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Stormwater Management
Responsible stormwater management can make the difference between
dangerous flash flooding and controlled water containment, between
a clean and plentiful water supply and one that is depleted by pollution
and displacement. A crucial balance exists between the preservation
of natural hydrologic systems and the development of sites that are
safe for human use. When this balance is achieved, both the environment
and people win.
Timmons Group works with public and private clients to develop stormwater
management programs and evaluate stormwater best management practice
(BMP) options. Our civil engineers have experience implementing Low
Impact Development (LID) measures for public facilities. Timmons Group’s
experience includes comprehensive watershed management studies incorporating
the most progressive BMP technologies and LID practices available.
Our stormwater management group has experience with many civil engineering
design issues related to stormwater management including dam design,
inspection and rehabilitation; stream restoration; and designs to
mitigate safety issues and the control of wildlife and invasive vegetation
near BMPs.
Working with our residential and site development teams, our stormwater
professionals are dedicated to developing sites that are sensitive
to low impact and sustainable development as well as functional and
comfortable for human use. Utilizing the latest technologies and incorporating
them into our sites, we not only design sites that are responsible
and sustainable but functional as well.
For more information about Timmons Group's Stormwater Management services, contact Andrew Gould at 804.433.2982 or andrew.gould@timmons.com.
Our Focus:
Project Profiles:
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Magnus Lane Drainage Project
Henrico County, VA
Timmons Group designed approximately
2,000 linear feet of bioengineering stream channel improvements
to solve erosion and flooding problems. Timmons
Group also negotiated environmental permits from the US Army Corps
of Engineers.
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Spring Branch Pond Dam Renovations
King & Queen County, VA
Timmons Group was contracted to design
the repairs necessary for upgrading the dam. Hydrologic analysis of the contributing
watershed was performed as well as a hydraulic analysis of the existing
spillway that determined the existing spillway would not require
upgrades in order to pass the 100-year or 1/2 PMF storm flows. Timmons
Group prepared design plans to address the seepage area at the downstream
toe and steep slopes along the downstream face. |
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Wellesley Shoreline Stabilization
Henrico County, VA (2004)
Timmons Group performed an alternatives analysis
to evaluate several different types of shoreline stabilization techniques
such as bioengineering, cable concrete, riprap, retaining wall and
sheet piles. Wellesley’s
Homeowners Association chose a combination of bioengineering and
riprap stabilization for the shoreline. Timmons Group designed
and bid the project showing riprap and bioengineering stabilization
for the shoreline as well as a sediment forebay, sidewalks and a
boat access ramp. Geotechnical support, environmental permitting,
survey and an irrigation feasibility study was also completed for
this project. |
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Town of Culpeper Watershed Protection Ordinance
Culpeper, VA
Timmons Group reviewed the draft ordinance,
and provided technical guidance on development of the Watershed
Protection Overlay District Ordinance to protect Lake Pelham,
the Town’s primary drinking
water supply. Timmons Group was responsible for reviewing all
aspects of the proposed ordinance including the Best Management Plan
Policy and engineering calculations to ensure the goals of the Town
would be met. |
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Longwood University Stormwater Management
Master Plan
Farmville, VA
Timmons Group analyzed the central drainage
conveyance system on campus from a hydraulic perspective to ensure
adequate capacity during design rainfall events and all impervious
surfaces on University property were calculated for existing
and future use conditions to determine the volume of water quality
mitigation necessary to keep pace with planned developments. The final product was a report
documenting the process undertaken and making recommendations for
current and future rainfall-runoff needs of the University. Additionally,
a final phase of this project included the design of a water quality/water
quantity mitigation facility(ies) that would allow the University
to continue with planned development in accordance with State requirements. |
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