Proposed Five Year Capital Improvement Plan (CIP) Update for FY21-FY25 Presentation to the Board of Directors April 28, 2020
CIP Projects are developed using specific criteria and the Strategic Plan as a Guiding Document.
CIP Ranking Criteria Tier 2 => Necessary Projects Tier 1 => Mandatory Projects a. Replacement Due to End of Useful Life a. Regulatory Requirement b. Facility Developed in Partnership with b. Safety Obligation c. Grant Funding Already Secured – Project Proponent Local Funding Match Requirement d. Imminent Failure Likely Tier 4 => Desirable Projects Tier 3 => Recommended Projects a. Increase Operational Efficiency a. Increase Capacity (Water or Sewer) b. Improves Reliability b. Board Policy Driven c. Improves Level of Service c. Increase Assets Useful Life d. Coordination with Project Proponent or Other Local Agency Project
Assumptions • Plans Change • Projects Often Take Longer Than Expected • Grant Opportunities Can and Do Delay High Priority Projects • Emergencies Occur Regularly
Water CIP Totals FY21-25
Sewer CIP Totals FY21-25
All Water Projects Raw water: 15 Projects $ 5.7 Million • Treated water: 3 Projects $ 0.9 Million • Distribution: 19 Projects $ 14.2 Million •
All Sewer Projects Collections: 40 Projects $ 13.2 Million • Treatment: 3 Projects $ 0.9 Million • Reclamation: 2 Projects $ 1.2 Million •
FY21 CIP Water $5.4 Million Sewer $2.2 Million FY21-25 Total CIP Water $21.6 Million Sewer $15.3 Million
Upper Columbia Ditch- Spill 1 Cost Estimate: $ 419,375 The Problem 60 foot segment of old steel pipe spans a section of unstable slope and is likely to slide down • slope This segment of ditch serves the Columbia and Big Hill Water Treatment Plants (WTP), a • population of 4,000. Water flows to the following ditches: Upper and Lower Columbia, San Diego and Matelot, • provides water to 116 raw water customers and about 60 Ditch Domestic customers The Solution The proposed solution is to grade the ditch slopes back to a more stable condition, improve the drainage, and to replace the existing pipe with larger pipe in a more stable footing. This earthwork is complex due to the nature of the steep slopes and difficult and remote access to the site. This work will require working with surrounding land owners for the construction of access roads.
Upper Columbia Spill 1 2
Upper Columbia Spill 1
Algerine Ditch- Slum Dam Repair Cost Estimate: $ 115,000 The Problem A hole has developed along the left bank of the creek immediately upstream of the • Algerine Slum Dam allowing water to undermine the existing shotcrete and flow through the Slum Dam causing significant leaking and likely erosion at several elements of the dam. The hole and leak will need to be stopped else further degradation will take place causing further damage to the dam and diversion structure. The Solution The project is to install shotcrete in and around the hole described above to prevent • leaking. Shotcrete is also proposed to be applied to areas extending from the left bank to the right bank as shown in the drawing. A keyway is to be hand dug across the creek to expose the creek bottom surface about 30 feet upstream of the dam.
Algerine Slum Dam
Eureka Ditch- Pipe Segments Back to Open Ditch Cost Estimate: $ 760,375 The Problem The Eureka Ditch segments of culvert in this area are very poorly supported by stacked rock • supports, wire tie-backs to trees and stumps that are subject to rotting. The poor condition and construction techniques and methods used in the past are indicative of • the remote location of this site. The Eureka Ditch serves water to the Ponderosa and Tuolumne Water Treatment Plant serving a • population of over 3,000 people. The water from the Eureka Ditch also flows to the Roaches Camp Ditch and serves over 90 raw • water connections and about 10 Ditch Domestic customers.
Eureka Ditch
Eureka Ditch
Eureka Ditch
Eureka Ditch
Cost Estimate: $ 760,375 Eureka Ditch- Pipe Segments back to Ditch The Solution The proposed solution is to complete a study and CEQA to build roads for access to remove old • pipe and return the ditch back to its original capacity. Returning these areas back to open ditch will ease operations in the winter due to pipes • plugging with debris or snow and ice. This will help ensure water delivery to the treatment plants and raw water customers.
Matelot Ditch- Pipeline and Turbidity Station Cost Estimate: $ 693,600 The Problem The Matelot Ditch serves the Columbia Water Treatment Plant (WTP) and is frequently • required to achieve a higher level of water treatment due to turbidity and other bacteriological contamination Due to a lack of flow control in the ditch, the ditch is operated at a flow rate that greatly • exceeds the demands of the WTP and consequently large volumes of water flow past the WTP in excess of the amount needed for downstream users
Matelot Reservoir
Matelot Ditch
Columbia WTP
Matelot Ditch- Pipeline and Turbidity Station Cost Estimate: $ 402,000 The Solution The project entails the construction of a 1690 lineal feet, 14 inch diameter, C900 PVC raw • water supply pipeline from the Matelot Reservoir to the Columbia Water Treatment Plant (WTP), currently being fed by the Matelot Ditch. By completing the project, the District will protect the source water from contamination as • well save more than 300 acre feet of water per year by matching the flow in the pipeline to the Columbia WTP demands.
New Sonora WTP Land Acquisition Cost Estimate: $ 295,000 The Problem The current WTP site does not have adequate space to construct a replacement facility. The • current facility has exceeded its useful life and is in need of replacement. The Solution In September 2018, the TUD Board adopted a siting study for the future Sonora Regional • Water Treatment Facility (WTF). A total of 4 sites were evaluated based on capital costs, neighborhood acceptance, phase ability, compatibility with external distribution system, environmental and permitting constraints, and ease of operations. The Board’s preferred location was the Ridge Site. Since that time, the property has been appraised, a purchase and sale agreement has been drafted, and staff is expecting to present to the Board a purchase and sale agreement for execution this summer.
Cost Estimate: $ 305,325 Apple Valley Sewer Lift Station Rehabilitation FY 21 Estimate: $ 233,625 The Problem The Apple Valley Sewer Lift Station is located next to Chicken Creek which in severe storm • events rises to a level which puts our Lift Station under water. The most significant level being in 2018 where there was 3 feet of water inside the building. In the past, winter storms have resulted in the loss of several pumps, a generator and the fence that surrounds the Lift station. The Solution The Lift station needs to be completely rebuilt. • This would encompass raising the site to a height where the water level would not impact the • station. Included would be two new sumps, two new pumps, a new generator, building and fence. •
Apple Valley Lift Station
Total Cost Estimate: $ 857,640 Mono Village Sewer Lift Station Consolidation FY21 Cost Estimate: $ 79,700 The Problem The Mono Village SLS is in need of a total rehabilitation. This would include a new building, • generator, sumps, check valves, vaults and pumps. The hurdle to rehabilitating this station is there is no land at the current site or near the current site that would allow this. The Solution Consolidate the current lift station and run a new gravity line down Mono Way and tie into the • existing sewer line near Hess Ave.
Mono Village Sewer Lift Station
Crossroads Sewer Lift Station Consolidation Total Cost Estimate: $ 180,000 The Problem The Crossroads Sewer Lift Station needs new pumps, sump rehabilitation, a new • control panel, new generator, and a new fence. This lift station regularly gets tagged with graffiti and needs painting. Because of the debris and rags that are deposited into this station the collection crew cleans the sump every other week. Along with cleaning the station, the pumps must be pulled every month to prevent them from faulting.
Crossroads Sewer Lift Station Consolidation Total Cost Estimate: $ 180,000 The Solution • The best course of action would be to Jack and Bore underneath Highway 108 and tie the existing Crossroads infrastructure to the system at the Law and Justice Center. This would accomplish several things. 1. The District would be able to consolidate the Crossroads Sewer Lift Station. 2. There would be more flow going to the Law and Justice Sewer Lift Station to aid in the debris removal process. 3. The debris and rags would be removed by the grinder and screen that is currently in place at the Law and Justice Sewer Lift Station.
Crossroads Sewer Lift Station
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