Town of Wrightsville Beach
DEPARTMENT OF PUBLIC WORKS
200 Parmele Boulevard
Wrightsville Beach, N.C. 28480
(910) 256-7935 • FAX 256-7939
Sewer Line Cleaning for FY19/20
The Town of Wrightsville Beach is seeking proposals and estimates for cleaning and color video inspection and recording of approximately 10,000 feet of sewer line. The area of cleaning/color video recording is noted on the attached photo by blue lines and a summary of the sewer line lengths is included in the enclosed table.
General. The most common pipe material is clay pipe and the diameters vary from 6” to 8”, with the majority of the pipe in the 8” range. The greater part of the cleaning is on side streets. The side street mains are connected to the main gravity line manhole by outside drop connections. During cleaning, materials/debris shall not be allowed to by-pass and flow downstream of the segment being cleaned. The work will also occur along DOT roadways and the contractor will be responsible for any and all necessary traffic control/devices. Hours of operation are 8:00 am – 5:00 pm, Monday through Friday, unless otherwise specified.
Disposal of Material. Disposal of material collected from the sewer lines will be at the Cape Fear Public Utility Authority; either Northside WWTP or Southside WWTP complex. As such, the contractor must coordinate activity with the Authority. The Town will be responsible for disposal costs.
Inspection Reports. A comprehensive written report (.pdf and hard copy) of the inspection is required. This report must identify line segment direction of travel (upstream/downstream), the location of defect(s) (in feet from start of video), a defect score (1-5, 1 being minimal and 5 being severe) and an estimate of infiltration. In addition to the written report, a complete color video report must be provided which includes a CD, DVD, or flash drive of the work with each segment as a separate file. The videos recorded must be well lit; this will require auxiliary lighting for the camera unit. During video recording, the upstream flow, and any pump station flows, must be stopped in order that infiltration may be determined – any flow stopping must be coordinated with the Town.
SSOs and Spills. The contractor shall be responsible for any sanitary sewer overflows (SSOs), or spills that occur as a result of his actions. The sewer line cleaning project interacts with a force main from two pump stations; LS 3 (south end – 2 Iula St) and LS 4 (Harbor Island). The force main from LS 3 connects into manhole in front of Carolina Yacht Club (338 S Lumina) and the force main from LS 4 connects into the manhole at N. Lumina Avenue and Stone Street. Since video of the lines may require the flow through the affected sections to be suspended by plugging the upstream lines into specific manholes, care must be taken in order to prevent backing up sewer into houses or causing a sewer spill. The Town should be contacted to coordinate the station shut downs during video work of sections downstream of the force mains. As the lines become deeper, this may cease to be necessary. In addition, care should be used to avoid over-pressurizing the lines during cleaning and resulting in water being forced out of water traps in dwellings and residences. The contractor may coordinate for use of the Town fire hydrants for water; backflow protection is required.
Proposals/Bids. Proposals/bids will be evaluated on the basis of combined clean and video pricing. All bids/proposals pricing should be per foot of sewer line and should show the price per foot to clean and the price per foot to video. Also included in the proposal should be any costs for mobilization/demobilization. Additional cleaning may be provided at the agreed upon rate. Proposals should be provided no later than 12/02/2019 at 3:00 pm. The work should be completed prior to 3/1/2020. The Town shall not be responsible for lost or damaged equipment and reserves the right to reject any and all bids. The successful bidder must provide copies of Workmen’s Compensation Insurance and Liability Insurance ($1,000,000) with the Town named as an additional insured.
For questions or additional information, contact:
Public Works Director
Town of Wrightsville Beach
200 Parmele Blvd
Wrightsville Beach, NC 28480