A.07.24_W9127N-17-R-0043-0004_Final.pdf

TOC-1

OAKS BOTTOM WILDLIFE REFUGE TIDAL RESTORATION PROJECT

CITY OF PORTLAND

MULTNOMAH COUNTY, OREGON

TABLE OF CONTENTS

00010 SOLICITATION, OFFER, AND AWARD (SF 1442)

SF 30 INFORMATION ON AMENDMENT: NOT USED

00010 PRICE SCHEDULE

00100 INSTRUCTI0NS TO BIDDERS

00600 REPRESENTATION AND CERTIFICATIONS

00700 CONTRACT CLAUSES

00800 SPECIAL CONTRACT REQUIREMENTS

GENERAL AND TECHNICAL SPECIFICATION REQUIREMENTS

ATTACHMENTS

A1: Submittal Register (ENG FORM 4288-R)

A2: Transmittal Form (ENG FORM 4025-R)

A3: Construction Project Identification Sign

A4: Spill Emergency - Initial Report Form

A5: Oregon Wage Rates

A6: Contaminated Media Report

A7: Supplementary Bathymetric Data

A8: Combined Geotechnical Report

A9: Non-park Use of Park Property (NPUP)

A10: City of Portland Greenway Permit

A11: Department of State Lands 404 Joint Application Fill/Removal Permit

A12: Nationwide Permit Documentation

A13: Offeror's Experience Form

A14: Past Performance Questionnaire

A15: Arborist Report

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AMD# 0004

Oaks Bottom Wildlife Refuge Tidal Restoration Project

PROJECT TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

01 10 00.00 25 CONTRACT ADMINISTRATION DATA

01 10 10.00 25 CONTRACTOR'S OPERATIONS AND REQUIREMENTS

01 11 00.00 25 SUMMARY OF WORK

01 22 00.00 25 MEASUREMENT AND PAYMENT

01 32 01.00 25 PROJECT SCHEDULE

01 33 00 SUBMITTAL PROCEDURES

01 35 26.00 25 GOVERNMENTAL SAFETY REQUIREMENTS

01 42 00 SOURCES FOR REFERENCE PUBLICATIONS

01 45 00.00 25 QUALITY CONTROL

01 45 00.15 25 RESIDENT MANAGEMENT SYSTEM CONTRACTOR MODE (RMS CM)

01 56 39.00 25 TEMPORARY TREE AND PLANT PROTECTION

01 57 19.00 25 TEMPORARY ENVIRONMENTAL CONTROLS

01 78 39.00 25 PROJECT RECORD DOCUMENTS

DIVISION 02 - EXISTING CONDITIONS

02 41 00.00 25 DECONSTRUCTION

DIVISION 03 - CONCRETE

03 20 00.00 25 CONCRETE REINFORCING

03 31 01.00 25 CAST-IN-PLACE STRUCTURAL CONCRETE FOR CIVIL WORKS

03 40 00.00 25 PLANT-PRECAST CONCRETE PRODUCTS FOR BELOW GRADE

CONSTRUCTION

DIVISION 05 - METALS

05 50 15.00 25 CIVIL WORKS FABRICATIONS

DIVISION 06 - WOOD, PLASTICS, AND COMPOSITES

06 10 00.00 25 ROUGH CARPENTRY

06 73 01.00 25 FIBERGLASS REINFORCED PLASTIC (FRP) GRATING

DIVISION 31 - EARTHWORK

31 00 00.00 25 EARTHWORK

31 05 19.00 25 GEOTEXTILE

31 05 21.00 25 GEOGRID SOIL REINFORCEMENT

31 11 00.00 25 CLEARING AND GRUBBING

31 23 00.00 25 EXCAVATION AND FILL

31 62 16.16 25 STEEL H-PILES

DIVISION 32 - EXTERIOR IMPROVEMENTS

32 11 24.00 25 GRADED CRUSHED AGGREGATE BASE COURSE FOR FLEXIBLE PAVEMENT

32 12 10.00 25 BITUMINOUS TACK AND PRIME COATS

32 12 16.00 25 HOT-MIX ASPHALT (HMA) FOR ROADS

32 31 13.00 25 CHAIN LINK FENCES AND GATES

32 92 19.00 25 SEEDING

DIVISION 34 - TRANSPORTATION

34 11 00.00 25 RAILROAD TRACK AND ACCESSORIES

PROJECT TABLE OF CONTENTS Page 1

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SECTION TABLE OF CONTENTS

DIVISION 01 - GENERAL REQUIREMENTS

SECTION 01 56 39.00 25

TEMPORARY TREE AND PLANT PROTECTION

PART 1 GENERAL

1.1 SUMMARY

1.2 DEFINITIONS

1.3 REFERENCES

1.4 PERFORMANCE REQUIREMENTS

1.5 SUBMITTALS

1.6 QUALITY ASSURANCE

1.7 SCHEDULING

PART 2 PRODUCTS

2.1 MATERIALS

PART 3 EXECUTION

3.1 EXAMINATION

3.2 PREPARATION

3.3 PROTECTION, GENERAL

3.4 TRENCHING WITHIN RPZ OR TREE AND PLANT PROTECTION ZONE

3.5 EXCAVATING AND FILLING WITHIN RPZ OR TREE PROTECTION ZONE

3.6 REPAIR AND REMOVAL OF TREES

3.7 COMPENSATION FOR TREES DAMAGED BY CONSTRUCTION

-- End of Section Table of Contents --

SECTION 01 56 39.00 25 Page 1

1.7 SCHEDULING

a. Notify the Contracting Officer and the City of Portland 48 hours prior to start of construction work that is to occur on or in vicinity of protected trees and plants.

b. Obtain required Urban Forestry Permit inspections. Allow Tree Inspector 24 hours to respond to inspection requests.

PART 2 PRODUCTS

2.1 MATERIALS

a. Fencing: Continuous galvanized metal mesh fencing with driven steel posts as indicated spaced a maximum of 6 feet on center. If field conditions are shown to render specified fencing impracticable, Tree Inspector may approve alternative fencing upon request from Project Arborist:

(1) Portable galvanized metal mesh fence panels 6 feet high by 8 feet wide with steel panel stand bases.

(2) Continuous rolled orange plastic mesh fencing 4 feet high attached with zip-ties to 6 foot driven metal t-posts spaced a maximum of 6 feet on center.

b. Pruning Equipment:

(1) Roots and Branches Larger than 1 inch in diameter: Sharp saw.

(2) Roots and Branches 1 inch or less in diameter: Pruning shears.

c. Mulch: Imported Mulch: Fir and/or hemlock bark, Med. to Finely Shred. Sawdust and wood shavings will not be acceptable. Submit a 1/2 Gallon Sample for each type of Bark Mulch used onsite.

d. Tree Root Protection Zone Signage: Yellow paper, black text, laminated, affixed to tree protection fencing with zip or twist ties.

Sign template can be downloaded from:

https://www.portlandoregon.gov/trees/article/534674.

PART 3 EXECUTION

3.1 EXAMINATION

Examine site to locate Tree Plan elements and verify that site construction fence and erosion control fence are located correctly as indicated and relative to trees to be protected.

3.2 PREPARATION

a. Conduct Preinstallation Meeting to verify:

(1) Preconstruction tree protection measures required by Urban Forestry Permit.

(2) Location of tree protection fencing. Tree Inspector may require Contractor to make minor adjustments in the location of tree protection fencing at no additional cost to Government.

SECTION 01 56 39.00 25 Page 4

b. Pre-Construction Tree Care

Pruning and Structural Support:

(1) Prune all trees designated to be retained within the project limits according to Urban Forestry Permit using Certified Tree Workers by or under supervision of Certified Arborist according to ANSI A300 Part 1, Pruning Standards.

(2) Provide tree structural support required by Urban Forestry Permit using Certified Tree Workers by or under supervision of Certified Arborist.

3.3 PROTECTION, GENERAL

a. Perform tree and shrub protection according to ANSI A300 Part 5, Management of Trees and Shrubs During Construction.

b. Verify that required pre-construction tree care has been completed prior to installation of tree protection fencing.

c. Erect and maintain temporary tree protection fencing around RPZs and Tree and Plant Protection Zones before placing temporary facilities or starting Work.

(1) Install fencing in locations indicated or approved by Project Arborist, flush with initial finished grade, with protection zone signage in a prominent location on each fence. Maintain signage until fencing is removed.

(2) Once erected, maintain tree protection fencing through duration of the work. Prohibit ingress, removal or modifications of tree protection fencing without prior approval from Project Arborist. If activity is necessary within RPZ or Tree and Plant Protection Zone, submit a work plan for approval by the Contracting Officer and Project Arborist prior to the start of any such activity.

(3) Do not store construction equipment, material, debris, or excavated material within fenced area.

(4) Do not permit vehicles, equipment or foot traffic within fenced area.

(5) Maintain fenced area free of weeds and trash.

(6) Remove fencing after final inspection or with prior written approval of the Contracting Officer and Project Arborist.

d. Protect all plant growth including root systems of trees and plants from the following:

(1) Dumping of construction related refuse.

(2) Chemically injurious materials and liquids used in construction process.

(3) Noxious materials in solution caused by run-off and spillage

SECTION 01 56 39.00 25 Page 5

DIVISION 31 - EARTHWORK

SECTION 31 00 00.00 25

EARTHWORK

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.2.1 Satisfactory Materials

1.2.2 Unsatisfactory Materials

1.2.3 Degree of Compaction

1.2.4 Topsoil

1.2.5 Hard/Unyielding Materials

1.2.6 Unstable Material

1.2.7 Select Granular Material

1.2.7.1 General Requirements

1.2.8 Initial Backfill Material

1.3 SYSTEM DESCRIPTION

1.3.1 Classification of Excavation

1.3.2 Dewatering Work Plan

1.4 SUBMITTALS

PART 2 PRODUCTS

2.1 TOPSOILS

2.1.1 Suitable Topsoil Requirements

2.2 MATERIAL FOR RIP-RAP

2.2.1 Bedding Material

PART 3 EXECUTION

3.1 GENERAL EXCAVATION

3.1.1 Ditches, Gutters, and Channel Changes

3.1.2 Drainage

3.1.3 Dewatering

3.1.4 Structural Excavation

3.2 SHORING

3.2.1 General Requirements

3.2.2 Geotechnical Engineer

3.3 GRADING AREAS

3.4 GROUND SURFACE PREPARATION

3.4.1 General Requirements

3.4.2 Frozen Material

3.5 BACKFILLING AND COMPACTION

3.6 EMBANKMENTS

3.6.1 Earth Embankments

3.7 SUBGRADE PREPARATION

3.7.1 Construction

3.7.2 Compaction

3.7.2.1 Subgrade for Railroads

SECTION 31 00 00.00 25 Page 1

3.7.2.2 Subgrade for Pavements

3.8 FINISHING

3.8.1 Subgrade and Embankments

3.9 PLACING TOPSOIL

3.10 TESTING

3.10.1 Fill and Backfill Material Gradation

3.10.2 In-Place Densities

3.10.3 Moisture Contents

3.10.4 Optimum Moisture and Laboratory Maximum Density

3.10.5 Tolerance Tests for Subgrades

3.11 DISPOSITION OF SURPLUS MATERIAL

-- End of Section Table of Contents --

SECTION 31 00 00.00 25 Page 2

1.2.4 Topsoil

Material suitable for topsoils obtained from offsite or onsite areas is defined as: Natural, friable soil representative of productive, well-drained soils in the area, free of subsoil, stumps, rocks larger than one inch diameter, brush, weeds, toxic substances, and other material detrimental to plant growth. Amend topsoil pH range to obtain a pH of 5.5 to 7.

1.2.5 Hard/Unyielding Materials

Hard/Unyielding materials comprise weathered rock, dense consolidated deposits, or conglomerate materials which are not included in the definition of "rock" with stones greater than 6 inch in any dimension.

These materials usually require the use of heavy excavation equipment, ripper teeth, or jack hammers for removal.

1.2.6 Unstable Material

Unstable materials are too wet to properly support the utility pipe, conduit, or appurtenant structure.

1.2.7 Select Granular Material

1.2.7.1 General Requirements

Select granular material consist of clean, open graded, 4"-2" crushed aggregate materials.

1.2.8 Initial Backfill Material

Initial backfill consists of select granular material of 4"-2" crushed aggregate.

1.3 SYSTEM DESCRIPTION

Subsurface soil boring logs are shown in the geotechnical report. These data represent the best subsurface information available; however, variations may exist in the subsurface between boring locations.

1.3.1 Classification of Excavation

No consideration will be given to the nature of the materials, and all excavation will be designated as unclassified excavation.

1.3.2 Dewatering Work Plan

Submit procedures for accomplishing dewatering work.

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-01 Preconstruction Submittals

SECTION 31 00 00.00 25 Page 4

[4] turfing materials. Repair graded, topsoiled, or backfilled areas prior to acceptance of the work, and re-established grades to the required elevations and slopes.

3.8.1 Subgrade and Embankments

During construction, keep embankments and excavations shaped and drained.

Maintain ditches and drains along subgrade to drain effectively at all times. Do not disturb the finished subgrade by traffic or other operation. Protect and maintain the finished subgrade in a satisfactory condition until ballast, subbase, base, or pavement is placed. Do not permit the storage or stockpiling of materials on the finished subgrade.

Do not lay subbase, base course, ballast, or pavement until the subgrade has been checked and approved, and in no case place subbase, base, surfacing, pavement, or ballast on a muddy, spongy, or frozen subgrade.

3.9 PLACING TOPSOIL

On areas to receive topsoil, prepare the compacted subgrade soil to 2 inches depth for bonding of topsoil with subsoil. Spread topsoil evenly to a thickness of 6 inches and grade to the elevations and slopes shown. Do not spread topsoil when frozen or excessively wet or dry. Obtain material required for topsoil in excess of that produced by excavation within the grading limits from offsite areas. Reference Sections 32 92 19.00 25 SEEDING for additional requirements on topsoil.

3.10 TESTING

Perform testing by the Contractor's validated testing facility. Submit qualifications of the Contractor's validated testing facilities. If the Contractor elects to establish testing facilities, do not permit work requiring testing until the Contractor's facilities have been inspected, Corps validated and approved by the COR.

a. Determine field in-place density in accordance with ASTM D1557.

b. When test results indicate, as determined by the COR, that compaction is not as specified, remove the material, replace and recompact to meet specification requirements.

c. Perform tests on recompacted areas to determine conformance with specification requirements. Appoint a registered professional civil engineer to certify inspections and test results. These certifications must state that the tests and observations were performed by or under the direct supervision of the engineer and that the results are representative of the materials or conditions being certified by the tests. The following number of tests, if performed at the appropriate time, will be the minimum acceptable for each type operation.

3.10.1 Fill and Backfill Material Gradation

One test per 50 cubic yards stockpiled or in-place source material.

Determine gradation of fill and backfill material in accordance with

ASTM C136/C136M.

3.10.2 In-Place Densities

a. One test per 10,000 square feet, or fraction thereof, of each lift of fill or backfill areas compacted by other than hand-operated

SECTION 31 00 00.00 25 Page 10

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DIVISION 31 - EARTHWORK

SECTION 31 23 00.00 25

EXCAVATION AND FILL

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.2.1 Capillary Water Barrier

1.2.2 Degree of Compaction

1.2.3 Hard Materials

1.2.4 Rock

1.3 SUBMITTALS

1.4 DELIVERY, STORAGE, AND HANDLING

1.5 CRITERIA FOR BIDDING

1.6 REQUIREMENTS FOR OFF SITE SOIL

1.7 QUALITY ASSURANCE

1.7.1 Shoring and Sheeting Plan

1.7.2 Dewatering Work Plan

PART 2 PRODUCTS

2.1 SOIL MATERIALS

2.1.1 Satisfactory Materials

2.1.2 Unsatisfactory Materials

2.1.3 Cohesionless and Cohesive Materials

2.1.4 Expansive Soils

2.1.5 Nonfrost Susceptible (NFS) Material

2.1.6 Common Fill

2.1.7 Backfill and Fill Material

2.1.8 Select Material

2.1.9 Topsoil

2.2 POROUS FILL FOR CAPILLARY WATER BARRIER

PART 3 EXECUTION

3.1 PROTECTION

3.1.1 Shoring and Sheeting

3.1.2 Drainage and Dewatering

3.1.2.1 Drainage

3.2 SURFACE PREPARATION

3.2.1 Clearing and Grubbing

3.2.2 Stripping

3.2.3 Unsuitable Material

3.3 EXCAVATION

3.3.1 Structures With Spread Footings

3.3.2 Excavated Materials

3.3.3 Final Grade of Surfaces to Support Concrete

3.4 SUBGRADE PREPARATION

3.5 FILLING AND BACKFILLING

SECTION 31 23 00.00 25 Page 1

3.5.1 Common Fill Placement

3.5.2 Backfill and Fill Material Placement

3.5.3 Select Material Placement

3.5.4 Backfill and Fill Material Placement Over Pipes and at Walls

3.6 COMPACTION

3.6.1 General Site

3.6.2 Structures, Spread Footings, and Concrete Slabs

3.6.3 Adjacent Area

3.6.4 Paved Areas

3.7 FINISH OPERATIONS

3.7.1 Grading

3.7.2 Topsoil and Seed

3.7.3 Protection of Surfaces

3.8 DISPOSITION OF SURPLUS MATERIAL

3.9 FIELD QUALITY CONTROL

3.9.1 Sampling

3.9.2 Testing

3.9.2.1 Fill and Backfill Material Testing

3.9.2.2 Select Material Testing

3.9.2.3 Porous Fill Testing

3.9.2.4 Density Tests

3.9.2.5 Moisture Content Tests

-- End of Section Table of Contents --

SECTION 31 23 00.00 25 Page 2

Porous fill test for capillary water barrier

Density tests

Moisture Content Tests

Copies of all laboratory and field test reports within 24 hours of the completion of the test.

1.4 DELIVERY, STORAGE, AND HANDLING

Perform in a manner to prevent contamination or segregation of materials.

1.5 CRITERIA FOR BIDDING

Base bids on the following criteria:

a. Surface elevations are as indicated.

b. Pipes or other artificial obstructions, except those indicated, will not be encountered.

c. Ground water elevations indicated by the boring log were those existing at the time subsurface investigations were made and do not necessarily represent ground water elevation at the time of construction.

d. Ground water elevation is 0 feet below existing surface elevation.

e. Material character is indicated by the boring logs.

f. Hard materials and rock will not be encountered in 100 percent of the excavations at 0 feet below existing surface elevations.

g. Suitable backfill and bedding material in the quantities required is not available at the project site.

h. Blasting will not be permitted. Remove material in an approved manner.

1.6 REQUIREMENTS FOR OFF SITE SOIL

Soils brought in from off site for use as backfill must be tested for petroleum hydrocarbons, BTEX, PCBs and HW characteristics (including toxicity, ignitability, corrosivity, and reactivity). Backfill must not contain concentrations of these analytes above the appropriate State and/or EPA criteria, and must pass the tests for HW characteristics. Determine petroleum hydrocarbon concentrations by using appropriate State protocols.

Determine BTEX concentrations by using EPA SW-846.3-3 Method 5035/8260B.

Perform complete TCLP in accordance with EPA SW-846.3-3 Method 1311.

Perform HW characteristic tests for ignitability, corrosivity, and reactivity in accordance with accepted standard methods. Perform PCB testing in accordance with accepted standard methods for sampling and analysis of bulk solid samples. Provide borrow site testing for petroleum hydrocarbons and BTEX from a grab sample of material from the area most likely to be contaminated at the borrow site (as indicated by visual or olfactory evidence), with at least one test from each borrow site. For each borrow site, provide borrow site testing for HW characteristics from a composite sample of material, collected in accordance with standard soil

SECTION 31 23 00.00 25 Page 5

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3.6.2 Structures, Spread Footings, and Concrete Slabs

Compact top 12 inches of subgrades to 95 percent of ASTM D1557. Compact fill and backfill material to 95 percent of ASTM D1557.

3.6.3 Adjacent Area

Compact areas within 5 feet of structures to 95 percent of ASTM D1557.

3.6.4 Paved Areas

Compact top 12 inches of subgrades to 95 percent of ASTM D1557. Compact fill and backfill materials to 95 percent of ASTM D1557.

3.7 FINISH OPERATIONS

3.7.1 Grading

Finish grades as indicated within one-tenth of one foot. Grade areas to drain water away from structures. Maintain areas free of trash and debris. For existing grades that will remain but which were disturbed by Contractor's operations, grade as directed.

3.7.2 Topsoil and Seed

Refer to Section 32 92 19.00 25 SEEDING.

3.7.3 Protection of Surfaces

Protect newly backfilled, graded, and topsoiled areas from traffic, erosion, and settlements that may occur. Repair or reestablish damaged grades, elevations, or slopes.

3.8 DISPOSITION OF SURPLUS MATERIAL

Remove from Government property surplus or other soil material not required or suitable for filling or backfilling, and brush, refuse, stumps, roots, and timber.

3.9 FIELD QUALITY CONTROL

3.9.1 Sampling

Take the number and size of samples required to perform the following tests.

3.9.2 Testing

Perform one of each of the following tests for each material used. Provide additional tests for each source change.

3.9.2.1 Fill and Backfill Material Testing

Test fill and backfill material in accordance with ASTM C136/C136M for conformance to ASTM D2487 gradation limits; ASTM D1140 for material finer than the No. 200 sieve; ASTM D4318 for liquid limit and for plastic limit;

ASTM D1557 for moisture density relations, as applicable.

SECTION 31 23 00.00 25 Page 11

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DIVISION 32 - EXTERIOR IMPROVEMENTS

SECTION 32 92 19.00 25

SEEDING

PART 1 GENERAL

1.1 REFERENCES

1.2 DEFINITIONS

1.2.1 Stand of Groundcover

1.3 RELATED REQUIREMENTS

1.4 SUBMITTALS

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Delivery

1.5.1.1 Seed Protection

1.5.2 Seed Storage

1.6 TIME RESTRICTIONS AND PLANTING CONDITIONS

1.6.1 Restrictions

1.7 TIME LIMITATIONS

1.7.1 Seed

PART 2 PRODUCTS

2.1 SEED

2.1.1 Application

2.1.2 Planting Dates

2.2 TOPSOIL

2.2.1 Off-Site Topsoil

2.2.2 Composition

2.3 MULCH

2.3.1 Straw

2.4 WATER

2.5 EROSION CONTROL MATERIALS

2.5.1 Erosion Control Blanket

2.5.2 Coir Fabric

2.5.3 Erosion Control Material Anchors

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 EXTENT OF WORK

3.1.1.1 Topsoil

3.2 SEEDING

3.2.1 Seed Application Seasons and Conditions

3.2.2 Seed Application Method

3.2.2.1 Broadcast and Drop Seeding

3.2.3 Mulching

3.2.3.1 Hay or Straw Mulch

3.2.4 Erosion Control Material

-- End of Section Table of Contents --

SECTION 32 92 19.00 25 Page 1

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Erosion Control Materials

1.5 DELIVERY, STORAGE, AND HANDLING

1.5.1 Delivery

1.5.1.1 Seed Protection

Protect from drying out and from contamination during on-site storage and handling.

1.5.2 Seed Storage

Store in cool, dry locations away from contaminants.

1.6 TIME RESTRICTIONS AND PLANTING CONDITIONS

1.6.1 Restrictions

Do not plant when the ground is frozen or when air temperature exceeds 90 degrees Fahrenheit.

1.7 TIME LIMITATIONS

1.7.1 Seed

Apply seed within twenty-four hours after seed bed preparation.

PART 2 PRODUCTS

2.1 SEED

2.1.1 Application

Seeding will be performed by the Contractor with seed supplied by the City of Portland. Seed mix will be inspected by qualified BES representative prior to application. Contractor will notify CoP BES staff 30 days prior to seeding. Seed is to be broadcast or applied as hydromulch.

2.1.2 Planting Dates

Unless otherwise specified or approved, perform seeding between the dates of October 1 and October 31. Perform the work only when local weather and other conditions are favorable to seeding and mulching. Do not undertake the work when wind velocities would prevent uniform application of seed and mulch materials.

2.2 TOPSOIL

2.2.1 Off-Site Topsoil

Conform to requirements specified in paragraph entitled COMPOSITION.

Additional topsoil must be furnished by the Contractor.

2.2.2 Composition

a. Containing from 5 to 10 percent organic matter as determined by the topsoil composition tests of the Organic Carbon, 6A, Chemical Analysis Method described in DOA SSIR 42. Maximum particle size, 1 inch.

SECTION 32 92 19.00 25 Page 4

Topsoil must be free of sticks, stones, roots, and other debris and objectionable materials.

b. Submit certified analysis of suitable topsoil from a qualified soil testing laboratory 20 working days prior to use on site. The report to contain the following:

(1) Percentages of organic matter; gradation of sand, silt, and clay content; action exchange capacity; sodium absorption ratio;

deleterious material; pH; and mineral and plant nutrient content of topsoil.

(2) Suitability of tested soil for plant growth.

(3) Based upon the test results, the laboratory soil analysis is to include recommendations for soil treatments and soil amendments to be incorporated. State recommendations in weight per 1,000 sq.

ft. or volume per cu. yd. for nitrogen, phosphorus, and potash nutrients and soil amendments to be added to produce satisfactory planting soil as defined in this section.

(4) Report presence of problem salts, minerals, or heavy metals, including aluminum, arsenic, barium, cadmium, chromium, cobalt, lead, lithium, and vanadium. If such problem materials are present, provide additional recommendations for corrective action.

(5) Report presence and quantity of weed and invasive plant seeds as defined in Section 31 00 00.00 25 EARTHWORK through a soil bank seed test.

c. Available Testing Laboratories: An independent laboratory, recognized by the State Department of Agriculture, with the experience and capability to conduct the testing indicated and that specializes in types of tests to be performed. Use either Lab 1 or 2 below for the required test information listed for topsoil properties under 1-4 above, also Lab 3 below for weed seed testing.

(1) Soil and Plant Laboratory, Inc. -www.soilandplantlaboratory.com

(2) Western Agricultural Laboratories - www.al.labs.west.com

(3) Oregon State University Seed Laboratory -www.seedlab.oregonstate.edu

d. Where tests of topsoil show results that fail to conform to required standards, include with the report a recommended treatment plan to bring the material into conformance.

2.3 MULCH

Mulch must be used if seed if broadcast. Mulch must be free from noxious weeds, mold, and other deleterious materials. If seed is applied as hydromulch, additional mulch is not needed.

2.3.1 Straw

Stalks from oats, wheat, rye, barley, or rice. Furnish in air-dry condition and of proper consistency for placing with commercial mulch

SECTION 32 92 19.00 25 Page 5 blowing equipment. Straw must contain no fertile seed.

2.4 WATER

Source of water must be approved by the COR and of suitable quality for irrigation, containing no elements toxic to plant life.

2.5 EROSION CONTROL MATERIALS

The Contractor may propose other types of erosion control material, subject to approval by the COR. Erosion control material must conform to the following:

2.5.1 Erosion Control Blanket

Erosion control blanket of straw or unwoven coconut fiber to be placed in areas where broadcast seeding method is implemented. If hydromulch method is used, erosion control blanket is to be installed only on streambanks.

100 percent agricultural straw stitched with a degradable nettings, designed to degrade within 12 months or non-woven coconut fabric stitched with degradable netting, such as North American Green C125BN or similar.

2.5.2 Coir Fabric

Coir fabric must be natural, biodegradable woven coir bristle, minimum weight of 980 g/m2, Rolanka BioD Mat 90 or equivalent. Fabric must be free of plastic or other non-biodegradable materials. Submit a Coir Fabric sample 45 days prior to installation for approval.

2.5.3 Erosion Control Material Anchors

Erosion control anchors must be non-live wooden stakes.

PART 3 EXECUTION

3.1 PREPARATION

3.1.1 EXTENT OF WORK

Provide soil preparation, seeding, and surface topdressing of all newly graded finished earth surfaces, unless indicated otherwise, and at all areas inside or outside the limits of construction that are disturbed by the Contractor's operations.

3.1.1.1 Topsoil

Provide 6 inches of topsoil to meet indicated finish grade. Remove debris and stones larger than 1 inch in any dimension remaining on the surface after finish grading. Correct irregularities in finish surfaces to eliminate depressions. Protect finished topsoil areas from damage by vehicular or pedestrian traffic.

3.2 SEEDING

3.2.1 Seed Application Seasons and Conditions

Immediately before seeding, restore soil to proper grade. Do not seed when ground is muddy or frozen or in an unsatisfactory condition for seeding.

If special conditions exist that may warrant a variance in the above

SECTION 32 92 19.00 25 Page 6

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Date: July 24, 2017

To: Interested Person

From: Morgan Steele, Land Use Services 503-823-7731 / morgan.steele@portlandoregon.gov

NOTICE OF A TYPE II DECISION ON A PROPOSAL IN

YOUR NEIGHBORHOOD

The Bureau of Development Services has approved a proposal in your neighborhood. The mailed copy of this document is only a summary of the decision. The reasons for the decision are included in the version located on the BDS website https://www.portlandoregon.gov/bds/46429. Click on the District Coalition then scroll to the relevant Neighborhood, and case number. If you disagree with the decision, you can appeal.

Information on how to do so is included at the end of this decision.

CASE FILE NUMBER: LU 17-173788 GW

GENERAL INFORMATION

Applicant: David Munro Tetra Tech, Inc.

1020 SW Taylor Street, Suite 530 Portland, OR 97205 503-223-5388 david.munro@tetratech.com

Owner: Bureau of Parks and Recreation

1120 SW 5th Avenue, Room 1302 Portland, OR 97204

Representatives: Sean Bistoff Bureau of Environmental Services 1120 SW 5th Avenue, Suite 1100 Portland, OR 97204 503-823-7125 sean.bistoff@portlandoregon.gov

Lynn Barlow Bureau of Parks and Recreation 1120 SW 5th Avenue, Room 1302 Portland, OR 97204 503-823-4404 lynn.barlow@portlandoregon.gov

Site Address: Oaks Bottom Wildlife Refuge

Legal Description: BLOCK A&B TL 1100, SELLWOOD; TL 300 0.56 ACRES, SECTION 14

1S 1E; TL 400 0.48 ACRES, SECTION 14 1S 1E; TL 100 25.71 ACRES,

SECTION 14 1S 1E; TL 100 60.05 ACRES, SECTION 23 1S 1E; TL 600

ADDED BY AMENDMENT

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11.47 ACRES, SECTION 23 1S 1E; TL 201 4.26 ACRES, SECTION 14 1S

1E

Tax Account No.: R752721160, R991140930, R991141220, R991141240, R991230500, R991230730, R991141260, R991230730

State ID No.: 1S1E22DA 01100, 1S1E14C 00300, 1S1E14C 00400, 1S1E14C 00100, 1S1E23 00100, 1S1E23 00600, 1S1E14C 00201, 1S1E23 00600

Quarter Section: 3631 Neighborhood: Sellwood-Moreland, contact chair.landuse.smile@gmail.com Business District: Sellwood-Westmoreland, contact Emily Pinkstaff at emily.pinkstaff@newseasonsmarket.com District Coalition: Southeast Uplift, contact Leah Fisher at 503/232-0010 Plan District: None Other Designations: 100-Year Floodplain

Zoning: Base Zones: Open Space (OS), Residential Farm/Forest (RF), Residential

5,000 (R5), Residential 2,500 (R2.5) Overlay Zones: Alternative Design Density (a), Design (d), River General

(g), River Natural (n), River Water Quality (q)

Case Type: GW – Greenway Review Procedure: Type II, an administrative decision with appeal to the Hearings Officer.

Proposal:

The purpose of this project is to construct a tidal reconnection and enhance habitat within Oaks Bottom Wildlife Refuge. The project is a collaborative effort between the City of Portland Bureau of Environmental Services (BES), Portland Parks and Recreation (PP&R) and the U.S. Army Corps of Engineers (USACE). The Oaks Bottom Wildlife Refuge Tidal Reconnection Project includes four major elements:

1. Replacement of the culvert under the railroad berm with a new larger culvert to allow a significantly improved hydrologic connection and fish and wildlife passage. The existing 5-foot diameter, 90-foot long culvert with an upstream invert of 7.2 feet and a downstream invert of 7.0 feet will be replaced with a 16-foot span concrete arch culvert with a length of 48 feet, an upstream low-flow channel invert of 5.5 feet, and a downstream invert of 5.3 feet. The new culvert will have a natural substrate bottom comprised of a sand/gravel/cobble mix and a wildlife bench along both sides at an elevation of 8.0 feet. The new culvert will be connected to the Lower Willamette River approximately 95% of the time at the daily mean water surface elevation. The existing culvert has high velocities up to 6-8 feet per second (fps) during tidal changes. The proposed culvert will have velocities less than 2 fps for 99% of the time during the salmon rearing season (November to June). During the summer low flow season, the culvert will occasionally be disconnected (river elevation is below culvert invert), but velocities will still typically be below 2 fps. The primary period of interest for accessibility for salmonids is from November to June when juvenile salmonids are migrating out of the Willamette basin and utilizing floodplain and tidal slough habitats.

2. Removal of the water control structure and excavation of tidal slough channels to connect the unregulated reservoir to the culvert for fish rearing and refuge, typically from November to June, and reduce the potential for fish stranding. The existing channel to the reservoir is proposed to be excavated down to meet the new culvert elevation of 5.5 feet and slope up to the smaller reservoir outlet at 9.0 feet in elevation.

The length of the channel will be increased by reconnecting a remnant channel for a total length of 1,600 feet from the Willamette River, with a slope of 0.3%. Eight cobble riffles will be installed to maintain the gradient, prevent headcutting and prevent the

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complete drainage of the reservoir. North of the culvert and channel, the southernmost duck pond will be connected to the new tidal channel and further graded to allow positive drainage out for fish egress, restore seasonal wetland habitat, and provide approximately 700 feet of additional tidal slough channel.

3. Removal of invasive species and revegetation with native species within the construction footprint. Associated with the grading of the channels, a minimum 50-foot wide native plant buffer will be established along each bank of the channel. Reed canary grass will be stripped off and removed and the buffer will be mulched and seeded with a wetland seed mix and planted with native trees and shrubs.

4. Passive recreational enhancements associated with the Springwater Corridor Trail.

Viewpoints and interpretive signage are proposed to be installed at two locations on the Springwater Corridor Trail to provide educational opportunities as well as fish and wildlife viewing: 1) near the new culvert; and 2) near the Oaks Park pedestrian ramp to the trail. The viewing platforms will provide the additional benefit of separating wildlife watchers from people riding bicycles and running.

Construction access to the project site will require the placement of temporary access ramps, partially located within the wetland, and a barge landing pad, located in the Willamette River.

Equipment will gain access to the site via barge through the landing pad and access ramps.

Spoils will be hauled off-site via barge and taken to an approved upland disposal facility. The temporary ramps and barge landing pad will be utilized for access and haul purposes only and will be completely removed and the ground revegetated, where applicable, upon project completion. Utilizing the ramps as access will temporarily close a portion of the Springwater Corridor Trail in the project vicinity for approximately four months (July 1 – October 31, 2018).

The trail will re-open upon project completion.

The placement of the access ramps and other construction activities will also require the removal of 151 trees. Suitable large wood from the removal of trees on-site will be used in the channel or floodplain as large woody debris. Additionally, once construction activities are complete, the site will be revegetated with 4,000 trees and 4,500 shrubs.

The applicant expects the proposed project at Oaks Bottom to increase and/or maintain ecological functions by restoring a more-natural tidal hydrologic regime, improving fish and wildlife passage between the river and the refuge, reducing shallow water ponding and solar heating of water temperatures, managing invasive species, and extensive revegetation with native shrub and tree species.

The proposed project is entirely within the Willamette Greenway and is within River Natural (n), River Water Quality (q), and River General (g) overlay zones. The proposal requires Greenway Review because the project includes changes to the land and structures in the water, including excavations and fills, bridges, and docks.

Relevant Approval Criteria:

In order to be approved, this proposal must comply with the approval criteria of Title 33. The relevant approval criteria are:

Section 33.440.350(A) – For all greenway reviews. The Willamette Greenway design guidelines must be met for all greenway reviews.

Section 33.440.350(C) – Development within the River Natural Zone.

Section 33.440.350(D) – Development on land within 50 feet of the River Natural zone.

Section 33.440.350(E) – Development within the greenway setback.

Section 33.440.350(F) – Development riverward of the greenway setback.

Section 33.440.350(G) – Development within the River Water Quality overlay zone.

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ANALYSIS

Site and Vicinity: The Oaks Bottom Wildlife Refuge is a 160-acre floodplain wetland area located along the east bank of the Willamette River at approximately river mile 16 in southeast Portland, Oregon. The Refuge is surrounded by residential development to the north and east, Sellwood Park to the south, and Oaks Amusement Park, houseboats, and the Willamette River to the west.

Additionally, the project site is within the tidal reach of the Lower Willamette River, where freshwater outflows are backed up by tidal flows in the Columbia River. Daily freshwater tidal fluctuations average around two feet in the project area. The project site is also within the 100-year floodplain of the Willamette River. The Wildlife Refuge is owned and operated by PP&R.

Greenway Resources: There are two designated habitat areas at this location. These are identified as Sites 21.1A and 21.1B in the Lower Willamette River Wildlife Habitat Inventory. Both sites are designated as Rank I Habitat Areas. Sites with such rankings are noted as generally having an extremely significant combination of features which attract a diverse array of wildlife.

These sites are essentially natural in character, although some disturbances (natural or human) exist at these sites. At this time, the Oaks Bottom Wildlife Refuge is a 160-acre floodplain wetland area, with an assortment of wetland types including, open water, forested, and emergent.

Zoning: The zoning designation on the site includes Open Space (OS), Residential Farm/Forest (RF), Residential 5,000 (R5), and Residential 2,500 (R2.5) base zones, with Alternative Design Density (a), Design (d), River General (g), River Natural (n), and River Water Quality (q) overlay zones.

The Open Space base zone is intended to preserve public and private open and natural areas to provide opportunities for outdoor recreation and a contrast to the built environment, preserve scenic qualities and the capacity and water quality of the stormwater drainage system, and to protect sensitive or fragile environmental areas. The provisions of this zone allow this use; these provisions are not specifically addressed through this Environmental Review.

The RF zone is intended to foster the development of single-dwelling residences on lots having a minimum area of 52,000 square feet. Newly created lots must have a minimum density of 1 lot per 87,120 square feet of site area. The provisions of this zone allow this use; these provisions are not specifically addressed through this Environmental Review.

The R5 zone is intended to foster the development of single-dwelling residences on lots having a minimum area of 3,000 square feet. Newly created lots must have a minimum density of 1 lot per 5,000 square feet of site area. The provisions of this zone allow this use; these provisions are not specifically addressed through this Environmental Review.

The R2.5 zone is intended to foster single-dwelling residences. The minimum density for new lots in this zone is 1 unit per 5,000 square feet and the maximum density is 1 unit per 2,500 square feet. Both detached and attached single-dwellings are allowed. The provisions of this zone allow this use; these provisions are not specifically addressed through this Environmental Review.

The Alternative Design Density overlay zone is intended to allow increased density that meets design compatibility requirements. It fosters owner-occupancy, focuses development on vacant sites, preserves existing housing stock, and encourages new development that is compatible with the surrounding residential neighborhood. The regulations of this zone do not apply to this proposal; these provisions are not specifically addressed through this Environmental Review.

The Design overlay zone promotes the conservation and enhancement of areas of the City with special historic, architectural or cultural value. New development and exterior modifications to existing development must meet the Community Design Standards (Chapter 33.218) or are subject to design review. The regulations of this zone do not apply to this proposal; these provisions are not specifically addressed through this Environmental Review.

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The Greenway overlay zone is intended to protect, conserve, enhance, and maintain the natural, scenic, historical, economic, and recreational qualities of lands along Portland's rivers; establish criteria, standards, and procedures for the development of land, change of uses, and the intensification of uses within the greenway; and implement the City's Willamette Greenway responsibilities as required by ORS 390.310 to 390.368 and Metro’s Title 3. The purpose of this land use review is to ensure compliance with the regulations of the greenway overlay zones.

Impact Analysis and Revegetation and Monitoring Plan: The following discusses development alternatives that were considered by the applicant. The following additionally describes the proposed construction management plan, and revegetation and monitoring proposal.

Development Alternatives:

Haul Routes – two options

1. Via barge (or rail), installation of temporary barge landing pad and access ramps, restricted access on Springwater Corridor Trail, and staging near existing railroad (preferred alternative). This option minimizes use of trucks in favor of barges and possible use of railcars as primary means of transporting materials to and from the construction area and minimizes total staging areas. The details of this option are discussed below:

Construction of temporary barge landing pad and access ramps on both sides of the railroad berm to allow construction traffic between barge pad and restoration site;

Excavated material to be removed by barge or rail reduces overall project footprint and minimizes truck trips on Springwater Corridor Trail and city streets;

Overall closure of Springwater Corridor Trail (only a small segment will be closed during construction) will be minimized by limiting traffic on the trail and maintaining public pedestrian/bike access to Oaks Amusement Park;

Less repaving of Springwater Corridor Trail needed since only light vehicles would be allowed on the trail;

Additional temporary disturbance (2,500 cubic yards) and tree removal required on river-side of Springwater Corridor Trail for ramp.

2. Haul route via public or private roads. This option includes use of trucks as primary means of transporting materials to and from the construction area. The details of this option are discussed below:

Approximately 1,000 truck trips to/from the project site would require the closure of the Springwater Corridor Trail between SE Spokane Street and SE Grand Avenue. A Value Engineering study of the project determined that the Springwater Corridor Trail would be significantly damaged due to truck traffic. The trail was also deemed too narrow in areas, and the active private rail line would need to be utilized to accommodate construction traffic. Approval from the private rail line would likely not be approved;

An easement to utilize Oaks Park Way (a private roadway) would minimize disturbance on the Springwater Corridor Trail, but would likely not be approved;

Trails within Oaks Bottom Wildlife Refuge would be closed during construction.

Staging Areas – two options

1. Area adjacent to the railroad line (preferred alternative). The project team identified a smaller area (approximately 0.25 acres) adjacent to the railroad and existing access road. The details of this option are discussed below:

Area is disturbed and not part of the Wildlife Refuge (currently grass);

This option would allow the Springwater Corridor Trail between SE Spokane and Oaks Amusement Park to remain open to people for the duration of the project (with flagging when needed);

Allows the contractor to access the private rail line, if approved by the owner;

No additional vegetation removal required.

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2. South fill area –An approximately 0.25 acre area within the Oaks Bottom Wildlife Refuge.

The details of this option are discussed below:

Use of south landfill area for staging and materials storage may affect planning for landfill remediation;

Would likely require temporary utility relocation (electric line), but gas line and water line cannot likely be relocated, so access is narrow and difficult;

Additional tree removals and vegetation clearing in wildlife refuge;

Public trails within the refuge would be closed for the duration of the project.

Haul Route Option 1 combined with Staging Area Option 1 was selected as the preferred alternative given they are both feasible options which minimize cost and overall impacts to the greatest extent practicable. This alternative minimizes the overall disturbance footprint and avoids most of the noise, road closures, truck and equipment traffic, and road damage in the residential neighborhood and streets along SE Spokane Street and vicinity that would occur under Options 2. This option also minimizes total temporary construction-related disturbance, avoids road closures and road damage to SE Oaks Park Way, and minimizes disruption of access for the public to Oaks Amusement Park and Oregon Yacht Club residents. This option also likely reduces the closure time for the Springwater Corridor Trail by limiting use of the trail for construction purposes, avoids disturbance in the south landfill area, and allows the Oaks Bottom Bluff Trail and trails from Sellwood Park to the south end of Oaks Bottom to remain open.

Construction Management Plan: Construction impacts and project duration will be avoided and minimized by confining construction footprints, equipment, materials, and access routes to the immediate zone around the culvert and the tidal slough channels, thus minimizing construction impacts to less than 7.5 acres. Erosion control fencing will be installed to clearly delineate construction zones from areas that will be left undisturbed. Construction equipment, excavated soils, and other excavated materials will be removed from the site via barge (possibly supplemented with rail) to avoid noise, road and trail damage, diminish disruption of traffic, and reduce the duration required for trail and railroad closure by limiting use of the Springwater Corridor Trail.

The barge landing pad will be constructed first, allowing equipment and material access to the restoration site. Materials for the temporary access ramps will be brought in via barge and placed from the landing pad to the top of the west side of the railroad berm and then to the top of the east side of the berm. Material may also be transported from west side to east side of the berm with a conveyor system, or through the open cut in the berm. The Springwater Corridor Trail will not be used to haul heavy equipment and fill materials, but will likely be used for transport of light equipment and materials that comply with the gross vehicle weight rating.

The access ramps themselves will be the primary access points between the work areas on the site. The access ramps will be constructed by placing separation geotextile fabric in the footprint of the ramps. Compacted earthen fill will then be placed on the fabric to the required thickness;

two to four inch diameter ballast rock will be placed on top the earthen fill to a thickness of six inches, completing the installation of the temporary ramps. Sediment control will be placed at the toe of the ramps to ensure sediment and/or runoff is prevented from leaving the project area and entering adjacent waterbodies.

Equipment needed for project activities include a crane to install the pre-cast culvert segments and sheet piles (by use of vibratory hammer), an excavator, two to three 10-yard tracked dump trucks, a small tug boat and barge, a backhoe, a small bulldozer, and light trucks. The use of tracked dump trucks is proposed in the wetland area as they exert low ground pressure and are made for working in wetlands or otherwise sensitive areas. A small, tracked bulldozer will be used at project completion to de-compact soils and ready them for planting. A geotechnical engineer will test soils to ensure that required levels of compaction, consistent with City standards and detailed in the design specifications, are achieved.

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Impacts to the Springwater Corridor Trail would be minimized by using a barge as the primary source for importing and exporting materials. This approach also minimizes truck traffic through the neighborhoods surrounding the work area. The barge will be moored offshore of the landing area by use of spuds, which are metal legs that will extend down to the river bottom. A metal ramp will extend from the barge to the bottom of the access ramp to allow ingress and egress to the barge.

Excavated spoils will be transported from the work area to the barge either by driving the tracked dump trucks onto the barge and tipping the materials directly onto the barge, or by offloading the materials from the dump trucks onto a conveyor that will convey the materials to the barge.

The barge will be leak proof, and will provide ample freeboard such that materials will not be able to spill out of the barge while it is being towed to the off-loading area. The barge will likely be off-loaded at the Ross Island Sand and Gravel Company ramp located just upstream of the Ross Island Bridge, then transported by truck or rail to an appropriate, licensed landfill with capacity to accept the projected amount of spoils. At the end of the construction phase, the barge, the barge landing, and the access ramps will be removed in a similar fashion to the installation.

The eastern berm will be removed first, the western berm second, and then the barge landing pad. The soils will then be de-compacted, and the disturbed areas restored and revegetated.

Trees at Oaks Bottom Wildlife Refuge are generally found in dense clusters in the scrub-shrub and riparian forest areas. Most of the trees are in good health, but even dead and declining trees provide good wildlife habitat and are an important element of the floodplain ecosystem. Most trees being removed as part of this project will be used either as large woody debris or left as standing snags. Trees that are not being removed will be protected using the measures listed below:

4-foot high orange plastic mesh fencing secured with 6-foot metal posts will be installed at the perimeter of the disturbance areas;

Additional fencing will be placed around root protection zones (RPZ) for trees to remain that are outside the work limits but whose RPZ’s encroach into the work area;

No work activities are allowed beyond the orange construction fencing unless approved by the City’s Urban Forester in advance; and USACE inspectors, as well as BES staff, will be on site at all times…