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Lewes, Delaware
Jim's Towing Service
February 3, 1995     Cape Gazette
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February 3, 1995

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12 - CAPE GAZE'IWE, Friday, February3 - Febt, uary 9, 1995 Stormwater Continued from page 1 related to development." Barwick said his department is not only concerned with the quan- tity of stormwater and sediment running off a parking lot, a build- ing roof, or a development site. "We're also concerned with the quality of run-off. Stormwater can be nasty stuff. Oils, fluids, brake dust, tire wear-off - tires are made from an incredible recipe of chemicals. We want to keep that out of the waterways." Fisher company's design Stormwater from the Fisher Company's Rehoboth Beach out- lets will eventually find its way northward to Pot Hook Creek. Delaware's Department of Trans- portation (DelDOT) maintains a system of stormwater pipes along Rt. 1 that carries water to an out- fall that flows into Pot Hook at its beginnings near Troop 7 north of Lowe's. (Pot Hook Creek flows easL eventually transforming into Wolfe Glade behind Wolfe Runne near the canal.) Because the DelDOT system can handle only a very limited amount of stormwater, the Fisher Company had to design a system that would release stormwater into Canby Continued from page 1 However, ex officio members representing state agencies sel- dom attend the commission's meetings. County officials have expressed the need to obtain expertise from state agencies when making zon- ing decisions. Del. Sen. Robert Voshell, D- Milford, has introduced a bill to add representatives from the Delaware Department of Agricul- ture and the Sussex County Vol- unteer Firemen's Association as non-voting members of the Sus- sex County Planning and Zoning Commission. Canby said she hopes to address the need for public transit services in western Sussex County. Gov. Thomas R. Carper's proposed budget for fiscal year 1996 recom- mends allocating $71,500 to es- tablish transit services in western and central Sussex County. Sussex County Council has re- quested that DelDOT explore the potential of a park-and-ride facili- ty in the Georgetown area to com- pliment the existing park-and-ride program in coastal Sussex Coun- ty. Residents have expressed the need for a transit service that would allow residents in the west- ern portion of the county to get to jobs in the resort area, where there is a shortage of workers during the summer season. Gov. Carper's recommended capital budget for fiscal year 1996 earmarks $93 million for the transportation department. The proposed budget allocates $25.5 the DelDOT pipes at a very con- trolled rate. For example, rain from a heavy storm one day may be released into the DelDOT sys- tem from the Fisher site over a pe- riod of a couple of weeks. What happens to that water in the mean time7 That's where the system of large pipes installed be- neath the parking lot and two re- taining ponds will come into play. According to Barwick, stormwater will flow from the parking lot into the huge pipe sys- tem and begin making its way to- ward two holding ponds. Tapered pipes leading to the ponds will slow the progress of the stormwa- ter so it can't fill the ponds quick- ly to overflowing. Rather, the pipes will serve as a storage sys- tem as well as a draining system. The ponds in turn will constrict the flow of water into DelDOT's system. "The system has to be able to handle rainwater generated by what we predict will be the largest storm in any ten year period," said Barwick. The ponds, said Barwick, will also be planted with vegetative matter designed to capture and break down pollutants over time. Water. in the ponds will have to rise to a certain level before it falls over the lip of a receiver pipe which will then direct the water to million for system preservation and $8.3 million for system man- agement projects designed to alle- viate the need to construct more highways. Public workshops, which will focus on the economy, develop- ment, infrastructure and quality of life, are tentatively planned in each county. A workshop is tenta-" tively scheduled March 8 in Sus- sex County. A statewide tele- phone survey is also planned. After receiving public input, the Cabinet Committee on State Plan- ning Issues will develop a "vi- sion" document listing key goals and specific actions, Canby said. DelDOT is currently in the process of developing a state transportation plan, which the de- partment plans to complete this year. Sussex County had hoped to re- vise its land use plan by the end of 1994. However, county officials may delay the project while the state works on its transportation plan. The county hopes to mesh the planning efforts of the state transportation plan, as well as pro- grams developed by the Delaware Department of Natural Resources and Environmental Control (DNREC), into the land use plan. Both the county land use plan revisions and the state transporta- tion plan are required, by law, to be adopted in 1995. Carper has proposed legislation that would extend the effective date of county land use plan revisions one year to December of 1996. The bill would give the state sufficient time to amend and adopt state plans that reflect local comments and will ensure that counties incorporate state plans into their county plans. the DelDOT system. During dry periods, the ponds themselves will be dry and grassy. "We expect sunlight and bacter- ial action in the roots of the vege- tation to break down the pollu- tants in the run-off," said Bar- wick. "If necessary, any build-up in the ponds will be hauled off to an approved disposal site, We will make annual inspections to ensure that the system continues to operate as it is designed." The Kmart system The Kmart designers took ad- vantage of sandy soil on its site to maximize the area it could use for parking lot. Stormwater from its extensive parking lot will flow f'wst into catch basins which will then direct the flow toward an era- banked retention area at the edge of the stream feeding Holland Glade. (Holland Glade is a tidal creek that branches off Lewes-Re- hoboth Canal and winds around the northern border of The Glade community.) Because it didn't v;,ant to reduce its parking area to make room for ponds, the Kmart system includes a set of pipes from its deep but small retention area that returns water from that area back beneath the parking lot. Vegetation in the retention area is expected to clean the water of pollutants before it reaches the height where it will begin flowing back beneath the parking lot. Because of the sandy soil, the returning water is expect- ed to disperse rapidly beneath the lot. Barwick said the Kmart reten- tion area also includes a small out- flow pipe to the nearby stream, a vegetative area to capture pollu- tants, and a slightly lower length along the creekside bank of the re- taining area that is covered wit h rocks. That rocky length is ex- pected to bear the brunt of a flow of water from a one hundred year storm and prevent such a storm Dennis Forney photo John Barwiek of the Sussex Conservation District stands inside the embanked retention area built to serve the stormwater control needs of the new Kmart along Rt. 1. from knocking out the side of the embanked area entirely. "We're pretty confident that the retaining area is pretty bullet proof," said Barwick. "Croll Construction, which built the system, was very cooperative in making changes along the way which we felt were necessary because of that site Previous to construction, there was a heavy root system out there - some 200 year oaks - and sandy soil that had us concerned." Stormwaier from the roof of the Kmart building, because it is not expectedto contain pollutants as will the parking lot run-off, will go directly underground for dis- persal beneath the parking lot, said Barwick. "The system represents a cre- ative solution to the stormwater problem," said Barwick, "as do the others. It's interesting because each of the solutions we're seeing is different." The Ocean Outlets plan Barwick said run-off from the expansion of the Ocean Outlets east of Rt. 1 will also flow toward Holland Glade. Their system, said Barwick, will include two wet ponds which will function as manmade wetlands. "All of the nasties from the parking lot will flow into the wet ponds," said Barwick. "They have a great ca- pacity for cleaning. From the wet ponds, the water will flow into a grassy swale leading toward Hol- land Glade. Then there will be a series of check dams along the length of the swale designed to slow the flow of the water and en- courage it to drain down into the earth rather than directly toward the stream." Barwick said his agency tends to be very strict on matters of quality and quantity. "We want the systems to work properly," he said. "But we also work closely with people to be practical and cost effective. The process has come a long way since the law was changed in 1991 to better control stormwater and sediment. We keep a close eye on things." Barwick said monitoring wells are installed as part of the process and during construction "we do inspections two to three times a week. It's an important job that's being done and we want it done right," said Barwick. 4k Toumadoos an cho ehlh I/   Call ,or reservations.227-0615