Project Information

Bid Title

RFP - Pattison Lake Management District – Lake Cyanobacteria Management Plan Development

Issuing Agency

Thurston County

Location

Washington

Published Date

May 20, 2026

Closing Date

Jun 30, 2026

Government Level

State & Local

Status

Closed

Original Source

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Bid Documents

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Project Description

Department	Description	Opening Date	Closing Date	Attachment(s)
PHSS	RFP - Pattison Lake Management District – Lake Cyanobacteria Management Plan Development	05/19/2026	06/30/2026 by 4:00PM	RFP Packet RFP Technical Memorandum

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Thurston County, Washington

Public Health and Social Services Department

Environmental Health Program

3000 Pacific Avenue SE

Suite 225

Olympia, Washington 98501

REQUEST FOR PROPOSAL (RFP) NO. _____________:

PATTISON LAKE MANAGEMENT DISTRICT

Lake Cyanobacteria Management Plan (LCMP) Development

Solicitation Documents

RFP Issuance Date: May 19, 2026

All solicitation documents, including any addenda, are published on the Thurston County website at

https://www.thurstoncountywa.gov/tchome/Pages/rfprfq.aspx.

Proposal Due Date

Proposals are due: 4:00p.m. PST on: June 30, 2026

Proposal Acceptance Location

Proposals will be received by:

Thurston County Public Health & Social Services Department

Environmental Health Program

3000 Pacific Avenue SE Suite 225

Olympia, Washington 98501

Office Hours: 8am-4pm Monday through Friday

Kimberly Graham, email: EH_LMD@co.thurston.wa.us

Thurston County reserves the right to reject any and all proposals, cancel this solicitation, and to waive

any informalities or irregularities in procedure.

1

RFP NO. XXX-XXXX-XX-XXXX

Pattison Lake Cyanobacteria Management Plan Development

Pattison Lake

Lake Cyanobacteria Management Plan Development

Table of Contents

SECTION 1 INTRODUCTION AND PURPOSE ...........................................................................3

SECTION 2 OVERVIEW OF SERVICES REQUESTED..................................................................4

SECTION 3 – ACQUISITION TIMELINE AND GENERAL REQUIREMENTS.....................................7

SECTION 4 - PROPOSAL PREPARATION AND SUBMISSION INSTRUCTIONS .............................9

SECTION 5 - EVALUATION AND SELECTION ......................................................................... 12

SECTION 6 CONTRACT TERMS AND CONDITIONS ................................................................ 14

SECTION 7 FORMS ............................................................................................................. 15

ATTACHMENT 1 PRICE SCHEDULE (Bid Sheet) ..................................................................... 16

ATTACHMENT 2 - STATEMENT OF WORK ............................................................................. 17

ATTACHMENT 3 - PROFESSIONAL SERVICES CONTRACT (PDF attached separtely) ............... 19

SCOPE OF SERVICES......................................................................... Error! Bookmark not defined.

ATTACHMENT 4-A PROJECT/SERVICES EXPERIENCE ........................................................... 19

ATTACHMENT 4-B PROPOSER REFERENCE SHEET ............................................................... 20

ATTACHMENT 5 - KEY PERSONNEL RESUME FORMAT...........................................................21

ATTACHMENT 6 CERTIFICATION.........................................................................................22

ATTACHMENT 7 TECHNICAL MEMORANDUM ON HISTORICAL DATA ..................................... 24

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RFP NO. XXX-XXXX-XX-XXXX

Pattison Lake Cyanobacteria Management Plan Development

SECTION 1 INTRODUCTION AND PURPOSE

1.1 INTRODUCTION

Thurston County’s Department of Public Health & Social Services, Environmental Health Division and the, Pattison

Lake Management District Program (PLMD) is seeking a qualified aquatic specialist to create a complete

Integrated Lake Cyanobacteria Management Plan (LCMP) for Pattison Lake. The LCMP will be developed using the

results of a thorough study of the lake including work done by the County through regular water sampling and by

the LMD through sampling in 2024 and inflow and outflow analysis in 2025.

Overall goal of this project is to restore the ecological health of Lake Pattison by reducing eutrophication and algal

blooms. This will be achieved through measurable objectives including:

1) Contract for the development of a Lake Cyanobacteria Management Plan (LCMP) to be completed in the

FY2026-2027 time period.

2) Update and quantify phosphorus and other nutrient input sources impacting Pattison Lake water quality.

3) Reduce phosphorus inputs to lake from sources identified in the LCMP.

4) Reduce annual average Total Phosphorus to levels recommended in the LCMP through use of

recommended management tools.

5) Decrease cyanobacterial toxin events above state recreational guidelines to the lowest frequency

possible, ideally to zero, through use of techniques recommended in the LCMP and included in the PLMD

action plan.

6) PLMD funds availability will be managed to meet these objectives to the maximum extent possible over

the period of PLMD operations.

To complete the LCMP, the contractor is expected to:

• Review all available Washington State Department of Ecology and Thurston County Environmental Health

data on water quality for the lake, most of which has already be done in 2025 under the inflow/outflow

contract and contained in a technical report by Herrera, Attachment 7.

• Provide an addendum to the existing Quality Assurance Project Plan (QAPP) before any new sampling

work begins. The QAPP will guide the study design, sample collection, field and laboratory analyses, data

analyses, quality assurance, and reporting activities following ECOLOGY's Guidelines for QAPP for LCMPs.

A draft QAPP has been submitted to ECOLOGY for review and a final addendum to the QAPP will be

submitted as needed prior to beginning any new work.

• Nutrient source identification beyond work already done in 2024 and 2025 and documented in

Attachment 7:

o Perform a lake and area survey with to identify all possible nutrient sources entering the lake that

could impact lake eutrophication.

o Identify and address Phosphorus and Nitrogen nutrient sources throughout the lake ecosystem to

mitigate eutrophication.

o Identify impact of aquatic plant vegetation on increasing nutrient sources.

o Sample water and sediment from key sources entering the lake ecosystem and already in the lake

ecosystem to determine extent of nutrient load to the lake ecosystem from each source. This will

require core sampling in the deepest parts of both lake basins and analysis of both suspended and

total phosphorus at various depths.

o Identify impact of non-migratory waterfowl on lake ecosystem to determine extent of nutrient

load to the lake ecosystem.

o Identify impact of public access points (e.g., WDFW boat launch) to the lake ecosystem.

o Identify impact of septic systems, fertilizer and other chemicals used by residents throughout the

watershed to determine extent of nutrient load to the lake ecosystem.

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RFP NO. XXX-XXXX-XX-XXXX

Pattison Lake Cyanobacteria Management Plan Development

Plan development will include attending at least two meetings with PLMD Steering committee members, one of

which will be designed to facilitate a public meeting for input on plan development and problem solving as issues

arise, and consulting with staff from Environmental Health LMD Management Program. When the study is

complete, the contractor will provide their draft findings and recommendations to the PLMD Steering Committee

at a public meeting and subsequently provide a final written report to the PLMD Steering Committee leaders in a

pdf format. It will include reports and findings, plus detailed recommended mitigation, and treatment options for

each type of nutrient source that can be managed so that subsequent efforts can be taken by the PLMD to

mitigate and hopefully reverse eutrophication.

1.1 PURPOSE

Excessive weed growth and algae blooms have become increasingly problematic over the past 30 years. The lake

has transitioned from Mesotrophic to Eutrophic over that time period. Dissolved Oxygen levels have fallen

resulting in increased incidents of toxic algae blooms and unsatisfactory levels for fish habitat. At times during the

year, lake residents and visitors are prevented from enjoying the beneficial uses of the lake. It is anticipated that

the study will begin in August 2026 and the plan will be completed by March 31, 2027 (assuming 8 months to

develop the plan, including use of previous work already done). To capture watershed and in lake nutrient

sources, it is anticipated the study will require lake sampling at various times throughout the period which is being

provided by Thurston County on a monthly basis in both the north and south basins.

1.2 MINIMUM QUALIFICATIONS

Contractor shall have the following minimum qualifications to be eligible for an award:

A. Documented current licenses, endorsements, qualifications, insurance, and proven experience in

developing phosphorus management plans.

B. Experience and expertise in aquatic surveying, mapping and sampling. Ability to meticulously collect data

on types, extent, and distribution of weeds, collect and analyze water samples and core sampling of

sediment to the extent needed beyond what has already been done.

C. Knowledge of components of an LCMP that meets the requirements of Washington’s Department of

Ecology. Additionally, this plan will encompass strategies to address management of all significant sources

of nutrients and regulation of nutrient input, mitigate water quality concerns, and enhance the overall

ecological health of the lake most effectively.

D. Skills to lead and make professional presentations at public meetings to engage lake residents in

development of the LCMP.

1.4 PROCUREMENT NOTIFICATION

This project is a formal competitive procurement and will be advertised in the Nisqually Valley News” and is open

to all qualified companies. All solicitation documents, including any addenda, are published on the Thurston

County website at https://www.thurstoncountywa.gov/tchome/Pages/rfprfq.aspx.

SECTION 2 OVERVIEW OF SERVICES REQUESTED

2.1 PROJECT DESCRIPTION

The Contractor will provide all management, materials, equipment, supplies, labor, and other items necessary for

sampling and documentation. Sediment testing will be part of the lake study. Contractor is responsible for all

permits and compliance with all rules and regulations. Contractor will work directly with the PLMD Steering

Committee and if needed the Environmental Health POC, Stuart Whitford, or Kimberly Graham or other designee.

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RFP NO. XXX-XXXX-XX-XXXX

Pattison Lake Cyanobacteria Management Plan Development

2.2 BACKGROUND INFORMATION.

Pattison Lake is a Puget Sound lowland lake at an elevation of 154 feet above mean sea level. It is located

southeast of Olympia in an unincorporated part of Thurston County and is in the Urban Growth Area of the city of

Lacey. It is divided into north and south basins by a railroad trestle and is the second in a series of four lakes. Hicks

Lake drains into Pattison, which drains into Long Lake. The outlet for Long Lake flows through Lois Lake and

ultimately becomes Woodland Creek, a tributary to Henderson Inlet. The lake is part of the Henderson Inlet

watershed. Water also enters Pattison Lake via groundwater seeps, direct precipitation onto the lake, and

stormwater runoff within the watershed.

Specific properties of the lake:

• Shoreline length: 6.3 miles

• Lake size: 0.42 square miles (270 acres), 80 acres in the North Basin and 190 acres in the south basin

• Mean depth: 4.0 meters (13 feet)

• Maximum depth: 6.7 meters (22 feet)

• Volume: 3,600 acre-feet

Pattison Lake is a popular recreation area used for fishing, swimming, and boating (under 5 mph) by locals and the

public through a Washington Department of Fish and Wildlife boat launch in the south basin.

Nutrient Loading: The relative magnitude of phosphorus loading from various sources was quantified through

detailed nutrient analysis of existing data and documented in Table 1 of Attachment 7.

Continued water quality monitoring has been conducted by Thurston County Public Health & Social Services,

Environmental Health that shows the eutrophic state of the lake. In 2004, Pattison Lake was designated as a

303(d) impaired water body due to elevated total phosphorus levels. Toxic Algae blooms have exceeded the

advisory level of concern in all 3 of the last three years. General water quality has deteriorated from fair to a

rating of poor in 2023 per Table 1 below.

Summary of past studies within the Pattison Lake Watershed including results of treatments conducted in the

1980’s are documented in Table 2 of Attachment 7.

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RFP NO. XXX-XXXX-XX-XXXX

Pattison Lake Cyanobacteria Management Plan Development

Commodity Codes

• NAICS 541330Engineering Services
• NAICS 541611Administrative Management and General Management Consulting Services

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