AK NPS KATM 10(4)_Katmai_Compiled SWPPP.pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Federal Highway Administration Western Federal Lands Highway Division

Table of Contents

SWPPP TABS

TAB 1: SWPPP Narrative

TAB 2: APDES Permit (Construction General Permit)

TAB 3: NOI, ADEC Acknowledgement, Other Applicable Correspondence

TAB 4: Delegation of Authority

TAB 5: Site Maps (Indicate Wetlands, Waters, other Waterbodies)

TAB 6: Erosion/Sediment Control Plan Sheets (Plan Set and BMP Typical Details)

TAB 7: Revegetation Plan (if applicable)

TAB 8: SWPPP Amendment Log

TAB 9: Inspection Reports

TAB 10: Corrective Action Log

TAB 11: Water Quality Monitoring, Reporting Requirements, and Reports

TAB 12: Training Certificates and SWPPP Training Log

TAB 13: Government-Selected Waste, Borrow, Staging Sites (Indicate BMPs at Each Site)

TAB 14: Grading and Stabilization Log

TAB 15: Hazardous Spill Plan or Spill Prevention, Control, and Countermeasures (SPCC)

TAB 16: Endangered Species Act (ESA) & Cultural Resources (Section 106) Documentation

TAB 17: Quality Assurance Checklist

TAB 18: APDES Notice of Termination (NOT)

Tab 1 - SWPPP Narrative

Revise and update as needed per SCR 107 and SCR 157

Storm Water Pollution Prevention Plan (SWPPP)

PROJECT NAME: Rehabilitate Valley of 10,000 Smokes Road, Phase IV DATE: 1/30/2023

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 1 of 38

ALASKA DEPARTMENT OF ENVIRONMENTAL CONSERVATION

2021 CONSTRUCTION GENERAL PERMIT

SWPPP TEMPLATE

Instructions

To help you develop the narrative section of your construction site SWPPP, the DEC has created this electronic SWPPP template, designed to guide you through the SWPPP development process and ensure your SWPPP addresses all the necessary elements stated in the Construction General Permit (CGP). You should use this template with the Alaska Storm Water Guide, available on the ADEC’s website at http://dec.alaska.gov/media/13246/akswguide.pdf.

This template covers the SWPPP elements required by Alaska’s construction general permit; however, you must customize this template to reflect the conditions at your site.

Using the SWPPP Template

Each section of this template includes “instructions” and space for “project information.” You should read the instructions for each section as you complete the project information. This template was developed in Word so you can easily add tables and additional text. Some sections may require only a brief description while others may require several pages of explanation.

Tips for completing the SWPPP template

If there is more than one construction operator for your project, consider coordinating development of your SWPPP with the other operators. Multiple operators may share the same SWPPP, but make sure responsibilities are clearly described.

Modify this SWPPP template so it meets the needs of your project. Consider adding permit citations in the SWPPP when you address a specific permit requirement.

http://dec.alaska.gov/water/wastewater/stormwater/guidance/ http://dec.alaska.gov/media/13246/akswguide.pdf

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 2 of 38

Storm Water Pollution Prevention Plan For

AK NPS KATM 10(4): Rehabilitate Valley of 10,000 Smokes Road, Phase IV 1000 Silver Street, Building 603

King Salmon, AK, 99613

(907) 469-0651

Operator(s)

FHWA

PE - TBD

Insert Address

Insert City, State, Zip Code Insert Telephone Number

Insert Fax/Email

SWPPP Contact(s)

FHWA

Cyrus Bullock 610 East 5th Street

Vancouver, WA 98661 360-619-7964

Cyrus.bulloc@dot.gov

SWPPP Preparation Date 1/30/2023

Estimated Project Dates Start of Construction Completion of Construction

5/1/2023 10/31/2024

APDES Project or Permit Authorization Number:

AKR10H05E

https://www.google.com/search?q=katmai+national+park&ei=O8TzYv3MA9OkptQPyI69iAo&gs_ssp=eJzj4tTP1TcwjC-xNDJgtFI1qDA1S7VMNkpNNUpKMjE1sTS1MqgwSTZJMTBPSjVITU1MtUwz8hLJTizJTcxUyEssyczPS8xRKEgsygYA4AcWCA&oq=katmai&gs_lcp=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&sclient=gws-wiz

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 3 of 38

RECORD OF SWPPP AMENDMENTS

Date of Revision Section Description

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 4 of 38

OPERATOR PLAN

AUTHORIZATION/CERTIFICATION/DELEGATION

(To be signed by Responsible Corporate Officer)

I state that based on my review this SWPPP meets the minimum requirements of the Construction General Permit and that the Project Engineer (PE) has day-to-day operational control of the project site. The PE and contractor is responsible for the maintenance and implementation of the SWPPP including inspections, documentation, and application of the Best Management Practices at the site. The contractor will notify all subcontractors of the requirement of this SWPPP. The PE has operational control over the project specifications, including the ability to make changes to the project specifications.

I hereby designate the PE, SWPPP Administrator as my authorized representative. This designee is responsible for the overall operations of the site and will be responsible for the implementation of the Storm Water Pollution Prevention Plan, compliance with the Construction General Permit, selecting and implementing additional Best Management Practices as conditions warrant, and signing all inspection reports required.

I certify under penalty of law that this document and all attachments were prepared under direction of Scott Smithline in accordance with a system designed to assure that qualified personnel properly gathered and evaluated the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.

Signature Date

Scott Smithline Environmental Manager Printed Name Title

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 5 of 38

(Intentionally left blank)

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 6 of 38

TABLE OF CONTENTS

1.0 PERMITTEE (5.3.1)

1.1 Operator(s)/Contractor(s)

1.2 Subcontractors

2.0 STORM WATER CONTACTS (5.3.2)

3.0 PROJECT INFORMATION (5.3.3)

3.1 Project Information

3.2 Project Site Specific Conditions (5.3.3)

4.0 NATURE OF CONSTRUCTION ACTIVITY (5.3.4)

4.1 Scope of Work

4.2 Project Function (5.3.4.1)

4.3 Support Activities (As Applicable)

4.4 Sequence and Timing of Soil-disturbing Activities (5.3.4.2)

4.5 Size of property and total area expected to be disturbed (5.3.4.3)

4.6 Identification of All Potential Pollutant Sources (5.3.4.5)

5.0 SITE MAPS (5.3.5)

6.0 DISCHARGES

6.1 Locations of Other Industrial Storm Water Discharges (5.3.8)

6.2 Allowable Non-Storm Water Discharges (1.4.3; 4.3.7; 5.3.9)

7.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO TOTAL MAXIMUM DAILY LOADS (3.2, 5.6)

7.1 Identify Receiving Waters (5.3.3.3)

7.2 Identify TMDLs (5.6.1)

8.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO ENDANGERED SPECIES (3.3, 5.7)

8.1 Information on Endangered or Threatened Species or Critical Habitat (5.7.1)

9.0 APPLICABLE FEDERAL, STATE, TRIBAL, OR LOCAL REQUIREMENTS (4.15)

10.0 CONTROL MEASURES/BEST MANAGEMENT PRACTICES (4.0; 5.3.6)

10.1 Minimize Amount of Soil Exposed During Construction Activity (4.2.2)

10.2 Maintain Natural Buffer Areas (4.2.3)

10.3 Control Storm Water Discharges and Flow Rates (4.2.5)

10.3.1 Protect Steep Slopes (4.2.6)

10.4 Storm Water Inlet Protection Measures (4.3.1)

10.5 Water Body Protection Measures (4.3.2)

10.6 Down-Slope Sediment Controls (4.3.3)

10.7 Stabilized Construction Vehicle Access and Exit Points (4.3.4)

10.8 Dust Generation and Track-Out from Vehicles (4.3.5 and 4.3.6)

10.9 Soil Management (4.3.7)

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 7 of 38

10.10 Authorized Non-Storm Water Discharges (4.3.8)

10.11 Sediment Basins (4.3.9)

10.12 Dewatering (4.4)

10.13 Soil Stabilization (4.5, 5.3.6.3)

10.14 Treatment Chemicals (4.6; 5.3.6.4)

10.15 Treatment Chemicals (4.6.1)

10.15.1 Treatment Chemical Use Procedures (4.6.2)

10.15.2 Application of Treatment Chemicals (4.6.3)

10.16 Active Treatment System Information or cationic treatment chemicals (4.6.7)

10.17 Good Housekeeping Measures (4.8)

10.17.1 Washing of Equipment and Vehicles (4.8.1)

10.17.2 Fueling and Maintenance Areas (4.8.2)

10.17.3 Staging and Material Storage Areas (4.8.3)

10.17.4 Washout of Applicators/Containers Used for Paint, Concrete, and Other Materials (4.8.4)

10.17.5 Fertilizer or Pesticide Use (4.8.5)

10.18 Spill Notification (4.9)

10.19 Construction and Waste Materials (4.8.6, 5.3.7)

11.0 INSPECTIONS (5.4; 6.0)

11.1 Inspection Schedules (5.4.1.2; 6.1; 6.2)

11.2 Inspection Form or Checklist (5.4.1.3; 6.7)

11.3 Corrective Action Procedures (5.4.1.4; 8.0)

11.4 Inspection recordkeeping (5.4.2)

12.0 MONITORING PLAN (If Applicable) (5.5; 7.0)

12.1 Determination of Need for Monitoring Plan

12.2 Monitoring Plan Development

12.3 Monitoring Considerations

13.0 POST-AUTHORIZATION RECORDS (5.8)

13.1 Additional Documentation Requirements (5.8.2)

13.1.1 Records of Employee Training (4.14; 5.8.2.7)

14.0 MAINTAINING AN UPDATED SWPPP (5.9)

14.1 Log of SWPPP Modifications (5.9.2)

14.2 Deadlines for SWPPP Modifications (5.9.3)

15.0 ADDITIONAL SWPPP REQUIREMENTS (5.10)

15.1 Retention of SWPPP (5.10.1)

15.2 Main Entrance Signage (5.10.2)

15.3 Availability of SWPPP (5.10.3)

15.4 Signature and Certification (5.10.4)

15.5 Submittal of a Modification to NOI (2.7)

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 8 of 38

APPENDICES

A. Site Maps and Drawings (refer to Tabs 5 and 6) B. BMP Details (refer to Tab 6) C. Project Schedule (refer to latest project schedule provided by Contractor) D. Supporting Documentation: (refer to Tabs 11 and 16)

• TMDLs

• Endangered Species

• Other Permits or Requirements

E. Delegation of Authority, Subcontractor Certifications (Refer to Tab 4) F. Permit Conditions: (Refer to Tabs 2 and 3)

• Copy of Signed Notice of Intent

• Copy of Letter from ADEC Authorizing Coverage, with ADEC NOI Tracking Number

• Copy of 2021 Construction General Permit

G. Grading and Stabilization Records (Refer to Tab 14) H. Monitoring Plan (If Applicable) and Reports (Refer to Tab 11) I. Training Records (Refer to Tab 12) J. Corrective Action Log (Refer to Tab 10) K. Inspection Records (Refer to Tab 9)

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 9 of 38

(Intentionally left blank)

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 10 of 38

1.0 PERMITTEE (5.3.1)

Identify permittee and any subcontractors.

1.1 Operator(s)/Contractor(s)

Operator Information Organization: Name: Title:

FHWA, Western Federal Lands Highway Division (WFLHD) TBD – Project Engineer Project Engineer Phone: Fax (optional): Email:

(360) 619-7964 Enter Text cyrus.bullock@dot.gov Mailing Address: Street (PO Box):

610 East Fifth Street City: State: Zip:

Vancouver WA 98661-3801 Area of Control

Day-to-day operational control of those activities at a site which are necessary to ensure compliance with a SWPPP or other permit conditions.

Owner/Operator Information Organization: Name: Title:

Katmai National Park

Derick Derby Sean Meleen

Engineering Equipment Operator Maintenance Supervisor

Phone: Fax (optional): Email:

(907) 469-0651

Enter Text derick_derby@nps.gov sean_meleen@nps.gov

Mailing Address: Street (PO Box):

1000 Silver Street, Building 603 City: State: Zip:

King Salmon Alaska 99613 Area of Control

Operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications.

Contractor Information Organization: Name: Title:

TBD TBD Enter Text Phone: Fax (optional): Email:

Enter Text Enter Text Enter Text Mailing Address: Street (PO Box):

Enter Text City: State: Zip:

Area of Control Day-to-day operations during construction with oversight from PE.

Repeat as necessary.

https://www.google.com/search?q=katmai+national+park&ei=O8TzYv3MA9OkptQPyI69iAo&gs_ssp=eJzj4tTP1TcwjC-xNDJgtFI1qDA1S7VMNkpNNUpKMjE1sTS1MqgwSTZJMTBPSjVITU1MtUwz8hLJTizJTcxUyEssyczPS8xRKEgsygYA4AcWCA&oq=katmai&gs_lcp=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&sclient=gws-wiz mailto:derick_derby@nps.gov

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 11 of 38

1.2 Subcontractors

Subcontractor Information Organization: Name: Title:

N/A Enter Text Enter Text Phone: Fax (optional): Email:

Enter Text Enter Text Enter Text Mailing Address: Street (PO Box):

Enter Text City: State: Zip:

Enter Text Enter Text Enter Text Area of Control Insert Area of Control (if more than one operator at site)

Repeat as necessary to include all subcontractors.

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 12 of 38

2.0 STORM WATER CONTACTS (5.3.2)

Identify the qualified persons responsible for the following required positions (note: a small project may have all these responsibilities carried out by one person):

• Storm Water Lead (5.3.2); person updating the SWPPP (5.3.2.2); Person(s) Conducting Inspections (5.3.2.3); Person(s) Conducting Monitoring (if applicable, 5.3.2.4), and Person(s) Operating Active Treatment System (if applicable, 5.3.2.5).

• Document that the named individuals are Qualified Persons as described in CGP Appendix C. Include documentation of qualifications in Tab 4 of the SWPPP.

Qualified Personnel Responsibility

Storm Water Lead

FHWA, WFLHD

TBD - Project Engineer 610 East Fifth Street Vancouver, WA 98661 Telephone # Fax/Email

Authority to stop and/or modify construction activities as necessary to comply with the SWPPP and the terms and conditions of the permit.

Storm Water Lead TBD – Contractor’s Lead Address Telephone # Fax/Email

Authority to modify BMPs and update SWPPP as needed to comply with the SWPPP and the terms and conditions of the permit.

SWPPP Preparer

FHWA, WFLHD

Cyrus Bullock 610 East Fifth Street Vancouver, WA 98661

(360) 619-7964 Cyrus.bullock@dot.gov

Possess the skills to assess conditions at the construction site that could impact storm water quality. Familiar with Part 5 as a means to implement the permit.

Storm Water Inspector Same as Storm Water Lead Name Address Telephone # Fax/Email

Assess conditions at the construction site that could impact storm water quality. Assess the effectiveness of any erosion and sediment control measures selected to control the quality of storm water discharge, and familiar with Part 6 as a means to ensure compliance with the permit.

Monitoring Person (If Applicable) Company Name Address Telephone # Fax/Email

Knowledgeable in the principles and practices of water quality monitoring who is familiar with Part 7 and the monitoring plan for the site and how to conduct water quality sampling, testing, and reporting.

Active Treatment System Operator (If Applicable) Company Name Address Telephone # Fax/Email

Knowledgeable in the principles and practices of treatment systems that employs chemical coagulation, chemical flocculation or electrocoagulation to aid in the treatment of storm water runoff. Familiar with Part 4.5 as a means to implement and comply with the permit.

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 13 of 38

3.0 PROJECT INFORMATION (5.3.3)

This section gathers all relevant site data together to assist with filing for permit coverage.

3.1 Project Information

Project Name:

AK NPS KATM 10(4): Rehabilitate Valley of 10,000 Smokes Road, Phase IV Location Address:

Street: Borough or similar government subdivision:

1000 Silver Street, Building 603 Lake and Peninsula Borough City: State: Zip:

King Salmon Alaska 99613 Latitude (decimal degree, 5 places): Longitude (decimal degree, 5 places):

58.54436 -155.78489 Determined By: ☐ GPS ☐ Web Map: Enter Text ☐ USGS Topo Map, Scale: Enter Text ☑ Other: Katmai National Park

3.2 Project Site Specific Conditions (5.3.3)

Instructions:

Briefly describe the existing site conditions, including:

• Mean annual precipitation based on nearest appropriate weather station (5.3.3.1). Precipitation data for Alaska weather-recording stations are available at the Western Regional Climate Center Internet website: https://xmacis.rcc-acis.org/.

• Soils, topography, drainage patterns, approximate growing season, and vegetation.

• Evidence of site contamination.

Mean annual precipitation based on nearest weather stations (inches): 19.49”

Soil Type(s) and Slopes (describe soil type(s) and current slopes; note any changes due to grading or fill activities): The soil profile in the project area displays three distinct strata: 1) an organic horizon composed primarily of fine roots, duff, and moderately decomposed organic matter; 2) a light yellowish-brown ash horizon containing discreet, small to large, yellowish-brown globular concentrations, primarily in the upper 10% of the volcanic ash horizon, and that did not appear to be associated with root channels; and, 3) a very dark grayish-brown sandy loam containing a minor ash fragment component. Slopes within project area include a mix of flat “lowlands” and steep terrain.

No changes anticipated to existing soils/slopes as a result of the Project are anticipated except for the existing Moraine (5-mile) Gravel Pit in which the Project would entail cut-and-fill 1 ½ to 1 slope for the backwall.

Landscape Topography: The Valley of 10,000 Smokes (VTTS) Road is a 22.5-mile road in Katmai on the northern Alaska Peninsula unconnected to any roads located outside of the Brooks Camp area. Katmai’s landscape includes two physiographic provinces - the Aleutian Range and the Nushagak-Bristol Bay Lowlands.

Drainage Patterns (describe current drainage patterns and note any changes due to grading or fill activities):

Overland flow within existing gravel areas (VTTS Road, Moraine Pit) to vegetated surroundings, no changes to drainage patterns anticipated as a result of the Project.

Approximate Growing Season: May to September

Type of Existing Vegetation: The VTTS Road traverses a forest dominated by white spruce (Picea glauca) with smaller amounts of Alaska birch (Betula neoalaskana), grayleaf willow (Salix glauca), Bebb’s willow (Salix https://xmacis.rcc-acis.org/

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 14 of 38 bebbiana), Barclay’s willow (Salix barclayi), diamondleaf willow(Salix plantifolia), Sitka alder (Alnus viridus ssp.

sinuata), and balsam poplar (Populus balsamifera). The ground cover is a thick moss layer with crowberry (Empetrum nigrum), and sometimes mountain cranberry (Vaccinium vitus-idaea), growing on top of the moss.

Spirea spp. branches grow up through the moss. Forest openings have thinner moss layers, more lichens (mostly Cladonia and Cetraria spp.), and, on moist areas, bluejoint reedgrass (Calamagrostis canadensis).

Historic site contamination evident from existing site features and known past usage of the site: No contamination from existing site features or past usage of the site.

4.0 NATURE OF CONSTRUCTION ACTIVITY (5.3.4)

4.1 Scope of Work

Describe the general scope of work for the project, major phases of construction, etc.

• Two seasons: May 2023 – October 2023 and May 2024 – October 2024. Each season will generally follow the below phases:

o mobilization and erosion control o procure rock/crush aggregate from existing, on-site, National Park Service (NPS) Moraine Pit for project requirements and future NPS maintenance needs o install four drainage blankets along the Valley of 10,000 Smokes Road (100’ to 500’ long for three of the blankets, approximately 3,100’ long for the fourth). The drainage blankets would be constructed within low-lying road sections underneath the roadway prism to allow for water to exist and flow under the roadway through an assembled slate of materials which contain numerous empty spaces that could be filled by the presence of water o re-adjust a section of the road for ~150’ w/in existing roadway prism o improve existing vehicle pullouts (by re-graveling) o improve drainage by replacing damaged culverts and re-establishing ditches

Replace nine existing culverts, seven of which would remain the same length and width as the existing culvert. One culvert would be widened from 6 inches to 18 inches but remain the same length. One culvert would be lengthened 10 additional feet but remain the same width o demobilization and removal of temporary sediment/erosion control items after final stabilization has been reached

4.2 Project Function (5.3.4.1)

Briefly describe the function of the construction activity (e.g., low-density residential, shopping mall, subdivision, airport, highway, etc.).

The project need/function is to upgrade the VTTS Road (cyclic road maintenance) as necessary to support vehicle traffic.

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 15 of 38

4.3 Support Activities (As Applicable)

Support activities for this project are: Please see Table below and also TBD by Contractor

Support Activity Location Dedicated

Yes No

Concrete Batch Plant ☐ Asphalt Batch Plant ☐ Equipment Staging Yards TBD by Contractor ☐ Material Storage Areas Moraine (5-mile) Gravel Pit, 18.5-mile Pit ☐ Excavated Material Disposal Areas ☐ Borrow Areas Moraine (5-mile) Gravel Pit ☐

4.4 Sequence and Timing of Soil-disturbing Activities (5.3.4.2) Briefly describe the intended sequence and timing of activities that disturb soils at the site.

• Two seasons: May 2023 – October 2023 and May 2024 – October 2024:

o procure rock/crush aggregate from existing, on-site, National Park Service (NPS) 5-mile gravel pit for project requirements and future NPS maintenance needs; stockpile gravel within existing gravel pits (5-mile and 18.5-mile) for continuous maintenance use o install four drainage blankets along the Valley of 10,000 Smokes Road (100’ to 500’ long for three of the blankets, approximately 3,100’ long for the fourth). The drainage blankets would be constructed within low-lying road sections underneath the roadway prism o re-adjust a section of the road for ~150’ w/in existing roadway prism o improve drainage by replacing damaged culverts and re-establishing ditches

4.5 Size of property and total area expected to be disturbed (5.3.4.3)

• Estimate the area to be disturbed by excavation, grading, or other construction activities, including support activities described in CGP Section 1.4.2.3 (e.g., concrete or asphalt batch plants, equipment staging yards, material storage areas, excavated material disposal areas, and/or borrow areas).

• Calculate the percentage of impervious surface area before and after construction.

• Calculate the run-off coefficients before and after construction.

The following are estimates of the construction site:

Total Project Area: ................................................................. ~4 acres

Construction-site area to be disturbed: ................................ 2.6 acres

Percentage impervious area BEFORE construction: .............. 0 %

Runoff coefficient BEFORE construction: .............................. N/A

No impervious surfaces before or after construction; no change in surface materials – gravel to gravel

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 16 of 38

Percentage impervious area AFTER construction: ................ 0 %

Runoff coefficient AFTER construction:................................. N/A

4.6 Identification of All Potential Pollutant Sources (5.3.4.5)

• Identify and list all potential sources of sediment from construction materials and activities which may affect the quality of storm water discharges from the construction site.

• Identify and list all potential sources of pollution, other than sediment, from construction materials and activities which may affect the quality of storm water discharges from the construction site.

Potential sources of sediment to storm water runoff: Please see Table below

Se le ct ed

A ct iv ity

(X

Construction Activity

Potential Construction Site Pollutants

Se di m en t

N ut rie nt s

Ba ct er ia pH

O il

G re as e

Tr as h

D eb ris

Pe st ic id es

He av y M et al s

O th er

Po llu ta nt s

Clearing, excavating, and grading X X

Fill of roadway embankment, backfill at structures X X

Vehicle/equipment fueling and maintenance X X X

Vehicle/equipment use and storage X X

Sanitary/septic waste X X

Dewatering operations X X

Drilling and blasting operations X X X

Concrete washout and waste X X

Structure construction/painting/cleaning X X X X

Demolition and debris disposal X X X X X

Solid waste (trash and debris) X X

Hazardous waste or contaminated spills X X X

Paving operations X X

Landscaping operations X X X

Mining, rock extraction, crushing X X X

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 17 of 38

Potential pollutants and sources, other than sediment, to storm water runoff:

Please see Table above and also TBD by Contractor

Trade Name Material Storm Water Pollutants Location

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 18 of 38

5.0 SITE MAPS (5.3.5)

The SWPPP must include a legible site map (or set of maps for large projects) showing the entire site and identifying the following site-specific information:

• North arrow and bar scale

• Property boundaries

• Locations where earth-disturbing activities will occur, noting phasing

• Location of areas that will not be disturbed and natural features to be preserved

• Location of all storm water conveyances including ditches, pipes, and swales

• Locations of storm water inlets and outfalls, with a unique identification code for each outfall

• Locations where storm water and/or authorized non-storm water discharges to waters of the U.S.

(including wetlands) or a Municipal Separate Storm Sewer System (MS4).

• Direction of storm water flow and approximate slopes anticipated after grading activities

• Locations where control measures will be or have been installed

• Locations where exposed soils will be or have been stabilized

• Locations where post-construction storm water controls will be or have been installed

• Locations of support activities

• Locations where authorized non-storm water will be used

• Locations and sources of run-on to the site from adjacent property that may contain quantities of pollutants which could be exposed to precipitation.

• Locations of all waters of the U.S. on-site (including significant wetland areas ≥10,000 ft2) and those within 2,500 feet of the site boundary

• Location of existing public water system (PWS) drinking water protection areas (DWPA) for PWS sources (e.g., springs, wells, or surface water intakes) that intersect the boundary of the project area.

(The DWPAs can be found using the interactive web map application, “Alaska DEC Drinking Water Protection Areas” located at http://dec.alaska.gov/das/GIS/apps.htm.)

• Sampling point(s), if applicable

• Areas where final stabilization has been accomplished

• Staging and material storage areas (construction materials, hazardous materials, fuels, etc.)

• Dumpsters

• Porta-potties

• Concrete, paint, or stucco washout areas

• Stabilized construction exits

Include a general location map in Tab 5 of this SWPPP. (5.3.4.4)

Include site maps in Tab 5 of this SWPPP. (5.3.5)

6.0 DISCHARGES

Subject to compliance with the terms and conditions of the CGP, the permittee is authorized to discharge pollutants in storm water discharges from the site. If the permittee is eligible for coverage under this permit and does not comply with the requirements of this general permit, the permittee may be in violation of this general permit for otherwise eligible discharges.

Instructions:

• Describe and identify the location of any storm water discharge associated with support activities, including discharges from dedicated asphalt and concrete plants covered by this permit (5.3.8).

• Identify all allowable sources of non-storm water discharges to be used at the site (5.3.9).

http://dec.alaska.gov/das/GIS/apps.htm

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 19 of 38

6.1 Locations of Other Industrial Storm Water Discharges (5.3.8) N/A

6.2 Allowable Non-Storm Water Discharges (1.4.3; 4.3.7; 5.3.9) Water used to control dust (as needed). Also, TBD by Contractor.

7.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO

TOTAL MAXIMUM DAILY LOADS (3.2, 5.6)

If the permittee is discharging into a water body with an EPA-established or approved Total Maximum Daily Load (TMDL), the permittee must implement measures to ensure the discharge of pollutants from the site is consistent with the assumptions and requirements of the TMDL. Refer to the CGP for additional requirements.

The SWPPP must include documentation supporting a determination of permit eligibility with regard to waters that have a TMDL.

7.1 Identify Receiving Waters (5.3.3.3)

Instructions:

• List any water bodies that would receive storm water from the site, including rivers, streams, lakes, coastal waters, and wetlands. Describe each as clearly as possible (e.g., Noyes Slough, a tributary to the Chena River, etc.).

• Indicate location of all water bodies on site map.

• Note any stream crossings, if applicable.

• List storm sewer and/or drainage systems into which storm water from the site could discharge and water body(ies) the system(s) ultimately discharge to.

Description of receiving waters: Three low water crossings exist along the VTTS Road. The first 2 cross unnamed tributaries to Margot Creek, while the third crosses the Margot Creek main drainage. These crossings occur upriver of anadromous fish spawning habitat due to the presence of Margot Falls which serves as a physical barrier to migrating salmonids.

The VTTS Road also crosses through previously identified low lying wetland areas located at mile markers 3.9, 5.3, 5.9, and 12.8. The roadway in these areas will be raised onto a drainage blanket structure allowing for the passage of waters to flow beneath the road.

Also, drainage within the Park will be improved by replacing damaged culverts and re-establishing ditches within small, unnamed tributaries and ditches within the Margot Creek watershed.

Description of storm sewer and/or drainage systems: N/A

Other: None

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 20 of 38

7.2 Identify TMDLs (5.6.1)

Determine whether the project may discharge into a water body with an EPA-established or approved Total Maximum Load (TMDL) for turbidity or sediment.

Instructions:

• See ADEC web site for a listing of impaired water bodies: http://dec.alaska.gov/water/water-quality/impaired-waters.

• Look through all impaired water body categories -- 4a, 4b, and 5.

Is an EPA-established or approved TMDL published for the receiving water(s) listed in Section 7.1? Yes No.

If YES, list the TMDL(s) here. Include a summary of consultations with state or federal TMDL authorities.

Include correspondence or other supporting documentation in Tab 11.

TMDL: N/A

Summary of consultation with state or federal TMDL authorities (5.6.2): N/A

Measures taken to ensure compliance with TMDL (5.6.3): N/A

8.0 DOCUMENTATION OF PERMIT ELIGIBILITY RELATED TO

ENDANGERED SPECIES (3.3, 5.7)

The SWPPP must include documentation supporting a determination of permit compliance with regard to the Endangered Species Act.

Instructions:

• Determine whether endangered or threatened species or their critical habitats are on or near your site.

• Attach any correspondence for any stage of the project planning between the USFWS, EPA, National Marine Fisheries Service (NMFS), or others and the permittee regarding listed species and critical habitat, including any notification that delays the permittee’s authorization to discharge under this permit (Tab 16).

8.1 Information on Endangered or Threatened Species or Critical Habitat (5.7.1)

Are endangered or threatened species and critical habitats on or near the project area? Yes No.

Describe how this determination was made:

o Anchorage Fish And Wildlife Conservation Office (02/02/21) o USFWS Information for Planning and Consultation (IPaC) (11/01/21) o Confirmation by Park on 1/09/23 http://dec.alaska.gov/water/water-quality/impaired-waters http://dec.alaska.gov/water/water-quality/impaired-waters

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 21 of 38

Will species or habitat be adversely affected by storm water discharge? Yes No.

Describe the species and/or critical habitat, if species or habitat will be affected by storm water discharge.

No listed species or critical habitats present.

Include any agency correspondence in the SWPPP (5.7.4).

Provide summary of necessary measures (5.7.5): N/A – no listed species or critical habitats present.

9.0 APPLICABLE FEDERAL, STATE, TRIBAL, OR LOCAL

REQUIREMENTS (4.15)

A permittee must ensure storm water control measures implemented at the site are consistent with all applicable federal, state, tribal, or local requirements for soil and erosion control and storm water management.

Instructions:

Describe applicable federal, state, tribal, or local requirements, if any.

SHPO 106 Concurrence – (10/01/21) o Confirmation by Park on 1/09/23

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 22 of 38

Control Measures Instructions:

Describe the Best Management Practices (BMPs) to be implemented to control pollutants in storm water discharges. For each major activity identified:

• Clearly describe appropriate control measures.

• Describe general sequence during the construction process in which the measures will be implemented.

• Describe maintenance and inspection procedures to be undertaken for that specific BMP.

• Include protocols, thresholds, and schedules for cleaning, repairing, and/or replacing damaged or failing BMPs.

• Identify staff responsible for maintaining BMPs. (If your SWPPP is shared by multiple operators, indicate the operator responsible for each BMP.)

Categorize each BMP under one of the following areas of BMP activity as described below:

1. Minimize disturbed area (preserve native topsoil, phase construction activities) (4.2.2)

2. Maintain natural buffer areas (4.2.3)

3. Control storm water discharges and flow rates (4.2.5)

4. Protect steep slopes (4.2.6)

5. Storm drain inlet protection measures (4.3.1)

6. Water body protection measures (4.3.2)

7. Down-slope sediment controls (4.3.3)

8. Stabilized construction vehicle access and exit points (4.3.4)

9. Dust generation and track-out from vehicles (4.3.5, 4.3.6)

10. Stockpile Management (4.3.7)

11. Authorized Non-Storm Water Discharges (4.3.8)

12. Sediment basins (4.3.9)

13. Dewatering (4.4)

14. Soil stabilization (4.5)

15. Treatment chemicals/Active treatment Systems (4.6)

16. Good housekeeping measures (4.8)

17. Any additional BMPs

• Note the location of each BMP on your site map(s).

• Any structural BMPs should have design specifications and details referred to in Tab 6.

• For more information or ideas on BMPs, see the ADEC Alaska Storm Water Guide:

http://dec.alaska.gov/water/wastewater/stormwater/guidance/

10.0 CONTROL MEASURES/BEST MANAGEMENT PRACTICES (4.0; 5.3.6)

Use this section to describe the types and locations of control measures and BMPs to be installed and maintained in accordance with Section 4.0 of the CGP.

Describe each control measure and BMP, including installation schedule and maintenance, inspection, and removal requirements. You may include a brief description of each BMP in this section and refer to detailed installation, maintenance, inspection, removal requirements, and manufacturer’s specifications to be included in this narrative (standard drawings are included in Tab 6).

If a control measure or BMP will be used to comply with more than one element of this section, you do not need to repeat the detailed installation, maintenance, inspection, removal requirements, and manufacturer’s http://dec.alaska.gov/water/wastewater/stormwater/guidance/

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 23 of 38 information. For each element, identify the control measure or BMP to be used, and refer to the section or Tab 6 where the detailed information is presented.

The person(s) identified in Section 2.0 of this SWPPP will be responsible for ensuring compliance with the installation, maintenance, inspection, and removal of these control measures.

10.1 Minimize Amount of Soil Exposed During Construction Activity (4.2.2) Instructions:

Describe the areas that will be disturbed with each phase of construction and methods (signs, fences, etc.)

you will use to protect those areas that should not be disturbed.

Describe natural features identified and how each will be protected during construction activity.

Describe how topsoil will be preserved.

Control measures at the construction site are selected, installed, implemented, and maintained to minimize pollutants in the discharge as necessary to meet applicable water quality standards. Perimeter controls will be installed before ground disturbing activities are initiated. The two areas of ground disturbance are listed below:

• Moraine (5-mile) Gravel Pit - perimeter controls (silt fence) will be installed within the gravel pit and associated stockpiles

• Raised roadway onto a drainage blankets – perimeter controls (fiber rolls) will be installed at raised locations o Topsoil stripped will be conserved and reused

• Culverts - perimeter controls (fiber rolls) will be installed at culvert locations o Topsoil stripped from the culvert locations will be conserved and reused

10.2 Maintain Natural Buffer Areas (4.2.3)

Are stream crossings or waters of the U.S. located within or immediately adjacent to the property? Yes No.

If YES, describe the control measures to be implemented to comply with the CGP Section 4.2.3 (e.g., buffer areas, perimeter controls, etc.)

The Project will maintain natural buffer areas at stream crossings and around the edge of any waters of the U.S.

that are located within or immediately adjacent to the construction activity in accordance with the following:

• The buffer must be a minimum of 25 feet wide, or the width as required by local ordinance, unless infeasible based on site dimensions

• To the extent practicable, use perimeter controls adjacent to buffers and direct storm water sheet flow to buffer areas to increase sediment removal and maximize storm water infiltration

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 24 of 38

10.3 Control Storm Water Discharges and Flow Rates (4.2.5)

Instructions:

Describe control measures to comply with the CGP (e.g., divert storm water around the site, slow down or contain storm water, use of velocity dissipation devices, installing permanent storm water management controls prior to construction of site improvements to the extent practicable, etc.).

BMP Description:

• Gravel Pit - silt fence to divert, slow down, and contain sediment

• Culverts - inlet/outlet dissipation measures at applicable culverts (fiber rolls). Also, diversions, gravity bypass pipe, where applicable

Installation Schedule: May - prior to ground disturbance

Maintenance and Inspection:

• Periodic inspections in accordance with CGP to ensure there is no overtopping, rilling, or other erosive conditions o Inspections will be conducted by qualified personnel

Responsible Staff: PE Repeat as needed.

10.3.1 Protect Steep Slopes (4.2.6)

Will steep slopes be present at the site during construction? Yes No.

If YES, describe control measures to be implemented to comply with CGP Section 4.2.6 (e.g., reduce continuous slope length, divert storm water around slopes, stabilized exposed areas, etc.).

BMP Description: Moraine (5-mile) Pit - silt fence, fiber rolls (as needed).

Design and construct cut-and-fill 1 ½ to 1 slope for backwall and install BMPs surrounding downslope areas/perimeter in a manner that will minimize erosion.

Installation Schedule: May, prior to ground disturbance.

Maintenance and Inspection: Periodic inspections in accordance with CGP to ensure there is no overtopping, rilling, or other erosive conditions.

Responsible Staff: PE Repeat as needed.

10.4 Storm Water Inlet Protection Measures (4.3.1)

Instructions:

Describe control measures (e.g., filter berms, perimeter controls, temporary diversion dikes, etc.) to be implemented to protect all inlets receiving storm water from the project during the duration of the project.

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 25 of 38

BMP Description: N/A – no stormwater inlets located within project area or downstream of the project area.

Installation Schedule: N/A

Maintenance and Inspection: N/A

Responsible Staff: N/A Repeat as needed.

10.5 Water Body Protection Measures (4.3.2)

Instructions:

Describe control measures selected to minimize discharge of sediment prior to entry into water bodies located on or immediately downstream of the site.

BMP Description: Fiber rolls

Installation Schedule: May, installation prior to ground disturbance.

Maintenance and Inspection: Periodic inspections in accordance with CGP to ensure there is no overtopping, rilling, or other erosive conditions.

Responsible Staff: PE Repeat as needed.

10.6 Down-Slope Sediment Controls (4.3.3)

Instructions:

Describe sediment controls (e.g., silt fence or temporary diversion dike) for any portion of the down-slope perimeter where storm water will be discharged from disturbed areas of the site.

BMP Description: Silt fence, fiber rolls, and temporary gravity bypass pipes - where applicable for culvert replacement depending on flow conditions/weather forecasts at time of replacement and culvert location.

Installation Schedule: May, installation prior to ground disturbance.

Maintenance and Inspection: Periodic inspections in accordance with CGP to ensure there is no overtopping, rilling, or other erosive conditions.

Responsible Staff: PE Repeat as needed.

10.7 Stabilized Construction Vehicle Access and Exit Points (4.3.4) Describe location(s) of vehicle entrance(s) and exit(s), procedures to remove accumulated sediment off-site (i.e., vehicle tracking), and stabilization practices (i.e., stone pads and/or wash racks) to minimize off-site vehicle tracking of sediments and discharges to storm water.

BMP Description: N/A

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 26 of 38

Contractor is to remove dirt, plant, and foreign material from vehicles and equipment before entry into Katmai National Park.

Installation Schedule: N/A

Maintenance and Inspection: N/A

Responsible Staff: N/A Repeat as needed.

10.8 Dust Generation and Track-Out from Vehicles (4.3.5 and 4.3.6) Describe control measures to minimize the generation of dust and off-site vehicle tracking of sediment.

BMP Description: Application of water for dust control (as needed); no off-site vehicle tracking of sediment (entire site is gravel).

Installation Schedule: During active construction as needed.

Maintenance and Inspection: Periodic inspections in accordance with CGP to ensure no sediment laden water exits construction areas.

Responsible Staff: PE Repeat as needed.

10.9 Soil Management (4.3.7)

Will soil stockpiles be at the site during construction? Yes No.

If YES, describe control measures intended to control sediment loss from the stockpiles (e.g., tarps or perimeter straw wattles). Show location(s) of stockpile(s) on site maps.

BMP Description: Gravel stockpiles will be placed within existing/established gravel pits located away from storm water inlets, water bodies, conveyance channels, etc. The stockpiles will be in continuous use by the Park.

Perimeter of the stockpiles will have the following BMPs during the Project: silt fence and/or fiber rolls as necessary.

Installation Schedule: May, prior to ground disturbing activities and as Project advances.

Maintenance and Inspection: Periodic inspections in accordance with CGP to ensure there is no overtopping, rilling, or other erosive conditions.

Responsible Staff: PE and Derick Derby (NPS) Repeat as needed.

10.10 Authorized Non-Storm Water Discharges (4.3.8)

Describe any measures taken to minimize any non-storm water authorized by this permit.

TBD by Contractor

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 27 of 38

10.11 Sediment Basins (4.3.9)

Refer to CGP Section 4.3.9 to determine if a sediment basin is required for your site.

Will a sediment basin be required during construction? Yes, No.

If YES, provide a brief description of the sediment basin here. Append detailed design information in Tab 6 (e.g., calculated volume of runoff from a two-year, 24-hour storm, or other assumptions used to calculate appropriate sediment-basin size). Show location of sediment basin(s) on site maps.

N/A

10.12 Dewatering (4.4)

Describe dewatering practices to be implemented if water must be removed from an area so construction activity can continue.

Will dewatering be conducted during construction? Yes, No.

Will excavation dewatering be conducted within 1,500 feet of a DEC mapped contaminated site found on the following website? Yes, No.http://www.arcgis.com/home/item.html?id=315240bfbaf84aa0b8272ad1cef3cad3

If yes to above question, review and comply with the DEC Excavation Dewatering General Permit (AKG002000 http://dec.alaska.gov/water/wastewater/stormwater/dewater-hydrostatic/#dewater) or most current version, for specific requirements.

Describe control measures to be implemented to comply with dewatering discharges authorized either under the CGP or the DEC Excavation Dewatering general permit requirements.

BMP Description: N/A

Installation Schedule: N/A

Maintenance and Inspection: N/A

Responsible Staff: N/A

Repeat as needed.

10.13 Soil Stabilization (4.5, 5.3.6.3)

A permittee must stabilize all disturbed areas of the site to minimize on-site erosion and sedimentation and the resulting discharge of pollutants.

Soil stabilization requirements vary depending on the mean annual precipitation for the site. Refer to CGP Section 4.5 for specific requirements.

Deadline to Initiate Stabilization. Stabilization of disturbed areas must, at a minimum, be initiated immediately whenever any clearing, grading, excavating, or other earth disturbing activities have permanently ceased on any portion of the site or temporarily ceased on any portion of the site and will not resume for a period exceeding:

http://www.arcgis.com/home/item.html?id=315240bfbaf84aa0b8272ad1cef3cad3 http://dec.alaska.gov/water/wastewater/stormwater/dewater-hydrostatic/#dewater

𝐷𝐷𝐷𝐷𝐷𝐷 𝐷𝐷𝐶𝐶𝐶𝐶 𝑆𝑆𝑆𝑆𝐶𝐶𝐶𝐶𝐶𝐶 𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇𝑇,𝑉𝑉𝑇𝑇𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉𝑉 1.0, 𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽𝑇𝑇𝑉𝑉𝐽𝐽 20, 2021 (Katmai-swppp-Narrative.docx) Page 28 of 38

• Seven (7) calendar days for those areas of the state with a mean annual precipitation of forty (40) inches or greater; or

• Fourteen (14) calendar days for those areas of the state with a mean annual precipitation less than forty (40) inches.

Note: In the context of this provision, “immediately” means no later than the end of the next work day, following the day when the earth-disturbing activities have temporarily or permanently ceased.

Deadline to Complete Temporary Stabilization Activities. As soon as practicable, but no later than 14 calendar days after the initiation of soil stabilization measures consistent with Part 4.5.1.1, the following are required to be completed:

• For vegetative stabilization, all activities necessary to initially seed or plant the area to be stabilized; and/or

• For non-vegetative stabilization, the installation or application of all such non-vegetative measures.

Instructions:

Refer to the Alaska Plant Materials Center’s A Revegetation Manual for Alaska and Coastal Revegetation & Erosion Control Guide…