2026-026 IFB Dyes Inlet Bulkhead Removal Rebid

DYES INLET LAGOON ARMOR REMOVAL
Kitsap County Department of Community Development
SPECIAL PROVISIONS
(TECHNICAL SPECIFICATIONS)
Prepared by
Natural System Design
Revised June 8, 2026

KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
1 GENERAL REQUIREMENTS AND DEFINITIONS
1.1 General Requirements
The project specifications presented here as Special Provisions define work scope and minimum requirements
associated with the implementation / construction of the proposed Dyes Inlet Shoreline Restoration Project.
The Special Provisions provided in the following sections supplement the WA Department of Transportation
Standard Specifications listed below (referred to as WSDOT thereafter), with new, replaced or modified
requirements specific to this project.
WSDOT Specification: Standard Specifications for Road, Bridge, and Municipal Construction (M 41-10),
WA Department of Transportation, 2025.
This project specifications supplement and further explain design notes presented on Contract Plans. They do
not replace or modify design sheet notes.
In addition, Contractor shall refer to permit documents for all permitting conditions and constraints and other
regulatory requirements.
1.2 Definitions
A. PROJECT: Dyes Inlet Lagoon Armor Removal Project
B. WORK: As defined in Section 1.3
C. KCCD: Kitsap County Department of Community Development
D. KCPW: Kitsap County Department of Public Works
E. PM: Project Manager from KCCD, or PM assigned representative
F. Owners: Landowners of properties
G. Contractor: Contractor awarded construction of project
H. Contractor PM: Contractor's project manager responsible for project planning, oversight, QC/QA, and
the point of contact for the contractor
I. Consultant: Natural System Design, Inc. (NSD)
J. Engineer: NSD Project Engineer/Engineering Geologist, or Engineer assigned representative
K. Contract Plans / Sheet(s): Final Design Plan Set / Sheet(s)
1.3 Project Work Scope
A. The project WORK consists of furnishing all construction, labor, equipment, and materials, and
performing all operations in connection with the construction as detailed on Contract Plans, Bid
Schedule and as summarized in Contract Document.
B. The scope of the WORK includes the following main project elements:
a. Site preparation and TESC/SWPPP installation.
b. Removing existing shore armor, including rock wall, concrete rubble, wood pilings and laggings, etc.
per Sheet 5 and Sheet 6. Retaining/reforming two rock sills per Sections A and B, Sheet 11 and field
instruction. Salvage, haul, stockpile and/or disposal of materials as required.
c. Constructing rock retaining wall and return wall with onsite salvaged rock, per Sheet 8 and relevant
section details.
d. Excavating and grading shore bank.
e. Installing cobble toe and gravel-sand beach nourishment to design grade, per Sheet 7 and Sheet 8.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
f. Import topsoil/compost and prepare planting bed per landscape plans.
g. Mulch pedestrian paths per landscape plans.
h. Import and stockpile mulch onsite.
i. Install habitat logs.
j. Final site cleanup and restoration
1.4 Job Measurement and Payment
A. Measurement of lump sum bid items will be based on the value of work completed/incorporated
relative to the value of work remaining under the bid item. Payment shall be made based on the
contract price and the measurement, which includes all labor, material, equipment and other incidentals
required to complete the work. Any estimated quantity provided for a Lump Sum bid item in the Bid
Form is approximate, estimated based on available survey data, field observations, and rough volume
calculations in CAD. Quantities are provided for reference to the Contractor for bidding purposes. The
contractor shall verify the quantities with their own estimate and calculations.
B. Measurement of unit price bid items for imported materials shall include costs for both material and
transport to site. For this project, other costs associated with material installation or placement are
included in separate bid items unless otherwise stated in this specifications document or in the bid
form. The quantity for payment is based on the volume/weight or other defined measuring unit with the
support of weight tickets from the pit/quarry site or receipts from supplier, and adjusted by the
percentage or quantity of the material actually installed or consumed. Material quantity adjustment
must be pre-approved by the PM or Engineer or requested by the Engineer. Any quantity adjustment if
stated as an estimate (EST.) in the bid schedule, or if within a +/- 20% range will not be considered as a
Change Order, and will be paid, or payment be subtracted by the contract unit price.
C. Measurement of unit price or lump sum price bid items for non-usable material removal and
recycling/disposal or other construction items shall include all necessary costs for material, labor,
transport, and recycling/disposal unless otherwise specified on the bid form. Payment for unit price
based bid items shall be made based on the contract unit price and the quantities supported by weight
tickets or receipts from qualified waste sites, or by field measurements. Payment for lump sum based
bid items shall be made based on the contract lump sum price in accordance with Section 1.4A.
D. The Contractor shall keep a daily record of truck trips and estimated or actual loads for both import and
export materials. Haul-out truck load of rock without weight ticket shall have photos of truck load prior
to leaving the project site.
E. For certain project elements, if imported material cost and labor cost for constructing/installing the
material are bundled as one bid item in the Bid Form, the payment will be made in accordance with
each method of measurement, adjusted by the percentage of the material actually installed or
consumed.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
2 MATERIALS
2.1 General
A. All imported and salvaged materials to be installed or placed for the project shall be pre-approved by
the Engineer prior to construction. For imported materials specification sheets, gradation sheets /
reports, sample materials and/or scaled material photos (with a tape measure placed by the side for
reference) shall be submitted and reviewed prior to large quantity shipment to the project site.
2.2 Rock For Rock Walls
A. All rock materials for rock wall structures shall be hard, rough, and durable angular quarry stones, free
of organic material, infilled joints, seams or other defects.
B. For this project armor rock for rock walls shall be salvaged from removed rockery at the time of existing
rockery removal.
C. Rock sizes for rock retaining wall are indicated on Sheet 12 rock wall detail and on cross-section sheets
(Sheet 10 and Sheet 11). Large 2-man rock and mixed size 3-man angular rock shall be salvaged and
installed as per Contract Plans and Sections. Refer to Table 1 for rock weight and dimension conversions.
Table 1. Rock size per WSDOT 9-13.7(1)
Rock Size Rock Weight (lbs) Average Dimension (inches*)
1-Man Rock 50 to 200 12 to 18
2-Man Rock 200 to 700 18 to 28
3-Man Rock 700 to 2,000 28 to 36
4-Man Rock 2,000 to 4,000 36 to 48
5-Man Rock 4,000 to 6,000 48 to 54
6-Man Rock 6,000 to 8,000 54 to 60
*Average Dimension = (Length + Width + Height)/3
D. In general, more regular armor rocks in shape, such as rectangular, tabular, or cubic are more suitable
rock wall construction. Armor rocks in irregular shape may be used while matching with surrounding
rocks in shape and interlock one other. All qualified rock shall have a shape ratio (defined as the longest
dimension length / the shortest dimension length, or length / height) less than 3. The use of round, thin,
flat, or long and needle-like shapes is not allowed.
2.3 Quarry Spalls for Rock Wall Base and Backfill
A. Quarry Spalls for rock wall backfill shall be angular quarry stones with sizes of 3" - 8". Quarry spalls shall
be salvaged from the base and the back of the existing rock wall after the armor stones are removed.
Quarry spalls shall be carefully collected to keep them free of dirt and other foreign material.
B. The gradation for quarry spalls shall in general meet WSDOT 9-13.1(2) requirements as shown in Table 2
below, or approved by the Engineer.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
Table 2. Quarry spalls gradation, per WSDOT 9-13.1(2) (all percentages are by weight)
Sieve Size/Number Percent Passing
8" 100%
3" 40% max
34" 10% max
2.4 Geotextile
A. Geotextile material shall meet WSDOT 9-33.1 specifications. The geotextile for rock wall base and back
shall be non-woven with minimum grab tensile strength 250 lb. The recommended geotextile grade for
this project is Mirafi(TM) 1100N or equivalent approved by the Engineer.
2.5 Beach Cobble for Cobble Toe
A. Beach Cobble for cobble toe shall be free from dirt, clay, rock fines, fractured rock, and other foreign
materials. Beach cobble shall not contain organic matter considered objectionable by the Engineer.
B. Beach cobble shall be naturally occurring rounded rock, free of thin, flat and elongated pieces. Beach
cobble shall be sound, durable rock with less than 15% by weight having any cleavage or fractures.
Aggregates from rock quarries, ledge rock, and talus slopes are not acceptable for beach cobble.
C. Beach cobble shall consist of mixed pebble and cobble with a gradation meeting WSDOT 9-03.11(2), 4-
inch Stream Cobble, as shown in Table 3.
Table 3. Beach cobble gradation, per WSDOT 9-13.1(2) (all percentages are by weight)
Sieve Size/Number Percent Passing
4" 99-100%
3" 70-90%
1-1/2" 20-50%
3/4" 10% max
D. Prior to be placed at the toe of the beach, the imported beach cobble shall be mixed with
approximately 20% of beach quality native bank sediment salvaged from bank excavation onsite. Refer
to 2.5C for salvaging of native bank sediment.
2.6 Beach Nourishment Aggregates
A. All beach nourishment aggregates shall be clean, naturally occurring, and free of debris, wood, and
other organics or deleterious material. Gravel shall be water-rounded, well-graded, and contain no more
than 10% fractured rock by weight.
B. Pit-Run Gravel Sand Mix:
a. Pit-Run Gravel Sand Mix for Beach nourishment can be directly imported from approved pit,
with some flexibility for its gradation, pre-approved at the discretion of the Engineer. The
gradation shall conform close to 75% of beach quality gravelly sand (Table 4) well mixed with
25% of gravel mixture (WSDOT 9-03.12(5), Table 5).
a. Refer to Section 2.6D regarding the possibility of partially replacing Pit-Run Gravel Sand Mix
with native sediment salvaged from the site.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
Table 4. Gradation of gravelly sand (all percentages are by weight)
SIEVE SIZE PERCENT PASSING
1-1/2" 100%
3/4" 80-100%
1/4" 65-90%
#4 20-45%
#16 0-10%
#100 0-5%
Table 5. Gravel gradation, WSDOT 9-03.12(5) (all percentages are by weight)
SIEVE SIZE PERCENT PASSING
112" 99-100
1" 50-100
34" 0-20
3/8" 0-2
No. 200 0-1.5
C. Coarse Sand: Coarse Sand shall conform to the gradation as specified in Table 6.
Table 6. Gradation of coarse sand (all percentages are by weight)
SIEVE SIZE PERCENT PASSING
2" 90-100%
#4 80-100%
#8 60-85%
#16 20-50%
#50 10-30%
#100 0-4%
#200 0-3%
D. Salvaging Native Bank Sediment
a. Native sediment salvaged from bank excavation shall be beach quality clean gravelly sandy
sediment, free of debris, wood, and other organics or deleterious material.
b. Salvaging native sediment shall be pre-approved by the Engineer or at the discretion of the
Engineer if visual inspection confirms it meets the specification of Section 2.6B.
c. The qualified salvaged native sediment if approved by the Engineer shall be used to replace or
partially replace the Pit-Run Gravel-Sand Mix as specified in Section 2.6B. This will be
determined and notified to the Contractor prior to ordering/shipment of the Pit-Run Gravel-
Sand Mix.
2.7 Wood Strand Much
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
A. If mulch is to be used for covering the construction access path as part of the site preparation and
SWPPP requirements, the imported mulch shall be wood strand mulch. Refer to WSDOT 9-14.5(4) for
specifications.
B. The mulch shall be salvaged and reused for covering the pedestrian paths as part of Bid Item 27.
C. Additional mulch used for SWPPP shall be collected and stockpiled onsite after the project as incidental
to Bid Item 10.
2.8 Wood Chip Mulch
A. Mulch for the planting area may be arborist wood chip mulch 1-2 inch chunks derived from the
mechanical grinding or shredding of whole trees or portions of trees. Composted product or bark may
not be substituted.
B. Wood chip mulch shall be free from weeds, weed seed, deleterious materials, and foreign materials,
resin, tannin, or other compounds detrimental to plant life. Mulch containing any amount of cedar
wood is unacceptable. No construction waste may be included.
C. At least 1-gallon mulch sample is to be presented for approval prior to shipment.
2.9 Topsoil Type A
A. Topsoil for planting areas shall be from accredited sources subject to approval.
B. Topsoil shall consist of 2/3 Sandy Loam conforming to USDA soil texture class "Sandy Loam" certification
and 1/3 composted organic material.
C. Sandy loam shall consist largely of sand, but with enough silt and clay present to give it a small amount
of stability. Individual sand grains shall be of sufficient size to be seen and felt readily. Upon squeezing in
the hand when dry, it shall form a cast that not only holds its shape when the pressure is released but
withstands careful handling without breaking.
D. The mixed soil shall meet the following gradation:
Table 7. Soil gradation.
SIEVE SIZE PERCENT PASSING (BY WEIGHT)
3/8 inch 100%
#4 95%
#10 85%
#30 70%
#60 50%
#100 30%
#270 15%
E. The mixed soil shall have a pH range of 5.0 to 6.5, with dolomite lime added as necessary to attain this
range.
F. Compost for Topsoil Type A shall conform to the material specifications outlined for "Fine Compost" in
Section 9-14.4(8) of the Standard Specifications.
G. The Contractor shall submit the following for approval by KCCD:
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a. 1 gallon bag of imported Topsoil Type A sample
b. Product Certificates and Material Test Reports
c. Delivery Slips: Provide delivery slips as proof of shipment of specified materials.
2.10 Habitat Logs
A. Importing logs is an optional item which shall be determined and pre-approved by the PM.
B. All imported logs shall not be treated with any chemicals and shall be free of rot.
C. The minimum length is 28 FT from end to end, and the diameter shall be over 20", DBH. Logs with
trimmed rootward are preferred.
D. Photos of the sample logs shall be submitted for approval.
3 CONSTRUCTION PLANNING AND PREPARATION
3.1 General Requirements
A. The Contractor shall submit a brief written Construction Work Plan (per Section 3.2) no later than two
weeks prior to the scheduled start of construction. No physical work is to be performed at the site
until the Construction Work Plan is reviewed and approved by PM and Engineer.
B. The Contractor's site preparation shall be checked and approved by PM and Engineer prior to the start
of any actual construction work.
C. The Work Plan, especially project progress status and work schedule revisions shall be updated
weekly. A regular weekly short meeting shall be scheduled. In case of any unexpected schedule
changes, PM and Engineer shall be notified at least 48 hours in advance.
D. The Contractor is responsible for locating, reaffirming any existing underground utility lines prior to
digging.
E. The Contractor shall protect utility boxes, existing drainage system, other permanent infrastructure, and
any specific structures/portion of structures called out to remain within the work area. Damages caused
by construction activities shall be repaired or restored by the Contractor.
F. The Contractor shall protect established landscape, plants and trees within project site. Damages caused
by construction activities shall be repaired or restored by the Contractor.
G. The Contractor shall take into consideration the daily workable low tide window.
H. The Contractor shall work with PM and the Engineer providing oversight on the field and consider their
recommendations and design interpretations, especially for the elements that require field
determination or verification.
3.2 Work Plan, Equipment, and Personnel
A. The Construction Work Plan shall include:
a. A list of key construction personnel and the supervisory chain of responsibility.
b. A list of equipment and manufacturer's specifications.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
c. Implementation procedures, sequence, and estimated schedule of key project elements.
d. Plans/sketches showing construction access, temporary staging, materials stockpiling for both
north and south sites.
e. Brief TESC & SPCC plan, including proposed BMP items, strategies to contain fluids if a hydraulic
line is broken.
f. Proposed waste sites for construction debris disposal/recycling.
3.3 Construction Surveying, Marking and Staking
A. The Contractor is required to participate in a pre-construction site walk-through with PM and the
Engineer.
B. The Contractor shall be responsible for setting, maintaining, and resetting all stakes, marks, and lines
necessary for the Work based on job requirements set forth in subsequent sections.
C. The Contractor shall refer to the primary monuments shown on Sheet 1 (MON# 1, 2, 3) and set up
secondary control points as needed for measuring and stake setting.
D. The Contractor shall have Self-Leveling Laser Tripod properly set up on site during the construction for
checking and verifying elevations of excavation and fill grades/subgrades, and for rock wall
elevation/height control.
E. Stake setting or marking shall include but not be limited to the following:
a. Construction access and staging, stockpiling areas.
b. Crossing of seven cross sections, with marked excavation/fill grades.
c. Excavation limits and new rock wall alignments.
d. Beach nourishment grades and boundaries.
F. Stake setup shall be inspected and approved by the Engineer on site.
G. Confirmation of final finish beach grade and crest line elevation at project close-out.
3.4 Construction Access, Staging and Stockpiling Areas
The Contractor shall include construction access and staging/stockpiling plan as part of the Work Plan
submittal (see Section 3.2) to be approved by PM, Engineer and Landowners. The plan shall be in general
in line with TESC/SWPPP plan sheet and specifications in Section 3.5.
A. Consider using wood strand mulch (BMP C121, Section 2.7) to cover the construction access path.
Consider using fibric lining as needed. Install and maintain a minimum 3" of blanket mulch over at
least the soil ground of the access path. Recover the mulch and store it on site after the completion
of the project for landscaping use.
B. Mulching is not allowed inside the proposed beach excavation/fill area. The Contractor shall maintain
and contain the mulch to prevent it from being carried or dragged into the beach nourishment working
area. Steel plates may be used for beach access as needed.
C. Depending on weather and site soil conditions (wetness and clay content) at the time of construction,
the Contractor shall determine whether stabilized construction entrance/exit using quarry spalls (BMP
C105) is required. Mulching can be effective for construction entrance/exit if there is no high clay
content or muddy soil on the working site.
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KITSAP COUNTY DEPARTMENT OF COMMUNITY DEVELOPMENT DYES INLET ARMOR REMOVAL
D. Quarry spalls pads may not be required if delivery and haul trucks are only staying on the mulch covered
access path with no need of directly entering the excavation site.
E. If the quarry spall pad is not installed, it is the contractor's responsibility to install alternative measures
if required. The costs should be lumped into the Construction Access bid item above. Such measures
may include adding additional length of mulch cover for the construction access path or washing truck
tires as seen necessary at a designated tire washing station on the access path, with a pressure washer
machine.
F. Designated material loading/offloading areas, temporary stockpiling and equipment staging areas shall
be planned and properly prepared. A recommended and permit-approved arrangement of staging and
stockpiling areas for both north and south sites are attached as Sheet 1. Any significant changes to the
staging or stockpiling areas shall be included in Contractor's submitted work plan doe approval, which
may also require additional agency review and approval.
G. For stockpiling materials such as quarry spalls and beach nourishment materials, proper liners may be
required beneath the stockpiles to prevent the imported materials or the soil ground being mixed with
dissimilar materials.
H. Minimize stockpile area as practically possible.
3.5 Erosion Control and Water Pollution Prevention
A. The Contractor is responsible for planning, furnishing and installing/implementing erosion control and
water pollution prevention measures as required per Contract Plans and all permit requirements, or as
necessary, to prevent siltation or silt-laden waters, or contaminated chemicals from entering waters of
the State of Washington, and to ensure that effective pollution control /spill response measures are in
place in case of accidents or other emergency situations.
B. Specific Work may include, excluding any measures or requirements covered by Section 3.6:
a. Brief TESC and SPCC plans, including proposed BMPs, strategies to contain fluids if a hydraulic line is
broken (as part of the Work Plan submittal).
b. Use bio hydraulic fluid for equipment operating on the beach.
c. Comply with "Erosion Control and Pollution Prevention" notes on Construction Planning and
TESC/SWPPP" Sheet 1, unless preapproved by PM or Engineer.
d. Any necessary BPM implementations, excluding "Mulching" which is part of "Construction Access"
bid item.
e. Straw wattles, erosion control blanket as required in the event of heavy rain or large runoff.
C. General requirements include:
a. Construction timing is one of the key factors to minimize environmental impacts; all work shall occur
Comply with all federal and local level permit requirements associated with erosion control and
water pollution prevention.
3.6 Gazebo Relocation
A. This work consists of removing and reinstalling the existing Gazebo to a different approved location on
site. The contractor is responsible for the means and methods, either moving it as a whole or
disassembling and reinstalling it.
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