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61

Significance of Field Inspections and Application of Findings

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Modeling stormwater facilities accurately in hydraulic programs depends greatly on facility specific characteristics, including stage-storage and elevation-discharge curves. It is typically assumed that these facilities are in ‘good’ operating condition with full design capacity. True field conditions, however, may uncover factors prohibiting these facilities from achieving true design capacities. It is imperative that best management […]

62

Stepping Out From Behind the Desk: A Look Into Stream Restoration Construction Oversight

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Alex C. Lucado[1], PE, CFM Timmons Group Katie Atkinson2, PE Timmons Group   There are many design components and individual roles within a water resources project. Most of the professionals serving in these roles are adept at solving problems behind a computer screen. However, overseeing project construction can present these individuals with an array of […]

63

Bringing Environmental and Stormwater Benefits to a Tidal Channel

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Timmons Group is providing drainage and environmental improvement services to reduce water impacts and minimize safety concerns along a channel in Hampton, VA. The waterway currently flows through an old concrete channel that is in disrepair in several sections and is bordered with sites that have old concrete and construction debris buried. The City recognized […]

65

What’s The Big Difference? – A Descriptive Analysis of Common Hydrologic Modeling Programs

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One of the first actions when evaluating a design is to select a hydrologic modeling program that evaluates the runoff-storage relationship within a contributing watershed. Sometimes this selection is made quickly without significant consideration of the end goal, or whether model results are comparable between different hydrologic programs. In theory, modelers can employ various hydrologic […]

67

Lake Barton – Improvements to Aging Infrastructure

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Fairfax County’s dam safety program recently identified a localized wet area on the downstream slope of Lake Barton, one of the County’s state regulated dams which was originally constructed in 1978.  This presentation will cover the steps taken by the County to monitor, investigate, evaluate, and develop remediation plans to address the wet spot, replace […]

68

Total Maximum Daily Load Development and Implementation: Models, Methods, and Resources

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American Society of Civil Engineers (ASCE)-Environmental and Water Resources Institute’s (EWRI) Total Maximum Daily Load (TMDL) Analysis and Modeling Task Committee is releasing a new Manual of Practice (MOP) No. 150 on TMDL Development and Implementation: Models, Methods, and Resources in February/March 2022. The MOP was written by members of the Task Committee, edited by […]

69

Lessons Learned from Updating a Stormwater Master Plan

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C.J. Bodnar, P.E.1 City of Virginia Beach When completing Stormwater Master Plans (SWMP) and formulating stormwater infrastructure improvement projects, municipalities and their consultants frequently face the difficult decisions of selecting an appropriate technical approach, developing infrastructure projects, and establishing criteria for prioritization of projects.  Over the last 5 years, the City of Virginia Beach has […]

70

Aging Sustainably and Effectively: Evaluating the Long-Term Performance of Proprietary Biofiltration

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There are few things in life that age well; cheese and wine show great balance, structure and complexity as they age, and more so when paired together. Without having to sacrifice overall performance, it would be great to expect similar traits from our stormwater best management practices (BMPS), particularly green infrastructure practices like bioretention and […]