The document is a scoping report for a stormwater master plan in Nipigon, Ontario. It outlines the purpose of the master plan, which is to evaluate existing stormwater infrastructure, identify deficiencies, and develop an implementation plan. It discusses conducting watershed characterization, assessing infrastructure effectiveness, identifying improvement opportunities, and determining an asset management framework. The report scope includes determining key priorities and issues and available resources for coordinated stormwater management efforts in Nipigon Township. It is the first phase in developing a more comprehensive stormwater management assessment and watershed restoration plan for Clearwater Creek.

1. Nipigon Stormwater Scoping Report
Sample Site Conditions, Watershed Data, Roles
and Responsibilities
Dr. Robert Stewart
Faculty of Science and Environmental Studies

2. • The purpose of a Stormwater Master Plan is to provide an
integrated process to evaluate existing infrastructure and
policies, identify drainage system deficiencies, and develop an
implementation plan, including capital planning estimates and
possible funding mechanisms for a long-term sustainable
program, including policy to manage stormwater, within
municipal boundaries
Context

3. • A characterization of the existing environmental conditions for all watersheds within
municipality.
• An assessment of the effectiveness of existing stormwater management infrastructure
at reducing the negative impacts of stormwater on the environment, including the
consideration of the potential impacts of climate change on the effectiveness of
existing infrastructure.
• The identification of new stormwater measures, retrofit opportunities or improvements
to existing infrastructure that could improve the level of water quality and flow
capacity.
• A determination of the framework for an Asset Management model that incorporates
costs of capital, operations and maintenance, and replacement with a life-cycle
approach.
• An identification of recommended strategies for stormwater management in the
municipality; and
• A Recommended implementation plan
A Master Plan often includes:

4. • The purpose of this scoping report is to determine the key
priorities, issues and resources available for coordinated
stormwater management efforts in the Township of Nipigon.
• It is the first phase of a more comprehensive stormwater
management assessment required in the development of a
Stormwater Management Master Plan (SWMMP), and
Watershed Restoration Plan (WRP) for Clearwater Creek.
Stormwater Scoping Report

5. Year 1 (2013-2014) Master Plan Scoping Study
• Develop suitable reference sites within the Town of Nipigon
watershed. These reference sites can be used for comparison to
assess the level of impact tributaries exposed to urban municipal
discharge
• Examine tributaries within the city limits, identify the extent of
ecosystem impairments, characterize contaminant sources, and
provide inventory of physical characteristics to identify areas of
concern (i.e. stormwater outfalls, severe erosion, impacted buffer,
utility crossings, stream crossings, channel modification etc.)
• Offer mitigation options and pollution prevention strategies to
improve conditions within impaired tributaries

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Site Notes:
Stage 2 enhancement measure for Clearwater Creek. Well
established vegetation, however site has not been maintained.
Site: 1
St. Edwards School
Retention Catchment
Stormwater
2013:09:04 11:36:54

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Site Notes:
Retention tank at Site 1
Site: 1
St. Edwards School
Retention Catchment
Stormwater
2013:09:04 11:36:59

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Site Notes:
Spillway from retention pond to Clearwater Creek - exposed
cobble from path of drainage. (could be re-vegetated to improve
retention and reduce erosion.
Site: 1
2013:09:04 11:37:09

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Site Notes:
Clearwater Creek looking upriver. High turbitity from erosion.
Sediment contribution from upstream east side of creek major
outfall from First Street (Site 4); Harkness Street runoff into St
Edwards lot and down by platform.
Site: 1
2013:09:04 11:38:46

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Site Notes:
From CN line North of tracks down to ravine. Remediated site
using boulders. View is a well vegetated and established section.
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 11:54:29

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Site Notes:
Top of Ravine looking back toward Nipigon Cafe. Vegetation
established. No overland drainage problems reported.
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 11:54:34

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Site Notes:
Drainage pipe from Nipigon Cafe. Newly replaced with rip rap
rock to prevent further erosion. However no soil or vegetation
cover. Also need to ensure boulders are sealed with fine material for
vegetation to establish. Temporary fix.
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 12:00:55

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Site Notes:
Left of half pipe shows where rip rap fills in previous erosion.
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 12:04:31

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Site Notes:
Fish passage and erosion control / enhancement works in creek
below half pipe. No seal of fine materials established for
vegetation and erosion reduction. Need to monitor vegetation
growth. Area also has noticable floodplain. Need to assess
hazard potential and mitigation of fish passage measures. Need
to ensure pool/riffle sequence. Potentially clear culvert for fish
passage
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 12:07:24

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:44:42

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Site Notes:
Site: 3
Drainage Outfall from Nipigon Cafe
2013:09:04 11:56:09

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:32:18

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:36:08

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:36:31

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:37:07

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:32:31

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Site: 3
Initial Trip by Rob Stewart - 08/27/2013
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Site Notes:
2013:08:27 14:35:09

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Initial Trip by Rob Stewart - 08/27/2013
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Site Notes:
2013:08:27 14:46:45

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:50:37

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:50:39

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Site Notes:
Site: 3
Initial Trip by Rob Stewart - 08/27/2013
2013:08:27 14:51:41

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Site Notes:
Site: 4
2013:09:04 12:19:14

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Site Notes:
Grassy swale by hospital. Water obscured by vegetation.
Site: 5
2013:09:04 12:26:31

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Site Notes:
Site: 6
2013:09:04 12:32:07

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Site Notes:
Site: 6
2013:09:04 12:32:22

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Site Notes:
Site: 6
2013:09:04 12:56:44

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Site Notes:
Site: 7
2013:09:04 12:44:50

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Site Notes:
Site: 7
2013:09:04 12:45:41

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Site Notes:
Site: 7
2013:09:04 12:45:53

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Site Notes:
Site: 9
2013:09:04 12:52:54

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Site Notes:
Site: 9
2013:09:04 12:53:52

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Site Notes:
Site: 9
2013:09:04 12:54:19

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Site Notes:
Site: 9
2013:09:04 12:54:25

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Site Notes:
Site: 11
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Site: 11
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Site: 11
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Site: 11
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Site: 11
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Site: 11
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Site: 12
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Site: 12
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Site Notes:
Site: 12
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