SWPPP_WA_FS_ERFO_2016(1)-22(2).pdf

Stormwater Pollution Prevention Plan

SWPPP

For:

Cowlitz Valley Road Repairs, Phase 2

WAFS ERFO 2016(1)-22(2)

Skamania, Washington

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer:----------

General Contractor: ---------

Table of Contents

SWPPP/F.SCP TABS

TAB 1: SWPPP/ESCP Narrative

TAB 2: NPDES Permit (Construction General Permit or Corresponding State Permit)

TAB 3: NOI, EPA/State Acknowledgement, Other Applicable EPA/State Correspondence

TAB 4: Delegation of Authority

TAB 5: Maps

TAB 6: Erosion/Sediment Control Plan Sheets (plan set and BMP typical details)

TAB 7: Permanent Stabilization and Revegetation Plan (plan sets and details)

TAB 8: SWPPP Amendment Log

TAB 9: Erosion/Sediment Control Inspection Reports and Requirements

TAB 10: Corrective Action Log

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

TAB 12: Training Log

TAB 13: Waste and/or Borrow Site Information

TAB 14: Grading and Stabilization ,Log

TAB 15: Hazardous Spill Plan

TAB 16: Other Applicable Permits(§ 404, § 401, Oregon Remove-Fill Permit)

TAB 17: NPDES Quality Assurance Checklist

TAB 18: NPDES Notice of Termination (NOT)

Tab 1

't~mlfllililli

Complete SWPPP narrative in accordance with contract 107.0lA(b).

Revise SWPPP narrative as needed throughout construction in accordance with contract 107.0lA(f)

ALASKA, IDAHO AND W~Bilflz'it(l!f PROJECTS ONLY:

.. ' /': .. ,,:, <cc,/ .. ··;~> .. ;;:<:~,:/'§;'

SWPPP narrative must be signed by General Contractor's responsible corporate officer as defined in CGP 1.11.2.

File approved SWPPP narrative in Tab 1.

Prevention Plan (SWPPP)

For Construction Activities at:

Project Name:

Project Site Location:

City, County, State, Zip Code:

SWPPP Prepared for:

Organization Name:

Address:

Telephone Number:

SWPPP Prepared by:

Name, Title:

Company/Organization:

Address:

Telephone Number:

Cowlitz Valley Road Repairs, Phase 2

WA_FS_ERF0_2016(1)-22(2)

Gifford Pinchot National Forest, SITES: 2324 MP 0.6, 2325 MP

3.5, 2500 MP 25.0, 2900 MP 7.6, 2900 MP 9.3, 2900 MP 10.2,

2900 MP 10.4, 5400 MP 26.9, 9000 MP 11.5, and 9000 MP 45.0

Skamania, Washington, 98377

FHW A, Western F eder~l Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7700

Melissa Hogan, Environmental Protection Specialist

FHWA, Western Federal Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7735

SWPPP Preparation Date: 4/9/2018

Estimated Construction Start Date: 06/15/2018

Estimated Construction Completion Date: 12/03/2019

Estimated Revegetation Start Date: 9/30/2018

Estimated Revegetation Completion Date: 11/15/2020

TAB 1:

TAB2:

TAB3:

TAB4:

TABS:

TAB6:

TAB7:

TABS:

TAB9:

TAB 10:

TAB 11:

TAB 12:

TAB 13:

TAB 14:

TAB 15:

TAB 16:

TAB 17:

TAB 18:

SWPPP TABs (SWPPP Inclusions)

SWPPP/ESCP Narrative

NPDES Permit (Construction General Permit or Corresponding State Permit)

NOI, EPA/State Acknowledgement, Other Applicable EPA/State Correspondence

Delegation of Authority

Maps

Erosion/Sediment Control Plan Sheets (plan set and BMP typical details)

Revegetation Plan (if applicable)

SWPPP Amendment Log

Inspection Reports

Corrective Action Log

Water Quality Monitoring, Reporting Requirements, and Reports (if applicable)

Training/Certification Log

Government-Selected Waste, Borrow, Staging Sites

Grading and Stabilization Log

Hazardous Spill Plan or SPCC

Threatened and Endangered Species and Historic Preservation (Section 106) Documentation

NPDES Quality Assurance Checklist

NPDES Notice of Termination (NOT)

1:

SWPPP/ESCP NARRATIVE

Table of Contents

STORMW ATER POLLUTION PREVENTION PLAN (SWPPP)

SECTION 1: RESPONSIBLE PARTIES/CONTACT INFORMATION •..•.•..••••••..••••.....••...• 1

1.1 Operator(s):

1.2 Construction Site SWPPP Contact(s):

1.3 SWPPP Prepared by:

1.4 NPDES Stormwater Permit

1.5 SWPPP Administrator

1.6 Permitting Authority for FHW A/WFLHD Projects

SECTION 2: PROJECT INFORMATION

2.1 Project Name and Location

2.2 Project Site Characteristics

SECTION 3: NATURE OF CONSTRUCTION ACTIVITY ..•••••••..••..•.•.•.•••.....................•

3.1 General Description of Project and Scope of Work: (i.e. highway construction, roadway realignment, highway and bridge reconstruction, etc.) is described below:

3.2 Sequence and Estimated Dates of Construction Activities

3.3 Potential Sources of Pollutants

SECTION 4: SITE MAPS

SECTION 5: DISCHARGES

5.1 Allowable Non-Stormwater Discharges

5.2 Receiving Waters:

5.3 Water Quality Monitoring Requirements

SECTION 6: COMPLIANCE WITH OTHER APPLICABLE REQUIREMENTS

6.1 Endangered Species Protection

6.2 Historic Preservation

6.3 Safe Drinking Water Act Underground Injection Control Requirements

SECTION 7: EROSION AND SEDIMENT CONTROLS

7.1 Natural Buffers or Equivalent Sediment Controls (Required for EPA CGP states only - ID, WA)22

[i]

7.2

7.3

7.4

7.5

7.6

7.7

7.8

7.9

Perimeter Controls ...................................................•.......•.....•...........................•...•.•.••.........•....•. 23

Sediment Track-Out ...•.......•.................•....•..•.............•......•...................................•....••....•.•

Stockpiled Soil or Other Erodible Materials

Minimize Dust ..............•...•.......•...•.•.•................................•..................•.......•........................•

Minimize Disturbance of Steep Slopes ......•........•.........•.•...•.....•.......................•........•

Topsoil Conservation .................•.•.....•..................................•..........•

Minimize Soil Compaction ...................•......•................................•.........•.•.•.•

Storm Drain Inlets and Culvert lnlets

7.10 Constructed Stormwater Conveyance Channels and Culvert Outlets

7.11 Sediment Basins ........•...•...............•.............................................•.•...................•.............•

7 .12 Chemical Treatment .......................•..........•................•..................................•..........•.•

7.13 Dewatering Practices ...•.................................•.•..............•.•.•....•.•..................................••.....••

7.14 Erosion Control and Stabilization .....•....•.•........•..............•...................•.....•.......•......•

7.15· Removal of BMPs •......•.................................•...•..•...............•

7.16 Post Construction Measures .......•.....•...•....•....•......................................................•

SECTION 8: OPERATIONAL CONTROLS/GOOD HOUSEKEEPING MEASURES

8.1

8.2

8.3

8.4

8.5

8.6

Hazardous Spill Plan ...........................•.•...•.......•.•.•.•.•.....•..........•.............•..............•..•.•

Spills/Releases in Excess of Reportable Quantities

EquipmentNehicle Fueling and Maintenance Practices

EquipmentN ehicle Washing ....................•.••.•.•...............•..............................•.•..........•......•

Material Handling and Waste Management

Designate Concrete Washout Areas

SECTION 9: INSPECTIONS ......••....•••.•.••.•.•.•..•.....•...•.•.....•...........•....•.....••..•..•••••.••.•

9.1 Inspection Frequency ..........•.......•.•.•.....•..•....................•...............•..•...•.•..•...•.•.•......................•... 36

9.2 Corrective Actions .....................•..................................................•.•.....••.•.....•.•.•........................•. 37

SECTION 10: DELEGATIONS OF AUTHORITY

SECTION 11: STAFF TRAINING ............... ~ ...•.....•...........•.•.••••.•..•....•........................•..••••

SECTION 12: CERTIFICATION AND NOTIFICATION

[ii]

Section 1: Responsible Parties/Contact Information

1.1 Operator(s):

Organization Name:

Address:

Telephone Number:

Contractor and PE

FHWA, Western Federal Lands Highway Division (WFLHD) 610 East Fifth Street Vancouver, WA 98661-3801 360-619-7735

Note: Fill in all incomplete information following contract award date and prior to start of construction

(AK, ID, WA projects only) General Contractor Name:

Address:

Telephone Number:

Contractor and PE Note: Fill in all incomplete infonnation following contract award date and prior to start of construction

1.2 Construction Site SWPPP Contact(s):

FHW A Contact Name:

Title:

Address:

Telephone Number:

General Contractor, Company:

(complete for all States) Erosion Control Supervisor Name:

(complete for all States) Address:

Telephone Number:

Project Engineer

1.3 SWPPP Prepared by:

Organization/Company:

Name, Position:

Role/Responsibility Telephone Number:

Email:

Melissa Hogan, Environmental Protection Specialist SWPPP preparer 360-619-7735

· Melissa.j.hogan@dot.gov

1.4 NPDES Stormwater Permit

The Applicable EPA/State NPDES Stormwater Permit is located in TAB 2. The Project NOi and EPA/State Acknowledgement with NPDES Tracking Number is located in TAB 3.

1.5 SWPPP Administrator

The General Contractor (section 1.2) is responsible for maintaining the project SWPPP of Record. The General Contractor will provide a qualified Erosion Control Supervisor, who is responsible for managing the installation, maintenance, inspection, and reporting for erosion and sediment control measures, shall maintain and update the project SWPPP of Record and prepare all documentation required by the project NPDES stormwater permit and SWPPP.

The Erosion Control Supervisor (ECS) is identified in section 1.2 and his/her qualifications are documented in TAB l 2.

The FHW A/WFLHD Project Engineer (PE) is the duly authorized representative of the FHW A for overseeing compliance with the NPDES stormwater permit and SWPPP at the construction site. See Delegation of Authority TAB 4.

All SWPPP documentation, revisions/updates, and reports will be approved/signed by both the General Contractor's ECS and the FHW A PE.

1.6 Permitting Authority for FHW A/WFLHD Projects

Delivery Confirmation documentation of the NOi is located in TAB 3.

The applicable EPA/State NPDES permit is located in TAB 2

Idaho and Washington, Environmental Protection Agency EPA Region 10

Alaska Department of Environmental Conservation (ADEC)

Montana Department of Environmental Quality (MDEO)

Oregon Department of Environmental Quality (ODEQ)

Wyoming Department of Environmental Quality (WDEQ)

State Permittiile: Authoritv Alaska • ADEC is permitting authority for most discharges within the state EXCEPT for:

• EPA is the permitting authority for the Denali National Park and Preserve and Metlakatla Indian Reservation.

Idaho • EPA is permitting authority for discharges within the state .

Montana • MDEQ is permitting authority for most discharges within the state EXCEPT for:

• EPA is the permitting authority for Indian Countrv lands within the state .

Oregon • ODEQ is permitting authority for most discharges within the state EXCEPT for:

• EPA is the permitting authority for Indian Countrv lands within the state .

Washington • WDE is permitting authority for most discharges within the state EXCEPT for:

• EPA is permitting authority for Federal Operators and Indian Country lands within the state

Wyoming • WDEQ is permitting authority for most discharges within the state EXCEPT for:

• EPA is the permitting authority for Indian Country lands within the state

[2]

The NOI for Alaska projects (through the ADEC) can be filed electronically at Alaska Pollutant Discharge Elimination System Program website. The completed SWPPP will be submitted to either ADEC or the Municipality based on the project type and operator described in the ADEC CGP.

The NOI for projects in Idaho, Washington, Denali NP and Metlakatla Indian Reservation can be filed electronically at The EPA website.

The NOI for Montana can be filed through MDEQ following guidance at this website.

Oregon DEQ authorizes FHW AIWFLHD projects under the programmatic 1200-CA permit, (expired in 12/31/2005, administratively extended) ·

The NOI for Wyoming can be filed electronically at this website.

[3]

Section 2: Project Information

2.1 Project Name and Location

This basic site information is used to file for National Pollutant Discharge Elimination System (NPDES) permit coverage. Permit coverage is obtained by filing the Notice of Intent (NOi) after the SWPPP is complete.

Project Name:

Project Site Location:

City, County, State, Zip Code:

Cowlitz Valley Road Repairs, Phase 2

WA_FS_ERF0_2016(1)-22(2)

Gifford Pinchot National Forest, SITES: 2324 MP 0.6, 2325 MP

3.5, 2500 MP 25.0, 2900 MP 7.6, 2900 MP 9.3, 2900 MP 10.2,

2900 MP 10.4, 5400 MP 26.9, 9000 MP 11.5, and 9000 MP 45.0

Skamania County, Washington, 98377

Latitude/Longitude and Section, Township, Range for each site:

2324-0.6: 46°19'0.92"N, 121°44'10.92"W; S30 TlON R9E

2325-3.5: 46°16'30.54"N, 121°43'36.88"W; S8 T9N R9E 2500-25.0: 46°15'46.37"N, 121°57'51.88"W: S17 T9N R7E

2900-7.6: 46°21'44.70"N, 121°47'59.44"W; SlO TlON R8E

2900-9.3: 46°20'48.72"N, 121°47'28.99"W; S15 TlON R8E

2900-10.2: 46°20'5.97"N, 121°47'22.91 "W; S23 TlON R8E

2900-10.4: 46°19'58.67"N, 121°47'19.04"W; S23 Tl ON R8E

9000-45.0: 46°13'58.93"N, 121°38'44.65"W; S25 T9N R9E

9000-11.5: 46° 3'47.28"N, 122° 5'36.59"W; S29 T7N R6E

5400-26.9: 45°55'40.16"N, 122°13'27.69"W; S8 T5N R5E

Lat/Long Source: Google Earth Pro

Is the project located in Indian country? No

Are you applying for permit coverage as a "federal operator?" Y cs

The project Does Not discharge stormwater into a Municipal Separate Storm Sewer System.

2.2 Project Site Characteristics

The undeveloped site and features of the land that are incorporated into the final soil Erosion and Sediment Control plan sheets (TAB 6), as well as natural resources that should be protected are described below:

[4]

Vegetation, trees, and sensitive areas, such as stream buffers, wetlands, highly erodible soils, and steep slopes at the site include:

The general setting is mountainous and forested, with numerous perennial and intermittent streams dissecting the hillslopes. The primary waterbody in the project

· area depends on the site:

2324-0.6: Unnamed drainage to East Canyon Creek

2325-3.5: Unnamed drainage to Summit Prairie Creek

2500-25.0: No water, saturated soil only

2900-7.6: Camp Creek

2900-9.3: Scamp Creek

2900.:. l 0.2: Sunrise Creek

2900-10.4: Jumbo Creek

9000-45.0: Unnamed drainage to Lewis River

9000-11.5: Unnamed drainage to Swift Reservoir

5400-26.9: Unnamed drainage to Canyon Creek

The upland terrestrial habitat is typical of the Douglas fir (Holodiscus discolor) ocean spray habitat type, described in Natural Vegetation of Oregon and Washington (Franklin and Dryness 1988) which typifies dry forest sites. The overstory is relatively open and dominated by Douglas fir. General cover types present in the action area include mixed conifer forest, riparian areas, disturbed roadside vegetation, and developed roads.

Generally, the understory includes a dense layer of shrubs, vines, and herbaceous species. The shrub layer is dominated by ocean spray, but includes a wide variety of other shrubs and vines: vine maple (Acer circinatum ), beaked hazelnut (Cory/us cornuta), red huckleberry (Vaccinium parvifolium), thimbleberry (Rubus parvifloms), baldhip rose (Rosa gymnocarpa), dull Oregon grape (Mahonia nervosa), salal (Gaultheria shallon), and trailing blackberry (Rubus ursinus).Also present are Oregon ash (Fraxinus latifolia), Oregon white oak; Garry oak (Quercus garryana), Pacific crabapple (Malusfusca), Pacific dogwood (Cornus nuttallii), Pacific willow (Salix lasiandra), red alder (A/nus mbra), Douglas-fir (Pseudotsuga menziesii), madrone; madrona (Arbutus menziesii), black cap raspberry (Rubus leucodermis), snowberry (Symphoricarpos a/bus), and goat's beard (Amncus Sylvester).

Also, see TAB 6

Stormwater currently drains from the site in the following manner, Stormwater presently drains from the site by means of soil infiltration, sheet flow, and concentrated flows into adjacent gullies and ditches.

[5]

Also, see TAB 6

The location of discharge points or areas

Culvert outlets, roadside ditches that drain into adjacent vegetated buffers and/or surface waters.

Also, see TAB 6

The location of all waters, including wetlands, are shown on the site map located in

TABs5 and6.

Critical slopes and slope lengths include:

Locations: WSDOT's Unstable Slopes database shows none within the vicinity.

·Soil type(s) of highly erodible soils and the soils' infiltration capacity are identified as,1

Site-specific AOI yields no results from the USDA Web Soil Survey tool. County specific, project area information is below:

Summary b" Map Unit - Skamania County Area, Washington (WA 760)

Map unit Map unit name symbol

3 Naxing ashy loam, 25 to 45 percent slopes

Naxing gravelly ashy loam, 45 to 65 percent slopes, stony

Ganis ashy silt loam, 7 to 25 percent slopes

Jumpe stony ashy loam, 25 to 45 percent north slopes

Loneridge ashy loam, 25 to 45 percent north slopes, stony

Rubble land-Rock outcrop complex, 10 to

90 percent slopes

Loneridge ashy loam, 45 to 65 percent north slopes, stony

Loneridge ashy loam, 45 to 65 percent slopes, stony

Kafing ashy sandy loam, 30 to 60 percent south slopes

1 Access the Natural Resources Conservation Service Web Soil Survey.

[6]

Rating Acres in Percent of

AOI AOI

5.9 1.7%

47.0 13.9%

0.43 5.7 1.7%

25.0 7.4%

0.28 148.3 43.9%

40.3 11.9%

0.28 22.5 6.6%

0.28 17.0 5.0%

0.2 0.1%

Scotties gravelly ashy sandy loam, sandy

13.9 4.1% substratum, 45 to 75 percent north slopes

Kiper stony ashy sandy loam, 30 to 65

12.3 3.6% percent slopes

Totals for Area of Interest 338.1 100.0%

Any past soil contamination at the site is identified as, Unknown.

The following natural features, including trees, streams, wetlands, slopes and other features to be protected includes:

Also, see TAB 6

Protected Natural Features:

Please refer to section 2.2.

Measures to protect these features:

Project will utilize erosion and sediment control BMPs (see Section 7) to avoid discharging sediment-laden, construction stormwater runoff into the streams. In addition, in-water work will be isolated from actively flowing water to maintain water quality standards.

Mean Annual Precipitation at the Project Site:

2324-0.6: 89 in./yr.

2325-3.5: 99 in./yr.

2500-25.0: 101 in./yr.

2900-7 .6: 92 in./yr.

2900-9.3: 93 in./yr.

2900-10.2: 93 in./yr.

2900-10.4: 93 in./yr.

9000~45.0: 83 in./yr.

9000-11.5: 119 in./yr.

5400-26.9: 129 in./yr.

The frequency, intensity, and duration of rainfall for the project site, which are the principal factors influencing erosion from a construction site, are described as, [7]

The 2-year, 24-hour storm event:2

2324-0.6: - 4.0 in./ day

· 2325-3.5: - 4.0 in./day

2500-25.0: - 4.5 in./day

2900-7.6: -4.0 in./day

2900-9.3: - 4.5 in./day

2900-10.2: - 4.5 in./ day

2900-10.4: - 4.5 in./day

9000-45.0: - 4.5 in./day

9000-11.5: - 5.0 in./day

5400-26.9: - 5.0 in./day

The 10-year, 24-hour storm event:

2324-0.6: - 5.5 in./day

2325-3.5: - 5.5 in./day

2500-25.0: - 5.5 in./day

2900-7.6: - 5.5 in./day

2900-9.3: - 5.5 in./day

2900-10.2: - 5.5 in./day

2900-10.4: - 5.5 in./day

9000-45.0: - 5.5 in./day

9000-11.5: - 7.5 in./day

5400-26.9: - 6.5 in./day

The 25-year, 24-hour storm event:

2324-0.6: - 6.5 in./day

2325-3.5: - 6.5 in./day

2500-25.0: - 7.0 in./day.

2900-7.6: - 6.5 in./day

2900-9.3: - 6.5 in./day

2900-10.2: - 7.0 in./day

2900-10.4: - 7.0 in./day

9000-45.0: - 7.0 in./day

9000-11.5: - 8.0 in./day

. 5400-26.9: - 7 .5 in./ day

2 Precipitation frequency for Western States

(8)

Section 3: Nature of Construction Activity

3.1 General Description of Project and Scope of Work:

(i.e. highway construction, roadway realignment, highway and bridge reconstruction, etc.) is described below:

Road 2324 MP 0.6 Soil erosion and pollution control and vegetation will be established. Logs and debris from upstream of the culvert will be removed while maintaining cascading streambed morphology.

The existing 36" culvert at 25 + 97.94 will be replaced with an 84" diameter pipe culvert spanning 48 feet to ensure passing of Q 100 flows and debris. A precast concrete headwall at the culvert inlet will be installed to prevent future damage and inlet I outlet riprap protection will be installed to prevent scour and backwater erosion. The road embankment will then be rebuilt, and aggregate road surface will be replaced.

Road 2325 MP 3.5 Soil erosion and pollution control and vegetation will be established. At station 43 + 45, the original culverts (one abandoned and one destroyed during rain event) will be removed. A 36" culvert spanning the original culvert length of 140 feet a built to pass Q 100 flows and debris, will be installed. Special rock embankment will be installed between 40 + 60 to 42 + 00 and between 43 + 00 to 43 + 20. The fill slope I shoulder embankment will be recontoured and the road base and aggregate surface will be replaced in kind.

Road 2500 MP 25.0 Soil erosion and pollution control and vegetation will be established around the 160' embankment failure and undermined pavement shoulder. The existing culvert and all of the debris blocking the inlet will be removed, the failed embankment materials subexcavated and the embankment recontoured. A reinforced soil slope will be implemented with the addition of a special rock embankment spillway. A standard underdrain system with a v-ditch will be installed on the north side of the roadway. A new 18" CMP culvert with spillway assembly featuring the existing down drain and class 3 riprap armored outlet, will be installed. The existing concrete barrier will be reset on the south side of the roadway after the damaged asphalt surface has been replaced.

Road 2900 MP 7.6 Soil erosion and pollution control and vegetation will be established. Woody debris and unsuitable material will be removed and placed downstream of the culvert on either bank or within the floodplain and a new roadway embankment will be constructed. Recontouring of the embankment will occur to achieve the desired grade. The existing 72" x 90' pipe culvert will be replaced with a QlOO flow-capable, 90" culvert with riprap headwall and riprap inlet I outlet protection. The road base and surface course aggregate will be replaced.

Rd 2900 MP 9.3 Soil erosion and pollution control and vegetation will be established. Debris will be removed and embankment contours reconstructed in kind. Upstream logs will be removed and placed downstream of the culvert, on either bank, or within the floodplain. The existing 60" pipe will be replaced with two, 72" culverts, capable of passing Q 100 flows, with riprap headwalls and a riprap apron at their shared outlet location. Contours will be shaped to

[9] desired profile and roadway surface will be replaced.

Rd 2900 MP 10.2 Soil erosion and pollution control and vegetation will be established. Debris is to be removed and placed in the downstream floodplain while maintaining cascading streambed morphology. The existing culvert at station 83 + 80 will be replaced with a 96" culvert featuring a riprap headwall and outlet apron, the fill slope I shoulder embankment reconstructed, and aggregate surface replaced.

Rd 2900 MP 10.4 Soil erosion and pollution control and vegetation will be established. Debris will be removed from the existing 84" pipe culvert and placed downstream on either side of the bank or within the floodplain. Slope I shoulder embankment will be reconstructed. An 18'x18', precast concrete box culvert with concrete headwall and wingwall will be installed to create uninhibited aquatic organism passage and meet Q 100 flow volumes. Finally, the project will provide aggregate surface replacement.

Rd 5400 MP 26.9 Soil erosion and pollution control and vegetation will be established. Damaged road fill and the existing 24" culvert at station 99 + 90 will be removed. In place of the old culvert, a 48" culvert featuring a class 4 riprap outlet apron will be installed. Fill will be added and road embankment will be replaced to bring the road to the existing contours. The double lane asphalt surface will be replaced.

Rd 9000 MP 11.5 Soil erosion and pollution control and vegetation will be established. Between stations 130 + 40 and 132 + 00, a rock buttress will be constructed to shore up the failed hillside north of the roadway. The existing drainage culvert at station 130 + 20 will be cleaned in place. The ditch between stations 130 + 00 and 132 + 00 will be reconditioned in its entirety.

Rd9000MP45 Soil erosion and pollution control and vegetation will be established. The western ditch is to be reconditioned between stations 114 + 20 and 146 + 80. The existing 36" culvert will be protected and retained. The eastern embankment between stations 144 + 40 and 145 + 60 will be reconstructed.

The type or function of the project is: Choose an item.

Contractor and PE

Note: Fill in all incomplete information following contract award date and prior to start of construction

Construction Support Activities: If applicable, describe any construction support activities such as dedicated concrete or asphalt batch plants, dedicated aggregate sites, equipment staging yards, material storage areas, borrow, or disposal sites (government-selected sites):

[10]

NOTE: All Contractor-selected sources and support sites are the sole responsibility of the General Contractor. The SWPPP and NPDES permitting for Contractor-selected sites and sources are separate from this documentation (SCR 107.0lA(h)).

Support activities are located on the general vicinity map and/or site map in 5 and 6.

Size of the Construction Project:

(Including all Government-selected support sites such as staging, borrow, waste, access roads, etc.)

Estimated Area

Total project area (within ROW or Construction limits):

Construction site area to be disturbed:

Percent Impervious Area BEFORE Construction: 41 %

Runoff Coefficient BEFORE Construction: 0.60

Percent Impervious Are AFTER Construction: 41 %

Runoff Coefficient AFTER Construction: 0.60

[I I]

Units

4.5 Acres

4.5 Acres

3.

Se qu en ce a nd

E st im at ed D at es o f C on st ru ct io n

A ct iv it ie s

C on tr ac to r an d

P E

N ot e:

F il l in a ll i nc om pl et e in fo rm at io n fo ll ow in g co nt ra ct a w ar d da te a nd p ri or to s ta rt o f c on st ru ct io n

T he i nt en de d co ns tr uc ti on s eq ue nc in g an d ti m in g o f m aj or c on st ru ct io n ac ti vi ti es is d et ai le d he re in cl ud in g th e ph as ed g ra di ng a nd s ta bi li za ti on ac ti vi ti es u se d to m in im iz e ov er al l a m ou nt o f d is tu rb ed s oi l.

P ha se

C on st ru ct io n se qu en ce d es cr ip ti on

D ur at io n o f s eq ue nc e:

B M

P s as so ci at ed w it h t hi s St ab il iz at io n m ea su re s:

se qu en ce

C li ck h er e to e nt er te xt

C li ck h er e to e nt er te xt

C li ck h er e to e nt er te xt

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3.3 Potential Sources of Pollutants

The follow table identifies all potential sources (checked activities in column 1) of sediment and other sources of pollution, which may reasonably be expected to affect the quality of stormwater discharges from the construction site.

Potential Construction Site Pollutants

Construction Activity "' .. .... s ... "' =

... ... = ·;:: " 't:l s ... ·o :s .2:l ~ "' .. ; :a <.> .. .,Q "' ... = .. = 0 rn :z = c.. E-- i:::i =--

Clearing, excavating, and grading x x Fill of roadway embankment, backfill at structures x x Vehicle/equipment fueling and maintenance x x Vehicle/equipment use and storage x Sanitary/septic waste

Dewatering operations x x Drilling and blasting operations x x x Concrete washout and waste x x Structure construction/painting/cleaning

Demolition and debris disposal

Solid waste (trash and debris)

Hazardous waste or contaminated spills

Paving operations x x Landscaping operations x x x Mining, rock extraction, crushing

Contractor and PE

Note: Fill in all incomplete information following contract award date and prior to start of constrnction

Construction and waste material expected to be stored on-site includes:

Material Storage Location

[14] s = .. !! ... = ..::= 0 ='= x x

Section Site

Vicinity maps are located in TAB 5. Site maps and erosion and sediment control plan maps are located in TAB 6.

[15]

Section 5: Discharges

Industrial stormwater discharges associated with industrial activity other than construction at the site (including dedicated asphalt plants and dedicated concrete plants that are covered by this permit) include:

NOTE: An Industrial Activity Multi-Sector General Permit may be required for some activities.

Industrial Activity Stormwater Discharge Multi-Sector General Location Permit Number (if applicable)

I.NIA

5.1 Allowable Non-Stormwater Discharges

Non-stormwater discharges used at the construction sited are identified below, along with control measures used to eliminate or reduce the discharges and BMPs used to prevent stormwater contamination.

Applicable to this Project

(check all that apply)

D

Potential Non-Stormwater Discharges

Waters used to wash vehicles where detergents are not used

[8] Water used to control dust

D Potable water including uncontaminated water line flushings

[8] Construction dewatering (uncontaminated)

[8] Ground water or spring water (uncontaminated)

D Routine external building wash down that does not use detergents

D Pavement wash waters where spills or leaks of toxic or hazardous materials have not occurred (unless all spilled material has been removed) and where detergents are not used

D Foundation or footing drains where flows are not contaminated with process materials such as solvents

D Landscape irrigation

[8] Discharges from emergency fire-fighting activities

D Fire hydrant flushings

D Uncontaminated air conditioning or compressor condensate

Control Measures

NOTE: The likely locations of these discharges are identified on the site map TA13 5 and/or

TAB6

[16]

5.2 Receiving Waters:

Are there any surface waters located within 50 feet of the construction disturbance? Choose an item.

Name(s) of the first surface water that receives stormwater directly from your site and/or from theMS4

2324-0.6: Unnamed drainage to East Canyon Creek (~270 feet away)

5400-26.9: Unnamed drainage to Canyon Creek (~650 feet away)

Impaired Waters/TDMLs:

Answer the following for each surface water listed in Table 1:

Is this surface What pollutant(s) is Has a TMDL Pollutant(s) for which water listed as causing the been there is a TDML "impaired?" impairment? completed?

1. Yes D No [8J Yes D No [8J

Source used to determine whether your project discharges into an impaired water:

Click here to enter text.

Tier 2, 2.5 or 3 Waters Answer the following for each surface water listed in Table 1:

Is this surface water If yes, specify which Tier.

designated as Tier 1,2 or 3?

1. Yes 0No [8J Choose an item.

If applicable, documentation of consultation with State or Federal TMDL authorities on consistency of SWPPP conditions with the approved TMDL is found in TAB 11. The control measures required to ensure that discharge of pollutants from the site are consistent with the assumptions and requirements of the EPA-established or approved TMD L, including any specific waste-load allocations are included in that documentation.

[17)

5.3 Water Quality Monitoring Requirements

Provisions in Permit Conditions of the applicable NPDES stormwater permit, as well as the associated §401 certification or other special conditions, define additional monitoring and reporting requirements. Details about water quality monitoring and reporting requirements applicable to this project are included in TAB 11.

Samples and measurements taken for monitoring will be representative of the monitored activity.

Records of all monitoring information will be retained in TAB 11, including all calibration and maintenance records and all ·original strip chart recordings for continuous monitoring instrumentation.

Records of monitoring information will include:

1. The date, exact place, and time of sampling or measurements;

2. The individual(s) who performed the sampling or measurements;

3. The date(s) analyses were performed

4. The individual(s) who performed the analyses;

5. The analytical techniques or methods used; and

6. The results of such analyses.

[18]

Section 6: Compliance Other Applicable Requirements

6.1 Endangered Species Protection

Under which criterion is project eligible for Endangered Species coverage under the NPDES permit (EPA)?

DA Dn De On ~E

Criterion A.

Criterion B.

Criterion C

Criterion D.

No federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in your site's "action area" as defined in Appendix A of EPA permit.

The construction site's discharges and discharge-related activities were already addressed in another operator's valid certification of eligibility for your action area under eligibility Criterion A, C, D, E, or F and there is no reason to believe that federally-listed species or federally-designated critical habitat not considered in the prior certification may be present or located in the "action area". To certify your eligibility under this Criterion, there must be no lapse ofNPDES permit coverage in the other operator's certification. By certifying eligibility under this Criterion, you agree to comply with any effluent limitations or conditions upon which the other operator's certification was based. You must include in your NOI the tracking number from the other operator's notification of authorization under this permit. If your certification is based on another operator's certification under Criterion C, you must provide EPA with the relevant supporting information required of existing dischargers in Criterion C in the EPA NOI form.

Federally-listed threatened or endangered species or their designated critical habitat(s) are likely to occur in or near your site's "action area," and your site's discharges and discharge-related activities are not likely to adversely affect listed threatened or endangered species or critical habitat. This determination may include consideration of any stormwater controls and/or management practices you will adopt to ensure that your discharges and discharge-related activities are not likely to adversely affect listed species and critical habitat. To make this certification, you must include the following in your NOI: 1) any federally listed species and/or designated habitat located in your "action area"; and

2) the distance between your site and the listed species or designated critical habitat (in miles). You must also include a copy of your site map with the NOL

Coordination between you and the Services has been concluded. The coordination must have addressed the effects of your site's discharges and discharge-related activities on federally-listed threatened or endangered species and federally-designated critical habitat, and must have resulted in a written concurrence from the relevant Service(s) that your site's discharges and discharge-related activities are not likely to adversely affect listed species or critical habitat. You must include copies of the

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Criterion E.

Criterion F.

correspondence between yourself and the Services in your SWPPP and NOi.

Consultation between a Federal Agency and the U.S. Fish and Wildlife Service and/or the National Marine Fisheries Service under section 7 of the ESA has been concluded. The consultation must have addressed the effects of the construction site's discharges and discharge-related activities on federally-listed threatened or endangered species and federally-designated.critical habitat. The result of this consultation must be either:

i. a biological opinion that concludes that the action in question (considering the effects of your site's discharges and discharge-related activities) is not likely to jeopardize the continued existence of listed species, nor the destruction or adverse modification of critical habitat;

or

IL written concurrence from the applicable Service(s) with a finding that the site's discharges and discharge-related activities are not likely to adversely affect federally-listed species or federally-designated habitat.

You must include copies of the correspondence between yourself and the Services in your SWPPP and NOI.

Your construction activities are authorized through the issuance of a permit under section 10 of the ESA, and this authorization addresses the effects of the site's discharges and discharge-related activities on federally listed species and federally-designated critical habitat. You must include copies of the correspondence between yourself and the Services in your SWPPP and NOi.

Support Documentation for Endangered Species criterion eligibility is filed in TAB 16.

6.2 Historic Preservation

1. Will the project involve installation of any of the following stormwater .controls that entail subsurface earth disturbance? Yes

D Dike

D Berm

D Catch Basin

D Pond

~ Ditch, trench, swale, perimeter drain, etc.

~ Culvert

D Other ground-disturbing stormwater control Click here to enter text.

If the project involves no installation of earth-disturbing stormwater controls, then no further historic preservation screening is necessary (for NPDES permitting purposes).

2. If answer to step 1 is Yes, have professional surveys or evaluations determined that historic properties do not exist (or have prior disturbances at the site precluded the existence of historic properties)? Yes

[20]

Provide documentation for the basis of this determination. FS completed Section 106 consultation and surveys; Forest Service is Section 106 lead.

3. If answer to step 2 is No, have professional surveys or evaluations determined that installation of stormwater controls will have no effect on historic properties? Choose an item.

Provide documentation for the basis of this determination. Click here to enter text.

4. Has the State Historic Preservation Officer (SHPO), Tribal Historic Preservation Office (THPO) or other tribal representative concurred with the determinations of effects on historic properties? Yes

Provide the nature of their response. SHPO concurrence letter for Site Road 1502 MP 1.5. Other sites are covered by a Programmatic Agreement. The FS is the Section 106 Federal Lead for the project sites.

6.3 Safe Drinking Water Act Underground Injection Control Requirements

Will the project plan install any of the following controls? No

Check all that apply:

D Infiltration trenches (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than is widest surface dimension, or has a subsurface fluid distribution system)

D Commercially manufactured pre-cast or pre-built proprietary subsurface detention vaults, chambers, or other devices designed to capture and infiltrate stormwater flow.

D Drywells, seepage pits, or improved sinkholes (if stormwater is directed to any bored, drilled, driven shaft or dug hole that is deeper than its widest surface dimension, or has a subsurface fluid distribution system)

· If yes, provide documentation of communications with the EPA or applicable State agency.

Click here to enter text.

[21]

Section 7: Erosion and Sediment Controls

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.

The objectives of this SWPPP include:

• Stabilize the site as soon as possible (targeting the preparation and implementation of erosion and sediment controls to get the site to final grade, and either permanently or temporarily stabilize all bare soil areas as soon as possible).

• Perimeter controls will be installed before ground disturbing activities are initiated.

• Perimeter protection will remain in place until final stabilization has been achieved.

• Slopes and channels will be protected by conveying concentrated stormwater runoff around the top of slopes and stabilize slopes as soon as possible. A void disturbing natural channels and the vegetation along natural channels as much as possible.

• Divert stormwater coming on to the site by conveying it safely around, through, or under the work area. (Divert the clean water, trap the dirty water.)

• Protect receiving waters and other environmentally sensitive waters or areas adjacent to the site.

• Follow pollution prevention measures by providing proper containers for waste and garbage at the site. Store hazardous materials and chemicals so that they are not exposed to stormwater.

• Minimize the area and duration of exposed soils. Clear only land that will be under construction in the near future.

7.1 Natural Buffers or Equivalent Sediment Controls (Required for EPA CGP states only - ID, WA)

This section only applies if a surface water is located within 50 feet of the project's earth disturbing activities.

Are there any surface waters within 50 feet of the project's earth disturbances? Yes

NOTE: Reference EPA CGP appendix G for buffer guidance.

If Yes, check which natural buffer compliance alternative is used at the project site:

D The project will provide and maintain a 50-foot wide undisturbed natural buffer.

The location and width of natural buffers are shown on the Erosion and Sediment Control Plan sheets in TAB 6.

D The project will provide and maintain an undisturbed natural buffer that is less than 50 feet in width and is supplemented by additional erosion and sediment controls, which in combination achieves the sediment load reduction equivalent to a 50-foot undisturbed natural buffer.

The location of natural buffers is shown on the Erosion and Sediment Control Plan sheets in TAB 6.

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Insert the width of the natural buffer to be retained Click here to enter text.

Insert description of additional erosion and sediment controls to be used in combination with the natural buffer: Click here to enter text.

Document the method used to determine that the above combination of natural buffer and sediment and erosion controls equal the estimated sediment removal capacity of a 50-foot undisturbed natural buffer: Click here to enter text.

~ It is infeasible to provide and maintain an undisturbed natural buffer of any size, therefore, the project will implement erosion and sediment controls that achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer.

Insert rationale for concluding that providing and maintaining a natural buffer of any size is infeasible: Most of the ERFO repair sites include in-water work and therefore it is not feasible to maintain a natural buffer between the work activities and streams.

Insert description of erosion and sediment controls to be used to achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer: Fiber rolls and silt fence

D The project qualifies for one of the exceptions in EPA CGP Part 2.1.2.1.e

D For a "linear project", site constraints (e.g. limited right of way) make it infeasible for the project to meet any of the CGP part 2.1.2.1.a compliance alternatives.

D Other exception (state type): Click here to enter text.

Document why it is infeasible to meet one of the buffer compliance alternatives: Click here to enter text.

Insert description of erosion and sediment controls to be used to achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer: Click here to enter text.

7 .2 Perimeter Controls

All Perimeter Sediment Controls will be installed prior to ground disturbing activities taking place. There will be no clearing or grubbing outside the physical clearance limits.

Locations and design specifications ofBMPs are shown on the erosion and sediment control plan sheets in TAB 6.

The following perimeter controls will be implemented:

Measure: Fiber rolls

Implementation: All fiber rolls will be installed prior to any ground disturbing activities. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Sediment will be removed from fiber roll perimeter controls before deposits reach 50% of the above ground height. It is the Contractor's responsibility to upgrade erosion control measures as necessary if the sediment controls are ineffective and turbid water is observed discharging from the site. Fiber rolls will not be removed until vegetation is satisfactorily established.

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Contractor and PE Note: Add additional measures used during construction.

7 .3 Sediment Track-Out

The following methods will be implemented to minimize off-site vehicle tracking of sediment onto paved surfaces. If sediment escapes the construction site, off-site accumulations of sediment will be removed at a frequency sufficient to minimize off-site impacts.

Locations and design specifications of BMPs are shown on the erosion and sediment control plan sheets in TAB 6.

Measure: Washing within perimeter, without detergents or solvents

Implementation: During active construction, as necessary. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Care must be taken that runoff is directed within construction perimeter and is to be managed by established control methods already in place. Any uncontrollable runoff must be remedied and additional BMPs put in place.

Measure: Stabilized Construction Exit Implementation: Wherever traffic will be leaving a construction site and traveling onto paved roads or other paved areas, within 1,000 feet of the site. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Any sediment that is tracked onto pavement shall be removed by shoveling or sweeping. The sediment collected by sweeping shall be removed or stabilized on site. The pavement shall not be cleaned by washing down the street, except when sweeping is ineffective and there is a threat to public safety.

Contractor and PE Note: Add additional measures used during construction.

7 .4 Stockpiled Soil or Other Erodible Materials

Stockpile management includes measures to minimize surface erosion and sediment transport from soil stockpiles or other erodible materials.

Locate erodible stockpiles away from drainages including storm sewer inlets and culvert inlets.

Locations of stockpiles are shown on the erosion and sediment control plan sheets in TAB 6.

Measure: Revegetation with contractor-approved seed mix

Implementation: In places where exposed soil surfaces are not to be fine-graded for periods longer than 30 days. Please also refer to project schedule, contract, and plan set (Erosion Control section).

[24)

Maintenance: Frequent inspections until proper vegetative establishment has been made.

Measure: Fiber rolls

Implementation: All fiber rolls will be installed prior to any ground disturbing activities. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Sediment will be removed from fiber roll perimeter controls before deposits reach 50% of the above ground height. It is the Contractor's responsibility to upgrade erosion control measures as necessary if the sediment controls are ineffective and turbid water is observed discharging from the site. Fiber rolls will not be removed until vegetation is satisfactorily established.

Measure: Silt Fence

Implementation: The silt fence shall be functional before other land disturbing activities take place. Silt fence should be functional throughout the duration of construction and for a long enough duration following construction to allow disturbed areas to stabilize following revegetation and seeding. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Silt fences should be inspected periodically for damage (such as tearing by wind, animals, or equipment) and for sediment that has accumulated. Remove the sediment when it reaches one-half the height of the silt fence. In situations where access is available, machinery can be used. Otherwise, silt should be removed manually. The following are key elements to remember:

• The sediment deposits should be removed when heavy rain or high water is anticipated.

• The sediment deposits should be placed in an area where there is little danger of erosion.

• The silt fence should not be removed until adequate vegetative growth ensures no further erosion of the slopes. Generally, the fabric is cut at ground level, the wire and posts are removed, then the sediment is spread, seeded,· and protected (mulched) immediately.

Measure: Plastic sheets Implementation: Soil stockpiles and other erodible materials should be covered by plastic as soon as they are generated. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Contractor should frequently check plastic to ensure soil or other erodible material is covered.

Measure: Temporary construction access Implementation: Temporary construction access will be installed at the beginning of construction and will provide access to and from the sites. Vehicle use will be restricted to designated construction entrances to minimize the tracking out of sediment. Please also refer to project schedule, contract, and plan set (Erosion Control section).

[25]

Maintenance: Where sediment has been tracked-out from the site and onto the surface of off-site streets, other paved areas, and sidewalks, remove the deposited sediment by the end of the same work day in which the track-out occurs, or by the end of the next work day if track-out occurs on a non-work day. Remove the track-out by sweeping, shoveling, or vacuuming these surfaces, or by using other, similarly effective means of sediment removal. Hosing or sweeping tracked-out sediment into any stormwater conveyance (unless it is connected to a sediment basin, sediment trap, or similarly effective control), storm drain inlet, or surface water is prohibited;

Contractor and PE Note: Add additional measures used during construction.

7 .5 Minimize Dust

Dust control includes practices used to reduce or prevent the surface and air transport of dust during construction

Measure: Application of water for dust control

Implementation: During active construction as needed. Apply at a rate of 3 gallons per acre, using a diffused or sprinkled flow.