Updated Thumbnail History of the Pipe Project (September 3, 2020)
Our Hayfield Road Pipe Project, funded and managed by Fairfax County, is now complete except for landscaping and minor work at the plunge pool. For those who are new to the neighborhood, Hayfield Farm has experienced three 100-year rain-events in the past 25-30 years. Our existing stormwater pipe was not large enough to carry stormwater from major rain events. We had only one large (72-inch) pipe that carried stormwater through Hayfield to the creek behind Hayfield Pool. This new (second) pipe provides additional capacity in carrying water under Hayfield Road to the new plunge pool at the end of Hayfield Road; that water then permeates into the soil and continues into Huntley Meadows Park. The additional pipe thus better manages downstream stormwater flow in major rain events. The project started in September 2019 and concludes in October 2020 after landscaping and tree replacements.
Updates June-July-August 2020
The Hayfield Road Pipe Project Manager, Dave Anglin, will provide an update on this project at the September 16, 2020 HCA general meeting. This will be a virtual meeting via Zoom like the May 20 meeting; click on this link https://bit.ly/3gTUXMU on Sept 16 no later than 7:30 pm to join the meeting. Dave met with HCA President Cathy Seybold, Beautification Chair Mary Millikin and Stormwater Committee Chair John Millikin on July 27 to discuss landscaping plans to include the outfall/plunge-pool area and the medians along Hayfield Road. Where the pipe “daylights”(this is the “outfall/plunge-pool area”) at the end of Hayfield Road by the Hayfield Pool, there will be replantings as well as some improvements to drainage. Along the medians, the plant/tree restorations will occur, basically replacing trees that were removed with the same type trees. Plantings will go in the ground anywhere from late-September to mid-November.
On August 4, after a heavy rain, I sent a short Thank-You note to Project Manager Dave Anglin, Board of Supervisors Chair Jeff McKay and several county and Garney Construction staff thanking them for their work to date because the new pipe was operational and working. The picture below shows the successfully installed pipe carrying its share of stormwater on its way to Huntley Meadows, i.e., beyond the end of Hayfield Road near the Hayfield Farm Swim Club. Thus our new pipe was in place just in time to protect our homes and property when Hurricane Isaias arrived here on August 3. 
As you know, as of August 21, Hayfield Road within Hayfield Farm had been repaved and all damaged curbs were replaced with new curbs. After reviewing the field conditions (gas lines were re-routed), Dave Anglin said that Bridgewater Court would be milled and repaved; this was completed at the same time as the asphalt work at the pool on September 2-3, 2020.
There is a design issue to resolve where the new outfall pipe empties into the plunge pool at the end of Hayfield Road. The outfall pipe “daylights” or opens up at the end of Hayfield Road near the Hayfield Farm Swim Club into the rock armored plunge pool. The surrounding grade may be causing the water to pool higher than the armoring. If this is the case, engineers will ensure that there is positive drainage away from the plunge pool though there is no guarantee that the plunge pool will always dry out after precipitation events. Dave Anglin and staff are working with their design consultant on a new grading plan with the goal to pass outfall discharge through the Park property. This will require several weeks before it can be implemented and is on the schedule to be resolved this fall.
References and Web Sites
Hayfield Farm residents may contact Dave Anglin about any pipe project issues at 703-324-5500 or dave.anglin@fairfaxcounty.gov . For more information about this project, refer to these Hayfield News issues: Oct 2019 “Stormwater Pipe Background,” pp 9, 11 and “Hayfield Road Pipe Conveyance System Update,” pp 11, 13; Nov 2019, page 9 where several websites are listed; one recommended web site is http://www.hayfieldfarmva.com/about-us/stormwater. Other issues include: Dec 2019, pp 11-17; Jan 2020 pp 9, 11; Feb, pp 9, 11, 13; March, pp 11, 13. April, pp 5-7; May, pp 9, 11, 13; June, pp 9, 11, 13. Recent and past Hayfield News issues are located at http://www.hayfieldfarmva.com/newsletters. You can see the Fairfax County website about this project at https://www.fairfaxcounty.gov/publicworks/stormwater/plans-projects/hayfield-road-pipe-conveyance-project
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