OR FLAP POLK MITCHELL_CompiledESCP_Final_signed.pdf

Erosion and Sediment Control Plan

ESCP

Oregon NPDES

Permit# 1200-CA

For:

Federal Highway Administration Western Federal Lands Highway Division

Table of Contents

ESCP TABS

TAB 1: ESCP Narrative

TAB 2: OR DEQ NPDES Permit (1200-CA)

TAB 3: NOI (not required), DEQ Acknowledgement, Other Applicable Correspondence

TAB 4: Delegation of Authority

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

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

TAB 7: Revegetation Plan (if applicable)

TAB 8: ESCP Amendment Log

TAB 9: Inspection Reports

TAB 10: Corrective Action Log

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

TAB 12: Training/Certification Log

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

TAB 14: Grading and Stabilization Log

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

TAB 16: Environmental Management Plan (if required)

TAB 17: Quality Assurance Checklist

Tab 1 - ESCP Narrative

Revise and update as needed per SCR 107 and SCR 157

Erosion and Sediment Control Plan (ESCP)

For Construction Activities at:

Project Name: OR FLAP POLK MITCHELL(1): Mitchell Street and Black

Rock Road Reconstruction

Project Site Location: Mitchell Street and Black Rock Road

City, County, State, Zip

Code:

Falls City, Polk County, OR, 97344

ESCP Prepared for:

Organization Name: FHWA, Western Federal Lands Highway Division

Address: 610 East Fifth Street

Vancouver, WA 98661-3801

Telephone Number: 360-619-7700

ESCP Draft Preparation Date by FHWA: Click here to enter text.

Name, Title: Jennifer Corwin

Company/Organization: FHWA, Western Federal Lands Highway Division

Address: 610 East Fifth Street

Vancouver, WA 98661-3801

Telephone Number: (360) 619-7665

Certification/Training January 25, 2023 – Expires January 25 2026

ESCP Completion Date by Contractor: Click here to enter text.

Name, Title:

Company/Organization:

Address:

Telephone Number:

Certification/Training

Estimated Construction Start Date: January 2024

Estimated Construction Completion Date: November 2024

Estimated Construction Days/Hours: Click here to enter text.

Estimated Revegetation Start Date: September 2024

Estimated Revegetation Completion Date: November 2024

ESCP TABs (ESCP Inclusions)

TAB 1: ESCP Narrative

TAB 2: OR DEQ NPDES Permit (1200-CA)

TAB 3: NOI (not required), DEQ Acknowledgement, Other Applicable Correspondence

TAB 4: Delegation of Authority

TAB 5: Site Maps

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

TAB 7: Revegetation Plan (if applicable)

TAB 8: ESCP Amendment Log

TAB 9: Inspection Reports

TAB 10: Corrective Action Log

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

TAB 12: Training/Certification Log

TAB 13: Government-Selected Waste, Borrow, Staging Sites

TAB 14: Grading and Stabilization Log

TAB 15: SPCC Plan

TAB 16: Environmental Management Plan (if applicable)

TAB 17: Quality Assurance Checklist

TAB 1:

ESCP NARRATIVE

[i]

SECTION 1: RESPONSIBLE PARTIES/CONTACT INFORMATION

1.1 Operator(s):

1.2 Construction Site ESCP Contact(s):

1.3 ESCP Prepared by:

1.4 NPDES Stormwater Permit

1.5 ESCP Administrator

1.6 Permitting Authority for FHWA/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:

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: EROSION AND SEDIMENT CONTROLS

6.1 Perimeter Controls

6.2 Sediment Track-Out

6.3 Stockpiled Soil or Other Erodible Materials

6.4 Minimize Dust

6.5 Minimize Disturbance of Steep Slopes

6.6 Topsoil Conservation

6.7 Minimize Soil Compaction

6.8 Storm Drain Inlets and Culvert Inlets

6.9 Constructed Stormwater Conveyance Channels and Culvert Outlets

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6.10 Sediment Basins

6.11 Chemical Treatment

6.12 Dewatering Practices

6.13 Erosion Control and Stabilization

6.14 Removal of BMPs

6.15 Post Construction Measures

SECTION 7: OPERATIONAL CONTROLS/GOOD HOUSEKEEPING MEASURES

7.1 Spill Prevention, Control and Countermeasure Plan

7.2 Spills/Releases in Excess of Reportable Quantities

7.3 Equipment/Vehicle Fueling and Maintenance Practices

7.4 Equipment/Vehicle Washing

7.5 Material Handling and Waste Management

7.6 Designate Concrete Washout Areas

SECTION 8: INSPECTIONS

8.1 Inspection Frequency

8.2 Corrective Actions

SECTION 9: DELEGATIONS OF AUTHORITY

SECTION 10: STAFF TRAINING

SECTION 11: CERTIFICATION AND NOTIFICATION

[3]

Section 1: Responsible Parties/Contact Information

1.1 Operator(s):

Organization Name: FHWA, Western Federal Lands Highway Division (WFLHD)

Address: 610 East Fifth Street

Vancouver, WA 98661-3801

Telephone Number: 360-619-7700

Contractor and PE

Note: Fill in all incomplete information following contract award date and prior to preconstruction conference.

1.2 Construction Site ESCP Contact(s):

FHWA Contact Name:

Title:

Project Engineer

Address: 610 East Fifth Street

Vancouver, WA 98661-3801

Telephone Number: 360-619-7700

General Contractor Company:

Address:

Telephone Number:

Erosion Control Supervisor

Name:

Inspector/Visual Monitor Name and Contact Information (See

Tab 12 for certification)

Erosion Control Team Member

Name and Role/Responsibilities

Erosion Control Team Member

Name and Role/Responsibilities

Add rows as needed

Note: Identify erosion control team members and include required certifications under Tab 12

[4]

1.3 ESCP Prepared by:

Organization/Company: WFL/FHWA

Name, Position: Jennifer Corwin, Environmental Protection Specialist (EPS)

Role/Responsibility Preliminary ESCP Preparer

Telephone Number: (360) 619-7665

Email: jennifer.corwin@dot.gov

Organization/Company: Contractor

Name, Position:

Role/Responsibility Final ESCP of Record and Revised ESCP Preparer

Telephone Number:

Email:

1.4 NPDES Stormwater Permit

The 1200-CA NPDES Stormwater Permit is located in TAB 2.

1.5 ESCP Administrator

The General Contractor (section 1.2) is responsible for maintaining the project ESCP 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 ESCP of Record and prepare all documentation required by the project NPDES stormwater permit and ESCP.

The Erosion Control Supervisor (ECS) and erosion control team member(s) and their roles are identified in section 1.2 and his/her qualifications are documented in TAB 12.

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

All ESCP 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 FHWA/WFLHD Projects

The 1200-CA NPDES permit is located in TAB 2

State Permitting Authority

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.

Oregon DEQ authorizes FHWA/WFLHD projects under the programmatic 1200-CA permit.

https://www.oregon.gov/deq/wq/Documents/1200-CA-Permit.pdf

[5]

Section 2: Project Information

2.1 Project Name and Location

Project Name: OR FLAP POLK MITHCELL(1): Mitchell Street and

Black Rock Road Reconstruction

Project Site Location: Mitchell Street and Black Rock Road

City, County, State, Zip Code: Falls City, Polk County, OR 97344

Latitude/Longitude:

Eastern Endpoint: 44.87036, -123.45943

Western Endpoint: 44.86933, -123.44115

(decimal degrees)

The method used for determining latitude/longitude was: Other Website (Google Earth)

Township: Range: Section:

8 South 06 W 17

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:

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

Wetland delineation dated 02-05-2021 identified no wetlands in the project area.

Per FEMA FIRM website, no mapped 100-year floodplains are within the project area. There are no sensitive plant species within the area. See soil types below for erodibility information. There are relatively steep slopes (see plan sheets for details).

Also, see TAB 6

The method and location of discharge points or areas:

Stormwater runoff presently drains from the site by means of soil infiltration, sheet flow, and concentrated flows into adjacent roadside ditches.

Discharge points include existing culvert outlets, roadside ditches, and adjacent vegetated areas, ultimately discharging to the Little Luckiamute River and Dutch

Creek (tributary to the Little Luckiamute River).

[6]

Also see TAB 6

Soil type(s), erodibility rating, and drainage class are identified as:1

The June 2021 Geotechnical Report indicates that borings identified loose to medium dense silty sand, sandy silt with gravel in from 7.5 feet to 24.5 feet beneath the Road. Where the road is closets to and crosses the Little Luckiamute River cobbles, boulders, as well as soft lean clay were identified. Gabro bedrock was identified anywhere between 13 and 24.5 feet below the surface. The cliff face along the western portion of the projects extends through igneous bedrock interpreted as ferrogabbro.

Any past soil contamination at the site is identified as:

No past soil contamination.

Protected Natural Features (natural features include natural buffer zones [defined in the 1200-CA as the area within 50 feet of surface waters], trees, streams, wetlands, slopes, etc.):

Little Luckiamute River:

The Little Luckiamute River flows from the Central Oregon Coast Range near

Fanno Peak and joins the Luckiamute River about 4 miles (6 km) upstream of the

Sarah Helmick State Recreation Site southwest of Monmouth. Within the project area, the river bank consists of sections of steep forested bluffs and interior floodplains and associated riverine forests. The river parallels the roadway and crosses the road once at an old iron bridge. The river ranges between 30 to 50 feet wide at the OHWM through the project area. The river had a cobble-boulder bed with bedrock inclusions. The riparian zone was mostly intact with a few residences and the road as the main disturbances, including a rip rapped bank at the riverbend location.

Floodplains: Flood limits and elevations have been mapped by the National Flood

Insurance Program for the Little Luckiamute River near the site (FIRM FIS

41053C0355F, effective 12/19/2006). Immediately downstream of the site the stream is mapped as Zone A, a special flood hazard area subject to inundation by the 1 percent annual chance flood event with no base flood elevations determined. Upstream of the Zone A area, the stream is designated Zone X, areas determined to be outside the 0.2 percent annual chance floodplain. Polk County is the local floodplain administrator.

Measures to protect these features:

BMPs include, but are not limited to, fiber roll, silt fence, and check dams.

Construction fencing will be used to mark construction limits in areas with wetlands and streams that are not impacted by the project.

1 NRCS Web Soil Survey.

http://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx

[7]

Rainfall:

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

2 inches/day

2 Precipitation frequency for Western States http://www.wrcc.dri.edu/Climate/precip_freq_maps.php

[8]

Section 3: Nature of Construction Activity

3.1 General Description of Project and Scope of Work:

Describe proposed construction activities, including structures that are planned for demolition. Include types of fill material proposed for the project.

Include general type of project (i.e., highway construction, roadway realignment, highway and bridge reconstruction, etc.).

Identify waterbodies to be impacted by construction activities and describe work to occur in waterbodies:

The Western Federal Lands Highway Department (WFLHD) in partnership with Polk County, Falls City, and the U.S. Bureau of Land Management proposes to reconstruct an approximately one-mile section of the Mitchell Street and Black Rock Road located just west of Falls City, Oregon. The eastern portion of the road falls within Falls City city-limits and is called Mitchell

Street. The western portion of the road falls under the jurisdiction of Polk County and is called

Black Rock Road. Polk County and Falls City share roadway ownership and maintenance responsibilities. The current single lane bridge across the Little Luckiamute River is functionally obsolete requiring replacement. A two-lane bridge has been determined necessary to safely accommodate the mix of timber haul trucks and passenger vehicles. In addition, the current gravel road is a source of sediment delivery to the three waterways within the project area, and, consequently, presently requires restricting timber haul trucks from using the road during the rainy season. Lastly, the western portion of the road is substandard in terms of safely accommodating two-way traffic. The roadway will be converted from a wide single-lane gravel road with variable width shoulders to a two lane paved road with defined and consistent gravel shoulders to better meet current city and county standards. The existing single-lane bridge over the Little Luckiamute River will be replaced with a new two lane bridge.

No wetlands are present in the project construction area. Work within or adjacent to waters of the

U.S. and state will occur at three locations, as described below, with all in-water work being conducted during the ODFW approved in-water work window of July 1 to October 15.

Little Luckiamute River, River Bend:

Work at this location will result in unavoidable permanent and temporary encroachment within the OHW limits of the Little Luckiamute River. As described in the project alternatives analysis, considerable effort has been taken to limit this encroachment to the greatest extent practicable. A permanent rockery wall will be installed along the edge of the river bank to minimize encroachment to the area below OHW. At the base of the wall, bioengineered scour protection in the form of conserved streambed material will be placed along with cottonwood and willow plantings. Along this length of encroachment into the OHW limits, the current river bank is mostly comprised of large rip rap with almost no vegetative cover. Construction equipment will need to access the base of the proposed rockery wall and therefore some temporary construction activities will occur within the OHW limits. A work area isolation berm will be installed below

OHW to confine the work area from the actively flowing river. The berm will be constructed of sand bags, plastic sheeting, and potential jersey. Downstream (east) of the riverbend, the rockery wall construction will extend several hundred feet adjacent to the creek with some minor impacts below OHW limits in a narrow band of riparian forest (typically a single band of native trees with scattered shrubs and herbaceous vegetation) situated adjacent to

[9] the current roadbed. In a few locations, due to site constraints, the temporary work isolation berm will again need to occur within the OHW limits. It is anticipated that placement of the work isolation berm will occur in dry sections of the creek channel. However, where this is not feasible, fish salvage will occur in the isolated areas after installation of the isolation berm but prior to other construction at these locations.

Little Luckiamute River, Bridge Replacement:

The existing one-lane single span bridge will be replaced with a two-lane single span bridge. A single-span temporary work bridge will be placed along the north side of the existing bridge and will be located entirely above the OHW elevation. Existing bridge abutments will be removed and are located beyond the OHW limits. However, riprap associated with the existing bridge that extends below OHW will be removed to restore the natural channel cross-section. The new bridge abutments will also be outside of the OHW limits. Proposed riprap scour protection will be placed around the new bridge abutments but will be outside of the OHW limits. An erosion control/work isolation berm may be placed at the bank toe, potentially within the OHW limits since the steep banks may prevent proper erosion control measures to be placed directly along the banks. However, since work will be conducted during the dry season, no impacts to stream flow and associated fish passage will occur (i.e. the erosion control berms would likely be situated along the dry edges of the channel bottom). However, should a potential isolation berm result in isolated pools, fish salvage will take place prior to other construction activities at this location.

Unnamed Tributary to the Little Luckiamute River:

The existing 60 feet long, 24 inch diameter metal culvert will be replaced with a same sized culvert. Review by ODFW (Elise Kelly, ODFW District Biologist) confirmed that the stream does not provide habitat for native fish and therefore fish passage is not required. A riprap pad will be placed at the culvert outfall to reduce scour. The current outfall contains an eroded scour hole with highly embedded substrates.

The type or function of the project is: Road 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):

Contractor determined

NOTE: All Contractor-selected sources and support sites are the sole responsibility of the General

Contractor. The ESCP and NPDES permitting for Contractor-selected sites and sources are separate from this documentation (SCR 107.01A(g)).

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

Size of Project Area:

(Including all Government-selected support sites such as staging, borrow, waste, access roads, affected downstream area, noise perimeter, extent of light effects, etc.)

[10]

Estimated Area Units

Total length of project for linear projects 1 Miles (measure to the ¼ mile)

Total project area: 8.25 Acres (measure to the ¼ acre)

Disturbed project area: 5.75 Acres (measure to the ¼ acre)

Total disturbed acreage expected at any one time 8.25 Acres (measure to the ¼ acre)

3.2 Sequence and Estimated Dates of Construction Activities

The intended construction sequencing and timing of major construction activities is detailed here, including the phased grading and stabilization activities used to minimize overall amount of disturbed soil.

Contractor and PE

Note: Fill in for all proposed phases and ensure that each phase described below has separate erosion and sediment control plans. At a minimum there should be two (2) phases .

Phase:

Construction sequence description:

Start date and duration of sequence (include dates of temporary or final stabilization):

BMPs associated with this sequence:

Stabilization measures

(include dates of installation and temporary

BMP removal):

Click here to enter text.

Click here to enter text. Click here to enter text. Click here to enter text.

sequence description:

Start date and duration of sequence (include dates of temporary or final stabilization):

BMPs associated with this sequence:

Stabilization measures

(include dates of installation and temporary

BMP removal):

Click here to enter

[11] sequence description:

Start date and duration of sequence (include dates of temporary or final stabilization):

BMPs associated with this sequence:

Stabilization measures

(include dates of installation and temporary

BMP removal):

Click here to enter sequence description:

Start date and duration of sequence (include dates of temporary or final stabilization):

BMPs associated with this sequence:

Stabilization measures

(include dates of installation and temporary

BMP removal):

Click here to enter

[12]

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.

S e le c te d A c ti v it y

X

Construction Activity

Potential Construction Site Pollutants

S e d im e n t

N u tr ie n ts

B a c te ri a p H

O il

G r ea se

T ra sh

D b r is

P st ic id e s

H ea v y

M e ta ls

O th r

P o ll u ta n ts

Clearing, excavating, and grading X X

Fill of roadway embankment, backfill at structures X X

Vehicle/equipment fueling and maintenance X X X

Vehicle/equipment use and storage X X

Sanitary/septic waste X X

Dewatering operations X X

Drilling and blasting operations X X X

Concrete washout and waste X X

Structure construction/painting/cleaning X X X X

Demolition and debris disposal X X X X X

Solid waste (trash and debris) X X

Hazardous waste or contaminated spills X X X

Paving operations X X

Landscaping operations X X X

Mining, rock extraction, crushing X X X

Contractor and PE

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

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

Material Storage Location

[13]

Section 4: Site Maps

Include vicinity maps in TAB 5.

Include site maps and erosion and sediment control plan maps for each phase of construction in

TAB 6.

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

Location

Multi-Sector General Permit

Number (if applicable)

1. N/A

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)

Potential Non-Stormwater Discharges

Control Measures

To be completed by contractor

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 and discharged to upland with no potential to discharge to surface waters)

Ground water or spring water (non-turbid and 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

[14]

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

TAB 6

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

1. Little Luckiamute River

2. Unnamed Tributary to the Little Luckiamute River

Impaired Waters/TMDLs: Include all 303(d) category 4 and 5 impaired waters

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

Is this surface water listed as

“impaired?”

What pollutant(s) is causing the impairment?

Has a TMDL been completed?

Pollutant(s) for which there is a TDML

1. Yes No Little Luckiamute River is 303d listed for temperature

Yes No

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

Oregon DEQ Integrated Report consulted on 1-12-2023

(https://www.oregon.gov/deq/wq/Pages/epaApprovedIR.aspx).

If applicable, documentation of consultation with State TMDL authorities on consistency of

ESCP 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 approved TMDL, including any specific waste-load allocations are included in that documentation.

5.3 Water Quality Monitoring Requirements

Provisions in Permit Conditions of the applicable NPDES stormwater permit, define additional monitoring and reporting requirements. Details about water quality monitoring and reporting requirements applicable to this project are included in TAB 11. 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.

Are engineered soils proposed for use on the project? No

[15]

If yes, follow requirements in SCRs 107 and 157 and Section 17.6 of the 1200-CA. pH monitoring is required in discharges from sediment basins when engineered soils are used on the project.

Section 6: 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 ESCP 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. Avoid 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.

6.1 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 TAB 6.

The following perimeter controls will be implemented:

Measure: Fiber Roll

Implementation:

Install all sediment perimeter control measures prior to clearing, grubbing, and grading activities.

Install additional erosion and sediment control measures as needed during construction.

Maintenance:

[16]

Maintain the functionality of erosion and sediment control measures, and clean measures that are one-third full of sediment, until final acceptance or until disturbed sites are stabilized according to the CO. Remove and dispose accumulated sediment according to Subsection 204.14.

Measure: Silt Fence

Install all sediment perimeter control measures prior to clearing, grubbing, and grading activities.

Install additional erosion and sediment control measures as needed during construction.

Maintenance:

Maintain the functionality of erosion and sediment control measures, and clean measures that are

Note: Add additional measures used during construction.

6.2 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 by the end of the same business day after discovery.

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

☒ Not applicable to this project.

Reason: The current roadway is gravel, and except for the bridge, there are currently no paved surfaces within the project area.

If applicable:

Measure: Stabilized construction entrances

Implementation: Installed as needed

Maintenance: Rock, gravel added as needed.

6.3 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 natural buffers and drainages including storm sewer inlets and culvert inlets.

[17]

Stabilize or cover stockpiles at the end of the workday and before extended breaks in construction if a storm event is forecasted that may result in discharge from the site or if wind speeds greater than 10 mph are forecasted. Locations of stockpiles are shown on the erosion and sediment control plan sheets in TAB 6.

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

If applicable:

Measure: Plastic Sheeting

Implementation:

Soil stockpiles and other erodible materials should be covered by plastic as soon as they are generated.

Maintenance:

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

You are prohibited from hosing down or sweeping soil or sediment accumulated on pavement or other impervious surfaces into any constructed or natural site drainage feature, storm drain inlet, or water of the U.S.

6.4 Minimize Dust

Dust control includes practices used to reduce or prevent the surface and air transport of dust during construction. Cover all sediment loads leaving the site and when trucking saturated soils from the site, use water-tight trucks or drain loads on site.

Measure: Water Application

Implementation: Apply minimum amount of water for dust control, as needed

Maintenance: As needed, use during construction

6.5 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.

[18]

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.

Measure: Tackifiers

Implementation:

Apply turf establishment to finished slopes and ditches between September 1 and October 15, of any year.

Maintenance:

Do not apply turf establishment during windy weather or when the ground is excessively wet, frozen, snow covered, extremely dry, cloddy, hard pan, or not friable. Decompact soils by scarifying the soil surface of roads and paths, stream crossings, staging, and stock pile areas.

Measure: Erosion Control Blanket

Implementation: Install erosion control blankets (rolled erosion control product) where indicated in the plan set (Erosion Control section).

Maintenance: Avoid damaging erosion control blankets once installed and repair damaged areas immediately by restoring soil to finished grade and replacing the erosion control blankets as needed.

6.6 Topsoil Conservation

Describe how topsoil will be preserved, if feasible. If conservation of topsoil is infeasible, explain why, and describe alternate methods to be used to insure optimum vegetation survival and growth.

Erosion and sediment control measures for topsoil stockpiles (and other erodible materials) are shown in section 4.4.

☐ Conservation of topsoil is Infeasible:

Reason: Click here to enter text.

Alternate method: Click here to enter text.

☒ Conservation of topsoil is Feasible:

Measure: Conserve Topsoil

[19]

Topsoil will be conserved to the greatest extent possible for on site re-use

Conserve topsoil by using proper perimeter controls. Avoid compacting during placement.

Protect conserved topsoil from weed contamination and from erosion by covering conserved topsoil stockpiles.

6.7 Minimize Soil Compaction

Minimize soil compaction in areas where final vegetative stabilization will occur and where infiltration practices will be installed.

Measure: Scarifying of over-compacted topsoil

Implementation:

Over-compacted Topsoil will be loosened to a depth of 2 inches by raking or tilling. Soil moisture will be monitored, and adjusted if necessary, so that specified compaction is achieved.

Contractor will use extreme care to avoid over-compaction of topsoil

6.8 Storm Drain Inlets and Culvert Inlets

Applicable for stormwater drain inlets which are connected to separate storm sewer systems

(usually in urban locations) AND for culvert inlets that discharge stormwater from the project into surface waters.

Remove accumulated sediment adjacent to inlet protection measures by the end of the same day it is identified, or by the end of the following day if removal the same day is not feasible.

Locations and design specifications of BMPs are shown on the erosion and sediment control plan

The following BMPs are applicable to:

☐ Storm Drain Inlets

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☒ Culvert Inlets

Measure: Fiber Roll

Install all sediment perimeter control measures prior to clearing, grubbing, and grading activities.

Install additional erosion and sediment control measures as needed during construction.

Maintenance:

Maintain the functionality of erosion and sediment control measures, and clean measures that are

6.9 Constructed Stormwater Conveyance Channels and Culvert Outlets

Describe velocity dissipation and/or erosion control devices to be installed at stormwater conveyance channels (such as roadside ditches) and culvert outlets. Includes permanent and temporary devices (specify).

Velocity dissipation devices will be placed at discharge locations and along the length of any outfall channel to provide a non-erosive flow velocity from the structure to a water course so that the natural physical and biological characteristics and functions are maintained and protected

(e.g., no significant changes in the hydrological regime of the receiving water).

Locations and design specifications of BMPs are shown on the erosion and sediment control plan

☐ Not applicable to this project.

Measure: Check Dams

Implementation:

Construct temporary check dams to reduce the velocity of runoff in ditches and swales as shown in ESCP sheets

Maintenance:

Maintain the functionality of erosion and sediment control measures, and clean measures that are

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6.10 Sediment Basins

If applicable, provide site design specifications and other details for design of sediment basins and ponds. This may also include sediment infiltration swales. If an engineered sediment basin or similar impoundment is installed, follow the requirements of the 1200-CA. Include design storm method and calculations used to design the sediment basin.

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

At a minimum, sediment ponds must provide storage for either the calculated volume of runoff from the 2-year, 24-hour storm event or 3,600 cubic feet per acre drained. Sediment ponds must also use outlet structures that withdraw water from the surface, unless infeasible.

☒ Not applicable to this project.

If applicable, type of sediment retention/infiltration used: Click here to enter text.

Design description: Click here to enter text.

6.11 Chemical Treatment

If chemical sediment control (such as polymers) will be used, provide design specifications and other details considered when choosing treatment type and locations.

☒ Not applicable to this project.

NOTE: If use of cationic treatment chemicals is planned, separate prior approval is required.

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

Describe/name treatment chemicals that will be used and why these chemicals are suited to site soil characteristics and other construction site conditions: Click here to enter text.

Describe treatment system specifications and dosage of chemicals to be used: Click here to enter text.

Describe storage of chemicals and other material safety data: Click here to enter text.

Special controls to be used for Cationic treatment chemicals: Click here to enter text.

Describe training that personnel handling/applying treatment chemicals have/will receive: Click here to enter text.

6.12 Dewatering Practices

Discharge of ground water or accumulated stormwater that is removed from excavations, trenches, foundations, etc. into surface waters is prohibited unless such waters are first

[22] effectively managed by appropriate sediment controls. Uncontaminated non-turbid dewatering water can be discharge without being routed to a control.

☐ Not applicable to this project

Measure: Pump water from dewatered areas to upland vegetated areas to permit treatment through infiltration

Implementation: As needed.

Maintenance: Inspect pumps daily to ensure proper functioning order and no links

6.13 Erosion Control and Stabilization

Commence temporary soil stabilization measures immediately if no further disturbance of an area of the site or stockpile is expected within the next 14 days. Complete temporary soil stabilization measures to disturbed sites or stockpiles as soon as practicable, but no later than 7 days of last disturbance.

Provide for temporary stabilization of all exposed soil prior to winter construction shut down. Specify whether stabilization measure is temporary or permanent.

☒ Temporary Measures:

Measure: Seeding and Mulching

Implementation:

Apply hydro mulch as recommended by the seeding company at a rate of 1000 pounds per

ACRE upon completion of seeding. This rate does not apply to mulch for tracer applied under

Subsection 625.07(b), Seeding, Hydraulic Method. Plant seed according to the plant mix noted in

Section 713.04 with ground cover not to exceed 1/4-inch. Apply the seed at the rate of 43.5 pounds of live seed per ACRE.

Maintenance:

Temporary seed and mulch will be applied at rates per plans. Commence temporary soil stabilization measures immediately if no further disturbance of an area of the site or stockpile is expected within the next 14 days. Complete the installation of temporary or permanent soil stabilization measures to disturbed sites or stockpiles within 7 days of last disturbance. Provide for temporary stabilization of all exposed soil prior to winter construction shut down.

Note: Add additional measures used during construction. If using seed, provide composition of seed mix and other plant types used to establish temporary cover.

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☒ Permanent Measures:

Measure: Seeding and Mulching

Implementation:

Apply hydro mulch as recommended by the seeding company at a rate of 1000 pounds per

ACRE upon completion of seeding. This rate does not apply to mulch for tracer applied under

Subsection 625.07(b), Seeding, Hydraulic Method. Plant seed according to the plant mix noted in

Section 713.04 with ground cover not to exceed 1/4-inch. Apply the seed at the rate of 43.5 pounds of live seed per ACRE.

Maintenance:

Temporary seed and mulch will be applied at rates per plans. Commence temporary soil stabilization measures immediately if no further disturbance of an area of the site or stockpile is expected within the next 14 days. Complete the installation of temporary or permanent soil stabilization measures to disturbed sites or stockpiles within 7 days of last disturbance. Provide for temporary stabilization of all exposed soil prior to winter construction shut down.

Measure: Erosion Control Blanket

Implementation: Install erosion control blankets (rolled erosion control product) where indicated in the plan set (Erosion Control section).

Maintenance: Avoid damaging erosion control blankets once installed and repair damaged areas immediately by restoring soil to finished grade and replacing the erosion control blankets as needed.

Measure: Riprap Ditches and Riprap at Culvert Outlet Protection

Implementation: Install riprap in ditches and at culvert outlets as shown in the plan set.

Maintenance: Loose rock should be replaced. Inspections should occur monthly and after each major rainfall event during construction activities.

6.14 Removal of BMPs

Remove erosion and sediment control BMPs that are no longer needed and leave in good working order those BMPs that will remain at the construction site after close-out.

BMPs are no longer needed when the site that the BMP is protecting has reached final stabilization.

Final stabilization means:

• All ground disturbing activities at the site have been completed, AND

• Vegetation has been established that provides a uniform perennial vegetative cover with a density of 70% of the natural vegetative cover prior to construction.

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• For sites where it is difficult to establish 70 percent coverage (e.g., arid, semiarid or drought-stricken areas), the registrant must cover exposed soil between planted or seeded areas with bio or photo degradable controls designed to prevent erosion without active maintenance or propose a site-specific plan to DEQ for approval. Document arid/semi-arid conditions in ESCP

• Effective non-vegetative stabilization is in-place such as rip rap, gabions, geotextiles, rock, aggregate etc.

6.15 Post Construction Measures

Responsibility for NPDES permit compliance after construction close-out will be the responsibility of:

☒ FHWA/WFLHD

☒ Land Management/Owner Agency Specify Agency: Choose an item.

☐ County/State DOT

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Section 7: Operational Controls/Good Housekeeping Measures

7.1 Spill Prevention, Control and Countermeasure Plan

Spills and potential stormwater contamination will be controlled to reduce the chance of spills, stop the source of spills, contain and clean up spills, and dispose of materials contaminated by spills.

Spill prevention and response actions are outlined in the Spill Prevention, Control, and

Countermeasure Plan (SPCC), TAB 15.

Implementation: Prior to construction activities and throughout construction.

7.2 Spills/Releases in Excess of Reportable Quantities

This permit does not provide authorization to discharge hazardous substances or oil resulting from an on-site spill. This permit does not provide relief from the federal reporting requirements of 40 CFR Part 110, 40 CFR Part 117 and 40 CFR Part 302 relating to spills or other releases of oils or hazardous substances.

For a release containing a hazardous substance or oil in an amount equal to or in excess of a reportable quantity established under either 40 CFR Part 110, 40 CFR Part 117 or 40 CFR Part

302, occurs during a 24-hour period:

• Notice will be provided to the National Response Center (800–424–8802) in accordance with the requirements of 40 CFR Part 110, 40 CFR Part 117 and 40 CFR Part 302 as soon as site staff have knowledge of the discharge; and written notice will be provided within

7 calendar days of knowledge of the release, provide a description of the release, the circumstances leading to the release, and the date of a release.

• Notify Oregon Emergency Response System at (800) 452-0311 of spills or discharges containing hazardous substance or oil.

• Measures to prevent the reoccurrence of such releases will be implemented.

7.3 Equipment/Vehicle Fueling and Maintenance Practices

On-site fueling areas will have a spill kit present, visible, and maintained. Employees and subcontractors will receive training regarding equipment/vehicle fueling and maintenance practices, including proper fueling procedures, proper use of pumps, emergency shutoff valves

(training efforts documented in TAB 12).

On-site vehicles and equipment will be inspected daily for leaks, equipment damage, and other service problems.

Designate vehicle/equipment service will be marked and the areas will be located away from drainage facilities and watercourses to prevent stormwater run-on and runoff. Designated washout areas will be shown on the ESCP plan sheets (TAB 6).

Drip pans, drip cloths, or absorbent pads will be used when replacing spent fluids. All spent fluids will be collected and store in appropriate labeled containers in the proper storage areas.

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7.4 Equipment/Vehicle Washing

Equipment/vehicle washing and allowable non-stormwater will be controlled using procedures and practices include using off-site facilities; washing in designated, contained areas only;

eliminating discharges to the storm drain by infiltrating the wash water or routing to the sanitary sewer. The locations of equipment/vehicle washing areas, storm drains, tributary drainage areas, and surface waterbodies on or near the site are shown and updated on the ESCP plan sheets

(TAB 6).

Implementation: Prior to construction activities and throughout construction.

7.5 Material Handling and Waste Management

Measures will be put in place and maintained to prevent the discharge of solid materials to receiving waters, except as authorized by a permit issued under the §404 permit.

• Designated trash and bulk waste-collection areas on-site (location of areas are shown and updated on plan sheets, TAB 6). Keep waste container lids closed when not in use and close lid at the end of the business day. For waste containers that do not have lids, provide a cover (e.g., tarp, plastic sheeting) to prevent exposure to precipitation.

• Litter and debris from the construction will be cleaned up on a daily basis.

• Waste-collection areas will be located away from streets, gutters, watercourses, and storm drains. Secondary containment around waste collection areas will be implemented if needed to further minimize the likelihood of contaminated discharges.

• Portable restrooms will be located away from streets, gutters, watercourses, and storm drains (location of areas are shown and updated on plan sheets, TAB 6). Secondary containment around waste collection areas will be implemented if needed to further minimize the likelihood of contaminated discharges.

• Portable restrooms will have tie-downs or stake downs in areas of high winds or susceptibility to vandalism.

• Hazardous waste-collection areas will be designated on-site (location of areas are shown and updated on plan sheets, TAB 6). Secondary containment around waste collection areas will be implemented if needed to further minimize the likelihood of contaminated discharges.

• Hazardous waste containers will be routinely inspected to ensure that all containers are labeled properly and that no leaks are present.

Implementation: Throughout construction.

7.6 Designate Concrete Washout Areas

Concrete washout areas on-site, designate specific washout areas, and design facilities to handle anticipated washout water will be installed. Washout areas will also be provided for paint and stucco operations as applicable. Washout areas will be located at least 50 yards away from storm drains and watercourses. If this is not possible, prefabricated washout containers will be used.

Alternatively, constructed washout areas may be used either by digging a pit and lining it with 10

[27] mil plastic sheeting or creating an aboveground structure from straw bales or sandbags with a plastic liner. Designate washout areas will be shown on the erosion control plan sheets (TAB 6).

☒ Not applicable to this project

The following precautions will be implemented:

• Concrete trucks or equipment will not be washed out into storm drains, streets, gutters, uncontained areas, or any watercourses.

• Washout areas will be established prior to commencing the activity and their locations advertise with signs or delineators.

• Concrete wastewater must be directed into an impermeable-lined pit or leak-proof container sufficiently sized to avoid overflows.

• Washout structures will be routinely inspected to detect leaks or tears and to identify when materials need to be removed.

• Materials will be disposed of properly (for example, allow the water to evaporate and to recycle the hardened concrete).

• Inspections will include looking for evidence that contractors are using the washout areas and not dumping materials onto the ground or into drainage facilities. If the washout areas are not being used regularly, additional signage will be posted or the facility will be relocated to a more convenient location.

• Employees and subcontractors will receive training regarding designated washout areas, including proper handling and storage practices (training efforts documented in TAB 12).

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Section 8: INSPECTIONS

8.1 Inspection Frequency

Inspections will be conducted in accordance with the following schedule(s):

Inspect all erosion and sediment control measures once every 14 days and within 24 hours of a storm event that results in discharge from the site, and/or when there is runoff from snowmelt sufficient to cause a discharge.

Inspection frequency may be reduced in accordance with the 1200-CA permit and SCR 157.14.

Inspections will be conducted by qualified personnel as required in SCR Section 157. Inspector qualifications are documented in TAB 12.

The WFL Inspection Report template will be used for all inspections. All completed Inspection

Reports will be signed in accordance with the 1200-CA and SCR 107.01A.

Completed Inspection Reports are filed in TAB 9.

8.2 Corrective Actions

Corrective action is required for the following reasons and as stated in the 1200-CA:

(a) Discharges are causing an exceedance of water quality standards or there is visible turbidity in surface waters or a conveyance system leading to surface waters.

(b) An erosion and sediment control device necessary to comply with the 1200-CA was not installed or installed incorrectly.

(c…