Anderson & Associates has been providing municipalities with mapping, planning, and design of stormwater systems for over 20 years. This experience combines the ability to map and document existing systems, determine the adequacy and future needs of a system, plan improvements to the system and potential funding opportunities, design of final construction plans, and construction administration and inspection through completion of the project. This experience is enhanced with our investment and interest in technology and provides our clients with innovative tools, such as real-time GPS and Geographic Information Systems to assist in the development and maintenance of these systems.
Anderson & Associates has provided stormwater management studies to many municipalities and state organizations. We have extensive experience with SWMM, Sybernet, and TR-55 computer programs which are designed for stormwater modeling. As design consultants for the Virginia Department of Transportation, Anderson & Associates is familiar with standard hydraulic design procedures and techniques. We are also involved in combining stormwater management with GIS to produce a system that can be continually updated and can be used for utility management and pro-rata cost sharing. Following are some representative hydraulics and hydrology projects:
Campuswide Stormwater Master Plan
Client: Virginia Tech
326 Burruss Hall
Blacksburg, Virginia 24061
Anderson & Associates prepared a Master Plan for proposed drainage improvements in two of the three major watersheds on campus. The proposed improvements include major improvements and upgrades to existing stormwater conveyance facilities, new stormwater conveyance facilities, and a proposed regional stormwater management basin. The proposed improvements will reduce the risk of additional flood damage to several buildings on campus and will also reduce the peak runoff rates on downstream properties.
View Pictures from this Project: Image 1 | Image 2
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Forest Park Drainage Study
Client: City of Roanoke
215 Church St., Suite 162
Roanoke, VA 24011
The project includes surveying the location of existing visible features of the water and sanitary sewer systems. Hydraulic modeling will be used to identify deficiencies in the existing sanitary sewer system (overflows, backup, etc.) and preliminary designs to correct those deficiencies will be developed. Construction cost estimates will be prepared and priorities for implementing the system improvements will be prepared. The project area is the Forest Park Watershed (also known as Horton Branch).
This project also includes surveying the location of existing storm drainage system features. Hydraulic and hydrologic modeling will be used to identify deficiencies in the existing system(surcharging, street flooding, property damage, etc.) and preliminary designs to correct these deficiencies will be developed. Construction cost estimates will be prepared and priorities for implementing the system improvements will be developed for the Forest Park Watershed.
Anderson & Associates is providing a conceptual design of drainage improvements required to provide a watershed-wide storm drain/open channel system with a 10-year capacity, followed by the Preliminary Design and then the Final Design Phase, which will include full design drawings, contract specifications and documents, easement plats, and a detailed cost estimate.
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Flood Plain Study
Client: Town of Warrenton
P.O. Drawer 341
Warrenton, Virginia 20188
Study included the following tasks:
- Data Collection: Review of previous surveys and HEC-2 analysis to determine the feasibility of re-using existing data to augment the project.
- Hydrologic Analysis: Review of previous rainfall data as well as previous hydrologic models to determine potential re-use of information. Developed a new digital hydrologic model for use in this study.
- Hydraulic Analysis: Re-visited the existing HEC-2 model and revised based on existing conditions. A new model was developed and an appropriate report was prepared for use in providing a letter of map revision.
- LOMR Preparation: Preparation of, for Town approval and signature, a letter of map revision to be sent to FEMA requesting the update of the flood map as indicated by the results of the study.
View a Map for this Project
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Stormwater Design
Client: Henry County Kings Mountain Road
Collinsville, VA 24078
The purpose of this study was to evaluate approximately 5000 linear feet of Daniels Creek located in a residential area in Collinsville, Virginia. The extent of the project area was from approximately 1000 feet down stream of the Route 1142 bridge to the Wheeler Avenue Bridge. The creek was approximately 8 feet to 12 feet wide and the typical bank slope was severe (1:1 slope or greater). In many areas the creek bank was failing and being eroded away by the creek.
This study evaluated different alternatives to alleviate the bank failure and decrease the amount of additional sediment introduced into the creek. The alternatives evaluated and recommendations were based on providing the stabilization within the boundaries of the proposed easement.
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