Green Infrastructure Demonstration Project for CSO 060
The BSA constructed a Green Infrastructure demonstration project for CSO 060, in the vicinity of Forest and Bird Avenues. This project is one of several included in the BSA’s LTCP Phase 1 Program, which is a list of early-action projects that is included under the recommended alternative of the LTCP. The CSO 060 project, implemented in partnership with the Buffalo Niagara Riverkeeper, is piloting the following green initiatives to establish metrics on these treatment technologies and help to determine the role of green infrastructure in future projects:
- House downspout disconnection/rain barrel installation to divert roof runoff from the sewer system (throughout the study area).
- Rain gardens/infiltration basins located along a typical residential street (Windsor and Parkdale Avenues) and a typical commercial street (Elmwood Avenue).
- Pervious pavement along Clarendon Place.
The use of these green infrastructure technologies are the first of their kind for the BSA and are an opportunity to evaluate green infrastructure technologies as an alternative to separation, which was the original intent of this project. This project also entailed selective separation in conjunction with the green initiatives. The goal is to reduce CSO discharges into the Scajaquada Creek through CSO 060.
The project began construction in spring 2012, and was completed in December 2012. Post-construction monitoring commenced in December 2012 to evaluate the performance of the green infrastructure technologies.
The project was funded, in part, through a grant from the New York State Environmental Facilities Corporation’s Green Innovation Grant Program.
Other Green Infrastructure Initiatives
The BSA continues to explore green infrastructure opportunities including: a downspout disconnect and rain barrel pilot program, a vacant land management program where structures are demolished to create green space for rain gardens, street run-off, etc., and various green treatments on appropriate Department of Public Works and Community Development projects.
Real Time Control Demonstration Projects
The BSA is designing and constructing two real time control (RTC) demonstration projects, one located on Bird Avenue and the other on Lang Avenue (formerly Hagen Street). The use of RTC was identified as a significant component of the BSA’s CSO LTCP. RTC is an innovative technology that maximizes existing system storage capacity during wet weather events to help reduce the frequency and volume of CSOs. The goal of the project is to demonstrate how RTC techniques can be implemented in the BSA collection system to help reduce CSOs, and gain an understanding for any unique issues associated with RTC construction in the City of Buffalo. The demonstration projects will provide the BSA with firsthand experience on actual costs for design, implementation, and operation and maintenance (O&M) of RTC sites. This knowledge and experience will help the BSA plan for future RTC site implementation in Buffalo consistent with the long term incremental approach in the LTCP.
Design for the two RTC sites is complete and construction began in March 2014. The target for project completion is September 2014. Following construction, monitoring will be conducted to evaluate the performance of the two demonstration sites. A Fact Sheet on this RTC project is provided at the link below.
Swan Truck Projects
The following projects were designed in 2012, and went out to bid in November 2012. Construction is expected to begin in March 2013.
- Redirect Flow from Swan Trunk to South Interceptor (Pennsylvania Street): This project is expected to reduce CSO discharges from the Swan Trunk sewer and will take advantage of an existing box culvert at Pennsylvania Street that was part of an abandoned project. By opening the culvert where it crosses the South Interceptor, flow from the Swan Trunk sewer will be redirected into the South Interceptor, using the empty culvert as off-line storage.
- SPP 42 Underflow from Swan Trunk sewer to South Interceptor (Erie Street): The project will reduce flow in the Swan Trunk sewer using available capacity in the South Interceptor and reduce CSO discharges from SPP 42.
- Retain Flow in Swan Trunk at Skyway and Charles Street: This project consists of installing permanent stop logs into a diversion structure on the Swan Trunk sewer. This chamber diverted virtually all flow from the Swan Trunk sewer to the South Interceptor and contributed significantly to sediment accumulation in the Swan Trunk sewer. The stop logs will retain most flow in the Swan Trunk sewer while allowing the diversion of flow during extreme high flows. The increased velocity in the Swan Trunk sewer will reduce future sedimentation.
- SPP 055 to South Interceptor along Exchange Street: This project will reduce flow in the Swan Trunk 27-inch diameter sewer by increasing the capacity of dry weather flow in the Exchange Street sewer. A new sewer will replace the existing 15-inch diameter sewer. The carrying capacity of the new sewer exceeds the predicted peak design storm overflow rate.
- Construct New SPP 42A / CSO 016 Storage: The SPP chamber will be relocated (new SPP 42A) and additional storage in the new chamber will be provided to help reduce overflows to CSO 016.
CSO 015 (Genesee Street) Projects
There are two project related to CSO 015 currently under design. The first one involves modifications to SPP 35 and internal storage for up to 50,000 gallons from the Genesee Trunk sewer to reduce overflows at CSO 015. This project will be bid in January 2013. Overflows from CSO 015 discharge to the Erie Basin Marina, which was designated as a sensitive area as part of the LTCP; therefore, reducing CSOs at this location is priority for the BSA.
The second project involves optimizing SPP 36, which is also tributary to CSO 015. An existing portion of the sewer in this area will be replaced with a new sewer to provide storage and further reduce overflows to CSO 015.
CSO 014 (Wilkeson Ext.) Project
Currently under design, this project will provide off-line storage at SPP 206A/B for up to 400,000 gallons, to help reduce CSO discharges at CSO 014. Overflows from CSO 014 discharge to the Erie Basin Marina, which was designated as a sensitive area as part of the LTCP; therefore, reducing CSOs at this location is priority for the BSA.
Smith Street Storage Project
This project will consist of a combination of in-line and off-line storage to address overflows into the Buffalo River at CSO 026. CSO discharges will be diverted from the CSO 026 outfall into a 600,000 gallon storage tank. Initial thoughts were that when the tank is full, it would overflow to a constructed wetland for further treatment prior to discharge to the Buffalo River; however, other means of control (such as a larger storage tank) may also be considered. This project is anticipated to be bid in the summer of 2013, with construction complete by the end of 2013.