − EM-1: Empire Trunk. − EM-2: Empire Trunk. − RT-6: Beard Brook North Gravity Alignment. − RT-7: B Street Trunk. − RT-9: Sutter Trunk Rehabilitation. − RT-10: River Trunk Rehabilitation. − RT-11: River Bank Armament. − RT-12: River Trunk/CSL Diversion Structure. − River Trunk Pump Station. • Phase 2 Projects (2021-2025). The second phase targets lower-priority existing system improvements as well as additional growth-related improvements that might be required in the near future. • Phase 3 Projects (2026-2030). The third phase addresses projects related to growth, as well as relatively minor capacity deficiencies within the sewer collection system. Deficiencies in this category are a result of build-out and do not cause the deficient pipeline to surcharge. • Phase 4 Projects (2031-2035). Similar to phase 3, the final phase addresses projects related to growth that are considered long term with little interest, as well as capacity projects. Overall, improvements to existing facilities will provide sufficient capacity to mitigate existing capacity deficiencies and to convey increased flows resulting from growth. Future development will require constructing sewers and lift stations to serve new users. ---PAGE BREAK--- ---PAGE BREAK--- R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS R7 LS KIERNAN AVE COVERT RD BACON RD BECKWITH RD NORTH AVE WOODLAND AVE MAZE BLVD CALIFORNIA AVE PARADISE RD WHITMORE AVE SHOEMAKE AVE BLUE GUM AVE KANSAS AVE STODDARD RD AMERICAN AVE TULLY RD MC HENRY AVE COFFEE RD OAKDALE RD ROSELLE AVE CLAUS RD LANGWORTH RD CARVER RD DALE RD PRESCOTT RD FINNEY RD ALBERS RD W-4 W-1 D-2 D-5 W-7 W-6 N-2 D-1 L-5 N-8 L-3 N-5 L-1 N-9 N-3 N-1 SO-2 L-6 SO-3 L-4 SO-1 U-2 N-7 N-4 N-6 L-2 U-4 U-1 W-3 S-1 EM-1 DT-2 EM-4 EM-3 DT-1 SR-4 15'' 18'' 18'' 48'' 10'' 24'' 15'' 18'' 18'' 15'' 10'' 15'' 15'' 18'' 12'' Rose and Celeste LS # 29 Benson LS 03 Rumble LS 30 Hahn LS 19 Keirnan Ave LS 65 Litt Rd LS 67 Kansas Ave LS 63 Wood Sorrel LS 61 Pelendale LS 59 Chapman Rd LS 60 Dakota Ave LS 64 12'' 15'' 18'' 21'' 15'' 24'' 10'' 10'' 15" 15'' 10'' 10'' 15'' Woodland LS 39 15'' 10'' 27'' 10'' 12'' Whitmore/Carpenter LS 62 54'' 12'' 60'' 60'' 48'' 21'' 48'' RT RT RT RT RT D-3 D-4 R-2 10'' R-1 24'' SO-4 EM-2 18'' Scenic LS 63 ?Î ?Î W-4 3 Ú 3 Ú pw://Carollo/Documents/Client/CA/Modesto/9704A00 - WW Collection/Data/MXDs/Fig 6_5_VerC.mxd CAPACITY PROJECT PHASING FIGURE 6.5 CITY OF MODESTO WASTEWATER COLLECTION SYSTEM MASTER PLAN Legend R7 LS Lift Station Phase 1 Pipeline Phase 1 R7 LS Lift Station Phase 2 Pipeline Phase 2 R7 LS Lift Station Phase 3 Pipeline Phase 3 R7 LS Lift Station Phase 4 Pipeline Phase 4 3 Ú Lift Station Sewer Main Sphere of Influence Tributary Areas Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 Area 7 Area 8/Northern Ceres Area 9 Area 10 O 0 4,000 8,000 Feet Beard Industrial Park Empire North Ceres ---PAGE BREAK---