00000613 ITB_ADDENDUM.docx

INVITATION TO BID

ADDENDUM NO. 1

Requests for clarification, requests for change, and protests of this Addendum are due no later than:

September 6, 2021 at 4:00 pm.

This Addendum modifies the Invitation To Bid (ITB) document(s) only to the extent indicated herein. All other areas not changed or otherwise modified by this Addendum remain in full force and effect. This Addendum is hereby made an integral part of the ITB document. Bidder must be responsive to any requirements of this Addendum as if the requirements were set forth in the ITB. Acknowledge receipt of this Addendum by indicating its number in the spaces provided ITB Section H – Addenda Acknowledgement. Failure to do so may result in Bid rejection. See the ITB regarding pre-opening modifications of Bids, where to send Bid modifications, requests for clarification or change and protests of this Addendum, and the deadlines for the foregoing.

THE PURPOSE OF THIS ADDENDUM IS TO:

1. Add Temporary Seeding Bid Item

2. Add SECTION 01030 – SEEDING to the Special Provisions.

Add the following to the Specifications:

SECTION 01030 - SEEDING

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

01030.13(c) Pure Live Seed ‑ Replace this subsection, except subsection number and title, with the following subsection:

Use the PLS specified rate listed in 01030.13(f) for determining PLS application rates. Ensure the PLS application rate meets the PLS specified rate. Apply pre blended seed mixes, with multiple species, at a PLS application rate ensuring all species meet or exceed the PLS specified rate for each species in the seed mix.

PLS application rate for an individual seed species is determined as follows:

PLS specified rate is listed in 01030.13(f) PLS factor is obtained by multiplying the seed label germination percentage times the seed label purity percentage. Use the purity and germination percentages from the label on actual bags of seed to be used on the Project.

PLS application rate is obtained by dividing the PLS specified rate by the PLS factor.

For a seed mix, make this calculation for each seed species in the mix and then adjust as follows:

Using the seed tag, determine the weight of each seed species in the bag and use this information to find the percentage, by weight, of each seed species is in 1 pound for the pre-blended mix.

Divide the percentage by weight of each seed species, per pound, for the pre-blended mix, by the PLS application rate for that specific seed species.

Determine the highest application rate in the seed mix and apply the seed mix at that application rate.

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

Provide the following seed mix formulas:

Temporary Seeding:

*Festuca rubra ‘Eureka II’’ (Eureka II creeping red Fescue) 102 *Lolium perenne ‘Stellar’ (Stellar perennial) Ryegrass) *Festuca rubra ‘Compass II’ (Compass II Chewing’s Red Fescue) 102

* Oregon Certified Seed

01030.13(g) Availability ‑ Add the following sentence to the end of this subsection:

Submit the seed and seed mixes to be used on the project according to 00150.37.

01030.15 Mulch - Add the following paragraph and bullets to the end of this subsection:

Furnish mulch for seeding according to the following:

Compost Mulch (medium type)

01030.40 General ‑ Add the following sentence after the sentence beginning “Notify the Agency…”:

Notify the Agency of the acreage to be seeded at least 7 Days before seeding begins.

Add the following subsection:

01030.43(c) Seed Application Rates ‑ Determine the seeding application rate according to 01030.13(c). Apply seed mixes at the highest application rate calculated to provide not less than the specified application rate for each individual seed species in the mix.

Replace the existing Specifications Supplemental Special Provisions Number shown with the language below:

16f. Boulders placed on slopes of 2:1 will also be grouted. Grout to have a smooth appearance after placement. Grout to extend up 1/3 the height of the boulders and a minimum distance of 1 foot around the boulders.

ITB_ADDENDUM, S006-G031521

image1.wmf