ESCP OR WALLOWA 4602(1).pdf

Erosion and Sediment Control Plan

ESCP

For:

Wallowa Mountain Loop Road Reconstruction

OR Wallowa 4602(1) Wallowa County, OR

Federal Highway Administration, Western Federal Lands Highway Division

Project Engineer: _________ _

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

T able o f C ontents

Table ofContents

. SWPPP/ESCP TABS

TAB 1: SWPPP/ESCP Narrative

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

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

TAB 4: Delegation of Authority

TABS: Maps

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

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

TAB 8: SWPPP Amendment Log

TAB 9: Erosion/Sediment Control Inspection Reports and Requirements

TAB 10: Corrective Action Log

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

TAB 12: Training Log

TAB 13: Waste and/or Borrow Site Information

TAB 14: Grading and Stabjlization 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)

Oregon: Erosion and Sediment Control Plan (ESCP)

For Construction Activities at:

Project Name:

Project Site Location:

City, County, State, Zip Code:

ESCP Prepared for:

Organization Name:

Address:

Telephone Number:

ESCP Prepared by:

Name, Title:

Company/Organization:

Address:

Telephone Number:

1 Wallowa Mountain Loop Road Reconstruction (OR Wallowa 4602(1))

Joseph, OR

1 Wallowa County, OR

FHWA, Western Federal Lands Highway Division (WFLHD)

610 East Fifth Street

Vancouver, WA 98661-3801

360-619-7700

Denise Steele, Environmental Protection Specialist

FHWA, Western Federal Lands Highway Division

610 East Fifth Street

Vancouver, WA 98661-3801

• 360-619-7593

ESCP Preparation Date: 7/10/2018

Estimated Construction Start Date: April 1, 2019 Estimated Construction Completion Date: October 7, 2019

Estimated Revegetation Start Date: June 11, 2019 Estimated Revegetation Completion Date: July 15, 2020

TAB 1:

TAB2:

TAB3:

TAB4:

TABS:

TAB6:

TAB7:

TABS:

TAB9:

TAB 10:

TAB 11:

TAB 12:

TAB 13:

TAB 14:

TAB 15:

TAB 16:

TAB 17:

TAB 18:

ESCP T ABs (ESCP Inclusions)

ESCP/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)

ESCP 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)

TAB 1:

ESCP/ESCP NARRATIVE

Table of Contents

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 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 S~il Compaction

7.9 Storm Drain Inlets and Culvert Inlets

7.10 Constructed Stormwater Conveyance Channels and Culvert Outlets

7.11 Sediment Basins •............••..•.......•.•............................•...•.•....•...•.•.•.•...•...•.......•...•.•.•.•.•..•...........••.. 28

7.12 Chemical Treatment ....•.............•...................•...•......•.•.•..•...•.....•.•...•.•...•.•.....•.•..•..•...............•••... 29

7.13 Dewatering Practices ..•..........•.•.•.•••.•...•......•..•.•...•.................••..•.•.•.•.•.•......••...•.•...•.•..•.•.•.......••••.. 29

7.14 Erosion Control and Stabilization

7.15 Removal of BMPs .....•.....•.•..•..•....•.•.•...•.•..•...••.•.....................•.•.•...•.•.....•..••.....•...•...•.•..•.•........••... 31

7.16 Post Construction Measures ....•.......•..•...•........•..•....••.•........••.........••...•........................•.........••... 31

SECTION 8: OPERATIONAL CONTROLS/GOOD HOUSEKEEPING MEASURES

8.1

8.2

8.3

8.4

8.5

8.6

Hazardous Spill Plan .•.........•.....•..........•..........••.•...•...........................•.........•.........•.•..•••........••••.. 32

Spills/Releases in Excess of Reportable Quantities

EquipmentN ehicle Fueling and Maintenance Practices

EquipmentN chicle Washing ..........................•.•....•.•.•.••.•..•.•...•....•........•.•.•...•...............•

Material Handling and Waste Management

Designate Concrete Washout Areas

SECTION 9: INSPECTIONS ••.•...•.•.••..••..••.•••..•.•..•.•...••.....••.......•.•.•.....•...•...•...•.•••...•••••••....••••• 35

9 .1 Inspection Frequency ..•...•.•.•....•.•.•......•.•..•.•...•........•...................................•...•...•...•..•.•.•.......•••••. 35

9.2 Corrective Actions .•.•.•..•...•...•.•.••...•....................................•.........•.........•...•.....•.•.•.•.•.••.•..•.......•... 36

SECTION 10: DELEGATIONS OF AUTHORITY .••....•..•.......•.•..••...•...•...••..........•....••.....•••• 37

SECTION 11: STAFF TRAINING •.•.••...•...•.••.••••.•••••••••••••.•.•••••••.•.•••.••••••.•..•....•.....•••...•.....••••• 38

SECTION 12: CERTIFICATION AND NOTIFICATION

[ii]

Section 1: Responsible Parties/Contact Information

1.1 Operator(s):

Organization Name:

Address:

Telephone Number:

Contractor and PE

FHWA, Western Federal Lands Highway Division 610 East Fifth Street Vancouver, WA 98661-3801 360-619-7700

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

1.2 Construction Site ESCP Contact(s):

FHWA Contact Name: TBD

Title: Project Engineer

Address:

Telephone Number:

General Contractor, TBD Company:

( complete for all States) Erosion Control TBD Supervisor Name:

( complete for all States)

• Address:

Telephone Number:

1.3 ESCP Prepared by:

Organization/Company:

Name, Position:

Role/Responsibility

· Telephone Number:

Email:

Denise Steele, Environmental Protection Specialist ESCP Preparer 360-619-7593 denise.steele@dot.gov

1.4 NPDES Stormwater Permit

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

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

[I] 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) is identified in section 1.2 and his/her qualifications are documented in TAB 12.

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 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 FHW A PE.

1.6 Permitting Authority for FHW A/WFLHD Projects

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

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

Oregon Department of Environmental Quality (ODEQ)

State Permittin2 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 FHW A/WFLHD projects under the programmatic 1200-CA permit, ( expired in 12/31/2005, administratively extended)

[2]

Section 2: Project Information

2.1 Project Name and Location

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

Project Name: Wallowa Mountain Loop Road Reconstruction

(OR Wallowa 4602(1))

Project Site Location: Joseph, OR

City, County, State, Zip Code:

Wallowa County, OR

Latitude/Longitude:

Start: 45.340492°, -117.074783°

End: 45.271089°, -117.089619°

Township, Range, Section:

Start: S33, T2S, R46E

End:S29, T3S,R46E

The method used for determining latitude/longitude was: Google Earth

Is the project located in Indian country? No

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

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:

[3]

The Study Area, referred to herein, is a 78.6-acre section of Wallowa County, Oregon near the community of Joseph. It is comprised of approximately five miles of the Wallowa Mountain Loop Road (maintained by Wallowa County) and a 50 foot buffer from the existing pavement edge. The Study Area follows the road from its intersection with OR 350 south to the Wallowa-Whitman National Forest boundary. Within the Study Area, the Wallowa Mountain Loop Road traverses lower hill slopes and the valley bottom of Little Sheep Creek.

Wetland Summary

Twenty-five freshwater wetlands totaling 4.8 acres were mapped in the Study Area.

The condition of wetlands across the Study Area is fairly uniform in terms of hydrology, vegetation, and soils. Select wetland attributes, including wetland coverages, Cowardin classifications, and hydrogeomorphic (HGM) classifications, are included in Table A. The vast majority of wetlands are fed by groundwater emergences that rise along the toe slope of the roadway corridor. Nearly all of these slope wetlands are located on the west side of the roadway along the valley bottom of Little Sheep Creek. The roadway prism and fill typically form the upslope boundary of these slope wetlands. Several slope wetlands host a minor riverine hydrology component where overbank flooding intermittently augments wetland hydrology.

Emergent wetlands are dominated by introduced pasture grasses and forbs.

Dominant species include Kentucky bluegrass (Alopecurus pratensis), meadow foxtail (Alopecurus pratensis), bentgrass species (Agrostis capillaris & A.

gigantea), Canada thistle (Cirsium arvense) and common dandelion (Taraxacum officinale). Orchard grass (Dactylis glomerata) and smooth brome (Bromus inermis) become more common on drier sites and along wetland boundaries.

Vegetation is influenced, in part, by cattle grazing that occurs in most Study Area wetlands. Road sides are weedy and grazed areas are more dominated by pasture grasses and host weedy forbs. These sites tend to host cheatgrass (Bromus tectorum), common mullein (Verbascum thapsus), oxeye daisy (Leucanthemum vulgare ), bull thistle ( Cirsium vulgare ), and common houndstongue ( Cynoglossum officinale). Rocky sites such as lithosol areas and cliff faces are intermittent along the east side (cut-slope) of the Study Area corridor and feature a distinct mix of plants dominated by herbaceous species including round-leaf alumroot (Heuchera cylindrica), small-flowered blue-eyed Mary (Collinsia parviflora), spear-leaf sedum (Sedum lanceolatum ), woodland star (Lithophragma parviflorum) and fragile fem (Cystopteris fragilis). Forested portions of wetlands are generally limited to wetland boundaries, although Engelmann spruce occurs in scattered pockets. Forested understories are shaded and tend to feature lower cover of herbaceous species.

Soils sampled along wetland boundaries are often dark (1 OYR 2/1) and silt loam textures are dominant. Wetland soils featured moderately bright redoximorphic features in the form of concentrations in the matrix and pore linings. Redox Dark Surface (F6) was the most common Hydric Soil indicator utilized. Lenses of coarse material (sands and gravels) reveal former traces of stream channels and were commonly encountered near the present course of Little Sheep Creek and lesser

[4] waterways. Coarse angular gravels are intermittently encountered and are likely derived from colluvium and coarse fill material laid during the roadway construction.

W_0l PSS Riverine 0.069

W_02 PEM Slope 0.003

W_03 PSS Slope 0.110

W_04 PSS Slope 0.477 w_o5 PSS Slope 0.646

W_06 PSS Slope 0.271

W_07 PSS Slope 0.036

W_08 PSS Slope 0.182

W_09 PEM Slope 0.528

W_I0 PSS Slope 0.049

W_ll PSS Slope 0.372

W 12 PSS Slope 0.438

W_l3 PSS Slope 0.080

W_14 PSS Slope 0.058

W_l5 PSS Slope 0.065

W_16 PSS Slope 0.048

W_17 PSS Slope 0.042

W_18 PSS Slope 0.062

W_l9 PSS Slope 0.039

W_20 PSS Slope 0.023

W_21 PSS Slope 0.009

W_22 PSS Slope 0.038

W_23 PSS Slope 0.o38

W_24 PSS Slope 0.026

W_25 PSS Slope 1.121

Total Wetland Area 4.831

Waterway Summary

Roadside Ditches

Eleven roadside ditches were mapped in the Study Area. The typical roadside ditch in the study area is a narrow (~4'), linear feature that harbors a channel exhibiting physical characteristics (i.e. OHWM) that indicate that at some point in the year water is present. Soils in these features are rocky and often absent of significant fines. All Stud Area ditches are believed to be e hemeral and flows are redicted

[5] to be absent following periods with no precipitation or snowmelt. Ditches D _ 06 and D _ 08 appear to be augmented by groundwater emergences along the road corridor cut-slope.

Waterways

Ordinary high water mark (OHWM) determinations were made by locating and mapping the upland limit of physical and biological characteristics outlined in Army Corps of Engineers Regulatory Guidance Letter 05-05 (USA CE 2005).

Seasonality determinations for waterways are based on preliminary Best Professional Judgment (BPJ) assessments, and rely on an assessment of observed flows, recent precipitation, and consideration of the stream reach position in the drainage. Hydraulics analyses note that Little Sheep Creek maintains stable banks and consists of a dominant pool-riffle bed form comprised of a gravel-cobble stream bed.

Ten natural stream courses are present in Study Area, including the perennial waterway Little Sheep Creek (WW_ 01 ). The Study Area overlaps with the channel of Little Sheep Creek in numerous locations. Little Sheep Creek is mapped as Essential Salmonid Habitat (DSL 2015). Two dead steelhead were observed along the banks of the waterway during the biological resource survey conducted in May 2017. One fish was marked with a clipped adipose fin and holes punched in the gill plates and is likely a "recycled" hatchery fish from the Oregon Department of Fish and Wildlife Little Sheep Creek facility. The second fish had been partially eaten;

roe was visible, however the state of the carcass did not allow examination of the adipose fin. Unnamed waterways WW_ 09 and WW_ 10 are believed to harbor intermittent flows, and likely feature base flows extending into all but the driest portions of the year. The balance of Study Area waterways are presumed to be ephemeral with flows present only following periods of precipitation or snow melt.

Select attributes from Study Area Waterways are included in Table B.

D_Ol Ditch Ephemeral 0.004

0_02 Ditch Ephemeral 0.020

0_03 Ditch Ephemeral 0.043

0_04 Ditch Ephemeral 0.024

0_05 Ditch Ephemeral 0.021

0_06 Ditch Ephemeral 0.004

D_07 Ditch Ephemeral 0.004

0_08 Ditch Ephemeral 0.009

0_09 Ditch Ephemeral 0.009

D_IO Ditch Ephemeral 0.011

D_ll Ditch Ephemeral 0.005

[6]

Little Sheep Creek; area includes WW_0I Waterway Perennial numerous segments 1.548

Seasonal high water channel of WW_0I Waterway Ephemeral Little Sheep Creek 0.002

Seasonal high water channel of WW_0I Waterway Ephemeral Little Sheep Creek 0.006

WW_02 Waterway Ephemeral 0.005

WW_03 Waterway Ephemeral 0.005

WW_04 Waterway Ephemeral 0.005

WW_05 Waterway Ephemeral 0.010

WW_06 Waterway Ephemeral 0.004

WW_07 Waterway Ephemeral 0.003

WW_08 Waterway Ephemeral 0.013

WW_09 Waterway Intermittent 0.010

Channel eventually Fades into WW_I0 Waterway Intermittent Wetland 25 0.097

Total Waterway Area 1.865

Field investigation identified 4.83 acres of wetland in the Study Area. Additionally,

1.86 acres of non-wetland waters including waterways and roadside ditches were identified, 1.55 acres of which are the Study Area intersections with Little Sheep Creek.

Also, see TAB 6

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

· Also, see TAB 6

The location of discharge points or areas

All stormwater presently drains into adjacent vegetated buffers.

• Also see TAB 6

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

TABs 5 and 6.

Critical slopes and slope lengths include:

SLIDO: Statewide Landslide Information Layer for Oregon shows no mapped landslide date on this stretch of roadway.

[7]

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

Site-specific AOI yielded two different map units for this project. Each unit of the AOI is approximated below.

Map Unit Map Unit Name Acres In Percent of Symbol AOI AOI 11 Anatone-Bocker-Fivebit complex, 30 to 51.6 5.3%

60 percent south slopes 29 Btree-Flycreek complex, 15 to 30 8.8 0.9% percent north slopes 30 Btree-Flycreek complex, 30 to 60 44.7 4.6% percent north slopes 32 Btree-Flycreek-Anatone complex, 60 to 61.4 6.3%

90 percent north slopes 47 Cheval silt loam, 0 to 2 percent slopes 146.6 15.2% 82 Freels silt loam, 0 to 3 percent slopes 7.2 0.7% 88 Getaway-Anatone-Rock outcrop l.2 0.1% complex, 60 to 90 percent slopes 92 Getaway-linecreek-Anatone complex, 41.3 4.3%

30 to 60 percent slopes 108 Hapludolls-Endoaquolls-Endoaquents 293.6 30.4% complex, 0 to 5 percent slopes 110 Harl-Anatone-Rock outcrop complex, 0.0 0.0%

60 to 90 percent north slopes 141 lmnaha-Anatone complex, 15 to 30 7.9 0.8% percent south slopes 143 lmnaha-Bocker-Clearline complex, 30 80.l 8.3% to 60 percent south slopes 145 lmnaha-Clearline-Rock outcrop 30.3 3.1% complex, 60 to 90 percent south slopes 166 Klicker-Thirstygulch-Anatone complex, 126.l 13.0%

30 to 60 percent slopes 190 limberjim-Syrupcreek complex, 30 to 60 9.5 1.0% percent north slopes 314 Tamarackcanyon-Olot-Harlow 13.5 1.4% complex, 30 to 60 percent south slopes 322 Threebuck-Tamarackcanyon-Harlow 23.l 2.4% complex, 30 to 60 percent north slopes Map Unit Symbol Map Unit Name Acres 947.0 98.0% in AOI Percent of AOI Subtotals for Soll Survey Area Totals for Area of Interest 966.6 100.0%

Map Unit Symbol Map Unit Name Acres in AOI Percent of

AOI

0019EW Terrodd-Melloe- 5.8 0.6% Gulliford complex, 0 to 5 percent slopes

35020N Anatone-Btree- 5.7 0.6% Flycreek complex, 60

1 NRCS Web Soil Survey.

[8] to 90 percent north slopes

5771CO Limberjim-Kamela- 3.7 0.4% Anatone complex, 30 to 60 percent slopes

5776CN Limberjim-Syrupcreek 3.3 0.3% complex, 30 to 60 percent north slopes

5809CO Anatone-Bocker- 0.3 0.0% Fivebeaver complex, 30 to 60 percent slopes

5834CO Klicker-Five beaver- 0.8 0.1% Kamela complex, 30 to 60 percent slopes

Subtotals for Soil Survey Area 19.6 2.0% Totals for Area of Interest 966.6 100.0%

Any past soil contamination at the site is identified as, None in Oregon DEQ Environmental Cleanup Site Information database, Oregon DEQ Leaking Underground Storage Tanks database, and EPA Superfund database.

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

Also see TAB 6

Protected Natural Features:

Little Sheep Creek is included in the project area.

See Section 2.2: Project Site Characteristics.

Measures to protect these features:

Project will utilize erosion and sediment control BMPs to avoid discharging sediment-laden, construction stormwater runoff into the streams.

Mean Annual Precipitation at the Project Site:2 17.58 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

2 NRCS Annual Climate Data 3 Precipitation frequency for•Westem States

[9]

1.6 inches/day

The 10-year, 24-hour storm event:

• 2.2 inches/day

The 25-year, 24-hour storm event:

2.5 inches/day

Section 3: Nature of Construction Activity

3.1 General Description of Project and Scope of Work:

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

The Wallowa Mountain Loop Road (NSFR 39) is part of the Hells Canyon Scenic Byway and is designated an All-American Road for its unique scenic, historic, and recreational qualities.

The pavement along this two-lane forest highway is in poor condition with deep potholes, ruts, alligator cracking, and crumbled edges. Conveyance of Little Sheep Creek is

• constrained by twin culverts. Sight distance is limited. Ground settlement related to organic material within the roadway embankment and frost heave related to inadequate drainage have caused subgrade breakdown at several locations. Wear and vandalism have reduced the effectiveness of warning signs along the route. Falling rocks, branches and trees commonly plug roadside ditches and enter the roadway from steep, raveling cut slopes.

The proposed work will involve the excavation and repair of localized subgrade areas, the stabilization of shoulders, installation of cross drain culverts the addition of underdrains for improved ditch drainage, a full depth reclamation and foam asphalt overlay, and striping and signing upgrades to enhance safety. The existing J-curve at the intersection of NSFR 39 and OR 350 will be straightened to a T-intersection to improve sight distance safety. The twin culverts in Little Sheep Creek will be replaced with a bridge to enhance fish passage. Other items include clearing of sight-blocking vegetation, removal of hazard trees, slope revegetation, and ditch cleaning.

The type or function of the project is: Other transportation-related (Bridge construction and roadway maintenance)

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):

• To be completed by contractor

[10]

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 107.0lA(h)).

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

Size of the Construction Project:

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

Estimated Area

Total project area (within ROW or Construction limits}:

Construction site area to be disturbed:

Percent Impervious Area BEFORE Construction: 86.0 %

Runoff Coefficient BEFORE Construction: 0.79

Percent Impervious Are AFTER Construction:

Runoff Coefficient AFTER Construction:

[II]

85.8%

0.83

Units

, 16.16 Acres

16.08 Acres

3.

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3.3 Potential Sources of Pollutants

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

Potential Construction Site Pollutants

Construction Activity "' = ... !l t ., = = c:.:, o(l"' .. .. = 't: "0 e ... 'y 1: .'!l o(l ..c ·-"' .. ·.: :a ,:,; = ,.Q ., ... = = = a fLi z = Q. E--< Q II, Clearing, excavating, and grading X X

Fill of roadway embankment, backfill at structures X X

Vehicle/equipment fueling and maintenance X X

Vehicle/equipment use and storage X

Sanitary/septic waste 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

Demolition and debris disposal X X X

Solid waste (trash and debris) X

Hazardous waste or contaminated spills 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

'"' s ...

X

X

Construction and waste material expected to be stored on-site includes (to be completed by contractor):

Material Storage Location

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!l = .. :! .. = ..c= ... 0 Oi:i.

X

X

X

X

X

X

Section 4: Site Maps

Vicinity maps are located in TAB 5.

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

[15]

Section 5: Discharges

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

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

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

1. NIA

5.1 Allowable Non-Stormwater Discharges

Non-stormwater discharges used at the construction sited are identified below, along with control measures used to eliminate or reduce the discharges and BMPs used to prevent stormwater contamination. To be reviewed, edited, and completed by Contractor.

Applicable to this

Project (check all that apply)

[8]

[8]

[8]

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 haza;dous materials have not occurred (unless all spilled material has been removed) and where detergents are not used

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

D Landscape irrigation

[8] , Discharges from emergency fire-fighting activities

D Fire hydrant flushings

D Uncontaminated air conditioning or compressor condensate

Control Measures

To be completed by contractor

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

TAB6

5.2 Receiving Waters:

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

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Name(s) of the first surface water that receives stormwater directly from your site and/or from the MS4

1. Little Sheep Creek

Impaired Waters/TDMLs:

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

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

1. Yes0No[2] NIA Yes 0No [2J NIA

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

EPA 303(d) GIS data layer.

Tier 2, 2.5 or 3 Waters

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

Is this surface If yes, specify which Tier.

water designated as Tier 2, 2.5, or 3?

1. Yes0No[2] Choose an item.

If applicable, documentation of consultation with State or Federal TMDL authorities on consistency ofESCP conditions with the approved TMDL is found in TAB 11. The control measures required to ensure that discharge of pollutants from the site are consistent with the assumptions and requirements of the EPA-established or approved 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, as well as the associated §401 certification or other special conditions, define additional monitoring and reporting requirements. Details about water quality monitoring and reporting requirements applicable to this project are included in TAB 11.

Samples and measurements taken for the purpose of monitoring will be representative of the monitored activity. Records of all monitoring information will be retained in TAB 11, including all calibration and maintenance records and all original strip chart recordings for continuous monitoring instrumentation.

Records of monitoring information will include:

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

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

3. The date(s) analyses were performed

[17]

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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Section 6: Compliance with Other Applicable Requirements

6.1 Endangered Species Protection

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

□ A DB De On ~E □ F

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 NOI.

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

[19]

Criterion E.

Criterion F.

affect listed species or critical habitat. You must include copies of the correspondence between yourself and the Services in your ESCP and NOi.

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

1. 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

11. 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 ESCP 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 ESCP and NOi.

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

6.2 Historic Preservation

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

0 Dike

D Berm

D Catch Basin

D Pond

[8J Ditch, trench, swale, perimeter drain, etc.

[8J Culvert

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

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

2. If answer to step 1 is Yes, have professional surveys or evaluations determined that historic properties do not exist (or have prior disturbances at the site precluded the existence of historic properties)? No

[20]

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

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? Yes

Provide documentation for the basis of this determination. SHPO Case No. 16-1335 (SHPO Report# 28787). Received May 11, 2017

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

Provide the nature of their response. After examination of the report produced by EWU, the Tribes had no further concerns.

6.3 Safe Drinking Water Act Underground Injection Control Requirements

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

Check all that apply:

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

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

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

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

Click here to enter text.

[21]

Section 7: Erosion and Sediment Controls

Control measures at the construction site are selected, installed, implemented, and maintained to minimize pollutants in the discharge as necessary to meet applicable water quality standards.

The objectives of this 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. 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 o.ther 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? Choose an item.

NOTE: Reference EPA CGP appendix G for buffer guidance.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

7 .2 Perimeter Controls

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

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

The following perimeter controls will be implemented:

Measure: Fiber rolls

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

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

[23]

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

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

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

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

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

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

7.3 Sediment Track-Out

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

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

Measure: Washing within perimeter, without detergents or solvents

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

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

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

[24]

7 .4 Stockpiled Soil or Other Erodible Materials

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

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

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

Measure: Revegetation with contractor-approved seed mix

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

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

Measure: Fiber rolls

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

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

Measure: Silt Fence

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

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

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

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

• The silt fence should not be i;emoved 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.

[25]

Contractor and PE

7.5 Minimize Dust

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

Measure: Application of water for dust control

Implementation: During active construction as needed. Apply at a rate of 3 gallons per acre, using a diffused or sprinkled flow. Care should be taken not to saturate or muddy the dust and that dust generation does not increase. Please also refer to project schedule, contract, and plan set (Erosion Control section).

Maintenance: Application of water for dust control requires constant attention. Sprinkling will likely need to be done several times per day, especially during hot, dry weather.

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

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.

Measure: Temporary Tackifier

Implementation: In places where exposed soil surfaces are not to be fine-graded for…