Santa Ana Watershed Project Authority Inland Empire Brine Line

124 Pages·2013·16.23 MB·English

Santa Ana Watershed
Project Authority
Inland Empire Brine Line Reach V
Pipeline Condition Study
Final Report

Prepared by:

May 10, 2013
May 2013
Table of Contents
Executive Summary………………………………………………………………………..……………i
ES-1 Purpose of Report………………………………………………………………….………i
ES-2 Risk Assessment Findings……………………………………………..…………….….i
ES-3 Project Recommendations………………………………………………………………ii
ES-4 Summary of Project Costs…………………………………………………...…………iii

Section 1 Introduction…………………………………………………………………..…………….1
Section 2 Background and Project Location………………………………………….………….1
Section 3 Existing Conditions along the Alignment……………………………………….……4
3.1 Geotechnical Conditions…………………………………………………………………...4
3.1.1 General Site Soil Characterization………………………………………………………..4
3.1.2 Existing Pipe Depth………………………………………………………………………...5
3.1.3 Test Pit Soil Data…………………………………………………………………...………6
3.1.4 Pipe Ovality………………………………………………………………………………….7
3.2 Existing Utilities……………………………………………………………………………..9
3.3 Land Use and Key Areas……………………………………………………..……….....10
3.4 Traffic and Roadway Usage……………………………………………………………..10
3.5 Environmental Factors……………………………………………………………………12
3.6 System Hydraulics…………………………………………………………………...……14
3.6.1 System Hydraulics Overview………………………………………………………….....14
3.6.2 Surge Analysis………………………………………………………………………...…..17
3.6.3 Reach V Existing System Hydraulic Characteristics……………………………....….17
Section 4 Risk Assessment Summary…………………………………………...………………22
4.1 Risk Based Approach…………………………………………………….………………22
4.2 Risk Assessment Results…………………………………………………………..…….23
Section 5 Rehabilitation Options Evaluated for Short and Long-Term Projects……...….31
5.1 Pressure Grouting…………………….…………………………………………………..31
5.2 Tight Fit HDPE Lining………………………………………………………………...…..32
5.3 Pipe Bursting………………………………………………………………………………32
5.4 Open Cut Replacement…………………………………………………………………..32
5.4.1 General Description…………………………………………………...………………….32
5.4.2 Construction Impacts………………………………………………….………………….33
5.4.3 Hydraulic Impacts…………………………………………………………………………33
5.5 Pressure Cured-In-Place Pipe Lining……………………………….…………………..34
5.5.1 General Description………………………………………………………………………34
5.5.2 Construction Impacts……………………………………………………………………..34
5.5.3 Hydraulic Impacts…………………………………………………………………………37
Section 6 Maintenance Access Structures, Isolation Valves, and Air/Vacuum Valves.…49
6.1 Maintenance Access Structures…………………………………………………………49
6.2 Isolation Valves……………………………………………………………………………49

May 2013
6.3 Air/Vacuum Valves………………………………………………………………………..51
Section 7 Near, Short, and Long-Term Project Recommendations……………...…………54
7.1 Recommendations Summary………………………………………...………………….54
7.2 Hydraulic Impacts…………………………………………………………………….…...61
7.3 Impact to Existing Utilities………………………………………..………………………61
7.4 Traffic Impacts…………………………………………………………………………….62
7.4.1 General Permitting Requirements…………………………………...………………….62
7.5 Residential and Commercial Impacts…………………………………………………..62
7.5.1 Local Traffic………………………………………………………………………………..62
7.5.2 Noise………………………………………………………….…………………………….63
7.5.3 Impacts to Local Businesses…………………………………………………………….63
7.6 Anticipated Construction Easement Requirements……………………………...……63
Section 8 Project Phasing and Implementation………………………………………………..64
8.1 Near-Term Maintenance Access Structure Installation Project…………………......64
8.1.1 Recommended Phasing………………………………………………………………….64
8.1.2 Brine Flow Management……………………...………………………………………….65
8.1.3 Anticipated Down Time for Customers…………………………………………………65
8.1.4 Construction Duration………………………………………… …………………………66
8.2 Short-Term Pressure CIPP Lining Rehabilitation Project…………………………….67
8.2.1 Recommended Phasing………………………………………………………………….67
8.2.2 Bypass Pumping…………………………………………………………………………..67
8.2.3 Anticipated Down Time for Customers……………………………………...………….68
8.2.4 Construction Duration…………………………………………………………………….68
8.3 Long-Term Pressure CIPP Lining Rehabilitation Project………………………….....69
8.3.1 Recommended Phasing………………………………………………………………….69
8.3.2 Bypass Pumping…………………………………………………………………………..69
8.3.3 Anticipated Down Time for Customers……………………………………………...….69
8.3.4 Construction Duration…………………………………………………………………….69
8.4 Overall Project Implementation Schedule……………………………………………...70
Section 9 CEQA Documentation…………………………………………………………………..72
Section 10 Construction Costs for Recommended Projects…………………………………..74
10.1 Accuracy………………………………………………..………………………………….74
10.2 Benchmark…………………………………………………………………………………74
10.3 Unit Cost Basis…………………………………………………………………………….74

May 2013
List of Tables
Table ES - 1: Risk Assessment Results……………………………………………………………..i
Table ES - 2: Summary of Project Recommendations……………………………….…………..ii
Table ES - 3: Summary of Project Costs…………………………………………...………………iii

Table 1: Compaction Test Results at 11 Test Pits……………………….……..….……..…..7
Table 2: Pipe Ovality Measured at 11 Test Pits……………………………………...…..…….8
Table 3: Summary of Current Daily Average Flows from EMWD Lateral………….…….14
Table 4: Summary of Pipe Segment by Contract…………………………………………....22
Table 5: Categorization of Risk Assessment Results…………………..……….……….…24
Table 6: Pressure CIPP Productivity………………………………………....………………...37
Table 7: Values Used in Calculating Pressure CIPP Lining Thickness………..……..….38
Table 8: Summary of CIPP Pressure Lining Impacts on the Brine Line…………..….….40
Table 9: Existing Air, Vacuum, and Combination Valves on Reach V of the Brine
Line…………………………………………………………………………………………51
Table 10: Recommendations for Valve Retrofit or Replacement……………….………..…51
Table 11: Comparison of Existing and Recommended Air Release Valve Dimensions..53
Table 12: Known Existing Utilities in the Vicinity of Planned MAS Locations………...…61
Table 13: Construction Steps for Concurrent Installation of Two MAS Structures..……66
Table 14: Anticipated Construction Duration for Short-Term Pressure CIPP Lining
Rehabilitation Project……………………………………………………………….…..69
Table 15: Anticipated Construction Duration for Long-Term Pressure CIPP Lining
Rehabilitation Project……………………………………………………………..……70
Table 16: Summary of Estimated Conceptual Level Construction Costs for Near, Short,
and Long-Term Projects……………………………………….………………….…..74
Table 17A: Near-Term Conceptual Level Construction Cost Estimate……………………..76
Table 17B: Maintenance Access Structure Cost Estimate Detail for Near-Term
Project..……………………………………………………………………………….….77
Table 18: Short-Term Conceptual Level Construction Cost Estimate………………….…78
Table 19: Long-Term Conceptual Level Construction Cost Estimate…………...………..79

List of Figures

Figure 1: Inland Empire Brine Line………………………………………...……………………2
Figure 2: Brine Line Reach V, Contracts II and III…………………………………………….3
Figure 3: Commercial/Roadway Development along Reach V in the Last 12 Years.......6
Figure 4: Contracts II/III Land Use and Key Areas……………………………..……………11
Figure 5: Flora and Fauna Habitat Areas along Reach V……………………………...…...13
Figure 6: EMWD Brine Line Lateral and Reach V Pipeline…………………………………16
Figure 7: Existing System, 3.25 MGD, Pressures on Reach II and III and Area of
Concern Contract IV………………………………………………...…………....…..18

May 2013
Figure 8: Existing System, 3.25 MGD, Velocities on Reach II and III and Area of
Concern Contract IV…………………………………………………………….…….19
Figure 9: Existing System, 11 MGD, Pressures on Reach II and III and Area of Concern
Contract IV…………………………………………………………………………...…20
Figure 10: Existing System, 11 MGD, Velocities on Reach II and III and Area of Concern
Contract IV………………..………………………………………….………………....21
Figure 11: Reach V High Risk Segment Project Drivers..……………………………………25
Figure 12: Basis for Recommended Short-Term Project, Contracts II and III………..….26
Figure 13: Basis for Recommended Long-Term Project, Contracts II and III……...…….27
Figure 14: Basis for Recommended Short-Term Project, Contract IV………..…………..28
Figure 15: Basis for Recommended Long-Term Project, Contract IV………..………...…29
Figure 16: Combined Long and Short-Term Projects, Contracts II, III, and IV……..……30
Figure 17: Access Pit Detail………………………………………………………………………35
Figure 18: Short-Term Project, 3.25 MGD, Pressures on Contracts II, III, and IV.…..…..41
Figure 19: Short-Term Project, 3.25 MGD, Velocities on Contracts II, III, and IV……..…42
Figure 20: Short-Term Project, 11 MGD, Pressures on Contracts II, III, and IV…..…......43
Figure 21: Short-Term Project, 11 MGD, Velocities on Contracts II, III, and IV…..….…..44
Figure 22: Long-Term Project, 3.25 MGD, Pressures on Contracts II, III, and IV.…...…..45
Figure 23: Long-Term Project, 3.25 MGD, Velocities on Contracts II, III, and IV…...……46
Figure 24: Long-Term Project, 11 MGD, Pressures on Contracts II, III, and IV……….....47
Figure 25: Long-Term Project, 11 MGD, Velocities on Contracts II, III, and IV…………..48
Figure 26: Maintenance Access Structure Detail………………………………….………..50
Figure 27A: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Contracts II and III…………………………………….55
Figure 27B: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Contracts II and III…………………………………….56
Figure 27C: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Contracts II and III…………………………………….57
Figure 27D: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Contracts II and III…………………………………….58
Figure 27E: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Area of Concern, Contract IV…..………..………….59
Figure 27F: Approximate Planned Location of Maintenance Access Structures, Isolation
Valves, and Access Tees Area of Concern, Contract IV……………………….60
Figure 28: Potential Construction and Permanent Easement Locations…………………64
Figure 29: Overall Suggested Implementation Schedule for Near, Short,
and Long-Term Projects……………………………………………………………..73

Appendices
Appendix A - Summary of Utility Information
Appendix B - Final Reach V Surge Analysis Report
Appendix C - Detailed Breakdown of Risk Assessment Results
Appendix D - Inventory of Existing Air Valves on Reach V
Appendix E - Cost Estimate Unit Cost Criteria

May 2013
May 2013
May 2013
Santa Ana Watershed Project Authority Inland Empire Brine Line Reach V Executive Summary
Pipeline Condition Study Project
FINAL
Executive Summary
ES-1 Purpose of the Report
On October 18, 2011, a brine spill was reported on Reach V (Contract II and III) of the Inland Empire
Brine Line (Brine Line) near the intersection of Temescal Canyon Road and Cabot Road in the City of
Corona. The condition of the pipe in this location raised concern over the quality of construction and
structural integrity of the entire Reach V pipeline with specific emphasis on Contracts II and III where the
spill was located.
The purpose of this Condition Study is to provide a pipeline condition study of Reach V (Contract II and
III) and other known areas of concern in Contracts IV and V including a risk assessment and surge
analysis. This study will define the limits of needed repair work and recommend appropriate
rehabilitation and/or replacement methods for specific locations of highest risk along the alignment. In
addition, a budgetary construction cost estimate is provided for the recommended alternatives to allow
SAWPA to prudently budget the work.
ES-2 Risk Assessment Findings
A risk based approach was used in order to prioritize condition assessment and capital improvement
project (CIP) activities. The total Risk per pipe segment was calculated by summing up the Likelihood of
Failure Factor scores and multiplying that number by the weighted Consequence of Failure Factor scores.
The result was a risk score per pipe segment. The resulting risk scores were then categorized based on
risk value and placed in the following categories:
Table ES-1. Risk Assessment Results
Length of
Pipe in Length of Pipe
Contracts in Contracts IV
Risk Risk CIP Project Project II and III and V areas of Total Length
Category Score Definition Timeline (ft.) concern (ft.) of Pipe (ft.)
Short-Term
High Risk >= 50 Project (1) 0-3 years 11,954 876(3) 12,830
Medium Long-Term
Risk >=20<50 Project (2) 4-10 years 6,334 1,873(3) 8,207
Low Risk <20 No Project N/A 8,353 11,404 19,757
Total: 26,641 14,153 40,794
(1) In order to facilitate construction packaging, some medium and low risk pipe segments were added to the short-term
project.
(2) In order to facilitate construction packaging, some low risk pipe segments were added to the long-term project.
(3) Numbers shown are for area of concern in Contract IV only. There are no required projects for the area of concern in
Contract V.

May 2013 i
Santa Ana Watershed Project Authority Inland Empire Brine Line Reach V Executive Summary
Pipeline Condition Study Project
FINAL
ES-3 Project Recommendations
Table ES-2 provides a summary of project recommendations for Reach V, Contracts II and III as well as
areas of concern in Contract IV. Please note that no projects were recommended for the area of concern
in Contract V. Recommendations were developed based on:
1. A risk assessment as is described in Section ES-2;
2. A surge analysis of Reach V; and
3. A rehabilitation alternatives analysis including a hydraulic analysis of the existing and future
rehabilitated Brine Line
Table ES-2. Summary of Project Recommendations
Project Anticipated Schedule Description
Near-Term  Install 26 Manhole Access Structures
Manhole Access
 Install 26 Plug isolation valves
Structure Prior to Short-Term Project
 Install 26 Access tees for future bypass pumping
Installation
Project
 Pressure CIPP Line approximately 12,000 feet of
24-inch PVC pipe in Reach V, Contracts II and
Short-Term III
Pressure CIPP
Within 3 years from start of  Pressure CIPP Line approximately 900 feet of
Lining
Fiscal Year 2013/2014 24-inch PVC pipe in Reach V, Contract IV
Rehabilitation
 Replace or modify 11 existing air release valves
Project
(CLA-Valve and ARI models)

 Pressure CIPP Line approximately 6,300 feet of
24-inch PVC pipe in Reach V, Contracts II and
Long-Term III
Pressure CIPP
4-10 years from the start of  Pressure CIPP Line approximately 1,900 feet of
Lining
Fiscal Year 2013/2014 24-inch PVC pipe in Reach V, Contract IV
Rehabilitation
 Replace or modify 45 existing air release valves
Project
(Crispin and Valmatic models)

In developing these recommendations, the evaluation included consideration of factors such as:
 Impacts to upstream dischargers
 Construction impacts
 Adjacent utilities
 Flow by-pass requirements
 Environmental impacts

May 2013 ii