ESCP_OR_BLM_SAL_040727(1).pdf

Erosion and Sediment Control Plan

ESCP·

For:

OR BLM SAL 040727(1)

Nestucca River Back Country Byway Phase 1

Yamhill and Tillamook Counties, Oregon

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer: __________ _

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

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 Revegefation Plan (phm 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)

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SWPPP (ESCP - Oregon) NARRATIVE

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CONTRACTOR:

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

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

ALASKA, IDAHO AND WASHINGTON PROJECTS ONLY:

SWPPP narrative must be signed by General Contractor's responsible corporate officer as defined in CGP I.11.2.

File approved SWPPP narrative in Tab 1.

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:

Name, Title:

Company/Organization:

Address:

Telephone Number:

Nestucca River Back Country Byway Phase 1

OR BLM SAL 040727(1)

Nestucca River Back Country Byway (BCB), Southeastern corner of Tillamook County, Oregon

Nearest City: Carlton, Yamhill County, Oregon, 97111

FHW A, Wes tern Federal Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7700

Christopher J. Kelly, Environmental Protection Specialist

FHWA, Western Federal Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7806

SWPPP Preparation Date: 05/03/2017

Estimated Construction Start Date: 10/01/2017 Estimated Construction Completion Date:

11130/2019

Estimated Revegetation Start Date: 11/15/2019 Estimated Revegetation Completion Date:

10/15/2021

TAB 1:

TAB2:

TAB3:

TAB4:

TABS:

TAB6:

TAB7:

TAB8:

TAB9:

TAB 10:

TAB 11:

TAB 12:

TAB 13:

TAB 14:

TAB 15:

TAB 16:

TAB 17:

TAB 18:

SWPPP T ABs (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)

SWPPP/ESCP NARRATIVE

SECTION 1: RESPONSIBLE PARTIES/CONTACT INFORMATION

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 ofWork:

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

7 .2 Perimeter Controls

7.3 Sediment Track-Out

7 .4 Stockpiled Soil or Other Erodible Materials

7.5 Minimize Dust

[i]

7.6 Minimize Disturbance of Steep Slopes

7.7 Topsoil Conservation

7.8 Minimize Soil Compaction

7 .9 Storm Drain Inlets and Culvert Inlets

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 ... 31

8.1 Hazardous Spill Plan

8.2 Spills/Releases in Excess of Reportable Quantities

8.3 EquipmentN ehicle Fueling and Maintenance Practices

8.4 EquipmentNehicle Washing

8.5 Material Handling and Waste Management

8.6 Designate Concrete Washout Areas

SECTION 9: INSPECTIONS

9.1 Inspection Frequency

9.2 Corrective Actions

SECTION 10: DELEGATIONS OF AUTHORITY

SECTION 11: STAFF TRAINING

SECTION 12: CERTIFICATION AND NOTIFICATION

[ii]

1.1 Operator(s):

Organization Name:

Address:

Telephone Number:

FHWA, Western Federal Lands Highway Division (WFLHD 610 East Fifth Street Vancouver, WA 98661-3801 360-619-7700 information following contract award date and prior to start of construction

1.2 Construction Site SWPPP Contact(s):

FHWA Contact Name: TBD

Title: Project Engineer

Address:

Telephone Number:

General Contractor, TBD Company:

(complete for all States) Erosion Control Supervisor Name:

(complete for all States) Address:

Telephone Number:

1.3 SWPPP Prepared by:

Organization/Company:

Name, Position:

Role/Responsibility Telephone Number:

Email:

Christopher J. Kelly, Environmental Protection Specialist SWPPP preparer 360-619-7806 christopher .kell y@dot.gov

1.4 NPDES Stormwater Permit

The Applicable EPA/State NPDES Stormwater Permit is located in The Project NOI and EPA/State Acknowledgement with NPDES Tracking Number is located in 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

[I] 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

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

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

1.6 Permitting Authority for FHW A/WFLHD Projects

Delivery Confirmation documentation of the NOI is located in 3.

The applicable EPA/State NPDES permit is located in 2

Idaho and Washington, Environmental Protection Agency EPA Region 10

Alaska Department of Environmental Conservation (ADEC)

Montana Department of Environmental Quality (MDEQ)

Oregon Department of Environmental Quality (ODEQ)

Wyoming Department of Environmental Quality (WDEQ)

State Permitting Authority 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 Country lands within the state .

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

• EPA is the permitting authority for Indian Country 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

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 A/WFLHD 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.

[2]

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 ofintent (NOI) after the SWPPP is complete.

Project Name:

Project Site Location:

City, County, State, Zip Code:

Nestucca River Back Country Byway Phase 1

OR BLM SAL 040727(1)

Nestucca River Back Country Byway (BCB), Southeastern comer of Tillamook County, Oregon

Nearest City: Carlton, Yamhill County, Oregon, 97111

Latitude/Longitude (Using one of three possible formats) 1

Nestucca River Access Road

Start: Latitude: 45.2885 ° N, Longitude: -123.5048 ° W, Township: 3S, Range: 7W, Section: 23

Finish: Latitude: 45.2817 ° N, Longitude: -123.5447 ° W, Township: 3S, Range: 7W, Section: 27

Bible Creek Access Road (Detour Route Only)

Start: Latitude: 45.2053 ° N, Longitude: -123.5350 ° W, Township: 4S, Range: 7W, Section: 22

Finish: Latitude: 45.2446 ° N, Longitude: -123.5947 ° W, Township: 4S, Range: 7W, Section: 7

Bald Mountain Access Road (Detour Route Only)

Start: Latitude: 45.3165 ° N, Longitude: -123.4444 ° W, Township: 3S, Range: 6W, Section: 17

Finish: Latitude: 45.2053 ° N, Longitude: -123.5350 ° W, Township: 4S, Range: 7W, Section: 22

The method used for determining latitude/longitude was: USGS Topographic

Is the project located in Indian country? No

If yes, the name of Reservation is:

Name of Reservation:

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

The project discharge stormwater into a Municipal Separate Storm Sewer System?

1 Detailed information on determining the site's latitude and longitude can be found at:

www.epa.gov/npdes/stormwater/latlong

[3]

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 6) , as well as natural resources that should be protected are described below:

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

Types: The entire study area is forested and largely undeveloped, the exceptions being Nestucca Access Road and a few scattered camping/recreational sites. Tree species are almost exclusively red alder (Alnus rubra), big-leaf maple (Acer macrophyllum ), and Douglas fir (Pseudotsuga menziesii). The shrub stratum is dominated by vine maple (Acer circinatum), salmonberry (Rubus spectabilis), and devil's club (Oplopanax horridus). Herb species include piggy-back plant (Tolmeia menziesii), Pacific waterleaf (Hydrophyllum tenuipes), stinging nettle (Urtica dioica), sword fern (Polystichum munitum), Pacific bleeding heart (Dicentra .formosa), Siberian spring beauty (Claytonia sibirica), and lady fern (Athyriumfilix .femina). Within wet roadside ditches and seeps, water parsley (Oenanthe sarmentosa) is common.

Eight wetlands totaling 0.58 acre were documented within the study area.

Twenty-eight naturally occurring waterways were recorded within the study area, including the Nestucca River (Stream 2), Davidson Pit Creek (Stream 3), No Name Creek (Stream 14), and Elk Creek (Stream 24). In general, the streams contain a cobble-gravel substrate with an overstory of vine maple, salmonberry, red alder, Douglas fir, and big-leaf maple. While logging occurred historically, the riparian areas currently appear relatively undisturbed and function to provide the streams with shade, leaf litter, woody debris, and habitat for various organisms. The streambanks are somewhat incised as the streams are relatively fast moving with little meandering, and the rapidly draining, coarse-textured soils are prone to move around, which can result in natural scour and erosion.

Also, see 6

Stormwater currently drains from the site in the following manner, On the uphill side of the roadway, stormwater drains from roads into roadside ditches, then into perennial or intermittent streams or cross drains, before draining to the Nestucca River. On the downhill side of the roadway, most runoff drains off the road and is dispersed into vegetation along the slope.

Also, see 6

The location of discharge points or areas

Nestucca River, Elk Creek, Davidson Pit Creek and multiple unnamed tributaries to the Nestucca River.

Also see 6

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

[4]

Critical slopes and slope lengths include:

Locations: There is one slide location along the Nestucca River Access Road that had an initial failure in March 2016. The exposed slide area is approximately 75 feet in vertical height above the road and 60 feet wide. Slide is located at approximate station 784+00 to 784+75.

Soil type(s) of highly erodible soils and the soils' infiltration capacity are identified as,2

Geologic Hazard Mapping Summary

Geologic: Hazard Mapping Earthquake Hazards:

- Active Faults Nearest active fault is the Tillamook Bay fault zone approx. 10 miles north.

- Liquefaction No mapping of areas that appear to be affecting the roadway in the project area.

- Expected earthquake "Very strong" mapping over the shaking entire vicinity

Landslide Hazard "High" mapping over the entire vicinity

Volcanic Hazard No areas mapped as high or moderate in the region.

Tables - Available Water Capac;ity - Summary Bv Map Unit

43F

48E

Map unit symbet

Map unit name

Klistan-Harslow-Hemcross complex,. 60 to 90 percent slopes

Hemcross-Klistan complex, 5 to 30 percent slopes

Hemcrnss-Klistan complex, 30 to 60 percent slopes

Any past soil contamination at the site is identified as, NIA

2 Access the Natural Resources Conservation Service Web Soil Survey.

[5]

Description

Based on the distance to the site, the risk of surface rupture is considered low The risk Is considered low based on the mapping.

Very strong ground motions expected Landsliding Likely

Risk is considered low.

Ratin~ (centimeters per centin1eter)

Cl.13

0.40

Q.40

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

Also see 6

Protected Natural Features:

Table 4. Wetlands Summary Table

Wetland Acres Cowardtn HGM sample Anticipated OR State Anticipated Federal Notes

Name Within Class* Class Plots (DSl) Jurisdiction (USACE) Jurisdktlon Stud Area

Wl 0.0&4 PFOC Slop• Wl·SPl Ukely - Natural Ukely- Seasonat Wetland Wl begins as seeps both above and WJ.SP2 wetland feature connection to a Water befow Nestucca River Road. The two wetland Wl-SP3 of the United States polygons are connected by a culvert.

(WOUS) via Stream 6

W2 0.004 PSSC Slope W2-SP1 likely - Natural Likely - Seasonal Seeps to a depressional area before a cufvert inlet;

W2-SP2 wetland feature connection to a WOUS culvert outlet begins Stream 9. Wetland via Streams dominated by salmoriberry and an upland slope ove-rsto!l of red alder and Dous.las~fir.

W3 0.192 PFOC Slope W3-SP1 likely - Natural likely - Seasonal Wide, topographically defined seep area above W3·SP2 wetland feature connection to a WOUS Nestucca River Rood. Drains scuthi.11e-st to culvert, via Streams 10, 11, and emerging as Stream 10. Also d:ra~ns northwest to 12 Stream 11, which flows to Stream 12.

W4 0.001 PEMA Depressionaf Not Likely-Narrow (1- Not likely - Isolated and Fed by a roadside ditch. Silty road runcll perched 5 feet) roadside ditch no discernable over a day restrictive layer. Boundaiy defined by depression below connection or seasonal ste€-p topographic depression. Wetland is culvert inlet nexus to a WOUS approximately 8 inches below culvert int-et. No outflow through culvert observed; no stream or channel observed at culvert outfall.

ws 0.158 PFOC Slope W5-SP1 likely - Natural likely- Seasonal Seeps upslope of Nestucca Rivet Road. Stream 17 W5-SP2 wetland feature connection to a WOUS sheet flows within wetland. Dense stinging nettle W5-SP3 via Stream 17 o ulation.

W6 0.016 PEMC Slope likely - Natural Likely - Seasonal Seep expressed at steep road-!'..ut slope. Drains wetland seep connection to a WOUS west to roadside ditch that joins Stream 19.

via Stream 19 W7 0.113 PFOC Slope W7-SP1 likely - Natural Uke!y-Seasonal Several seeps above Nestucca Rive:r Road. Old, W7-SP2 wetland feature connection to a WOUS compacted, grown-over logging road with bu<ied W7-SP3 via Stream 20 culvert bisects wetland.

W8 0.016 PFOA Riverine W8·SP1 likely - Natural Ukely-Seasonal Occurs amid and just beyond a short forked W8·SP2 wetland feature connection to a WOUS section of Stream 20. The stream supplies via Stream 20 seasonal surface and sroun-dwater ineut:s:.

Total 0.583 acre

Table 5. Waters Summary Table

Waterway Length Average Cowardln Streamflow Anticipated OR State Anticipated Federal Notes Name Within OHW Class• Duration (DSL) Jurisdiction (USACE) Jurisdiction

Study Width Area (feet) (feet)

Stream 1 222 R4SB3 Intermittent likely - Connects to Likely - Connects to the Cu!verted, likely fish passage barrier.

the Nestucca River, a Nestucca River, a WOUS, Water of the United States WOUS

Stream 2/ 1,639 50 R3UB! Perennial Likely- Nestucca River Uke!y- Nestucca River is Flow west to Pacific Ocean. Fish Nestucca (approx.) {approx.) isa WOUS aWOUS bearing. Enters or abuts study area in

River several locations. Left bank (south) not surve ed.

Stream 3 183 R4SB3 Intermittent likely - Connects to Likely - Connects to the Culverted, likely fish passage barrier.

the Nestucca River Nestucca River

Stream 4 174 4 R4583 Intermittent Likely -Connects to Likely - Connects to the Culverted, likely fish passage barrier.

the Nestucca River Nestucca River

Stream 5 146 R4SB3 Intermittent Likely - Connects to Likely - Connects to the Culverted 1 likely fish passage barrier.

the Nestucca River Nestucca River

Stream 6 235 R4SB3 Intermittent Likely - Connects to likely - Connects to the Culverted 1 likely fish passage barrier.

the Nestucca River Nestucca River Includes a very small side channel that originates separately within the study area.

Stream 7 85 Ephemeral Not likely - Ephemeral Possibly - Connects to the Very steep1 recorded an offset GPS flow from wet ditch Nestucca River point for downslope centerline. Begins at culvert outfall from wet roadside ditch. Fish presence unlikely.

Stream 8 192 R4SB3 Intermittent Likely - Connects to likely - Connects to the Spreads at culvert outfall and narrows the Nestucca River Nestucca River a~ain. Culverted, fish eresence unlike!~, [6]

Stream9 98 R4SB3 Intermittent Likely- Connects to Likely - Connects to the Begins at culvert outfall from Wetland the Nestucca River Nestucca River W2. Shallow, briefiy spreads out to 7 feet wide. Fish presence unlikely.

Stream 10 104 R4SB3 lntermittent Likely- Connects to Likely - Connects to the Begins at culvert outfall from Wetland the Nestucca River Nestucca River W3. Fish presence unlikely.

Stream 11 135 1.5 R4SB6 Intermittent likely- Conneds to Likely - Connects to the Roadside ditch from Wetland W3 and the Nestucca River via Nestucca River via Stream flows into Stream 12. Substrate of Stream 12 12 sticks and leaf litter. No fish eresence.

Stream 12 296 R4SB3 Intermittent likely- Connects to Likely - Connects to the Relatively wide stream channel.

the Nestucca River Nestucca River Receives flow from Wetland W3 via

Stream 11. Culverted, likely fish passage barrier.

Stream 13 223 R4SB3 Intermittent likely- Connects to Likely - Connects to the Culverted, fish presence unlikely.

the Nestucca River Nestucca River Similar substrate1 bank, and riparian conditions to the other small streams.

Stream 14 337 4.5 R4SB3 Intermittent Likely- Connects to Likely- Connects to the Culverted1 fish presence unlikely.

the Nestucca River Nestucca River Incised.

Stream 15 225 R3UB1 Perennial Likely -Connects to the Likely - Connects to the Culverted, likely fish passage barrier.

Stream 15a 95 R4SB3 Intermittent Nestucca River; Nestucca River; Seasonal Contains three intermittent tributaries

Stream l5b 58 R4SB3 Intermittent seasonal tributaries tributaries flow to Stream that flow in from the west and one Stream 15c 99 2.5 R4SB3 Intermittent flow to Stream 15. 15. ephemeral tributary that begins at a Stream 15d 80 Ephemeral Ephemeral not likely. Ephemeral possibly. roadside ditch culvert outfall.

Stream 16 257 R4SB3 Intermittent Likely - Connects to Likely - Connects to the Culverted, likely fish passage barrier.

the Nestucca River Nestucca River

Stream 17 218 2.5 R4SB3 Intermittent Likely - Connects to Likely - Connects to the Incised channel through top of Wetland the Nestucca River Nestucca River W5, sheet flow within wetland, and channelized again at culvert outfall.

Fish presence unlikely.

Stream 18 254 5.5 R4SB3 Intermittent Likely - Connects to likely- Connects to the Culverted. Widens before culvert inlet the Nestucca River Nestucca River and widens again at its confluence with the Nestucca River.

Stream 19 281 1.5 R4SB3 Intermittent Likely - Connects to Likely- Connects to the Flows into roadside ditch and continues the Nestucca River Nestui;~a River west through Wetland W7 to join

Stream 20 above culvert inlet.

Impassable upslope due to very dense vine ma le. No fish resence.

Stream 20 209 2.5 R4SB3 Intermittent Likely- Connects to Likely -Connects to the Flows through Wetland W7 with buried the Nestucca River Nestucca River culvert at old, grown-over logging road.

Forks through Wetland W8 and supplies groundwater interflow. Culvert ossible fish assa e barrier.

Stream 21 258 R4SB3 1ntermittent Likely - Connects to Likely - Connects to the Culverted. Fish presence unlikely.

the Nestucca River Nestucca River

Stream 22 239 2.5 R4SB3 Intermittent Uke!y - Connects to likely - Connects to the Culverted. Fish presence unlikely.

the Nestucca River Nestucca River

Stream 23 41 Ephemeral Not likely - Ephemeral Not likely - Ephemeral Begins at culvert outfall and flow from culvert flow from culvert outfall. dissipates/infiltrates after a very short outfall. Infiltrates. Infiltrates. distance, No fish eresence.

Stream 24/ 563 40 R3UB1 Perennial Likely - Elk Creek is a Likely - Elk Creek is a Fish bearing, major tributary to the Elk Creek (approx.) wous wous Nestucca River. Right bank (west) not surve ed for safet reasons.

Total 6,930 feet (1.31 mile I 27.68 acre)

-From Wetland Delineation

Measures to protect these features:

Minimization and/or avoidance of construction disturbances, buffer zones, silt fences, temporary stabilization methods, rehabilitation of disturbed areas.

[7]

Mean Annual Precipitation at the Project Site: 85.07 inches

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, The 2-year, 24-hour storm event:3

5. 7 Inches per day

The IO-year, 24-hour storm event:

7 .5 Inches per day

The 25-year, 24-hour storm event:

8.5 Inches per day

Alaska Projects Only, Approximate Growing Season at the Project Site:

(8] to enter text.

3.1 General Description of Project and Scope of Work:

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

Phase 1 of the project would complete work on a 3 mile gravel section of the Nestucca River Road (MP 12.76 to MP 15.44) and complete safety improvements on Bible Creek and Bald Mountain Access roads. The proposed work would consist of the following:

1. Safety Improvements of Bald Mountain Access Road and Bible Creek Road

• Upgrade signing and striping

• Sight line improvements (hazardous tree removal)

• Off Highway Vehicle (OHV) crossing improvements on Bald Mountain Road

• Additional tum-outs on Bible Creek Road and Bald Mountain Road

2. Reconstruction ofNestucca Access Road (MP 12.76 - MP 15.44)

• 3 mile reconstruction and widening of roadway with new culverts

• Replace No Name 1 Culvert with Fish Passage Culvert

• Replace Davidson Pit Culvert with Fish Passage Culvert

• Pave Elk Bend Campground parking

• Replace minor culverts and cross drains

The type or function of the project is: Road Construction

[9]

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):

contract to start construction

TBD

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

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: 0 %

Runoff Coefficient BEFORE Construction: 0.85

Percent Impervious Are AFTER Construction: 36 %

Runoff Coefficient AFTER Construction: 0.90

[10]

Units

20.0 Acres

16.0 Acres

3.

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M P s as so ci at ed w it h th is s eq ue nc e:

I S ta bi li za ti on m ea su

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D D D D

D I~ D

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 "" ... "'

... ~ = ., = ·;:: "' 'O

"" e ., ..= -~ ·c ~ ....... ·5 ..!:: ~ ,,, ... ;::: ... = ;a ... "",.Q "' "" .= = ... = "" = 0 ....... ... ., 00 z i:.::i c. !'- Q i:... = Oi:...

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

+= Landscaping operations x x =i x Mining, rock extraction, crushing x x x

Contractor and

Note: m incomplete to start construction

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

Material Storage Location

TBD

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

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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

I.None

2.

3.

Stormwater Discharge Location

5.1 Allowable Non-Stormwater Discharges

Multi-Sector General Permit Number (if applicable)

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

• [8J

• D

• [8J

• [8J

• D

• D

• D

• D

• [8J

• D

• D

Potential Non-Stormwater Discharges

Waters used to wash vehicles where detergents are not used

• Water used to control dust

• Potable water including uncontaminated water line flushings

• Construction dewatering (uncontaminated)

• Ground water or spring water (uncontaminated)

• Routine external building wash down that does not use detergents

• 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

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

• Landscape irrigation

• Discharges from emergency fire-fighting activities

• Fire hydrant flushings

• Uncontaminated air conditioning or compressor condensate

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Control Measures

NOTE: The likely locations of these discharges are identified on the site map 5

5.2 Receiving Waters:

Are there any surface waters located within 50 feet of the construction disturbance? Yes

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

· from the MS4

3.Elk Creek

Impaired Waters/TDMLs:

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

Is this pollutant(s) is water listed as causing the impairment?

"impaired?"

1. Yes C8J No D Sedimentation, Biological Yes C8J No D Criteria, Dissolved

2. Yes D No C8J

3. Yes D No C8J

Oxygen

Yes D No C8J Yes D No

Pollutant(s) for which there is a TDML

Sedimentation and Temperature

Source used to determine whether or not your project discharges into an impaired water:

State of Oregon 303( d) list

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

Is this surface water designated as Tier 1, 2 or 3?

yes, specify which Tier.

If applicable, documentation of consultation with State or Federal TMDL authorities on consistency of SWPPP conditions with the approved TMDL is found in 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 TMDL, including any specific waste-load allocations are included in that documentation.

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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 11.

Samples and measurements taken for the purpose of monitoring will be representative of the monitored activity. Records of all monitoring information will be retained in 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.

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6.1 Endangered Species Protection

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

DA DB De Dn ~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

NOL

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 (taking into account 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

n. 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 NOL

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 NOL

Support Documentation for Endangered Species criterion eligibility is filed in 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 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

Provide documentation for the basis of this determination. WFLHD survey

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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? an

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?

Provide the nature of their response. Likely Have No Effect on Historic Properties

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.

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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

If No, then no further documentation is required for the SWPPP.

NOTE: Reference EPA CGP appendix G for buffer guidance.

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

C8J 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

Note: Natural Buffers are provided in some portions of the project where at least a 50-foot wide undisturbed natural buffer can be maintained. Other areas of the project will require additional erosion and sediment control BMPs.

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C8] 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 buff er.

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

Insert the width of the natural buffer to be retained Varies

Insert description of additional erosion and sediment controls to be used in combination with the natural buffer: Fiber roll and/or Silt Fence, refer to TAB 6

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: Identification of buffer widths using maps of the project area, along with evaluation of slope steepness and project activities to determine appropriate sediment and erosion control methods for each area of the project.

C8] 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: There are multiple streams that cross under the roadway that drain to the Nestucca River. In these locations it will not be possible to maintain a natural buffer.

Insert description of erosion and sediment controls to be used to achieve the sediment load reduction equivalent to a 50-foot undisturbed natural buffer: Silt fence and/or fiber roll.

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): to enter text.

Document why it is infeasible to meet one of the buffer compliance alternatives:

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 to enter text.

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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 of BMPs are shown on the erosion and sediment control plan sheets in 6.

The following perimeter controls will be implemented:

Control measure: Fiber rolls

Implementation: All fiber rolls will be installed prior to any ground disturbing activities.

Maintenance requirements: Sediment will be removed from fiber roll perimeter controls before deposits reach 50% of the above ground height. Fiber rolls will not be removed until vegetation is satisfactorily established.

Control 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.

Maintenance requirements: Silt fences should be inspected periodically for damage (such as tearing by wind, animals, or equipment) and for the amount of 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, the 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.

Add other measures as needed.

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.

IZI Not applicable to this project. Reason: Although specific BMPs are not included for sediment track-out, the contract does require the contractor to remove accumulations of soil or other material from the roadway. The reconstruction portion of the project where sediment track-out could occur is short ( 400 feet in length) and isolated.

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If applicable:

Control measure: to enter text.

Implementation: Click here to enter text.

Maintenance requirements: Click to enter text.

Control measure:

Implementation:

to enter text.

to enter text.

Maintenance requirements: Click here to enter text.

Add other measures as needed.

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.

D Not applicable to this project. Reason: Click here to enter text.

If applicable:

Control measure: Plastic sheets

Implementation: All the soil stockpiles or other erodible materials should be covered by plastic all the time.

Maintenance requirements: Contractor should check the plastic cover frequently to make sure the soil or other erodible material is covered all the time.

Control measure: Temporary construction access (Note: Waste/Stockpile Sites only)

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.

Maintenance requirements: Where sediment has been tracked-out from the site 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.

Add other measures as needed.

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7 .5 Minimize Dust

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

D Not applicable to this project. Reason: to enter text.

If applicable:

Control measure: Sprinkling

Implementation: Apply at a rate so that the soil is wet but not saturated or muddy and so that no dust is being generated.

Maintenance requirements: Dust control requires constant attention: it is not a one-time or once in- awhile activity. Dust control sprinkling may have to be done several times a day during hot, dry weather.

Add other measures as needed.

7 .6 Minimize Disturbance of Steep Slopes

Describe how disturbance of steep slopes will be minimized. Describe controls (e.g. erosion control blankets, tackifiers) that will be implemented to minimize sediment discharges from slope disturbances.

If applicable, describe how stormwater run-on and run-off will be managed. Flows may be diverted from exposed soils by retaining/detaining flows or otherwise minimizing runoff and the discharge of pollutants from exposed areas of the site. Placement of structural practices in floodplains will be avoided to the degree technologically and economically practicable and achievable.

D Not applicable to this project. Reason: Click here to enter text.

If applicable:

Control measure: Turf reinforcement mat (in specified locations and as needed)

Implementation: Turf reinforcement mat will be installed within 21 days of starting construction.

Maintenance requirements: The turf reinforcement mat is a permanent feature that does not require maintenance.

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7.7…