Klingle Valley Trail to Temporarily Close

Construction crews are getting ready to go back to work on the Klingle Valley Trail. An existing DC Water stormwater sewer will be replaced to increase its capacity. This sewer has been the cause of some erosion issues during large rain events over the last year at the upper end of the trail. Additional erosion control measures will be implemented along the length of the trail. While upgrading the existing sewer, it will be necessary to close the trail for a portion of the construction as the excavation for the storm pipe and associated drainage structures will make the trail unsafe for users. Please check back for updates on the construction and trail closures as the work progresses.

Trail Opening Coming Soon!

It's been a busy past couple of weeks, but the project has progressed to wrapping up the final construction items. Crews are currently installing final landscaping, trail signage, and 13 park benches along the trail. Once delivered to the site trash receptacles and trailhead signs, providing an area map and history of the Klingle Valley, will be installed at each entrance.

Stay tuned for more details on a ribbon cutting ceremony, as the trail looks to open very soon!

Progress Update

Almost there! Last week crews completed installation of the porous asphalt trail connecting the two trailheads. The trail is comprised of 3" of base asphalt and a 1.5" of surface asphalt. Both lifts allow for stormwater to infiltrate the system and sit in a stone reservoir under the pavement.

This week will be busy with construction activities including: mill & overlay on the east end of the project along Klingle Road, installation of wood fencing on the trail, final landscaping, reconstructing an existing curb cut on the west end of the project, installing signs throughout the trail, hardscaping at both trailheads, pavement striping along the trail, and completing the reconstruction of a historic stone headwall within the Tregaron Conservancy.

Although the project is nearing completion, the trail is not yet suitable for public use. The project ask that the public refrains from entering the construction site until the opening. Check back with the website soon, as DDOT gets closer to confirming a date for the official opening of the Klingle Valley Trail.

Progress Update

Asphalt paving operations began last week. Field crews laid the base asphalt for approximately half of the trail from Courtland Place to the Connecticut Avenue bridge as well as the asphalt sidewalk connecting the Klingle Valley Trail to the Rock Creek Trail.

The asphalt mix used for the trail is porous, allowing stormwater to drain into a stone reservoir while removing contaminants and sediment.

While crews continue to make progress paving the trail, we ask that the public refrains from entering the construction site during all hours.

Progress Update

Over the past two weeks, construction crews have completed four bioretention ponds near the west trailhead, installed wiring for the new LED lighting structures, and began grading of the trail itself.

Final landscaping and paving operations are tentatively scheduled to begin next week, including an asphalt sidewalk on the east end of the project to tie Klingle Valley Trail into the Rock Creek Trail. Prior to paving operations, crews must first complete additional work requested by DC Water on the existing sanitary sewers as well as access the adjacent Tregaron Conservancy property to reconstruct a historic stone headwall.

Progress Update

Although last Tuesday's snowstorm slowed construction progress last week, multiple field crews are completing some key operations this week. Progress on the rehabilitation of DC Water's sanitary sewers will soon be coming to a close. Crews have been able to take advantage of off-peak daytime lane closures on Connecticut Avenue in order to limit the number of nightshifts and disturbances to the public. Click here for the latest schedule of this work. Crews have also begun installation of the bioswale which runs along the north side of the trail. The purpose of the bioswale is to collect and retain  stormwater runoff and remove containments through a matrix of different materials including bioretention soil (comprised of specified percentages of loam, sand, and organic compost), a sand and gravel choker layer, porous stone, and geotextile fabric. Just adjacent to the bioswale, all 52 light poles have been installed within the last 2 weeks. The electrical subcontractor began pulling cable through manholes and into the new light poles this week, as well as installing the LED light-post tops. The type of lighting for the trail was selected due to its dark-sky friendly qualities.

DC Water Sewer Rehab Progress Update

Rehabilitation of the existing DC Water sanitary sewers in the area continues this week. This includes work activities during both daytime and nighttime depending on required traffic control. Click here for the latest schedule of this work.

This work essentially provides a brand new pipe within the existing deteriorated sewer line by a method called cured-in-place-pipe. A polyester resin liner (the yellow material shown in the photos) is pulled through the existing sewer line and is then inverted within the existing pipe and cured with steam in place. A CCTV video inspection is performed both before and after to ensure proper installation.

The rehabilitation work also includes extensive repairs to the manhole. This is performed by a spin casting method using a geopolymer mortar. A "before" and "after" photo of an existing brick manhole is shown below:

DC Water Sewer Rehabilitation

Work for the rehabilitation on the existing DC Water sanitary sewers is scheduled to begin Tuesday, February 21st. For the most current construction schedule for this work please click here. Work will begin on Klingle Rd, NW at Courtland Place during the dayshift. As this work progress onto Connecticut Avenue later in the week there will at time be a need for traffic control operations. In these cases, the work will be performed during nighttime hours. DC Water has issued a public information sheet that describes the work to be performed as well as their contacts for the rehabilitation project. Please note the sewer rehabilition work will be completed in early March not July as shown in the DC Water PIS.

Progress Update - October 20, 2016

Construction crews continue to take advantage of the favorable weather on site and completed all concrete placements of the gravity retaining wall on the east end of the project. Additionally, all foundations for the trail's light poles are now installed in the ground (a total of 52!). Upcoming scheduled activities include installing the electrical manholes and conduits that will power the new pole's LED luminaires.

Progress Update - September 30, 2016

Rainy weather conditions have closed out the month of September on the project. The newly installed step-pools within the stream helped to increase the time stormwater runoff is retained on-site as well as slow the velocity of the stormwater.

 Friday morning view of the step pools in the project's stream restoration segment 1 after experiencing several inches of rainfall in the last few days

Friday morning view of the step pools in the project's stream restoration segment 1 after experiencing several inches of rainfall in the last few days

Although the wet weather has slowed construction activities the last few days, progress was made this month on the new retaining wall on the east side of the project. There is one concrete placement for the wall remaining. Once completed and cured, crews will stain the wall a reddish-brown color to mimic the salvaged storm utilized elsewhere in the project. Form work was removed from some of the first sections of the wall placed, revealing the stone and masonry pattern of the newly placed wall.

Additionally, work began on the new lighting structures for the trail. Construction crews installed over half of the foundations for the new light poles. Once the foundations are all in the ground, conduit and wire will be trenched underground for future powering of the lights. The new light poles are cast iron with a Phillips MetroScape fixture and an LED lighting source.