- Stormwater Department
- Capital Projects
The Village’s Capital Improvement Program constructs structural improvements that address existing drainage deficiencies and also funds equipment purchases. Stormwater capital projects are prioritized by the project rating system, as recommended by staff and approved by the Village Council on an annual basis. Each year the Council approves a potential list of capital projects based on the estimated revenue available for the forthcoming year. The 2022-2023 Project Ranking list is available now.
Drainage Capital Improvement Projects
|Project Location/Name||Issue||Resolution||Total Project Cost|
|2677 Knob Hill||Upstream flooding due to the inadequate outfall and culvert capacities during storms.
||VOC purchased lot 2677. Removed the piped stream and restored the stream back to a more natural state. This helped reduce flooding upstream and improved water quality in the neighborhood.
|Breckingridge Lane||Sinkholes were forming around the roadway caused by improper original installation of the drainage system.||Removed the existing 24” concrete system and installed a new 42” RCP system with an upstream headwall and a downstream flared end section and rip-rap dissipation pad.
|Gardenspring Drive||Experienced road flooding caused by the existing culvert system being undersized.||
Removed the existing 30 inch RCP and replace with two 48 inch RCP's running parallel to each other.
||Original drainage system had several occurrences of sink holes due to the separation of the drainage system from poor installation measures.
||Removed existing 60" and 66" and installed new 66” RCP.
||Residences experience occasional property flooding and runoff that frequently overtopped the road.
||Removed 30" RCP and replaced with 6' x5' concrete box, with headwalls at both upstream and downstream locations to the culvert.
*Price not finalized
|Harper Valley Lane
||Road Flooding and sinkholes due to undersized and failing drainage system, creating debris build-up in system.
||Removed the compromised 30" and 36" pipes and replace with new line in the same location as well as add a supplemental line to account for future development upstream.
||Road flooding due to the stormwater runoff from an adjacent subdivision discharging across private property, and then entering into an undersized drainage system.
||Removed a portion of the existing undersized driveway drainage system. Installed new headwall and supplemental 24" RCP line to help prevent flooding and erosion from occurring.
||Roadway flooding during large storm events due to undersized culvert.
||Removed 42" culvert and replaced with a 7' x 6' reinforced concrete system was installed. Along with upstream and downstream stabilization of the area to prevent erosion.
||Original 90" x 66" culvert was undersized, causing residential flooding.
||Removed 90" x 66" culvert and replaced with 8' x 5' double box culvert with rip rap and a headwall on both upstream and ownstream sections to protect the channel from eroding.
||Occasionaly experienced flooding due to an undersized drainage pipe with inadequate inlet conditions.
||Removed existing 24" RCP and replaced the existing culvert with a 42" RCP to reduce the occurrence of road flooding.
||A failure occurred on the private property portion of the drainage system and caused excessive amounts of sediment build up, which ultimately caused the intersection to flood after every rain event.
||Able to locate buried pipe system to find the clog. Re-routed the drainage system back onto the public right of way and installed a new 15” reinforced concrete system along Springfield Farm Rd.
||Final segment of the roadway was constructed with no drainage system in place. Significant upstream watershed dumping into this neighborhood caused road flooding.
||Installed a new 24” reinforced concrete system along Springpath Trail, while also adding cross lines on the other side of the street to help prevent the overwhelming effect on the inlet structures.
2021 CIP Projects
Springfield Farm and Knob Hill Intersection 2021
After years of complaints from citizens and drivers, the Springfield Farm and Knob Hill intersection drainage conflict was resolved. The drainage system in this intersection was installed by a developer, and it left the public right of way and conveyed stormwater across private property before re-entering the public right of way. A failure occurred on the private property portion of the drainage system and caused excessive amounts of sediment build up, which ultimately caused the intersection to flood after every rain event. Clemmons Stormwater staff were able to work with the property owner in order to dig down to uncover the pipe system and find the clog, and re-route the drainage system back onto the public right of way, but behind the curbing. This allowed stormwater to continue to flow, but at a lesser construction cost due to the lack of cutting the street and repairing curbing and asphalt. The Village of Clemmons was able to utilize stormwater funds to install a new 15” reinforced concrete system along Springfield Farm Rd, while also jetting and clearing the remaining portions of the clogged system.
Mendelssohn Drive CIP was added to the list in 2009, and would often times see roadway overtopping in large storm events. This system also caused a negative impact to the upstream drainage systems and property owners as well. Village of Clemmons Stormwater staff partnered with Jewell-LJB Consultants to develop a design for the FEMA designated floodway. The third-party consultants worked with the Army Corps of Engineers, NC Division of Water Quality, NC Land Quality and Winston-Salem Floodplain Services to generate a plan that would satisfy all entities. This project is one of four projects along Johnson creek that will be analyzed together in a “No-Rise” certification for FEMA. The Village of Clemmons was able to utilize stormwater funds to install a new 7’x6’ reinforced concrete system underneath of Mendelssohn Drive, Along with upstream and downstream stabilization structures.
2020 CIP Projects
Lakefield Court 2020
Lakefield Court had several occurrences of road flooding due to the stormwater runoff from an adjacent subdivision discharging across private property, and then entering into an undersized drainage system. Stormwater funds were used to remove a portion of the existing drainage system and to install a supplemental line, as well as an upstream and downstream structure to help prevent erosion from occurring.
Breckingridge Lane 2020
Breckingridge Lane CIP was added to the list recently, and was reported by a property owner that was noticing sinkholes around the roadway and on their property. After further inspection, it was found that a developer had installed a concrete drainage system without appropriate connections, and that system was beginning to show signs of failure. The sinkholes were witnessed by Stormwater staff and found to be relatively close to the public roadway, causing this project to be a major public safety risk. The Village of Clemmons was able to utilize stormwater funds to remove the existing 24” concrete system and install a new 42” RCP system with an upstream headwall and a downstream flared end section and rip-rap dissipation pad.
Springpath Trail 2020
Springpath Trail CIP was added to the list in 2009, and was primarily caused by the 2008 recession. Lack of funds resulted in the final segment of the roadway being installed without any drainage system within it. With a significant upstream watershed dumping into this neighborhood, and ultimately on the streets, a significant amount of water was often seen traveling down the curb line until it reached the next available drainage inlet, which was often times overwhelmed. A portion of the existing drainage system was undersized, and needed to be removed. The Village of Clemmons was able to utilize stormwater funds to install a new 24” reinforced concrete system along Springpath Trail, while also adding cross lines on the other side of the street to help prevent the overwhelming effect on the inlet structures.
Glenngariff Road 2020
The Glenngariff road drainage system had several occurrences of sink holes due to the separation of the drainage system from poor installation measures. In depth analysis of the drainage system showed that a contractor had installed a 66” reinforced concrete pipe underneath of Glenngariff, but on the upper side, had connected a 60” reinforced concrete pipe to it without an adequate junction structure. During routine outfall inspections, stormwater staff noticed significant separation of the pipes underneath the road and felt that there was a significant public safety risk in this location. Stormwater funds were used to completely remove/install the 66” RCP.
Harpervalley Lane 2019
Harpervalley Lane also had several occurrences of road flooding due to debris build-up and continuous upstream development causing increased runoff. The drainage system under the roadway was undersized and starting to deteriorate. Large sinkholes were forming along the right of way due to compromised pipes and structure connections. Stormwater funds were used to remove all of the old drainage system and to install a new line in its pre-existing location, as well as a supplemental line to account for future development and debris clogging.
Gardenspring Drive 2014
Project Gardenspring Drive had several occurrences of road flooding due to the stormwater runoff from a section of Interstate 40 and Harper Road. The existing culvert under Gardenspring was undersized and could not convey the impacting stormwater volume. Stormwater funds were used to remove and replace the existing culvert to prevent flooding and reduce the occurrence of road overtopping.
Quinn Street 2013
Quinn Street periodically experienced flooding due to an undersized drainage pipe and inadequate inlet conditions. The quantity of runoff exceeded the allowable amount the culvert could convey. Stormwater funds were used to upgrade the existing drainage system to adequately pass the stormwater runoff and reduce or eliminate the frequency of road overtopping
Knob Hill Drive 2011
This project located just off of Knob Hill Drive was completed at the end of 2011. The Public Works’ staff "daylighted" the stream by removing the pipe the stream flowed through and redirected the water through a channel. The goal was to restore the stream back to a more natural state. This project helped reduce flooding and improved water quality in the neighborhood.
View the Map of CIP Projects (PDF).