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Niver Creek MDP and FHAD
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project deliverables

The project will be completed in four distinct phases: Baseline Hydrology Report, Alternatives Analysis, Flood Hazard Area Delineation (FHAD) Report and Conceptual Design Report. Each phase is designed to be a stand-alone document that can be accessed by the public. A draft report is submitted to the project sponsors for each phase, the project sponsors review the report, any necessary changes are made to the report, and then a final report is submitted.

Phase 1 - Baseline Hydrology Report

The baseline hydrology is the development of detailed and accurate hydrology to quantify the peak stormwater flows associated with different return frequency storm events. The hydrology will be evaluated for the 2-, 5-, 10-, 25-, 50- and 100-year return period storm events for existing land uses. The Niver Creek watershed is a primarily fully developed watershed with minimal changes anticipated for zoning and land use changes, thus the project sponsors have determined that the existing conditions hydrology will be the same as the future conditions hydrology. Only the future conditions hydrology will be produced for this report. The baseline hydrology results will identify the extent of surface flooding and identify problem areas.

Phase 2 – Alternatives Analysis

The alternatives analysis will investigate improvement scenarios to ensure the most appropriate design recommendations. Three multiple alternatives will be evaluated and may include the following:

  • Improve timing of peak flows along tributaries to reduce peak flows downstream
  • Maximize detention opportunities
  • Improvement of infrastructure sizing and capacity
  • Enhance trail connectivity

Phase 3 – Flood Hazard Area Delineation

The FHAD identifies floodplain limits, water surface elevation profiles for the 10-. 50-, 100- and 500-year storm event. As a part of the FHAD, the 500-year existing conditions hydrology will be developed based on the information from the Baseline Hydrology Report. The FHAD Report will include flood maps, flood profiles and floodplain/floodway data tables (if applicable). Components from the Baseline Hydrology Report will be included in the FHAD.

Phase 4 – Conceptual Design Report

A conceptual design will be done for the recommended plan from the alternatives evaluation. The recommended plan will be selected based on a number of factors including cost, benefit, risk, constructability and feasibility.

available documents

Documents will be available to the public once they are accepted by the project sponsors.
Report
Final Baseline Hydrology Report
Date of Completion
April 2015
Downloadable PDF
nivercreek_hydrologyreport_april_2015.pdf
File Size: 36448 kb
File Type: pdf
Download File

Final Alternatives Report

Final Conceptual Design Report
Final FHAD
October 2015

December 2016
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nivercreek_draft_altsreport_october2015.pdf
File Size: 24334 kb
File Type: pdf
Download File


niver_creek_mdp_conceptualreport_final_20161214_reduced_stamped.pdf
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This project website is for informational purposes only.  Refer to project contacts for specific questions.