Aldrich, John

Mr. Aldrich has dedicated his entire 42-year career to helping communities develop and implement wet weather management strategies for separate and...

Joined:

About Aldrich, John

Mr. Aldrich has dedicated his entire 42-year career to helping communities develop and implement wet weather management strategies for separate and combined sewer systems, including facility planning in over 50 watersheds and assistance to over 200 communities with the NPDES stormwater permitting. Mr. Aldrich is a co-author of the U.S. Environmental Protection Agency (EPA) Stormwater Management Model (SWMM) and a principal author of the 2012 American Society of Civil Engineers (ASCE)/Water Environment Federation (WEF) Manual of Practice on Design of Urban Stormwater Controls.

Aldrich, John

Titles from this speaker

Description: Alternate: Prioritizing Stormwater Funding Requirements by Integrating Asset...

Alternate: Prioritizing Stormwater Funding Requirements by Integrating Asset Management and Watershed-Focused Capital Planning

Abstract

The public and their civic leaders are often unaware of stormwater until a flood or a collapsed pipe triggers an expensive emergency response. As a result, stormwater program managers often react to the latest emergency rather than proactively plan and prioritize system investments. System planning is further complicated as the diversity and complexity of stormwater management issues increases, causing decision-making to be siloed in different departments with competing objectives and funding sources. This presentation will describe a comprehensive asset management framework (Figure 1) that uses a common set of criteria to define risks associated with poor system condition and performance. This framework, in turn, may be used to define the risk-reduction achieved by different system renewal and improvement alternatives, as well as identify cost-effective alternatives benefiting public safety, community welfare, and environmental integrity. Asset management supported by an integrated risk framework provides a defensible set of criteria justifying investments across a diverse range of stormwater projects: Stormwater Assets, both constructed and natural, typically are owned by different entities, and often operated to achieve to different objectives. An asset management approach recognizes how each asset fits into an integrated stormwater system and establishes complementary owner/operator responsibilities. Level of Service (LOS) Objectives establish stakeholder expectations for how the stormwater system should protect human life, aquatic life, property, and community well being. They are typically expressed as system performance expectations; system operation, maintenance, and renewal practices; and rules governing discharges into the stormwater system. Likelihood and Consequence of Failure Criteria (Figure 2) measure deviations from LOS objectives. Once defined, these criteria may be merged through unique algorithms to establish equivalent levels of risk for different asset failure modes (e.g., structural failure, flooding, erosion, water quality impairment). Capital Planning Priorities. Desktop evaluations generate surrogate criteria to establish initial asset risk levels and identify priority areas for detailed assessment and capital planning (Figure 3). Then, detailed risk assessments involving field inspections and modeling are conducted to further define priority areas for capital planning and/or system renewal. Risk-Based Cost-Effectiveness Evaluation (Figure 4) integrates three factors the risk-reduction associated with system improvement and renewal alternatives, their life-cycle cost estimates, and other associated economic, social, and environmental benefits to define an overall cost-effectiveness score used to select a preferred alternative and prioritize and/or phase preferred alternatives for implementation.

This paper was presented at the WEF Stormwater Summit in Minneapolis, Minnesota, June 27-29, 2022.

SpeakerAldrich, John

Presentation time

10:45:00

12:15:00

Session time

10:45:00

12:15:00

Session number02

Session locationHyatt Regency Minneapolis

TopicAsset Management, Capital Planning, Stormwater

Author(s)

J. Aldrich

Author(s)J. Aldrich1

Author affiliation(s)CDM Smith1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Jun 2022

DOI10.2175/193864718825158459

Volume / Issue

Content sourceStormwater Summit

Word count14

Application of a Risk-based Asset Management Framework: What Could Go Wrong?

Abstract

CDM Smith was contracted by the City of Des Moines, Iowa to prepare a citywide stormwater master plan (SMP). The SMP was developed to provide a systematic, prioritized, and proactive framework for addressing the City’s stormwater management challenges. The SMP has consisted of two phases, including a needs assessment (Phase 1) and program planning (Phase 2). Phase 1 included a program audit, review of best practices, and identification of new practices to enhance the City’s stormwater management program, including development of a risk-based asset management framework. During Phase 2, processes identified during Phase 1 were applied to characterize the existing stormwater system and identify capital improvement projects. Overall, the SMP informs future strategies by providing actionable recommendations and processes to manage assets more efficiently. Continued evaluation of level of service objectives, public engagement, and process refinement bring life to the SMP, allowing for future adaptation.

CDM Smith developed a stormwater master plan (SMP) to provide a systematic, prioritized, and proactive risk-based framework for addressing Des Moines's stormwater management challenges. The SMP guides future actions by providing actionable recommendations, including processes to identify and prioritize capital improvement projects and financial planning to manage assets long-term. The risk-based framework is adaptable to all client's priorities and eases prioritization and communication efforts.

SpeakerStanton, Jessica

Presentation time

15:30:00

16:00:00

Session time

15:30:00

17:00:00

SessionCreative Stormwater Program Management Resources: Finance, O&M, and Asset Management

Session locationRoom S505b - Level 5

TopicIntermediate Level, Public Communication and Outreach, Stormwater and Green Infrastructure, Utility Management and Leadership

Author(s)

Stanton, Jessica

Author(s)J. Stanton 1; E. Wellen 2 ; J. Aldrich 3; C. Johnson 4; D. Giesy 2; T. Gardner 5; A. Wagner 5; J. Stanton 1;

Author affiliation(s)CDM Smith 1; CDM Smith 2 ; CDM Smith 3; CDM Smith 4; CDM Smith 2; CDM Smith 5; CDM Smith 5; CDM Smith 1;

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2023

DOI10.2175/193864718825159020

Volume / Issue

Content sourceWEFTEC

Word count12

Description: Enhancing Regional Collection System Resilience through Collection System Mortality...

Enhancing Regional Collection System Resilience through Collection System Mortality Projections

Abstract

Many gravity collection systems installed in the 1970’s and earlier, particularly those composed of vitrified clay pipe, are entering a period of rapidly accelerating pipe failures, getting closer to the end of their expected service life with rapidly escalating costs and increasing risk of system failures. Seven special purpose Districts and three Cities used pipe life expectancy curves as a cost-effective “first-step” towards projecting near-term and long-term asset management needs and developing resilient renewal strategies. The goal is to achieve and sustain timely system renewal and resilience through measures that restore the full structural integrity of the sewer, achieved either by full replacement or CIPP lining of the gravity sewer main and a fraction of the associated sewer manholes and laterals. The findings of this study inform each District/City on their individual requirements to ‘catch-up’ with deferred system renewal needs and define consistent, long-term levels of annual renewal.

SpeakerAldrich, John

Presentation time

09:10:00

09:30:00

Session time

08:30:00

09:30:00

SessionLeveraging Digital Solutions for Linear Assets

Session number322

TopicIntelligent Water, Utility Management and Leadership

Author(s)

J. AldrichB. Cully

Author(s)J. Aldrich1; B. Cully2;

Author affiliation(s)CDM Smith, OH1; CDM Smith, SC2

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2020

DOI10.2175/193864718825157860

Volume / Issue

Content sourceWEFTEC

Word count11

Description: Frameworks for Managing Diverse Risks within Constructed and Natural Stormwater...

Frameworks for Managing Diverse Risks within Constructed and Natural Stormwater Assets

Abstract

Stormwater program managers are increasingly embracing risk-based protocol for defining appropriate levels of capital and operational investments. This paper presents a foundational framework for managing risks associated with stormwater management, supported by examples of asset management programs being implemented by several stormwater programs throughout the United States and emerging standards for federal investments in stormwater infrastructure.

Stormwater program managers are increasingly embracing risk-based protocol for defining appropriate levels of capital and operational investments. An asset management program for stormwater systems, which are composed of constructed and natural assets, comes with unique challenges not encountered by other utilities, such as balancing structural, flood, erosion, habitat, and pollution risks and recognizing asset ownership by multiple parties. This paper presents a foundational framework for managing risks associated with stormwater management, supported by examples of asset management programs being implemented by several stormwater programs throughout the United States and emerging standards for federal investments in stormwater infrastructure.

SpeakerAldrich, John

Presentation time

14:00:00

14:30:00

Session time

13:30:00

15:00:00

SessionSetting the Groundwork for Success in Your Asset Management Program

Session number104

TopicAsset Management, Intelligent Water, Resilience, Disaster Planning and Recovery

Author(s)

John Aldrich

Author(s)J.A. Aldrich1; J. Claus2;

Author affiliation(s)CDM Smith, Cleveland, OH1CDM Smith, Manchester, NH2

SourceProceedings of the Water Environment Federation

Document typeConference Paper

PublisherWater Environment Federation

Print publication date Oct 2021

DOI10.2175/193864718825157995

Volume / Issue

Content sourceWEFTEC

Word count12

Base text size -

Aldrich, John

About Aldrich, John

My Recent Activity