Commodity Codes: 91244 Excavation Services

The project involves analysis of existing conditions to determine portions of the storm drainage system needing improvement, and design and construction of needed improvements. The existing storm system experienced a pipe collapse due to poor condition of the pipe. To address the request and meet level of service design standards the project will remove and replace the existing Storm Drainage Infrastructure within the project scope.
Proposed improvements include removing approximately 343 LF of 18″ storm water pipe and replace with approximately 410 LF of 24″ storm water pipe, add 2 double catch basins and associated items, and remove and replace approximately 357 LF of 8″ sewer pipe, and 3 sewer manholes.

The scope of this project will be the installation of approximately 160 LF of concrete block retaining wall to address severe bank erosion.

Proposes to rehabilitate and repair high-hazard dam discharge infrastructure, under drains, and storm drainage infrastructure at both Linda Lake and Oakwood Dams.

The Gleneagles Project is primarily focused on replacing an existing CMP culvert near 3810 Gleneagles Road.  The existing culvert is 8.7’ high by 7.8’ wide and is being replaced with a 10’ wide and 7’ tall RCBC.  The culvert replacement is occurring to address aging infrastructure and to improve the reliability of infrastructure for the traveling public.  In support of this culvert replacement, we are dredging the downstream pond which is located on the Quail Hollow Country Club near the 15^th hole.  The dredging will remove sediment that has built up near the downstream end of the existing culvert and prevent sediment transport downstream which would negatively impact existing ponds and habitats.  In addition, we will be adding inlets and upgrading roadside drainage on Out-Of-Bounds Drive which has significant spread in larger storm events from road drainage.  The work on Out-Of-Bounds Drive will increase the safety of the traveling public using that roadway during rain events.

There is an existing wetlands system and stream adjacent to the Bruns Academy that are in need of improvements. The intent of this project is to reset an existing wetlands system to its original design and provide enhancement, where applicable. Wetland restoration efforts will include regrading, sodding and planting of vegetation,  installation of a new pedestrian bridge and retaining wall.  Additionally, stream improvements, such as regrading banks and adding riffles, are proposed. The proposed improvements will enhance the overall performance of the system for conveying and treating stormwater.

The Hastings/Princeton Storm Drainage Improvement Project will reduce street and structure flooding throughout the neighborhood. Located within a drainage area of approximately 80 acres, the project will replace aging infrastructure and provide adequate system capacity. The project area is bordered by Wellesley Avenue to the north, Hastings Drive to the south, Selwyn Avenue to the east and Jamestown Drive to the west.

Old Plank portion of project: Project initiated due to failure of 84” CMP system on Old Plank Rd. City plans to remove and replace 86” CMP with 56LF 8’x7’ RCBC; Add (2) concrete wingwalls;

Caldwell Williams portion of project: Project initiated due to road flooding. City plans to replace (2) 60” CMP pipes with 39 LF of 13×5 Box culvert. City also intends to add 40LF of 18” RCP; (2) Double catch basins and (2) concrete wingwalls; Pavement and curb replacement.

Project initiated to permanently fix what was an old AFT project. City intends to replace the existing 12’x8’ CMP and replace with approx. 50 LF of 10×8 RCBC; Add (2) concrete wingwalls; (4) CBs; (1) JB; Asphalt and curb replacement; Tie existing sewer crossing into a separate system (2) SSMH’s and approx 30 LF of 8” DIP; 15 LF 15” PVC

Project initiated due to failure of 96” system. City plans to remove and replace 96” CMP with 62LF 9’x6’ RCBC; Add (2) concrete wingwalls; Add (1) DCB CLDS 20.03; Add (1) CLDS 20.05; Add (2) NCDOT 840.01 CB’s; City plans to add approx. 87 LF of 15” RCP; Curb and gutter replacement; pavement resurfacing.