Loren Data Corp.

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COMMERCE BUSINESS DAILY ISSUE OF APRIL 17, 1995 PSA#1326

4th Contracting Squadron, 4 CONS/LGCV, 1695 Wright Ave, Seymour Johnson AFB NC 27531-2459

B -- STUDY AND BASELINE QUALITY ASSESSMENT OF CANAL SYSTEM Sol. F31610-95-B0007. Due 050595. Contact: A. Denise Marshall, 919/736-6546, ext: 233, Contracting Officer, Bobbie C. White, 919/736-5497, ext: 241. Services nonpersonal to furnish all labor, tools, parts, materials, facilities, and transportation necessary to inspect, quote, and provide the following services: Conduct flow mechanics study and baseline water quality assessment of the canal system at Dare County Range (DCR), North Carolina (NC). The DCR is a 46,000 acre Air Force practice bombing range located in northeastern NC. The range is crisscrossed by over 100 miles of drainage canals. The canals were dug for a variety of reasons including fill material for roads, fire control, and drainage. The water in the canals originates from rainfall on the site and from tidal action. Rainfall averages around 45 to 50 inches per year. No rainfall records exist on site. Typical canal parallel roads and range in width from 16 to 25 feet. Depth ranges from six to eight feet. Often one bank side will be covered by heavy vegatation. Very little is known about the actual movement of water through the canal netowrk. The canals are connected to each other and either directly or indirectly to Whipping Creek, Milltail Creek, Stumpy Point Bay, and Long Shoal River. Tidal action of one to one and one-half feet causes water to flow in and out of the canals. In the late 1980s, the US Geological Survey conducted a tide level study in Albermarle Sound with the objective of developing a flow model. Culverts with stop logs are being installed at canal-road junctions throughout the range for control. Operation of the stop logs will be entirely manual. No means exist to monitor the water level changes resulting from changes in the stop settings. OBJECTIVE: The purpose of this study is to establish firm data concerning water quality and water movement on DCR. Data obtained during this study will provide a baseline for further hydroloy work at the range. SCOPE OF WORK: Flow Mechanics Study. Water in any given canal can move in any given direction depending on levels in adjacent canals. No meaningful assessment of water quality can begin without understandin how water moves through the canals on the range. The purpose of the flow mechanics study is to provide basic information on water movement so that other studies can proceed. The flow mechanics study will consist of two parts. First, the geometry of the system must be determined. Second, some general idea of the direction and quantities of flow must be obtained. Channel Geometry. The purpose of the channel geometry study is to document the following items: (a). Length and location of all canals on the range (b). Average geometry of each canal on the range. (c). Relative elevation of all canal junctions on the range (d). Relative elevation of all control structures on the range (e). Geometry and flow characteristics of all control structures on the range. The Contractor shall be responsible for the following: Visit each canal, measure the length, locate on a map, and name the canal section corresponding to the road it parallels. Each canal shall be photographed. Measure a typical cross section in each canal (width, depth, roughness). Measure relative elevation of all canal junctions on the range using global positioning system (GPS) surveying equipment. (Elevation accuracy to 10mm). Visit all control structures. Measure relative elevation of each control structure using GPS equipment. Measure width, depth, and roughness of each control structure. Photograph each control structure. Basic Flow Assessment. The basic study will take place during a one-day period. All key canal junctions on the range will be visited, either by truck or boat, and discharge measurements made to determine quantity and direction of flow. Local tides will be recorded. Discharge measurements shall be made by standard meters. All flow measuring equipment shall remain the property of the government. Baseline Water Quality Assessment. The baseline water quality assessment will be carried out at the same time as the basic flow assessment. Sample of DO, temperature, pH, and conductivity will be taken with automated equpment at the same time that flow measurements are made. Point measurements will be made at regular intervals (approximately 1/4 mile) throughout the canal system. GPS data will be recorded along with the measurements to keep track of position. Maps shall be developed to indicate the variation of DO, temperature, pH, and conductively. These maps will clearly indicate areas with basic quality problems. All measurement equipment shall remain the property of the government. DELIVERABLES AND DELIVERY SCHEDULE: Contractor shall provide written report, including maps of the flow mechanics study within 30 days after completion of the field work. Contractor shall provide written report, including maps of baseline water quality assessment within 30 days after completion of field work. GOVERNMENT FURNISHED MATERIALS: Government shall furnish canoe of john-boat. CONTRACTOR QUALIFICATIONS: Contractor shall have a good working knowledge of the DCR area including the road and canal systems, Alligator River, Pamlico Sound, and Crotan Sound. All work shall be accomplished or supervised by a professional hydrologist. This solicitation is set-aside for small businesses. Request for solicitation shall be in writing and include a nine digit zip code, available from your local post office. Telephone request will not be honored. FAX requests will be accepted, the fax number is (919) 705-2983. (100)

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