• Inventory of City Surface Water, Canal and Drainage System:

EBS is currently collecting data for the project, including location of all stormwater structures using GPS, identifying pipe size and material, flood prone areas, collecting topographic maps, and all available information (reports, permits, master plans and studies) at state and local agencies, and reviewing SFWMD permits for stormwater structures identified on private properties for elevation information (rims, inverts, weir crest elevations, etc.).

• Data Analysis, Design and Preparation of Report:

Utilizing existing land use and flood plain maps, EBS will assist PBS&J with prioritizing problem areas, modeling and preparation of report including CADD drawings.

Key tasks:

• GPS data collection
• Pipe size, direction and material identification
• Flood prone areas identification
• Collection of existing information
• SFWMD permit review
• Data analysis and report preparation
• CADD drawings

 

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PROJECT PROFILE 2

OPA-LOCKA AIRPORT NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM (NPDES) STORMWATER MONITORING PROGRAM

 

The Miami-Dade Aviation Department (MDAD) contracted Ecology & Environment, Inc. (E&E) to conduct the storm water sampling/monitoring program pursuant to the NPDES permit requirements for the Opa-Locka Airport, issued by the U.S. Environmental Protection Agency (EPA).

The Opa-Locka Airport stormwater management system consists of a network of culverts, catch basins, and swales which discharge storm runoff into a regional drainage system (canal) operated by the South Florida Water Management District (SFWMD). The sampling was performed at eight outfall locations in the north and south canals adjoining the airport. A sampling program was developed to meet the sampling requirements specified in the NPDES Stormwater Drainage Permit No. FLS000046.

EBS Engineering, Inc. as a subcontractor to E&E, provided the following services:

• Stormwater Sampling Events:

EBS conducted stormwater sampling at the eight outfalls for the four quarters of 2001. Water samples at the eight locations were collected in accordance with applicable specific permit requirements and following the NPDES Storm Water Sampling Guidance Document, EPA 833-B-92-001, July 1992.

Field measurements and sampling protocols were performed in accordance with the EBS’s State of Florida approved Comprehensive Quality Assurance Plan (EBS #980124). All water samples were stored on ice and hand delivered to the MDAD-assigned Miami-Dade contract laboratory to be analyze for pH, oil & grease and total suspended solids.

All sampling events met the storm event rainfall criteria specified in the NPDES permit for the site.

• Report Preparation

EBS prepared an Annual NPDES Discharge Monitoring Report, which included a summary of the outfall sampling event activities, corresponding sampling analytical data, and a summary of all reporting requirements on the Discharge Monitoring Form (DMR-EPA No. 3320-1) for this monitoring period. The rainfall data from this period was used to calculate stormwater discharge flow rates, based on the runoff coefficient method.

Key Tasks:

• Stormwater discharge monitoring
• Surface stormwater sampling
• Stormwater discharge flow rates calculations
• Preparation of report

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PROJECT PROFILE 3

FEMA DORM DRAINAGE IMPROVEMENT PROJECTS

During Hurricane Irene in 1999 and again during the "no-name storm" of October 2000, Miami-Dade County road infrastructure suffered damages due to flooding experienced during those natural events. Miami-Dade County submitted a claim to the Federal Emergency Management Agency (FEMA) for the damages suffered. The claim for these two storm events also resulted in the need to retrofit existing drainage system that cannot be properly cleaned to current standards. Approximately 3,000 sites were eligible for restoration and hazard mitigations measures in order to prevent future damages. These projects are partly funded by FEMA with the county making up the balance.

The work consists of repairing the roadways, including resurfacing and reconstruction. Additionally, drainage systems such as a slab cover trench will be provided and/or replaced to meet the current standards for drainage system (infiltration trench).

Miami-Dade County Department of Environmental Resources Management contracted A.D.A. Engineering, Inc. as a Master Consultant and EBS Engineering, Inc. (EBS) as Design Consultants among other consulting firms. As Design Consultants, EBS is responsible for production of engineering design, which includes the following FEMA procedures:

• Obtain assignments from Master Consultant and also all the back-up documentation for the group of sites to be designed (percolation test, wellfield information, etc.)
• Determine the groups to be designed first.
• Visit sites to be designed to assess the project site, conditions, and constraints; take photographs of site to document conditions; verify project limits and the FEMA approved limit; determine if the appropriate activity for the site has been designated, that is should the project be a resurfacing or reconstruction project; take notes of the existing drainage system. Investigate the routing of the existing drainage by looking inside the inlets. Obtain "as-built" plans from the County; verify the site is in Miami-Dade County public right-of-way and attempt to discuss with the neighbors any drainage concerns they may have within the site area.
• Meet with surveyors and assign task order. Identify to the surveyor the necessary information required for the designer to design the proposed improvements required for the area.
• Prepare design package report.
• Perform drainage calculations.
• Finalize roadways plans.
• Prepare cost estimates.
• Perform QA/QC procedure.
• Submit package to Lead Master Consultant.

Key tasks:

• Design for roadway reconstruction, milling and resurfacing
• Drainage improvements design
• Prepare packages for permitting and bidding of the projects
• Prepare cost estimates