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.
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.
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.
FOR IMMEDIATE RELEASE
(Washington, DC) The District Department of Transportation(DDOT) invites you to a public meeting to present project schedule updates and information regarding the upcoming trail construction phase of the Klingle Valley Trail Project.
What: Public Meeting for the Klingle Valley Trail Project
When: Thursday, September 29, 2016
7 pm to 8:30 pm
Where: Cleveland Park Public Library
3310 Connecticut Avenue, N.W
Washington, DC 20008
Getting to the Meetings
Be sure to check out www.goDCgo.com to learn about transportation options for getting to the workshops.
Do you need assistance to participate?
If you need special accommodations, please contact Cesar Barreto at (202) 671-2829 or Cesar.Barreto@dc.gov five days in advance of the meeting. If you need language assistance services (translation or interpretation), please contact Karen Randolph at (202) 671-2620 or Karen.Randolph@dc.gov five days in advance of the meeting. These services will be provided free of charge.
The first concrete placement for the vertical section of the east retaining wall was completed on 9/01/16. Crews carefully installed formwork for the week prior to the concrete placement, including a specialty formliner that will allow the concrete wall to mimic existing stone and masonry retaining walls. Construction crews are scheduled for one concrete placement each of the next few weeks. Once all concrete is placed and given time to properly cure, the wall will be painted to match the existing and salvaged stones on the project site. The final color is still in the works using small "mock-up" walls so as to best match the color of existing stones.
The project has also begun demolishing and removing materials from the old Klingle Road off site. This work has been completed on the majority of areas just west of Connecticut Avenue and is beginning to move east of Connecticut Avenue. Public notices for this work have been sent out to the neighboring Woodley Park Towers Apartments and Kennedy-Warren Apartment Building to alert residents of potential noise from heavy construction equipment.
The majority of recent work activities revolves around preparations for a retaining wall on the east end of the project - a wall composed of more than 400 cubic yards of concrete. A procedure using special liners within the formwork and staining of the concrete will allow the new retaining wall to mimic existing structures within the area.
Construction has also progressed at the ramp to Porter Street. New sidewalk, curb and gutter, as well as a new curb ramp meeting ADA requirements have been placed along the south side of the ramp.
Stormwater structures, utilities, and walls - lots of walls - comprised the bulk of the KVT project work over the past few weeks. In its heyday, Klingle Road had hundreds and hundreds of linear feet of walls supporting the roadway, the stream channel, and the surrounding drainage structures. Some of these walls are still in great shape and will last for many years to come; others not so much. And a restored stream channel means new pipe culverts and headwalls.
The latest stormwater structure to be built on the KVT project will act as a "relief valve" Klingle Creek at its flattest point along the trail. During heavy storm and flood events, the stream will overflow the bank and collect in a flood control structure. The overflow will travel through two elliptical pipes to a smaller stormwater channel that rejoins Klingle Creek approximately 200 feet downstream. Construction of the structure, as shown in the next two slideshows, was performed in an upstream direction, a standard industry practice.
The crew started from the outfall headwall and installed pipe north towards the stream.
Once the pipe and the outfall headwall were in place, the crew installed the flood control structure. Note that all headwall stone was salvaged from original collapsed walls along Klingle Road.
The contractor also started work on a 210-foot long retaining wall on the eastern end of the trail. The new wall replaces an existing stone wall that collapsed into the creek long ago. Construction on this wall will continue for the next several weeks.
Utility work continues throughout the project. The KVT contractor recently replaced a 100+ year old segment of sanitary sewer pipe along the future trail on behalf of DC Water. Washington Gas also continued gas main replacement along the project footprint, most recently working on the final replacement segment from Klingle Road to Porter Street. Click through the slideshow below for the photos.
The Klingle Watershed Green Streets project is hosting its second design phase public meeting on Monday, June 13th from 5:30-8:30 PM. The meeting will be a walking tour of candidate sites, starting at the intersection of 36th Street and Lowell Street NW. Click here or on the images below for the full meeting flyer.
The Klingle Green Streets project team gave a initial project presentation at the KVT public meeting last November - click here for a link to the presentation.
Underground work continues to be the primary focus on the project, with both storm water and utility work in progress over the past two weeks. Replacement of the collapsed brick culvert that started earlier in May is complete, and the contractor has moved on to other storm water facilities along the future trail.
Brick culvert replacement:
The culvert currently under construction replaces an existing metal pipe that was degraded and clogged. The new culvert will provide additional storm water capacity and will utilize stone from the existing headwalls.
The contractor also started work on the sanitary sewer line that will be replaced just east of Connecticut Avenue.
Washington Gas is nearing completion of its gas main replacement along Klingle Road/Trail. The gas contractor is within the Porter Street Interchange and will soon be close to its final connection point on Porter Street.
Anchor Construction will soon begin sewer rehabilitation work east of Connecticut Avenue along Klingle Road NW. This work will include the excavation, removal, and replacement of existing sewer line. Bypass pumping will be required during the replacement process; pumping will take place during daytime hours only.
Nearby residents may experience construction related noise between 7AM-7PM on Monday-Friday. In the event of inclement weather during the week, Saturday work may also be necessary.
Site preparation and excavation work will take place during the week of May 16; bypass pumping and pipe replacement will occur during the week of May 23. Sewer replacement is expected to be completed by May 27, 2016.
Despite the seemingly endless rain, construction continues on the KVT project. With stream restoration complete, we've made the first production steps along the trail itself, starting with the underground work.
New storm water and drainage pipe will be installed throughout the trail. Much like the gas line replacement, storm drain installation is challenging work, particularly with existing storm drains and utility lines running the full length of Klingle Road.
The first storm water pipe installation started last week, replacing a failed brick masonry culvert that outfalls into Klingle Creek. Scroll through the slideshow below to see the construction sequence.
Work within the Porter Street Interchange has been a key focus area over the past few weeks. Sidewalk installation along the Klingle Road to Porter Street Connector Ramp took place last week (Stage 2A in the graphic below).
Click through the slideshow below to see the sequence of construction along the connector ramp.
Over the past few weeks, the KVT contractor has also focused on constructing new wheelchair and bicycle ramps within the interchange, which are installed in accordance with DDOT and Americans with Disabilities Act standards.
Washington Gas is also progressing gas main replacement east towards Porter Street. Excavation and pipe replacement is now taking place within the active segment of Klingle Road, as seen in the left photo below.
Hello from Klingle Valley! We've had a very productive spring so far, and we're looking forward to continued progress in the warmer months. Let's take a look at what we've done since our last construction update.
The project reached its first major milestone last week with completion of stream restoration work along Klingle Creek. The in-channel stream work required five months of challenging excavation, utility relocation, selective tree removal, and stone structure installation. Stream restoration truly is the heavy lift for the project, and its completion now allows us to start work on the trail.
You may recall from previous updates that the stream restoration work was divided into four segments, shown in the graphic below. Work in Segments 2 and 3 was relatively minor and dealt with stream flow speed rather than erosion control. Segments 1 and 4 are where erosion repairs and channel widening took place, and the transformations are immediately noticeable.
Below are recent photos of the restored Klingle Creek, starting in Segment 1 between Cortland Place and Connecticut Avenue. The banks of Klingle Creek that were once eroded up to 8-9 feet high have now been rebuilt with stone walls, and tiered, vegetated soil lifts. The channel's smooth bed that often flash flooded during rain events is now a series of gently descending step pools. Also, thanks to relocation work by Washington Gas, the gas line behind the Woodley Park Towers that was exposed in the creek for years has been removed and the stream bank has been stabilized with a stone wall.
Looking at Segment 1 in its restored state, it is hard to remember how Klingle Creek looked before construction. Here are a few before and after comparisons.
Segment 4 restoration work included both erosion repair and channel widening east of Connecticut Avenue. This is the area where Klingle Creek was once channeled into a series of underground pipes that routinely clogged and flooded Klingle Road. With a smaller footprint required for the future trail, we were able to construct a channel that follows the natural flow path through the Klingle Valley. In the photos below, you can also see how new vegetation will develop along the stream banks, with small trees (known as live stakes) planted at the immediate edges of the banks and larger tree species planted higher up on the banks.
Again, here are your before and after photos, this time in Segment 4.
In non-stream related construction updates, we've also started work within the Porter Street Interchange. This includes construction of the trail/sidewalk that will connect the Klingle Valley Trail to the Rock Creek Multi-Use Trail. The contractor will also install water quality structures along the new trail and sidewalk. Constructed in cooperation with DC Water, these structures will separate silt and other solids from runoff to reduce pollution in Rock Creek and beyond.
Washington Gas also continues with its gas main relocation work along Klingle Road. In recent weeks, Washington Gas, in cooperation with KVT contractors Anchor Construction and EQR, constructed a new gas lateral feed to the National Zoo just south of the project site. As always, utility relocation work is a daily challenge, with existing underground structures and other utilities always where you don't want them, as you can see below.
To close, here are two wildlife photos from the project, taken by our Stream Restoration Inspector Ricardo Gonzalez of Straughan Environmental.
Thanks to our stream restoration contractor Environmental Quality Resources this photo of Klingle Creek's newest residents. We discussed in the December 30th progress update that some of the trees removed for the new stream channel were reused to construct these root wad structures. This is a great example of the habitat that root structures provide within the creek.
FOR IMMEDIATE RELEASE
DDOT to Temporarily Close the ramp to Beach Drive, NW, from Klingle Road, NW, Beginning February 24
Lane closures in place while DDOT constructs the future Klingle Valley Trail
(Washington, DC) – The District Department of Transportation (DDOT) will close the ramp to Beach Drive, NW, from Klingle Road, NW, beginning on Wednesday, February 24, 2016 at 7 am, weather permitting. This closure is expected to remain until May 2016.
The ramp closure is needed for DDOT to safely construct the new Klingle Valley Trail along the ramp to Beach Drive, NW. The work includes water quality filtration systems, drainage pipe replacement, earthwork, curb and gutter replacement, paving, and guardrail installation.
Motorists who wish to access Beach Drive from Klingle Road should take the middle ramp up to Porter Street across to Beach Drive. A paved walking path will be maintained along the ramp to Beach Drive to allow pedestrian access to the Rock Creek Multi-Use Trail. Signage and protective barriers will also be used to maintain public safety.
Motorists should expect minor delays while using the detour to access Beach Drive from Klingle Road. Motorists, pedestrians and cyclists are urged to stay alert and to obey all construction signs.
The mission of the District Department of Transportation (DDOT) is to enhance the quality of life for District residents and visitors by ensuring that people, goods, and information move efficiently and safely with minimal adverse impact on residents and the environment. Follow us on Twitter for transportation-related updates and more; like us on Facebook and visit the website at www.ddot.dc.gov. Visit goDCgo.com for more information on transportation options in the District.
Today's rain storm/snow melt provided the second test in three weeks of the restored segments of Klingle Creek. Even in their unfinished and un-vegetated states, the step pools, bank armoring, and flow controls are working well. Here are a few videos of the creek in action!
Starting in Segment 1, near Cortland Place:
Moving down to Segment 4, east of Connecticut Avenue:
Also within Segment 4, you can see the Riffle Grade Control and Log Structures described in previous construction updates functioning as designed to reduce flow velocity in the channel.
We've had a busy few weeks at the KVT project. Stream restoration work is nearing completion, and we are starting to prepare for the next phases of the project, to include roadway demolition, storm water and drainage construction, and trail construction.
It should come as no surprise to those in the DC area that the ever-changing weather has had a major impact on the project over the past three weeks.
First there was ice...
...then came the snow...
...which melted and was quickly washed away by the rain.
That said, the new stream features in Klingle Creek held up very well considering they are unfinished and not yet vegetated. The step pools and tailout areas easily handled heavy flow from both snow melt and rain, demonstrating both the added capacity and erosion protection that the stream restoration features provide.
With the remnants of the historic snow storm downstream, the restoration contractor was able to return to work in Klingle Creek. Recent work includes step pool, stone toe (stream bank armoring), and fabric encapsulated soil lift construction.
The contractor also completed a riffle grade control feature, which mimics the naturally-occurring flat areas in streams where the water flows over a mix of river rock and small boulders.
The contractor also started work on clay channel blocks, which span the width of the stream channel and extend 4-5 feet into the earth. Clay is the most dense of all naturally-occurring soil materials, and when well compacted it forms a water tight barrier. The groundwater level in the upper reach of Klingle Creek is high, and these clay blocks will reduce the amount of groundwater that bypasses the stream channel.
Meanwhile, the new retaining wall across from the Woodley Park Towers is nearing completion. The salvaged stone finish is taking shape!
Happy New Year from the KVT project team! We are off to a strong start in 2016, and we plan to make significant progress through the winter and early spring.
The stream restoration contractor is making a strong push to complete Klingle Creek restoration work before in-channel construction restrictions go into effect in March. Three crews are now working in the two main restoration areas, with Segment 4 approximately 75% complete and Segment 1 just under way (Segments 2 and 3 are complete).
The eastern end of stream Segment 4 will realign Klingle Creek to its natural flow pattern. For decades, the creek was diverted under Klingle Road through a series of pipe culverts, eventually emptying back into the natural creek bed further downstream. With the new trail requiring less space than the old road, the creek bed can now be aligned to follow a natural flow path. Additionally, the new channel will have significantly higher flow capacity than the previous stormwater pipe system.
Crews also continue to reestablish the stream banks along Klingle Creek. In addition to the stone toe reinforcement, the contractor is also preparing the banks for new vegetation. The primary means to establish the new banks is through planting soil lifts wrapped in natural coir (coconut) fiber fabric.
The prime contractor continues to work on the new retaining wall across from the Woodley Park Towers building. Crews are installing stone masonry along the concrete wall stem using stone salvaged from previously collapsed historic retaining walls along Klingle Road. The contractor built a temporary tent over the wall and installed heaters to provide appropriate ambient air temperatures for curing the wall mortar. Small heaters are also used to heat the water used to mix the mortar.
Washington Gas started Phase 2 excavation and tie-ins on Klingle Road below the Connecticut Avenue Bridge (left and center photos). Washington Gas also continues gas line replacement in Phase 4 along Devonshire Place (right).
Happy Holidays and (almost) Happy New Year from the Klingle Valley Trail team! We wish everyone a safe, healthy and productive 2016. The new year will bring great transformation to the Klingle Valley, and we aim to have the new trail ready for opening around this time in 2016.
Despite the holiday and rain-shortened production weeks, the KVT contractors have been hard at work along Klingle Creek. Stream restoration east of Connecticut Avenue is moving at full steam, with two crews now at work.Both crews have been excavating the new stream channel, adding stone stream bank reinforcement, and constructing step pools. We even installed our first log placement to create new aquatic wildlife habitat and reduce stream velocity. The logs come from trees that were removed to accommodate the new channel and are embedded in the stream bank with the root wad submerged in the creek.
The contractor is also carefully incorporating existing drainage facilities into the stream restoration features. A good example is a 80+ year old terracotta drain pipe that was trimmed and tied into the stone wall and step pool.
Further upstream, the prime contractor installed the concrete stem for the new retaining wall to be installed opposite the Woodley Park Towers building. Following concrete placement, the wall was backfilled with soil and porous stone. A perforated drain pipe runs along the back of the wall to allow the fill area to drain. The exposed face of the wall will be built with salvaged stone from collapsed retaining walls along Klingle Creek.
Washington Gas is nearly done with Phase 1 replacement (Klingle Road between Cortland Place and Connecticut Avenue). The line is now tied into the existing gas line and will be activated in the next few weeks once Phase 4 is complete (Cortland Place and Devonshire Place).
Stream restoration work has been the priority activity on the project for the past two weeks, with the stream restoration contractor, Environmental Quality Resources, focusing on Segment 4 east of Connecticut Avenue.
The contractor started Segment 4 work by establishing the new stream banks. This was achieved by excavating the existing banks and installing large stones cut roughly into blocks. The blocks (called "imbricated riprap") are stacked in such a way to armor the stream bank and greatly reduce erosion.
On the opposite bank, EQR started installation of fabric encapsulated soil lifts. These soil lifts will be vegetated and will absorb overflow during flood events when complete.
Once the stream banks are built up, the contractor will then install step pools within the stream. Step pools greatly reduce stream flow and erosion by temporarily pooling water before it cascades to the next lower pool. Segment 4 will have 15 step pools when complete. EQR installed the first step pool boulder cluster last week. Boulders for step pool clusters are carefully selected to ensure a watertight fit.
Finally, the contractor removed two Ash trees along Klingle Road that will soon succumb to the Emerald Ash Borer (EAB) epidemic. Given the trees' size and position hanging over Klingle Road, the trees had to be removed for safety purposes. Click here for more information from DDOT regarding Ash trees and the EAB.
If you follow us on Twitter or were listening to your radio the weekend of November 14th, you'll know that the project was the subject of a story on WTOP radio and wtop.com. Click here for the story.
It's been a busy couple of weeks on the Klingle Valley Trail! Stream restoration and retaining wall construction are underway, gas line relocation work continues, and the east entrance to the jobsite is now open for construction traffic.
After two weeks of site preparation and materials deliveries, the stream restoration contractor started work on Segments 2 and 3, shown on the image below.
Stream restoration construction is difficult work. The contractor has to dam up the upstream side of the creek and divert the water flow using a pump and hose system. Once the work area is sufficiently dry, the contractor then excavates the stream bed to provide a stable foundation for the restoration features. In this case, the contractor installed a Stone Toe, which consists of stacked boulders that will prevent future erosion along the stream banks. The stones come from the quarry roughly cut into block shape (called "imbricated riprap"), and must be placed at precise locations and elevations based on the design stream channel levels.
Additional stream restoration site preparation activities took place last week, including access point grading and tree removals. Some of the trees that were removed to accommodate the new stream channel were saved with root wads in tact to be reused in the restored stream. The root structure when placed in the stream creates new habitat for aquatic life.
The prime contractor started work on the first new retaining wall on the project. The wall is near the west end of the trail just behind the Woodley Park Towers building. The wall replaces a stone masonry wall that collapsed many years ago. The wall will serve as one of the banks of Klingle Creek, so the contractor had to take similar steps to dewater the area each day using pumps. With all pump-around activity on the project, the pumps must be turned off by 7 PM to minimize noise disturbance.
The concrete foundation for the retaining wall was installed on Monday, November 23rd.
To maintain the historic character of Klingle Road, the project will reuse much of the existing stone from the area. For the retaining wall, we are salvaging stone from the existing stone walls that collapsed into the creek.
The contractor also stabilized the east entrance of the job site, near the Porter Street interchange. The east entrance is now accessible to construction traffic and will prevent any backups at the west entrance, where Washington Gas continues to work along both Klingle Road and Cortland Place. Look for a new retaining wall to be built along this slope in 2016.
Washington Gas continues its work on the west end of the project. Phase 1 is nearly complete, with 300 feet of pipe left to be installed, and Phase 4 continues along Cortland Place towards Devonshire Place.