PW1615-25 - Addendum 1.pdf

PW1615-25 - ITB - Construction of Salmon Falls Park Habitat Enhancement Page 1 of 3

ADDENDUM #1

TO THE

INVITATION TO BID

PW1615-25 - ITB - CONSTRUCTION OF SALMON FALLS PARK HABITAT

ENHANCEMENT

ISSUED ON 2/17/2025 9:00:00 AM

The following information in this addendum, hereby become part of the Invitation To Bid. It is essential that all prospective Offerors note the content of this Addendum.

A. Exhibit 7 – Special Provisions: Update the following information

i. Remove existing Professional of Record Certification and Replace with the attached.

ii. SECTION 01030 – SEEDING

Comply with Section 01030 of the Standard Specifications modified as follows:

01030.13(f) Types of Seed Mixes - Add the following to the end of this subsection:

Provide the following seed mix formulas:

Botanical Name PLS Specified Rate Triticum aestivum x Elytigia elongata 35-40 (lb/acre) (Common Name) (Regreen) (or as recommended by supplier)

01030.15 Mulch – Delete “or plant seeds” from first sentence.

Add the following paragraph and bullets to the end of this subsection:

Furnish mulch slurry for seeding according to the following:

• Standard hydromulch (per 01030.48(3))

• Tackifier (per 01030.16)

• Ecobiotics Plus (per 01030.47)

• Regreen (per specified rate)

iii. SECTION 00280 – EROSION AND SEDIMENT CONTROL

00280.00 Scope - Replace “1200-CA” with “1200-CN” in the paragraph that beings with “This Work…”.

Delete the paragraph that begins “When contaminants, pollutants or hazardous materials…”.

Add the following paragraph to the end of this subsection:

Marion County’s NPDES 1200-CAN permit is applicable to the Project.

00280.04 Erosion and Sediment Control Plan on Agency Controlled Lands - Replace the bullet that begins “Information required under 1200-CA…” with the following bullet:

Information required under 1200-CN permit, if applicable.

iv. SECTION 00290 – ENVIRONMENTAL PROTECTION

00290.30(a)(8) Turbidity Monitoring - In addition to the requirements of 00280.62(c) to monitor the receiving stream to identify water quality issues, during Work in waters of the State or U.S., implement best management practices (BMPs) to minimize turbidity and monitor turbidity according to the following:

• Every four hours, make observations at an upcurrent location outside the influence of the Project, and at a downcurrent location representative of turbidity caused by the Project.

• Document all turbidity monitoring observations including date, time, and location on form 734-2755, “Turbidity Monitoring Report” or another form approved by the Engineer. Submit reports to the Engineer weekly while working aroundin waters of the State or U.S. and keep copies of the reports at the Project Site.

• A visible downcurrent turbidity plume emanating from the work area requires a presumption that project-caused turbidity is more than 10% above the upcurrent background level and is therefore in violation of DEQ’s turbidity water quality standard (OAR 340-041-0036), unless turbidity meter analyses of samples taken from an upcurrent location and from a location within the visible plume show that the actual turbidity increase is no more than 10% above the upcurrent background level.

• If observations indicate that the Project has increased turbidity to more than 10% above the upcurrent background level, modify work procedures and repair or upgrade BMPs.

If turbidity is still more than 10% above the upcurrent background level at the next four-hour observation, stop turbidity-causing Work and repair or upgrade BMPs.

Resume such Work when downcurrent turbidity returns to no more than 10% above the upcurrent background level.

v. SECTION 00305 – CONSTRUCTION SURVEY WORK

Comply with Section 00305 of the Standard Specifications modified as follows:

00305.00 Scope – Add the following paragraph at the end of this section:

Project site is located outside of cellular service. Connecting to a network is not available.

00305.90 Payment – Replace this subsection except for title and number with the following:

No separate or additional payment will be made for work performed under this section.

B. Civil Engineering Construction Plans: Remove and Replace with the attached.

Remove:

C000 Civil Engineering Construction Plans

C050 1200-CN EROSION AND SEDIMENT CONTROL PLAN

Replace with:

C000 Civil Engineering Construction Plans

C050 1200-CA EROSION AND SEDIMENT CONTROL PLAN

EXHIBIT 7

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SALMON FALLS PARK HABITAT ENHANCEMENT

CIVIL ENGINEERING CONSTRUCTION PLANS

VICINITY MAP

SITE MAP

PROJECT RECORD DRAWING

CIVIL ENGINEERING/

SURVEYING/LAND USE

PLANNING/LANDSCAPE

ARCHITECTURE FIRM OWNER

PROJECT LOCATION VERTICAL DATUM

ATTENTION EXCAVATORS

PROJECT ADDRESS

Know what's below.

before you dig.Call

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LEGEND

SHEET INDEX

DIGITALLY SIGNED

1200-CA EROSION AND SEDIMENT CONTROL PLAN

SITE MAP

VICINITY MAP

ATTENTION EXCAVATORS:

RATIONALE STATEMENT

SALMON FALLS PARK HABITAT ENHANCEMENT

Know what's below.

before you dig.Call

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INSPECTION FREQUENCY:

PROJECT LOCATION

PROPERTY DESCRIPTION

CIVIL ENGINEERING / SURVEY FIRM

DEVELOPER/APPLICANT

NARRATIVE DESCRIPTIONS

CONTRACTOR

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SHEET INDEX

CONTROL PLAN DRAWING NOTES:

STANDARD EROSION AND SEDIMENT

LOCAL AGENCY-SPECIFIC EROSION CONTROL NOTES:

DIGITALLY SIGNED