Phase 3 Drainage Project - Outfalls & Basin

City Council tasks the Planning Commission with developing a strategy to address drainage problems.
Completed: Aug 22, 2017
2017
Planning Commission begins discussing the issues and meeting with experts regarding next steps.
Completed: Sep 20, 2017
September 20, 2017
Planning Commission concludes that the next stormwater priority should be to improve the outfalls between 30th and 41st Avenues.
Completed: May 9, 2018
May 9, 2018
After interviewing several firms the Planning Commission recommends that City Council Enter into an agreement with Thomas and Hutton.
Completed: Oct 11, 2018
October 11, 2018
City Council approves award of a contract to Thomas & Hutton in the amount of $100,800 for surveying, needs assessment and conceptual design of Phase III Drainage Project.
Completed: Nov 27, 2018
November 27, 2018
City Council approves a proposal from Thomas & Hutton for small but high impact drainage projects in the basin along the Phase 3 Drainage project area.
Completed: Mar 26, 2019
March 26, 2019
City staff presents proposal to improve five (5) drainage deficient areas located on the basin between 30th and 41st Avenue.
Completed: Jul 23, 2019
July 23, 2019
City Council approves change order from Thomas & Hutton for small but high impact drainage projects in Phase 3 and issues approval of design, engineering, and permitting of Phase 3 Drainage Project.
Completed: Aug 27, 2019
August 27, 2019
City Council approves proposal in the amount of $18,900 for a conceptual assessment of the elevation of the Waterway Boulevard path to provide added protection from rising tidal waters.
Completed: Jun 23, 2020
June 23, 2020
City Council approves FY21 budget including funding for the small but high impact drainage projects and construction of the Phase 3 Drainage Project.
Completed: Jun 23, 2020
June 23, 2020
City Council approves a change order in the amount of $30,000 for Thomas & Hutton to conduct bidding and construction administration services for the small but high impact drainage projects.
Completed: Jul 28, 2020
July 28, 2020
The City submits a grant application to the Rural Infrastruction Authority for grant funds towards the construction of Phase 3 Drainage Project.
Completed: Sep 14, 2020
September 14, 2020
The City advertises RFB 2020-06 seeking bids for the construction of the small but high impact drainage projects.
Completed: Sep 27, 2020
September 27, 2020
City staff will hold a pre-bid meeting with interested bidders to provide an overview of the project and answer questions.
Completed: Oct 8, 2020
October 8 2020
Deadline for submission of proposals for the construction of the 5 small but high impact drainage projects.
Completed: Oct 29, 2020
October 29 2020
Utility relocations begin
Completed: Mar 1, 2021
March 1 2021
Drainage pipe installation - 41st Avenue
Completed: Mar 15, 2021
Mid March
Drainage pipe installation - Sparrow DriveDrive
Completed: Apr 1, 2021
Early April
Drainage pipe installation - Forest Trail
Completed: Apr 15, 2021
Mid April
Drainage pipe installation - Cross Lane
Completed: Apr 29, 2021
End of April
Council approves change order to Thomas & Hutton to include bidding and construction oversight of the 30th & 36th Ave Outfall Projects.
Completed: Jul 27, 2021
Jul 27 2021
Bid packet for construction of 30th & 36th Ave Outfall is released to prospective bidders.
Completed: Sep 14, 2021
Sep 14 2021
City holds pre-bid meeting with prospective bidders for the construction of 30th & 36th Ave Outfall Projects.
Completed: Sep 24, 2021
Set 24 2021
Deadline for bids for the construction of the 30th & 36th Avenue Outfall Project.
Completed: Oct 15, 2021
Oct 15 2021
City opened bids for the construction of the 30th and 36th Outfalls
Completed: Nov 10, 2021
Nov 10 2021
City Council approves a contract to Quality Enterprise in the amount of $2.27M
Completed: Nov 17, 2021
Nov 17 2021

The City has initiated the third phase of a project to improve storm water and tidal drainage across the island. This project is intended to make significant drainage improvements to the 30th, 36th and 41st Avenue outfalls which will improve conditions on the amount of standing water events experienced by residents and property owners.

The project began in 2017 when City Council tasked the Planning Commission with developing a strategy to address drainage problems. As part of the project, smaller but impactful drainage improvement projects along the basin will also be addressed. These are located at Sparrow Drive, Forest Trail, Cross Lane, 32nd Avenue and 41st Avenue.

The construction of the 30th and 36th Avenue outfalls began in early 2022 and expected completion in 2023. The construction of the drainage improvements to the 41st Avenue outfall is scheduled to begin in the fall/winter of 2023. 

Project Updates

Phase 3 Drainage Update - February 2022
Tuesday, February 15, 2022

30th & 36th Avenue:

  • Contract executed
  • Supply lead times are causing issues that will impact original schedule.
  • Steel wire mesh that goes inside the concrete pipes. Suppliers rationing steel.
  • Box culvert 6 month lead time. New start date for 30 th Avenue outfall construction in early April, golf course work completed by June, road work on Waterway July August.
  • Road work on the 36 th Avenue outfall between September-October

41st Avenue:

  • Wetland permit (OCRM and USACE) still pending. City has conditional approval from OCRM. All other permits are contingent on the wetland permit.
  • City received $1.4M grant from the SC Office of Resilience from CDBG MIT funds for construction.
  • Mitigation Most cost effective option for the City is to purchase mitigation credits. Mitigation project evaluated would be more costly: construction, monitoring and ongoing maintenance.
Phase 3 Drainage Update - January 2022
Tuesday, January 18, 2022

30th & 36th Avenue:

  • Contract with Quality Enterprise executed.
  • Supply lead times are causing issues that will impact original schedule.
  • Steel wire mesh that goes inside the concrete pipes. Suppliers rationing steel.
  • Box culvert - 6-month lead time
  • Staff is evaluating alternate schedule and materials. Meeting with Wild Dunes tomorrow to discuss alternate schedule that would minimize impact to golf course operations.

41st Avenue:

  • Wetland permit (OCRM and USACE) still pending. City has conditional approval from OCRM. All other permits are contingent on the wetland permit.
  • Mitigation – Most cost-effective option for the City is to purchase mitigation credits. Mitigation project evaluated would be more costly: construction, monitoring and ongoing maintenance.
November 2021
Tuesday, November 16, 2021

City opened bids for the construction of the outfall improvements at 30th and 36th Avenue on November 10, 2021 and received two (2) bids:

  • Gulfstream Construction --$3,062,461.70
  • Quality Enterprises --$2,270,822.51


Ways and Means, City Council to consider award of a contract to Quality Enterprises on Wednesday, November 17, 2021.

A Notice to Proceed and kick off meeting will be issued/scheduled after executing contract.

Internal Drainage Project at 41st Avenue and Forest Trail Complete
Thursday, October 28, 2021

The contractor has completed the drainage and road paving work at 41st Avenue. The road is fully opened to traffic.  

Phase 3 Drainage Outfalls Update - October 2021
Tuesday, October 19, 2021
  • All permits on hand for the construction of the 30th and 36th Avenue outfalls.
  • The City held a bid opening on Friday, October 15th. Only one bid was received, therefore, it was not opened. To solicit more bids and encourage a competitive process, the City and Thomas & Hutton discussed potential changes to the RFB language to address challenges encountered by prospective bidders.
  • Provide greater flexibility to contractors to propose alternate materials (with approval from engineers) from those specified in the RFB to address the challenges w/ material shortages.
  • Include Forest Trail in the scope of work, not as an alternate since City has all permits on hand.
  • The plan is to issue a revised RFB this week and open bids and have a recommendation for award of a contract to Ways and Means Committee and Council at the regular meetings in November.
Phase 3 Drainage Internal Projects Update - October 2021
Tuesday, October 19, 2021

All portions of drainage projects at Sparrow Drive, Forest Trail, Cross Lane, 32nd Avenue and 2 portions of the project at 41st Avenue are completed.

41st Avenue & Forest Trail 

  • Gulfstream doing final pressure testing on the relocated utilities on Monday, 10/18
  • New drainage pipes to be laid down week of 10/18, and paving scheduled for Friday, 10/22.
  • If work proceeds as scheduled, with no additional complications, final walkthrough and project closeout on week of 10/25.

Pages