Riverside Drive Stormwater Mitigation Project

The existing auxiliary concrete spillway for North Harbor Lake at 600 North Harbor Drive is currently failing, resulting in roadway flooding. The downstream slope has recently experienced erosion behind the retaining wall. This project involves replacing the existing 1420 square-foot concrete spillway and 48" area inlet with a 1760 square-foot concrete spillway and 84" drop inlet. The project also involves installing 190 linear feet of poured curb and 1730 square feet of grouted riprap as overflow measures. Associated work with the spillway installation includes minor grading and a geotechnical inspection of the saturated subgrade. Associated stormwater infrastructure work includes the modification of an existing junction box, and removal and reinstallation of a 12" HDPE storm pipe. Questions are due no later than March 8, 2023, 5:00 p.m Complete all Work within one hundred twenty (120) calendar days All questions or requests for clarification must be sent via Bonfire under Message - Opportunity Q&A: https://sandysprings.bonfirehub.com/projects/75373/details are due nolater than October 17, 2022, 5:00 p.m. Questions received after this date and time may not be answered.

Division 31 -	Earthwork, Earthwork Methods.
Division 32 -	Exterior Improvements, Bases, Ballasts, and Paving, Flexible Paving, Asphalt Paving, Rigid Paving, Concrete Paving, Curbs, Gutters, Sidewalks, and Driveways.
Division 33 -	Utilities, Instrumentation and Control for Utilities, Water Utilities, Water Utility Distribution Piping, Water Utility Distribution Equipment, Disinfecting of Water Utility Distribution, Water Utility Storage Tanks.