WATER RESOURCES PORTFOLIO
INTRODUCTION Firm History
Integrated Science & Engineering (ISE) was incorporated in 1977 as a civil engineering and land surveying firm. The firm provided engineering services primarily in site development and transportation for the first 19 years. In 1996, the firm endeavored to specialize in water resource projects for municipalities. This effort included increasing our engineering services for stormwater programs and projects, as well as water/wastewater infrastructure design. Over the last 15 years ISE has assembled a diverse and well-qualified group of professionals that are well suited and positioned to work for small to medium sized communities. While differentiating ourselves in the water resources market, we have maintained our roots in site development and roadway projects. The firm has extensive experience in rebuilding, restoring, renovating, and modernizing aging water / sewer, stormwater and transportation infrastructure, as well as planning and designing of new municipal facilities and land development projects. This experience has given our staff the ability to perform as an extension of our client’s staff while fully understanding each client’s needs. Additionally, senior leadership from the firm have over 20 years of professional experience working on transportation related projects including traffic studies, signalization and intersection improvements, and roadway design. Team members are certified, qualified and experienced in the Georgia DOT LAP and PDP process. ISE’s staff of 25 includes planners, technicians, engineers, surveyors and administrative staff. Our firm’s experience reflects the integration of all these services. With a diverse in-house team of dedicated and experienced professionals, ISE offers innovative solutions to each client. The company has successfully provided consulting services for hundreds of private clients, as well as over 50 public sector clients in Georgia.
ISE has been at the forefront of municipal stormwater management for the past 15 years. Based on our experience, it could be said that ISE is one of the leading water resources consulting firms in Georgia for small to medium size local governments facing stormwater management challenges. ISE has provided varying levels of consulting and compliance assistance to 15 NPDES Phase I communities and 20 NPDES Phase II communities (approximately 25% of the total) in Georgia over the last several years. Our firm’s extensive experience enables us to provide a seamless integration of all program elements to address stormwater management issues.
Stormwater Management ISE has successfully completed a variety of floodplain management/protection, stormwater management and watershed masterplanning related projects over the last 15 years. This work has included extensive work in the watershed masterplanning area, including hydrologic and hydraulic (H&H) analysis, floodplain mapping, future floodplain mapping, and capital improvement program (CIP) planning and project design. In addition, this work has included extensive work in the MS4 inventory and regulatory compliance areas, as well as stormwater management program (SWMP) development and implementation.
INTRODUCTION Professional Services
ISE has successfully implemented project / program management, engineering design, surveying, and construction management services for clients on a wide range of projects. The diversity of in-house services offered by ISE enables us to work with each client from initial project planning through design and construction. The unique abilities of our staff professionals also enables us to service a wide variety of client types while providing the necessary level of expertise for each project to ensure its overall success. ISE’s technical strength and in-depth experience in the areas of stormwater management and water / wastewater / utility engineering, as well as the more traditional areas of civil engineering and surveying is shown below:
Stormwater Management • • • • • • • • • • • • • •
Culvert / Storm Sewer System Design Stormwater Management Facility Design Water Quality BMP Design Construction Plan Development / Cost Estimating Easement / Right-of-Way Acquisition National Pollutant Discharge Elimination System (NPDES) Stormwater Permit Consulting Services Water Planning District Compliance Assistance Georgia Environmental Protection Division (EPD) Liaison Consulting Services Stormwater Masterplanning / Hydrologic & Hydraulic Analyses Watershed Assessments / Watershed Protection Strategies Water Quality Monitoring Construction Administration Stormwater Program Funding Strategies / Procurement Stormwater Utility Consulting
Water / Wastewater / Utility Engineering • • • • • • • • • •
Water / Wastewater Conveyance System Planning / Design / Construction Water / Wastewater Treatment Facility Planning / Design / Construction Water / Wastewater Infrastructure Rehabilitation Sewer System Flow Monitoring & Data Analysis Hydraulic Computer Modeling Master Utility Planning Reclaimed Water Systems Permitting GIS for Utility Systems Water / Sewer Rate Studies
Revenue Bond Engineering Studies
Civil Engineering • • • • • • • • • • • • • • • • • •
Site Design Intersection Design Roadway Design Right-of-Way Plans Site Planning & Design Project Specifications Erosion & Sedimentation Control Plans Site Grading & Analysis Utility Plans & Profiles Landscape & Irrigation Plans Construction Details Geotechnical Engineering Environmental Assessments Easement & Right-of-Way Acquisition Construction Materials Testing Construction Oversight / Administration Surveying Geographic Information Systems (GIS)
INTRODUCTION Representative Water Resource Clients
ISE has been in continuous operation for the past 36 years providing professional consulting services. This work has included extensive experience in the local government arena. This experience combined with the firm’s 36year background in land development allows our staff to collaborate on municipal projects to ensure that water quality / quantity and civil design are addressed in a comprehensive manner. Following is a representative listing of our local government clients and utility purveyors for whom we are currently providing or have provided water / sewer system consulting / design services and/or stormwater management. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
Barrow County Brunswick-Glynn Joint Water & Sewer Authority Chatham County Cherokee County City of Albany City of Alpharetta City of Berkeley Lake City of Centerville City of Dacula City of Dalton City of Duluth City of Fairburn City of Fayetteville City of Fayetteville Water Department City of Johns Creek City of Lawrenceville City of Newnan City of Norcross City of Peachtree City City of Perry City of Pooler City of Roswell City of Snellville City of Sugar Hill City of Suwanee City of Tunnel Hill City of Varnell City of Warner Robins Clayton County Water Authority Coweta County Dalton Utilities Dougherty County Glynn County Hall County Houston County Monroe County Newton County Peachtree City Water & Sewerage Authority Rockdale County Whitfield County
SELECTED PROJECT EXPERIENCE City of Fayetteville Fayetteville, Georgia ISE began working for the City of Fayetteville in 1987, and has served as the consulting engineer of record since in 1998. The City of Fayetteville is a premier community where we treasure our past and the promise of our future. We are a community where citizens and businesses grow and succeed together. Through the years, ISE has provided planning, engineering and management services for literally hundreds of projects. During ISE’s tenure, Fayetteville has nearly doubled in population which has spurred a significant demand for infrastructure improvements to meet the service needs of that growth. We have provided staffing and expertise for most any need related to Public Works, from consultation for citizen complaints all the way through a $12M project to double the capacity of the City’s wastewater treatment system. Proper planning and careful management of its resources has allowed the City to keep pace with the increasing demands for its transportation systems and water infrastructure, as well as increasing burdens on its natural resources. ISE has assisted Fayetteville with implementation of its comprehensive Stormwater Master Plan since the late 1990s as regulatory requirements for NPDES Phase II MS4 program took effect. In 2004, ISE assisted the City with implementation of the City’s Stormwater Utility, which, along with supplemental funding, has allowed the City to meet the demands being placed on its stormwater system. Program Implementation ISE has been a key asset to City staff in the development of their comprehensive program. Services included: • • • •
Stormwater Utility Implementation Revenue Bond Report Preparation Stormwater Ordinances EOS / LOS Policy Development
Engineering ISE has designed all of the City’s major drainage improvements since implementation of the City’s Stormwater Utility. Examples of the types of services provided included: • • • • • •
Hydrologic/Hydraulic Assessment Regulatory Permitting Coordination Construction Plan Preparation GA EPD Safe Dams Coordination Easement Coordination Alternatives Analysis
SELECTED PROJECT EXPERIENCE City of Fayetteville Continued Regulatory Compliance ISE has assisted the City with regulatory compliance since filing for coverage under NPDES MS4 Phase II Permit in 2003. Examples of our services have included: • • • • • • • • • •
NPDES Permit Preparation MS4 Inspection & Mapping Floodplain Mapping (MNGWPD) Dry Weather Screening TMDL Implementation Facilities Inspection Long Term WQ Monitoring MNGWPD Audit Assistance NPDES Annual Report Preparation Watershed Protection Plan
Geographic Information Systems (GIS) and Mapping Service ISE has assisted with the procurement of aerial photography as well as mapping of the City’s sanitary sewer system and storm sewer system. Specific Water Resources Projects • • • • • • • • • • • • • • • • • • • •
Bradford Square Drainage Magnolia Ridge Stormwater Utility Phase II LCI Grant Impervious Delineation Water Quality Ordinance Review City of Fayetteville Drainage Southside Master Plan Hydro Study NPDES Phase II NOI Stormwater Utility Phase II A Greenspace Fenwyck Detention Pond Survey & Easement Circle Drive Culvert Rehabilitation Project Pye Lake Consulting Perry Creek Water Sampling Wyngate Culvert Study Braemar Road Culvert Study Medford Manor Study Paces Drive Drainage Evaluation Heritage Lake Model Update CIP Design
City of Fayetteville Continued
SELECTED PROJECT EXPERIENCE • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
Comprehensive Plan Update NPDES Phase II NOI SW Permit Compliance 2005 NPDES Phase II SW Permit Compliance 2006 Detention Pond Inspection for NPDES Phase II Permit Redwine Road Drainage Basin Study MS4 Inspection & SW System Mapping District Watershed Monitoring Workplan SW Permit Compliance 2007 Stonewall Avenue Apartments Drainage Analysis Pye Lake Dredging SW Permit Compliance 2008 2009 LTM 2009 NPDES Phase II Pro Forma Bond Reissuance 2010 Chemical Water Quality Monitoring 2010 Biologic Monitoring Pye Lake Tributary Flood Study 2010 NPDES Phase II Compliance 2011 Chemical Water Quality Monitoring Pye Lake Survey & Jurisdictional Waters Determination Pye Lake Forebay Concept Design 2011 SW Permit Compliance Pye Lake Stream Restoration Construction Oversight 2012 WPP LTM WQ Monitoring 2012 Biologic Monitoring Heritage Lake Wedgewood Drainage Study Gingercake Creek Flood Study Paces Road Drainage Study Wyngate Subdivision Drainage Study Fenwyck Commons White Road Drainage Study Stormwater Quality Ordinance Stormwater Utility Presentation AsBuilt Pilot Station Sherwood Road Pye Lake Stream Restoration Construction Oversight 2012 Water Quality Monitoring 2012 Biologic Monitoring NEE Fayetteville WPCP Deep Forest Lane Drainage 2012 NPDES Compliance
SELECTED PROJECT EXPERIENCE Pye Lake Flood Control & Regional Detention City of Fayetteville, Georgia Pye Lake in Fayetteville, Georgia is a small lake built in the 1960s located in the western portion of the City which receives drainage from approximately 1,000 acres of downtown and central Fayetteville. The dam that forms Pye Lake has been classified as a high hazard dam (i.e. Category I) due to the amount of water potentially stored behind the dam and the presence of residential homes within the breach zone of the dam. In the summer of 2003, intense rainfall illustrated inadequacies in the design of the original outlet works, as downstream homes were flooded as a result of premature initiation of the emergency spillway. The City of Fayetteville became involved, not only at the request of the Dam owner to assist financially with the upgrade, but as having jurisdiction for overall public safety and stormwater management. The City determined that Pye Lake was a major component of the Cityâ€™s SWMP, specifically as a regional detention facility. ISE prepared hydrologic and hydraulic models of the Pye Lake watershed. These models were developed to support future capital improvement projects within the watershed as well as assist City officials with development of a stormwater management plan for the entire basin. Tasks in this effort included hydrologic and hydraulic analysis of the dam and downstream channel / floodplain, bathymetric surveys of the lake, and flood control alternatives to address the dam inadequacies as well as address downstream flooding. Following acceptance of a flood control alternative, ISE coordinated a team of professionals to design, permit and construct a rehabilitation plan for the dam in coordination with previously constructed downstream culvert improvements (Cornwallis Way culverts). As part of its Pre-Disaster Mitigation Program, officials of the Department of Homeland Securityâ€™s Federal Emergency Management Agency (FEMA) awarded the Georgia Emergency Management Agency (GEMA) a federal grant to assist the City of Fayetteville with the Pye Lake Flood Control Project. The Pre-Disaster Mitigation Program grant will assist with the implementation of comprehensive drainage master plan improvements for the western areas of the City of Fayetteville. The City of Fayetteville will receive $984,564 from FEMA for the funding of the Pye Lake Project. The City utilized Stormwater Utility Revenues to fund the required local match amount of $328,188.
Contact: Joe Morton City Manager 770.461.6029
SELECTED PROJECT EXPERIENCE SWMP Consulting & Stormwater Utility Set-Up / Implementation City of Fayetteville, Georgia ISE has served as the SWMP Consultant for the City of Fayetteville since 1998. ISE performed a wide diversity of services for the City over the last seven years including stormwater masterplanning; engineering design; supplemental funding procurement; Stormwater Utility development and implementation; development of SWMP ordinances; plan review; surveying; Comprehensive Plan development; and public education activities. Project activities included: • • • • • • • • • • •
Stormwater Utility Feasibility Study Development of a 5-Year Stormwater Masterplan Development of a SWMP Ordinance to address post construction runoff, and water quality best management practices Development of a Cost of Service Analysis and Rate Study Report Facilitator for a Stormwater Task Force with local stakeholders Preparation of the Stormwater Utility enabling ordinance Public Education Program to raise the awareness level for local stormwater issues and the implementation of the City’s Stormwater Utility Creation of the billing, collection and accounting systems Customer Service Training Program for Stormwater Utility Implementation of a drainage system inventory Citywide drainage masterplanning work and preparation of basin specific drainage analysis reports
ISE assisted the City with implementation of the Stormwater Utility by providing a wide diversity of professional engineering and consulting services listed above, which resulted in delivery of the first Stormwater Utility bill in February 2004. To date, the City’s utility collection revenues are exceeding projections and delinquent payments are less than 2%. Key Project Element A key aspect of the City’s Stormwater Utility involved a strategy whereby the Stormwater Utility was established under the existing City Water & Sewer Enterprise Fund, which enabled the City to consolidate expansion of the City’s WWTP and the Stormwater Utility capital program under a single Revenue Bond issuance in January 2004. The use of a revenue bond to fund both the WWTP expansion and the SWMP capital program offered several benefits to the City including: 1) acceleration of the capital drainage improvement project program and 2) validation of the Stormwater Utility rate structure by the Fayette County Superior Court thereby providing an extra layer of “protection” for the City’s Stormwater Utility against future legal challenges.
Contact: Joe Morton City Manager 770.461.6029
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plan Water and Sewer Department, City of Fayetteville, Georgia ISE completed a Watershed Assessment and Watershed Protection Plan for the City of Fayetteville in Fayette County, Georgia. ISE prepared and obtained EPD approval for the Water Quality Monitoring Workplan and the Watershed Assessment report. This assessment is a requirement of the City’s renewed NPDES Wastewater Discharge Permit as well as the City’s request to expand its treatment capacity. The Workplan was the first phase of a Watershed Assessment and defines the sample locations, constituent sampling list, and the scheduling parameters for the sample events. ISE staff developed the Workplan to address water quality issues already identified within the sanitary sewer service area and to gather additional pertinent water quality data that can help to define the extent and requirements of a future Watershed Protection Plan. In order to establish sampling locations, ISE first identified potential point sources including wastewater discharges, open and closed landfills, and industrial sites. ISE then chose sampling locations that would address these point sources and also provide information on the quality of water entering and leaving the City limits. This information not only provided the foundation for a sound Watershed Protection Plan, but also provided defensible data in the event that the City’s wastewater system is the subject of any outside water quality concerns. ISE then met with Ms. Elizabeth Booth at the EPD to discuss the preliminary monitoring plan to ensure that all of EPD’s concerns were addressed upfront. This ensured that comments were minimized and sped up the acceptance of the Work Plan, which allowed for ISE to begin sampling in time to meet EPD’s deadlines as assigned in the NPDES Wastewater Discharge Permit. It was ISE’s goal to develop a Work Plan that would be cost effective for the City to implement, but would also provide the data necessary to establish current watershed conditions and develop a targeted Watershed Protection Plan.
Contact: Don Easterbrook, PE Public Services Director 770.461.6029
SELECTED PROJECT EXPERIENCE Long-Term Water Quality Monitoring Program City of Fayetteville, Georgia ISE developed and implements the long-term water quality monitoring program for the City of Fayetteville (City) located in Fayette County, GA. ISE developed the monitoring program as part of the Fayetteville Watershed Protection Plan that the City was required to develop to meet the NPDES Permit conditions resulting from expansion of the Fayetteville Water Pollution Control Plant (WPCP). The purpose of the water quality monitoring program is to gauge the effectiveness of the Watershed Protection Plan and detect changing watershed conditions that may result from continued growth within the City and its sewer service area. Following EPD approval of the Watershed Protection Plan in 2008, the City contracted ISE to implement the annual water quality monitoring activities and submit annual reporting documents to EPD. ISE performs long-term water quality monitoring at four monitoring locations within rivers and streams draining the City as shown in the map below. ISE conducts water quality sampling during two wet weather events and two dry weather events performed quarterly at each site. Water samples are collected and analyzed for the following chemical and physical parameters during each sampling event: • • • • • • • •
Water and air temperature Dissolved oxygen pH Specific conductance Turbidity Total suspended solids (TSS) Chemical oxygen demand (COD) Nitrate-nitrogen (NO3)
• • • • • • •
Nitrite-nitrogen (NO2) Ammonia nitrogen (NH3) Total Kjeldahl nitrogen (TKN) Total phosphorus Orthophosphorus Hardness Heavy Metals including dissolved cadmium, copper, lead, and zinc
Additionally, ISE conducts bacteria sampling (including fecal coliform and E. coli) to calculate three geometric means (including four samples over thirty-day period) each year. ISE performs biologic monitoring at each site every other year. Biologic monitoring includes an assessment of available habitats, benthic macroinvertebrates, and fish which is performed in accordance with protocol established by the Georgia Department of Natural Resources. Following completion of all annual water quality sampling activities, ISE prepares an annual water quality report summarizing the water quality results for the year and assessing the effectiveness of the Watershed Protection Plan. As required by EPD, ISE submits the annual report to EPD along with a certification statement and EPD formatted spreadsheet containing the water quality results.
SELECTED PROJECT EXPERIENCE City of Peachtree City / Peachtree City Water & Sewerage Authority Peachtree City, Georgia The City of Peachtree City / Peachtree City Water and Sewerage Authority (WASA) have worked with ISE since 2001 on a variety of projects. Peachtree City is an award-winning master planned community located just south of Atlanta, Georgia. Founded in 1959, the city is home to a diverse population and provides the best in residential areas, commercial areas and community services to its citizens. As the City continues to grow and prosper, ISE will continue to work alongside the City as the consulting engineer providing comprehensive engineering services for infrastructure projects over the duration of this relationship. Following is an overview of services provided. Peachtree City WASA and ISE have been involved in various environmental projects related to sewer utility services for many years. WASA owns and operates the entire sewer system for the City. They System consists of 35 pump stations, 14.5 miles of force main, 171 miles of gravity sewer, and two wastewater treatment facilities capable of treating 6 MGD. ISE has served as the City’s stormwater management consulting engineer of record since 2001. In that time, ISE has provided numerous services to the City including planning, engineering, construction management, watershed modeling, drainage system evaluation and design, infrastructure inventory, stormwater utility development, NPDES MS4 permit compliance assistance, citywide water quality monitoring, floodplain analysis / FEMA permitting assistance, MNGWPD compliance, detention pond design as well as project management through subcontracting biological assessments and stream restoration. The following project descriptions provide a sampling of the types of services that we have provided in the last few years. NPDES Annual Water Quality Monitoring Program As part of the City’s annual NPDES Phase II permit requirements, Peachtree City conducts an annual water quality evaluation of the streams in the City. ISE has coordinated this effort since its inception in 2001. Each year, ISE conducts water quality sampling at six permanent sites to evaluate long-term trends in water quality. Each site is sampled twice during wet weather flows and twice during dry weather for various chemical constituents. Each site is also sampled for fecal coliform four times in the summer and four times in the winter to establish geometric means and comparison against EPD’s standards for fecal coliform bacteria. In addition to the chemical parameters, ISE also subcontracts a biologist to evaluate three of sites each year to determine the health of the macro-invertebrate communities and asses the habitat conditions. Finally, ISE also conducts in-situ monitoring of approximately 18 sites every two weeks to establish trends for in-stream temperature, pH, dissolved oxygen, conductivity, and turbidity. Following completion of the field work, ISE prepares an annual report summarizing the data as well as evaluating trends utilizing data from previous years. As part of this project, ISE provides all labor and materials for the project as well as covering all laboratory fees. It is anticipated that the dissolved oxygen data will be useful in the future as the City considers a de-listing effort given that Flat Creek is currently listed on the EPD’s 303(d) list. Geographic Information Systems (GIS) and Mapping Service Since 2001 to the present, ISE is assisting City staff with addition and maintenance of the various components of the City’s GIS including but not limited to data related to the city limits, zoning information, future land use, traffic control devices (signs), historic building data base, and tree inventory. We have also conducted training seminars for City staff on how to maintain these databases.
Cherry Branch Hydrologic & Hydraulic Master Plan City of Peachtree City, Georgia
SELECTED PROJECT EXPERIENCE The Cherry Branch Drainage Basin contains a significant number of drainage complaints that the City has documented as part of their drainage complaint tracking program. These complaints vary significantly and include structural flooding of homes, severe channel erosion, nuisance flooding and drainage system operation issues. ISE assisted the City of Peachtree City in the development of a drainage system model that will serve as the technical basis for addressing many of the problems within the watershed as well as establish a future conditions floodplain map to address MNGWPD regulatory requirements. As part of this effort, ISE developed a hydrologic model for the Cherry Branch Basin that simulates the hydrologic response of the watershed under the existing conditions. The SCS methodology was used to predict stormwater runoff rates and volumes for the 100-, 50-, 25-, 10-, 5-, 2-, and 1-year storm events. Modeling was performed utilizing HEC-HMS software. A HEC-RAS hydraulic model for the Cherry Branch watershed was then developed to simulate the existing hydraulic conditions of the studied streams. Utilizing a cost effective mix of field run and high accuracy LiDAR survey data, a digital floodplain was created in ArcGIS software to represent the model results. Following completion of the modeling effort, an assessment of the existing conditions of the watershed was prepared. The assessment included evaluation of modeled detention ponds, road culvert levels of service and channel inspections to determine hydraulic capacity and scour. This in turn allowed the City to identify at-risk structures as well as focus future capital improvements. Finally, by including a future conditions component to the modeling, the City has been able to maintain compliance with the MNGWPDâ€™s requirements for communities to map the future conditions floodplains in their jurisdiction.
Contact: Dave Borkowski, PE City Engineer 770.631.2538
SELECTED PROJECT EXPERIENCE SWMP Development & Stormwater Utility Set-Up City of Peachtree City, Georgia ISE and the City have worked on implementing the City’s Stormwater Program Assessment & Action Plan document since July 2002. ISE was contracted by Peachtree City to prepare a Stormwater Utility Feasibility Study in July 2003 and the final report was delivered in March 2004. After reviewing the findings and recommendations of the Stormwater Utility Feasibility Study report, the City decided to move forward with Stormwater Utility implementation in September 2004 with an initial billing date of October 2005 to coincide with the City’s fiscal year start date. That schedule was revised to February 2006 because of numerous SWMP issues that arose. For example, the capital list grew substantially as a result of two major storm events in early and mid-2005, and the City Council wanted to hold additional public education meetings with community stakeholders and future customers. Furthermore, the City’s NPDES Phase II GaNOI is continually ramping up with requirements and the City feels that the Stormwater Utility will assist in meeting the various regulatory compliance issues. Three public meetings were conducted in October 2005 to further educate citizens on the City’s SWMP and Stormwater Utility, and the City issued the first Stormwater Utility bills in April 2006.
Contact: Dave Borkowski, PE City Engineer 770.631.2538
SELECTED PROJECT EXPERIENCE Willowbend Road Culvert Replacement Project Peachtree City, Georgia The Willowbend Road Culvert Replacement Project consisted of replacing an existing metal arch culvert under Willowbend Road adjacent to City Hall in Peachtree City, Georgia. Although the culvert had not yet reached the end of its useful service life a number of factors necessitated the City moving forward with the replacement of the culvert. Chief among these factors was upstream flooding of an adjacent church as well as safety issues associated with water passing over the roadway during large storm events. Following discussions with the Willowbend Road Culvert Prior to Construction City, a design solution was identified by utilizing previously developed hydrologic and hydraulic modeling (from the City’s floodplain mapping efforts) that would provide a 100-year level of service to the road and substantially reduce the occurrences of upstream flooding. Utilization of a 19-foot wide by 7-foot – 4-inch high live bottom aluminum arch culvert was deemed the best solution. This design allowed for a large hydraulic capacity to pass stormwater runoff while also limiting the chances for clogging from debris over a multi-barrel box culvert concept also considered by the City.
Willowbend Road Culvert Prior to Construction
Willowbend Road Culvert After Construction
ISE’s role in the project included hydraulic modeling, surveying, development of construction plans and specifications as well as environmental permitting. Following completion of construction plans and environmental permitting, the City also contracted ISE to assist in oversight of the construction of the project. All work for the design and construction of the culvert was completed within approximately 12 months which included design, permitting, public bidding of the construction contract and completion of construction activities.
SELECTED PROJECT EXPERIENCE Flat Creek Bridge Approaches for Multi-Use Path City of Peachtree City, Georgia One of Peachtree City’s hallmarks is its 90-mile network of multiuse paths for pedestrians, cyclists, and golf carts. Peachtree City residents can go from neighborhood to shopping centers, schools, and parks through the wooded scenery that makes Peachtree City special. Dividing the City in half, Flat Creek runs from the City’s northern border to its confluence with Line Creek in the southern portion of the City. Part of the City’s overall path masterplan is to provide access from the residential areas east of Flat Creek to the industrial park (employment areas) and the City’s Baseball & Soccer Complex (BSC) on the western side of Flat Creek. In 2005, the City received a grant to construct a steel and concrete bridge over Flat Creek at the site of an older bridge crossing that had been destroyed by a tropical storm in the mid 1990s. However, the grant did not include funding for the approaches to this bridge. As such, the City contracted ISE in 2006 to develop plans for new approaches to the bridge. Numerous design concepts were considered including steel and concrete approach bridges that would angle down to the floodplain, reinforced earthen approaches as well as elevated dikes with drainage arch culverts to equalize floodwaters. The final concept chosen was unique in that the City decided to move forward with wooden bridges connecting to the existing steel and concrete bridge that spanned nearly the entire width of the floodplain. Prior to this project, the City did not allow wooden cart path bridges in the City and elected to make this project a special test case for construction of such a structure in Peachtree City. An added benefit of this approach was the fact that it would bypass all of the sensitive wetlands limiting human contact with this pristine eco-system running through the heart of the City. Services provided by ISE as part of this project included: • • •
Surveying Hydrologic & Hydraulic Modeling Development of Civil Construction Plans & Specifications
Submittal of a Conditional Letter of Map Revision (CLOMR) Management of Geotechnical, Structural, & Environmental Subconsultants
In the spring of 2010 after rehabilitating the cart paths leading up to the bridge system, the City opened the new bridge to the public. Currently awaiting funding and completion of a GDOT widening of SR 74, the City hopes to complete the final portion of the path system to the BSC in the near future thereby dramatically lowering the need for residents to utilize automobiles for travel to one of the City’s premier recreation facilities.
SELECTED PROJECT EXPERIENCE Wisdom Road Stream Bank Stabilization Peachtree City, Georgia During the unexpectedly heavy rains in the winter and early spring of 2010, a local stream bank along Wisdom Road in northern Peachtree City began to experience severe stream bank erosion. Unlike many communities, the City of Peachtree City (City) has protected much of their streams by creating large green belts along many of principal streams on the City. However, in the case of this stream, a busy local road (Wisdom Road) leading to one of the elementary schools in the City ran immediately parallel to the stream. Additionally, one of the City’s golf cart paths also ran between the roadway and the stream bank. Peachtree City’s public golf cart path system is known throughout the nation and consists of 90 miles of paths allowing access to virtually every location in the City via the use of golf carts and low speed electric vehicles. This particular golf cart path allows parents to drive their children to school without the use of automobiles and the corresponding traffic. As such, this road and cart path was considered a critical transportation corridor for the area. When the erosion began, the cart path began to collapse into the stream and ultimately, the roadway was also threatened thereby creating a significant safety hazard. Additionally, it was estimated that approximately 7 ½ tons of sediment was being lost into the creek for every inch of migration that the stream bank eroded back into the slope. The City contracted ISE to develop a mitigation plan to arrest the erosion of the bank and at the same time, address the safety concerns with the vehicular and pedestrian traffic on the cart path / roadway. Additionally, the City desired to rehabilitate two small pipe systems that discharged into the creek in the vicinity of the erosion issues. A critical constraint in the design process was the fact that in order to facilitate construction, Wisdom Road needed to be shut down. This action would result in the closing of an entrance to the aforementioned elementary school and closing the primary access route to the school from the nearest highway. As such, it was necessary to ensure that the construction could take place during Spring Break. Given that the project had to be publically bid to comply with purchasing standards in the City, it was necessary to complete the design plans within approximately 2 weeks of identification of the project. ISE utilized previously developed hydrologic and hydraulic models of the stream along with new hydraulics for the pipe systems that needed to be replaced. The plans developed for the project included site plans, wall profiles, erosion and sediment control plans as well as traffic management and utility management plans. In order to ensure no further bank erosion, the plans called for construction of a palisades wall. All construction was completed along with final stabilization of the project within approximately 125 days of initial project investigation by ISE and City stormwater personnel.
SELECTED PROJECT EXPERIENCE Lakeside Drive Drainage System Project Peachtree City, Georgia The Lakeside Drive Drainage System Project is located central Peachtree City off of Peachtree Parkway. Two residential homes built in the late 1970’s was experiencing flooding during moderate to heavy storm events. Based on the best available information, it was presumed that the existing drainage system was inadequate to accommodate the storm events. As a result, the City of Peachtree City (City) commissioned ISE to develop plans to construct a new drainage system capable of conveying the 100-year design storm and prevent flooding of the homes. Initially, ISE prepared a concept plan for the City which was utilized in meetings with the property owners. This was considered crucial given the fact that the new system would need to be routed relatively close to one of the homes and that there would be significant disturbances to the adjacent properties. Following approval of the concept plan, ISE developed full construction plans for the project. Additionally, ISE coordinated environmental permitting issues by ensuring that the United States Army Corps of Engineers was aware of the project. Following completion of the design, the City contracted ISE to oversee the construction of the project. Efforts by ISE included: • • • • • • • • •
Pre-Bid Meeting Attendance and Coordination Bid Review and Award Recommendation Pre-Construction Conference Project Administration Review Contractor Shop Drawings and Submittals Field Oversight of Construction Activities (Daily Inspections) Review and Process Contractor Pay Requests Review and Process Change Orders Final Punch List Inspection
Contact: Mark Caspar 770.487.5183
SELECTED PROJECT EXPERIENCE Comprehensive Water Quality & Biological Monitoring Program City of Peachtree City, Georgia ISE developed and continues to implement the water quality monitoring program for Peachtree City, GA which includes sampling points at 34 locations throughout the City. The longterm, citywide monitoring program was established as a result of recommendations made in the Stormwater Program Assessment and Action Plan completed by ISE in July of 2002. As part of the Action Plan development, the following tasks were initiated: • • • • • •
Compile and review existing data Implement sampling and testing program to establish citywide baseline Integrate existing historical data with new citywide baseline data Identify water quality issues within the City Provide recommendations to address identified concerns Develop long-term monitoring program
The monitoring program established 12 annual sample points and 22 bi-annual sample points. The total of 34 monitoring locations correspond to the same locations as those sampling points established in the baseline sampling program of 2001, conducted by ISE; the results of which were summarized in the referenced Action Plan. The 12 annual locations are sampled for water quality and biological parameters each year, while the 22 bi-annual locations are alternated (11 one year and 11 the next year). In each year, a total of 23 locations are sampled for biological and habitat assessment. Sampling is conducted for six in-situ testing parameters and 19 laboratory parameters. The biological sampling consists of an EPT index for comparison with previous EPT indices. The protocol follows that specified by the Georgia DNR Wildlife Resources Division, Fisheries Management Section. The annual/biannual monitoring data is integrated with the baseline database developed as part of the Stormwater Program Assessment and Action Plan. The monitoring data is incorporated in a GIS format for comparison of results over time. The results confirm the success of existing BMPs or require amended recommendations to meet new, mitigated, or lessened water quality problems. An additional program was initiated in 2005 to attempt to reassess water quality impairments on Flat Creek, a 303(d) listed stream. Flat Creek is listed on the 303(d) list as partially supporting a designated fishing use due to low dissolved oxygen levels. The monitoring program requires 20 dissolved oxygen measurements to be taken at each of four locations on Flat Creek, in accordance with Georgia EPD requirements. To ensure compliance with EPD requirements, a Sampling and Quality Assurance Plan was developed and approved by EPD to outline the specific procedures to ensure submitted data was useful for 303(d) list reassessment.
Contact: Mark Caspar 770.487.5183
SELECTED PROJECT EXPERIENCE City of Fairburn Fairburn, Georgia The City of Fairburn awarded a Master Services Agreement in 2003 to ISE to provide planning, engineering and management services on a variety of projects for the City. Fairburn is a city of historic homes and buildings, and strives to “embrace the future while remembering the past”. The downtown Commercial District is listed in the National Register of Historic Places and includes 20 different commercial buildings and two train depots dating from the late 19th and early 20th centuries. Fairburn has experienced phenomenal growth due both to its proximity to Atlanta’s Hartsfield Jackson Airport and because of annexation. ISE has provided comprehensive services to the City, from assisting with preparation the Comprehensive Plan, securing CBDG and 319 Grants, to engineering for infrastructure projects. Fairburn is a NPDES Phase I community. Under the Phase I requirements, ISE began assisting Fairburn with development and implementation of a comprehensive Stormwater Management Plan beginning in 2003. In 2004, ISE assisted the City with development and implementation of the City’s Stormwater Utility, which, along with supplemental funding such as 319 Grants, has allowed the City to meet the demands being placed on its stormwater system. Program Implementation ISE has served as the City’s Program consultant since implementation of the City’s Stormwater Utility. • • •
Stormwater Utility Implementation EOS / LOS Policy Development Stormwater Ordinance Development
Engineering Following implementation of the City’s Stormwater Utility, a number of drainage systems were improved to address long running drainage complaints in the City. ISE served as the engineer of record for these projects. Our services included: • • • • •
Hydrologic/Hydraulic Assessment Regulatory Permitting Coordination Construction Plan Preparation Alternatives Analysis Easement Coordination
SELECTED PROJECT EXPERIENCE City of Fairburn Continued Regulatory Compliance ISE has served as the City’s regulatory compliance consultant since 2003 and has included the following services: • • • • • • • • • •
NPDES SWMP Preparation MS4 Inspection & Mapping Floodplain Mapping (MNGWPD) Dry Weather Screening TMDL Implementation Facilities Inspection Surface Water Sampling/Analysis MNGWPD Audit Assistance NPDES Annual Report Preparation NPDES Industrial Stormwater NOI / SWP3 Preparation
Geographic Information Systems (GIS) and Mapping Service Since 2005 ISE has assisted City staff with maintenance of the various components of the City’s GIS including but not limited to data related to the city limits, parcels, roads, utilities, etc., including data development for the City’s E911 system. We have also conducted training seminars for local surveyors, engineers and developers in implementation of the City’s new as-built specifications.
SELECTED PROJECT EXPERIENCE Citywide Stormwater Program Development City of Perry, Georgia ISE was contracted by the City of Perry to develop a Stormwater Program Strategy for the community. Following is a summary of the work tasks and elements that have been performed for the City. Stormwater Program Evaluation and Assessment ISE evaluated the organizational structure of the City relative to the operation of the stormwater program. The assessment also evaluated the various issues (i.e. flooding, water quality, maintenance, funding, CIP, political & public perception of the program, etc.) that the City was dealing with regard to their stormwater program. The final part of the assessment dealt with evaluation of current regulatory issues/requirements facing the City, as well as future regulatory issues/requirements. Drainage Complaint Assessment ISE implemented the following tasks: • • • • • •
Interviews with City staff and residents to evaluate problems Perform field reconnaissance work Categorize drainage problems by type and priority Organize the existing complaints by basin and sub-basin and place into the City’s GIS database Create a drainage complaint questionnaire for use by City staff Develop a drainage masterplanning strategy for the City
The findings of our work determined that a majority of the complaints were located within the Perry Branch Basin. The other significant finding was that the lower (or downstream) portion of the basin was much more developed than the upper portion, which posed some concerns with regard to future development in the upper basin areas. As such, ISE recommended that the City consider developing a drainage masterplan for that particular basin. Review of the City’s Drainage Infrastructure System ISE performed a cursory review of the existing manmade and natural drainage system in an effort to quantify the number of structures within the system. The work effort consisted of the following: • • • • • •
Delineate basins and sub-basins Develop basin specific drainage maps for the City Evaluate development trends and land use patterns Characterize the drainage infrastructure condition Develop a preliminary inventory map of the system Estimate the cost to conduct a GPS inventory of the entire system
SELECTED PROJECT EXPERIENCE Citywide Stormwater Program Development Continued Stormwater Program Funding Analysis This task involved an evaluation of several potential funding mechanisms that might partially or wholly fund the future SWMP. ISE evaluated the various methods that would likely be feasible to fund the City’s future program. Final Report The Final Report is a summary of the information compiled during this study. The report text outlined action items and policy issues for the City to utilize when formulating a future Stormwater Program Strategy. The Final Report established principles and policies to guide the future stormwater program including: 1) operation of the stormwater program more like a public works “utility” similar to water and sewer; 2) maximizing floodplain usage throughout the City; 3) addressing citywide water quality issues; and 4) achieving incidental compliance with applicable regulatory requirements through effective stormwater program implementation. ISE provided a Final Report that serves as a “road map” for the future stormwater program implementation by the City. The document dated August 2002 includes recommendations for “potential future regional detention pond sites” throughout the City. The initial recommendations identified four potential sites that could serve as regional detention ponds to address both water quantity control and water quality treatment. The Final Report also addresses both schedule and funding issues related to cost effective implementation of a future Stormwater Management Plan. Stormwater Funding Feasibility Study (February 2004) The City contracted with ISE to conduct a comprehensive Funding Feasibility Study related to the implementation elements in the City’s Stormwater Managements Plan. The Funding Feasibility Study was undertaken in part to identify the most stable and equitable mechanism to fund capital projects including regional detention pond construction. Stormwater Management Ordinance & Local Design Manual Development ISE recently worked with the City of Warner Robins, the City of Perry, the City of Centerville and Houston County to formulate a strategy whereby the four communities will collaborate in the development of a model stormwater management ordinance and local stormwater design manual. The intent of this exercise was to address NPDES Phase II Stormwater Permit requirements for the local governments, as well as establish a minimum standard for stormwater management regulation within the County and the three cities. The final ordinance addresses applicable requirements of the NPDES Phase II Stormwater Permit and specifies where inter-jurisdictional coordination will be implemented to address issues on a watershed basis. The ordinance was adopted in 2005.
Contact: Lee Gilmour City Manager 478.988.2703
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plan Water & Sewer Department, City of Perry, Georgia In 2006 ISE obtained final approval for the Watershed Assessment and Watershed Protection Plan for the City of Perry, GA. The City of Perry is located south of Macon, GA within the Coastal Plain physiographic province. The Water Quality Monitoring Workplan was submitted and approved in the spring of 2004. As part of the Watershed Assessment, six separate sampling events were conducted at 11 sample sites. Five of the events were dry weather sampling events, while the other was a single wet-weather sampling event. The single wetweather sampling effort consisted of four separate water quality samples for each sample site taken over the time frame of the stormwater hydrograph. Field sample logistics required three rainfall events to complete the wet-weather sampling regime for each site. A biological assessment was also conducted at each sample location. The Cityâ€™s Watershed Protection Plan was coordinated with the countywide stormwater effort related to the NPDES Phase II Stormwater Permit. While the City is not currently permitted under a NPDES Phase II Stormwater Permit, Houston County and the other municipalities adjacent to Perry are permitted and working cooperatively on stormwater management program implementation. The countywide stormwater management program elements include a post construction runoff management ordinance, good housekeeping program, illicit discharge and detection, and drainage system inspections and maintenance, all of which are requirements of the Cityâ€™s NPDES Wastewater Discharge Permit.
Contact: Lee Gilmour City Manager 478.988.2703
SELECTED PROJECT EXPERIENCE Cherokee Future Conditions Floodplain Mapping Cherokee County, Georgia ISE has developed Future Conditions Floodplains to assist Cherokee County with compliance with the new requirements set forth by the MNGWPD, specifically the Model Floodplain Management/Flood Damage Prevention Ordinance dated February 2, 2006. The requirements that are unique to the MNGWPD Model Ordinance are as follows: • • •
Establishment of a “Regulatory Flood” based on future condition hydrology data as determined by the County’s future land use plan (this term differs from existing FEMA term related to the “regulatory flood”) Applying the flood hazard determinations to streams with a drainage area of 100 acres or more. Establishment of elevations for the regulation of residential and non-residential structures in and adjacent to the flood hazard areas.
This study included 585 miles of streams in the County that have a drainage area in excess of 100 acres with the exception of streams that have traditionally been subject to floodplain regulation (i.e. Etowah River, Little River) and those streams within the corporate boundaries of the Cities of Canton, Woodstock and Holly Springs. ISE identified and delineated the major watershed basins within the County that fall under the provisions of the MNGWPD Model Ordinance. The future condition flows were calculated by estimating the impervious surface coverage for the future land use conditions based on the future land use maps from Cherokee County and the surrounding counties. USGS regression equations were then used to estimate the future conditions 100-year discharge. The hydraulic analysis is dependent on the input of physical parameters to simulate flow conditions in the floodplain. ArcGIS and HEC-GeoRas were used extensively to process the physical data in a GIS based environment using Cherokee County LiDAR topography. Approximately 12,900 hydraulic cross sections were incorporated into the models to obtain a realistic representation of the streams. The hydraulic analysis of the streams was done using the HEC-RAS software created by the U.S. Army Corps of Engineers. HEC-RAS is a onedimensional hydraulic analysis system that contains components for steady flow water surface profile computations. The steady flow component of HEC-RAS is capable of modeling sub-critical, super-critical and mixed flow regime water surface profiles within a dendritic stream system or a single river reach. For this analysis, the water surface profiles were completed using the sub-critical flow regime computations. Water surface profiles generated by the HEC-RAS models were imported into ArcGIS. The HEC-GeoRAS utility was used to create the initial delineation of the future condition floodplains. The floodplains were checked for inaccuracies caused by differences in the spatial projections and interpolations between the ArcGIS and HEC-RAS software. Edits were made to obtain the final floodplain delineation by comparing the floodplain polygons to the LiDAR topography.
Contact: Geoff Morton Director of Engineering 678.493.6077
SELECTED PROJECT EXPERIENCE Cherokee Future Conditions Floodplain Mapping Continued River & Reach Naming Conventions Each stream segment in the hydraulic model was identified by a unique combination of a river name and reach name. The stream name was used for the river name of the main stem of the stream network whenever possible. If the stream is not a named stream, then the sub-basin designator was used for the stream name. The tributaries are numbers that reflect the position of the tributary from the downstream confluence of the main stem. Therefore, Tributary 2 (or Trib 2) would be the second tributary of a stream network. Although this system is contrary to the traditional Strahler Stream Order system, it is somewhat easier for the layman to understand. As such, this system will help the County in explaining the future conditions floodplain results in the future.
SELECTED PROJECT EXPERIENCE SWMP Development & Stormwater Utility Formation City of Roswell, Georgia In 2004, ISE was initially contracted by the City of Roswell to perform a SWMP Assessment and prepare an Action Plan. The Stormwater Program Assessment was initiated in 2004 to: 1) better define the current stormwater program issues facing the community; 2) obtain feedback from key stakeholders in the community regarding future SWMP priorities and implementation; and 3) formulate a strategy to address the pertinent SWMP issues. Working closely with the City staff and community stakeholders, ISE identified the City’s needs related to stormwater management and outlined recommendations for SWMP implementation. The final document summarized ISE’s findings, presented the feedback generated through the public involvement process, outlined the proposed recommendations, and presented an Action Plan for future SWMP implementation for consideration by City staff and the Elected Officials. Stormwater Utility Feasibility Study In July 2006, ISE along with project team member CH2MHill initiated work on a Stormwater Utility Feasibility Study to determine the feasibility of implementing a Stormwater Utility to fund the program priorities outlined in the SWMP Action Plan published in September 2005. The report included the following information: • • • • • • • • •
Review of the future SWMP priorities and costs Assessment of future SWMP cost implications Review of available SWMP funding sources Overview of the Stormwater Utility concept Legal considerations of setting up a Stormwater Utility in Georgia Structural characteristics of a Stormwater Utility Assessment of the City’s existing billing and customer service systems Consideration of the various Stormwater Utility rate methodologies Stormwater Utility Implementation Plan and Schedule
Stormwater Utility Implementation Based on the findings of the study and presentations to the City Council by the project team of ISE and CH2MHill, the City contracted the project team in January 2007 to set up the Stormwater Utility. The Project Team has been progressing with the project for the last 19 months and we are now moving into the final step of the process that will result in Stormwater Utility bills being issued in summer of 2009. The City is planning to issue the Stormwater Utility user fee charge as a separate line item on the monthly public utilities bill. Public meetings were conducted to educate both the elected officials and the general public on SWMP issues as well as Stormwater Utility development and implementation.
Contact: Alice Champagne, CFM Water Resources Manager 770.641.3715
SELECTED PROJECT EXPERIENCE NPDES Phase II Compliance / Stormwater Consulting City of Centerville, Georgia City of Dalton, Georgia City of Tunnel Hill, Georgia City of Varnell, Georgia Whitfield County, Georgia In July 2002, Whitfield County and the City of Dalton initiated the process of developing a comprehensive regulatory compliance strategy as well as implementation of a more comprehensive SWMP. The County undertook this effort in response to various issues including flooding and infrastructure concerns and the impending regulatory compliance requirements (i.e. NPDES Phase II, TMDLs, etc.). The County along with the Cities contracted ISE to provide services associated with the preparation of a stormwater management strategy that focused on addressing these regulatory requirements. Following assessment of the existing SWMPs, ISE prepared the Notice of Intent (NOI) for coverage under Georgiaâ€™s NPDES Phase II General Stormwater Permit. In addition to providing for the initial NPDES Phase II compliance elements, ISE has also assisted the County and Cities with compliance under the NPDES Industrial permit for those government owned sites that met the requirements of the program after the ISTEA exemption ended in 2003. In the intervening years since the initial NOIs were filed, ISE has continued to provide support to the communities with individual activities under the NOI as well as annual reporting when necessary. In 2006, ISE was contracted to develop a new Stormwater Ordinance for the County and the Cities that would address Phase II post construction requirements. A unified ordinance was developed and adopted by all communities that addressed these requirements and ensured that each community was consistent with the others. Although, the bulk of ISEâ€™s efforts have been focused on assisting the communities with remaining in compliance with the various stormwater regulations, ISE has also conducted numerous drainage studies to evaluate drainage infrastructure concerns as well as flooding issues. Examples of these projects include evaluations along Dug Gap Road, Maple Grove Road, Florence Avenue and McLellan Creek.
SELECTED PROJECT EXPERIENCE NPDES Phase II MS4 Permit Compliance / Stormwater Consulting City of Centerville, Georgia
Example of Centerville – Drainage System Mapping
ISE has served as the City of Centerville’s (City) stormwater consultant since implementation of the City’s National Pollutant Discharge Elimination System (NPDES) Phase II Municipal Separate Storm Sewer System (MS4) permit in 2003. Each year, ISE has worked with City staff to develop and implement a comprehensive city wide compliance strategy to address the regulatory requirements facing the City that year. This strategy has typically resulted in a blending of ISE and City staff resources such that a cost effective solution was implemented utilizing Centerville staff for most tasks with ISE assisting on more technical and resource intensive tasks. Examples of ISE’s efforts have included drainage system inventory / mapping and assessment, dry weather screening, and NPDES Phase II annual report development / EPD coordination. In 2004, Centerville in partnership with the City of Warner Robins, City of Perry, and Houston County contracted ISE to assist in the development of a model drainage ordinance that would meet the requirements of the NPDES Phase II permit and also help guide future development in the area. As a result of this effort, Houston County and the cities now have a common development standard for drainage systems regardless of jurisdiction. In 2012, Centerville hired ISE to assist with the development and implementation of a Stormwater Utility.
Contact: Mike Brumfield Utilities Superintendent 478.953.3222
SELECTED PROJECT EXPERIENCE Rockdale County MS4 Urbanized Area Outfall Inventory & Condition Assessment Rockdale County, Georgia ISE was contracted by Rockdale County to collect a “map grade” inventory of the stormwater outfalls within the urbanized area of the County for NPDES Phase II NOI compliance purposes. In addition, ISE was contracted to perform a comprehensive MS4 inventory of the public drainage system through a “pilot study.” One of the key issues that the County was required to address as part of its NPDES Phase II Permit and compliance efforts was inventory and condition assessment of the County’s drainage system outfalls. The NPDES Phase II Permit required that the County map 100% of the system outfalls by the end of 2006. ISE performed the GPS inventory and condition assessment on all outfalls within the County’s urbanized area. Additionally, ISE also began MS4 inspection and mapping of a small area of the County surrounding the north and south sides of the City of Conyers. Results of this mapping are summarized in the table below: Initial Mapping Initiatives Storm System Structure Stormwater Outfalls (Outfall Inventory)
Structures Mapped 1
End of Pipe
Flared End Section
Other Stormwater Structures
Covers entire urbanized portion of County other than Conyers
Data collection efforts for this project consisted of field personnel recording data for each outfall on a handheld computer, which includes a handheld GPS with WAAS correction (Thales Mobile Mapper, sub-meter accuracy). The attribute data, which is recorded directly into the GIS file, included the following information at each outfall, as appropriate: ID, structure type, pipe size, headwall wing angle, headwall measure down, end of pipe projecting status, end of pipe measure down, flared end section material, flared end section measure down, condition, sheen, clarity, inventory date, sediment, odor, and water.
Contact: Todd Crosby Stormwater Engineer 770.278.7100
SELECTED PROJECT EXPERIENCE Rockdale County MS4 Inventory & Condition Assessment Rockdale County, Georgia In 2007, ISE was again contracted to expand on the pilot inventory study and conduct a complete inventory and condition assessment of the Rockdale County drainage system over a multi-year period (20% of the MS4 per year). This effort consists of mapping the entire MS4 drainage system within the urbanized and non-urbanized areas of Rockdale County and conducting a condition assessment on each structure to achieve NPDES Phase II and MNGWPD compliance.
Contact: Todd Crosby Stormwater Engineer 770.278.7100
Initial Mapping Initiatives 2007 2008 Urbanized Area Non-Urbanized Area Urbanized Area Non-Urbanized Area 791 112 1580 352 29 4 128 7 2088 975 1768 580 380 241 347 220 585 138 689 274 20 3 19 4 115 19 251 51 47 15 78 14 162 97 355 100 54 19 190 20
Storm System Structure Catch Basin Drop Inlet End of Pipe Flared End Section Headwall Hooded Grate Inlet Junction Box Outlet Structure Pipe Direction Yard Inlet Total
Contact: Todd Crosby Stormwater Engineer 770.278.7100
SELECTED PROJECT EXPERIENCE Watershed Protection & Water Quality Work Plan Rockdale County, Georgia In February 2007 Rockdale County Water Resources staff contacted ISE about their concerns regarding the Countyâ€™s excessive annual monitoring costs of approximately $400,000 for implementation of long-term monitoring activities required by the countywide Watershed Protection Plan developed by the County in 2002. The County also desired to revise the annual water quality monitoring to meet the requirements of the Watershed Management Plan developed by the Metropolitan North Georgia Water Planning District (District). ISE was able to work with the County staff and Georgia EPD staff to develop a monitoring program that fully addressed all applicable requirements in a more cost effective and stream-lined manner. After a series of meetings with EPD and the County, ISE was able to secure final approval on a new countywide Watershed Protection and Water Quality Work Plan in August 2007 which reduced the annual monitoring cost from approximately $400,000 per year to approximately $175,000 per year. The Work Plan included monitoring locations throughout the County with specific objectives and water quality parameters for long-term monitoring, biologic monitoring, bacteria monitoring, hydrologic monitoring, nutrient monitoring, and drinking water monitoring. ISEâ€™s knowledge of the monitoring requirements and our ability to successfully work with the Georgia EPD staff resulted in a significant cost savings to Rockdale County. Since EPD approval of the Workplan, Rockdale County has contracted CCR Environmental to implement the annual water quality monitoring activities outlined in the Workplan. CCR has partnered with ISE each year to prepare annual reporting documents including the annual progress report summarizing the water quality results which is submitted to EPD.
Contact: Lee Pope 770.278.7473
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plans St. Simons WPCP Watershed Protection Plan Exit 29 WPCP Watershed Assesment and Protection Plan Glynn County, Georgia In 2005 ISE was contracted by Glynn County to prepare a Watershed Protection Plan for St. Simons Island for the NPDES permitting requirements due to the planned expansion of the St. Simons WPCP. Although the Watershed Assessment had been completed by another consultant, the County contracted ISE to prepare the Watershed Protection Plan due to ISE’s significant experience in water resources planning. Also in 2005 Glynn County contracted ISE to conduct a Watershed Assessment and develop a Watershed Protection Plan for the expansion of the County’s Exit 29 WPCP in Brunswick, GA. Since ISE was contracted to prepare two Watershed Protection Plans within the County, ISE worked with EPD to develop a countywide Watershed Protection Plan with elements specific to each sewer service area in separate appendices so they could be added to the countywide plan when approved by EPD. The countywide plan included: • • • •
Explanation of political boundaries TMDLs and TMDL Implementation Plans within the County Countywide BMPs including: Stormwater Management Program, Water Resources Ordinance, and Local Stormwater Design Manual Annual reporting requirements
As an appendix to the countywide Watershed Protection Plan, ISE included plan elements specific to the sewer service area of the St. Simons WPCP including: summary of the St. Simons Watershed Assessment, and Longterm water quality monitoring plan. The Glynn County and St. Simons Watershed Protection Plan was approved by EPD in May 2006. ISE completed and obtained EPD approval of the Exit 29 WPCP Watershed Assessment in July 2007 and Watershed Protection Plan in February 2008 (which was also added as an appendix to the countywide Watershed Protection Plan). Since obtaining approval of the St. Simons WPCP Watershed Protection Plan and Exit 29 WPCP Watershed Protection Plan, the Brunswick-Glynn Joint Water & Sewer Commission (JWSC) has contracted ISE each year to implement long-term water quality monitoring within both sewer service areas and prepare and submit the required annual reporting documents. In 2010, the JWSC contracted ISE to attempt to gain EPD’s approval to reduce its long-term monitoring requirements in anticipation of additional long-term monitoring requirements and rising costs from a soon to be completed Watershed Protection Plan for the City of Brunswick’s WPCP. ISE successfully worked with and gained EPD approval to significantly reduce the JWSC’s long-term monitoring activities and annual costs.
Contact: Keith Morgan Executive Director 912.261.7112
SELECTED PROJECT EXPERIENCE Watershed Management Consulting Services Glynn County Engineering Department, Glynn County, Georgia Glynn County contracted ISE to provide services associated with the preparation of a countywide stormwater management strategy that is focused on the following: development of a Stormwater Implementation Action Plan; compliance with NPDES Phase II requirements; development of a comprehensive water resources protection ordinance; and evaluation of potential long-term funding options. The ultimate goal of the Stormwater Program Implementation Action Plan was to develop a stormwater strategy that will provide the County with a “road map” to assist with the implementation of a future stormwater management program. Upon completion of the Plan, ISE utilized the recommendations of the report to formulate a NPDES Phase II NOI for the County that would achieve compliance with the NPDES Phase II Stormwater Permit. Development of the NOI involved a great deal of intergovernmental coordination to develop cost-effective compliance strategies. With ISE’s assistance, Glynn County was the first community to receive approval of its NOI from Ms. Barbara Seal with the EPD. Additionally, ISE also assisted the County with the preparation of NOIs and SWP3s for the following County facilities in compliance with the NPDES Industrial Stormwater Permit: Public Works Facility; St. Simons Island Wastewater Treatment Plant; and five County fire stations. One of the major program components recommended by ISE was the development of a comprehensive Water Resources Ordinance that addresses applicable NPDES Phase II compliance elements. In association with the ordinance development, ISE also assisted the County with the development of a Local Design Manual that includes relevant design guidelines and standards. ISE served as a facilitator on the County’s stakeholder group that was tasked with the review and revision of the draft Comprehensive Water Resources Protection Ordinance. ISE’s most recent work with the County involved the preparation of the 2005 Annual Report for the NPDES Phase II Stormwater Permit. ISE worked with various County departments to collect information regarding the implementation of the NOI. ISE submitted the Annual Report in December 2005, and the County received approval from the EPD. In addition to the stormwater management planning work, ISE has also been contracted by the County to perform a Watershed Assessment in anticipation of the Southport wastewater treatment plant expansion. As part of this project, ISE worked with EPD and County staff to develop a new format for Watershed Protection Plans, whereby a Countywide Plan could be submitted initially with area-specific addendums included as new service areas are added or expanded. As the Watershed Protection Plan continues to develop, ISE will ensure that the recommendations in the Watershed Protection Plan mirror the best management practices established as part of the stormwater management program and are coordinated Countywide for all sanitary sewer service districts.
Contact: Paul J. Bruner County Engineer 912.554.7495
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plan Butts County et al. Water & Sewer Authority, Georgia In 2008 ISE completed and obtained EPD approval for a Watershed Assessment and Watershed Protection Plan for the Butts County et al. Water & Sewer Authority (Authority). The Authority was required to conduct a Watershed Assessment and develop a Watershed Protection Plan as part of the permitting process for a recent expansion of its Bucksnort Ranch LAS. The study area included the planned future (2050) service area for the LAS covering the entire Towaliga River watershed within southwestern Butts County. Butts County is located approximately 40 miles south of Atlanta within the Piedmont physiographic province. ISE organized a preliminary meeting with key EPD staff that would be involved in the review and approval of project documents as well as staff from the Authority and Butts County. This meeting allowed ISE to outline the water quality monitoring activities and overall strategy for completing this project and obtain input up front from EPD and Authority/County personnel. As a result, ISE was able to follow-up this meeting with submission of the Water Quality Monitoring Workplan that was quickly approved by EPD. Following approval of the Work Plan, ISE began implementing the Watershed Assessment phase of this project including chemical, physical, and biologic water quality sampling. ISE established seven monitoring locations within this basin at locations based on known stream impairments, current and future development, wastewater discharges, and hydrologic conditions. To reduce costs as desired by the Authority, ISE devised a strategy to utilize Authority staff and resources as much as possible to assist with water quality sampling and analysis. To meet the Authorityâ€™s requirements for final completion, ISE implemented an accelerated schedule resulting in final completion including EPD approvals for the Watershed Assessment and Watershed Protection Plan within an 18-month period.
Contact: Marcie Seleb General Manager 770.775.0042
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plan
IDA Tract RLAS Watershed Assessment, Effingham County, Georgia In late 2007, ISE was subcontracted by Saussy Engineering, Inc. to conduct a Watershed Assessment and develop a Watershed Protection Plan for the service area of a planned Reuse Land Application System (RLAS) in Effingham County. Saussy Engineering, Inc. (formerly the Savannah office of Stevenson and Palmer Engineering, Inc.) contracted ISE for this work as a result of the success of past partnerships in performing a Watershed Protection Plan for another area of Effingham County and a Watershed Assessment and Protection Plan for the City of Port Wentworth, Georgia. ISE held a preliminary meeting with County representatives and EPD staff to introduce and obtain input regarding the planned scope of work and monitoring activities to help facilitate EPD approval of future submissions for this project. ISE developed a Water Quality Monitoring Workplan including chemical and biologic monitoring at five locations in rivers draining the proposed service area. ISE obtained quick approval from EPD for this Workplan allowing ISE personnel to perform dry weather sampling and bacteria geometric mean sampling prior to the end of the summer period (ending in October) which will speed completion of monitoring activities and the overall completion of the project. The monitoring strategy ISE developed for this project includes wet and dry weather chemical and physical sampling, bacteria geometric mean sampling, and biologic sampling including assessment of available habitats and benthic macroinvertebrates. ISE performed a characterization of the watershed to identify known stream impairments, wastewater discharges, potential point sources, land uses that could impact water quality, areas served by septic systems, hydrologic conditions, future development and other features that could influence surface water quality. ISE evaluated the current and future watershed conditions based on the watershed characterization and the water quality results which was summarized in the Watershed Assessment report and submitted to EPD for approval. ISE then developed and submitted to EPD a Watershed Protection Plan based on the findings of the Watershed Assessment which will establish a strategy for protecting water resources in the future as future development continues within this service area.
SELECTED PROJECT EXPERIENCE Stormwater Masterplan Effingham County, Georgia ISE has developed a stormwater masterplan for Effingham County that includes a countywide Drainage Analysis, a comprehensive Water Resources Protection Ordinance and Local Design Manual, a Stormwater Management Implementation Plan that includes basin specific recommendation for stormwater management including regional detention, and a Stormwater Management Program Funding Feasibility Study. In order to complete the Drainage Analysis, an updated GIS project database was developed through the collection of existing information from Effingham County and the Department of Natural Resources. Current and future land use maps were updated through windshield surveys, analysis of aerial GIS data and staff interviews. ISE staff utilized the project database, which included LIDAR and other topographic information for Effingham County to delineate 179 drainage basins based on the major road crossings. ISE staff utilized the future and current land use to establish the existing and future flows within each of the delineated drainage basins. Flows were compared to determine the potential increase in flow related to future development. This data and information on current flooding problems served as the foundation for prioritizing basins for more detailed study of regional detention and other stormwater management control opportunities. Watersheds identified as having the greatest potential for future flooding have been slated for further study to determine the feasibility of regional detention (or other innovative stormwater planning concepts) within the specific watershed boundary. Other considerations such as the use of wetland banking opportunities and expanded floodplains/buffers were also evaluated to address stormwater runoff issues. ISE then developed a comprehensive Stormwater Management Plan that included recommendations for BMPs to mitigate or remediate degraded waters and flooding issues within the drainage basins in the County with emphasis being placed on the priority basins identified through the process described above. ISE evaluated inventory from the project database and results of the drainage analysis to establish a recommended program that will address the needs and unique characteristics of the priority drainage basins utilizing both conventional and innovative strategies. Additionally, ISE worked with the County during the preparation of their Watershed Protection Plan in compliance with the Countyâ€™s NPDES Wastewater Discharge Permit for their new Wastewater Treatment Facility. In order to prevent duplication of efforts and ensure the most cost effective watershed protection program was implemented, it was essential to synchronize both the Stormwater Management Plan and the Watershed Protection Plan since both plans address many of the same issues.
Contact: David Crawley County Administrator 912.754.2105
SELECTED PROJECT EXPERIENCE Watershed Assessment & Protection Plan City of Port Wentworth, Georgia ISE has completed and obtained EPD approval for a Watershed Assessment and Watershed Protection Plan for the City of Port Wentworth in Chatham County. Port Wentworth was required to develop the Watershed Assessment and Protection Plan as part of the NPDES permitting process for the wastewater discharge of the Cityâ€™s new WPCP. For this project, ISE developed a unique monitoring plan designed to accurately assess watershed conditions within the tidally influenced waterways of this coastal community. ISE water resources staff worked closely with EPD personnel, including Ms. Elizabeth Booth and Mr. Andy Kao, to develop a monitoring strategy that would address the unique flow regimes of the tidally influenced streams. Watershed monitoring typically involves collecting dry and wet weather data since the quantity, and often quality, of stream flow is directly impacted by rainfall and runoff. However, in much of coastal Georgia, stream flow is dominated by tidal fluctuations. For this reason, ISE developed a monitoring plan accounting for tidal change that will differentiate water quality from stream flow leaving the watershed during outgoing tide and entering during an incoming tide. Additionally, ISE worked with local biologists familiar with conducting biologic monitoring and analysis in tidal streams. Based on the findings of the Watershed Assessment, ISE developed a Watershed Protection Plan that includes long-term water quality monitoring and incorporates the stormwater management program developed in compliance with the Cityâ€™s recently renewed NPDES Phase I MS4 Stormwater Permit. The Watershed Protection Plan and stormwater management program present best management practices for maintaining or improving water quality in the future, and coordinating these plans will ensure costeffective implementation for the City.
Contact: Philip Claxton City Administrator 912.964.4379
SELECTED PROJECT EXPERIENCE Watershed Assessments for Shoal Creek, Potato Creek & Cabin Creek Basins Public Works & Stormwater Department, City of Griffin, Georgia ISE conducted Watershed Assessments in all of the City’s major watersheds in 2003. Shoal Creek and Potato Creek in the Upper Flint River Watershed, and Cabin Creek in the Upper Ocmulgee Watershed have their beginnings within the City of Griffin. As the location of three headwater drainages, the City was in the unique position of having initial impact on water quality in those drainage basins. The assessments quantified the City’s impact to water quality leaving its jurisdictional boundary, and identified water quality issues within its jurisdiction that had not necessarily been transmitted downstream. The purpose of the assessments was to develop comprehensive watershed-based plans that would improve water quality within and leaving the City’s boundaries. Difficult watershed management decisions required a level of detail gleaned from the assessments that will produce targeted and cost-effective best management practices – both structural and non-structural – for improved water quality. These improvements will not only assist the City in improving the quality of life within its boundaries and beyond, but also adequately address the regulatory issues such as NPDES permits and/or TMDLs that require a financial outlay from the City. The assessments have identified those improvements that will have the most impact on the City’s water quality.
Contact: Dr. Brant Keller, PhD Director of Public Works & Utilities 770.233.4138
SELECTED PROJECT EXPERIENCE BMP Demonstration Project: North Griffin Regional Detention Pond City of Griffin Stormwater Utility Department, Griffin, Georgia ISE has served as the Program Manager and Lead Technical Support organization for the North Griffin Regional Detention Pond Project from 1997 to 2003. The City of Griffin completed construction on the first phase of the North Griffin Detention Pond to manage runoff for the 180-acre North Griffin Drainage Basin in 1998. The pond provides detention for approximately 90% of the upstream basin thus eliminating downstream flooding while also utilizing a wetland filtration system to provide water quality enhancement for approximately 90% of the basin. The second phase of this project involved construction and enhancement of a bioengineering system in 1999 within the pond itself and within the existing forested wetland area downstream of the pond. The bioengineering system within the pond promotes initial breakdown of contaminants present in the stormwater runoff followed by further breakdown of the contaminants as the stormwater runoff flows through the existing forested wetland system downstream of the pond. The bioengineering system for this type of project involves planting selected species of vegetation to naturally â€œfilterâ€? the water and assist in the breakdown and removal of sediments, contaminants, and pollutants from the runoff water. The bioengineering system offers other potential advantages, including simple operation with low maintenance; process stability under varying environmental conditions; and relatively low construction and operating costs. Additionally, the introduction of emergent wetland species will also result in improvement of wildlife habitat while at the same time providing water quality enhancement. The ultimate benefit of the bio-engineering system will be to improve water quality in Shoal Creek that discharges into the Flint River. One of the most important aspects of this project relates to the 5-year performance monitoring requirement as stipulated in the Section 319(h) Grant. In order to accomplish this task, ISE developed a comprehensive QAPP to address the technical procedures related to the monitoring program implementation. ISE worked closely with the Georgia EPD and USEPA to develop the QAPP and secure approval. The monitoring data from several sampling stations within the detention pond system over the last five years has shown that the pond and associated wetland areas are achieving the desired pollutant removal efficiencies.
Contact: Dr. Brant Keller, PhD Director of Public Works & Utilities 770.233.4138
SELECTED PROJECT EXPERIENCE BMP Demonstration: Highway Corridor Non-Point Source Pollution Mitigation Study City of Griffin Stormwater Utility Department, Griffin, Georgia ISE served as the Program Manager and Lead Design Firm for the implementation of the City of Griffinâ€™s TEA-21 Project. In 1999, the City of Griffin was awarded a TEA-21 Grant to provide quantitative data regarding the effectiveness of various water quality BMPs for stormwater runoff that originates along highly developed and urbanized highway corridors. Based on empirical evidence collected and analyzed using both traditional and automated field sampling methods and procedures, the City of Griffin endeavored to show the effectiveness of the proposed BMPs. Successful implementation of stormwater BMPs would have resulted in improved water quality, stabilization of eroded stream banks, reduction in pollutant loadings in downstream receiving waters, improved wildlife habitat, and other associated environmental benefits. The project area lies within the headwaters area of the watershed along an urbanized highway corridor. The project consisted of three phases of work. Phase 1 of the project involved collection and laboratory analysis of stormwater samples originating from along Georgia Highway 16 (Taylor Street) within the Potato Creek subwatershed, followed by analysis of the stormwater quality data. Phase 2 of the project involved evaluation of the water quality data compiled in Phase 1 and implementation of selected BMPs in an attempt to enhance the quality of stormwater runoff originating within the roadway. Phase 3 of the project involved evaluation of the effectiveness of the BMPs implemented to establish their potential for future application. The City then initiated field sampling and data collection activities associated with Phase 3 of the project, and this work continued for an approximate 18-month time period. Comparative analysis information was then compiled into a report to demonstrate the effectiveness of the various BMPs implemented. The National Science Foundation (NSF) Environmental Testing Verification (ETV) Protocol Program contacted the City of Griffin and ISE regarding the unique nature of this project in 2001. NSF was interested in working with the City and ISE with regard to developing a testing program to analyze the pollutant removal effectiveness of the proposed BMP systems. NSF subsequently contracted with ISE to expand the TEA-21 testing program to include protocols established by the USEPA regarding BMP pollutant removal efficiency. ISE developed comprehensive Test Plans for each BMP vendor (totaling six), which outlined the rigorous testing protocols that would be implemented as part of the NSF project. Ultimately, the data compiled as part of this project will be incorporated into the USEPAâ€™s national database regarding pollutant removal efficiencies for stormwater BMPs.
Contact: Dr. Brant Keller, PhD Director of Public Works & Utilities 770.233.4138