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HomeMy WebLinkAboutP_SPU BCF Shoreline Mitigation Plans & Specs_210812_v1.pdf90% (NOT FOR CONSTRUCTION) CS301 ASSOCIATES JACOBS McMILLEN 90% (NOT FOR CONSTRUCTION) CS302 ASSOCIATES JACOBS McMILLEN 90% (NOT FOR CONSTRUCTION) CS303 ASSOCIATES JACOBS McMILLEN HABITAT LOG STRUCTURES SECTION 31 40 00 BROODSTOCK COLLECTION FACILITY Page 1 PART 1 -- GENERAL 1.01 SECTION INCLUDES: A. This section includes all labor, equipment, and materials required to install three (3) habitat log structures in accordance with the Contract Documents. 1.02 RELATED SECTIONS: 1. 01 33 10 – Submittals 2. 31 00 00 - Earthwork 3. 31 11 00 – Site Preparation 4. 31 35 00 – Erosion and Sediment Control, General 5. 31 23 19 - Dewatering 1.03 SUBMITTALS A. Furnish submittals in accordance with the requirements of Section 01 33 00 – Submittals. B. Submittal shall include source site information, age of material, tree species, trunk diameter at breast height, and rootwad diameter. C. Materials shall meet the requirements of the Specifications, herein. Submit at least 28 days prior to installation of the habitat log structures. 1.04 SUMMARY A. Work includes furnishing all labor, materials and equipment required for the installation of three (3) habitat log structures on the left bank of Cedar River as shown on the drawings and as specified herein. PART 2 -- PRODUCTS 2.01 ROOTWAD LOGS A. Rootwad logs shall consist of tree trunks with intact rootwads and shall meet the following requirements: 1. Tree Species: Douglas Fir 2. Length (including rootwad): 32 feet 3. Trunk Diameter (at Breast Height): 30 inches 4. Trunk Taper: One (1) inch diameter per 10 feet length (maximum) HABITAT LOG STRUCTURES SECTION 31 40 00 BROODSTOCK COLLECTION FACILITY Page 2 5. Rootwad Diameter: 5 foot (or as approved by ENGINEER) 6. Rootwad logs shall be from sound stock and appropriate for the intended use. The trunk of the logs shall be reasonably straight and uniform, free of excessive bends, and branches or limbs. Logs exhibiting breakage, rot, splitting, holes, pest infestation, foreign objects/finishes, vandalism, burn, and other damages are not allowed and may be rejected by the OWNER. 7. Limbs shall be trimmed within one inch of the face of the log. Limbs do not include the root mass. 8. Rootwad masses shall be reasonably uniform and full; rootwad logs with asymmetrical rootwad masses may be rejected by the OWNER. 9. If the habitat logs cannot be obtained as specified, the CONTRACTOR shall notify the ENGINEER and submit an alternative habitat log for approval. PART 3 -- EXECUTION 3.01 SITE PREPARATION A. The CONTRACTOR is responsible for surveying and staking the location of the habitat logs in accordance with the Contract Documents. Final location and alignment of the habitat logs shall be approved by the OWNER prior to installation. B. Implement erosion and sediment control measures and dewatering measures, as necessary, to remain in compliance with construction permit conditions and requirements. Measures may include: surface water diversion and/or dewatering for excavation. Refer to Section 31 23 19 – Dewatering. C. Clear, grub, and strip the structure footprint as necessary. Vegetation removal shall be minimized to the extent practical; removal of trees larger than 3-inches in diameter at breast height shall require approval from the OWNER. Refer to Section 31 11 00 – Site Preparation for requirements. 3.02 EXCAVATION A. The CONTRACTOR shall perform the excavation as required for installation of each habitat log as specified in the Contract Documents. Native materials shall be stockpiled and used for backfill of the habitat logs. All excavations shall be performed to OSHA safety standards. Stockpiled material shall be stored in accordance with Section 31 35 00 – Erosion and Sediment Control, General. 3.03 INSTALLATION OF HABITAT LOGS A. The CONTRACTOR shall dewater the excavation, as necessary, to place the habitat log and backfill material in the dry. B. Place habitat logs at the location, slope, and elevations shown in the Contract Documents. HABITAT LOG STRUCTURES SECTION 31 40 00 BROODSTOCK COLLECTION FACILITY Page 3 C. Install two 24-inch habitat boulders at base of crown to support log and prevent undercutting of the log from potential scour action during high flow events. See streambed boulder specification in Section - 31 00 00. D. Native material shall be used for backfill of the habitat logs. Backfill and compaction shall occur in 6-inch lifts. Backfill and compaction adjacent to the log shall occur in equal lifts to prevent movement of the log during compaction. E. The ballast boulder(s) shall be placed over the top of the log at the midway point of the trunk. The ballast boulder shall be installed once the backfill is level with the top of the trunk. F. Backfill and compaction above the crown of the log shall be completed in 1-foot lifts. G. Remaining excavated native materials shall be spread evenly over the disturbed area such that no mounds or piles remain. End of Section 31 40 00 PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 1 PART 1 -- GENERAL 1.01 DESCRIPTION OF WORK A. The CONTRACTOR shall provide all materials and equipment required for completion of the enhancement plantings in accordance with the Contract Documents. 1.02 RELATED SECTIONS: 1. 01 33 10 - Submittals 1.03 REFERENCE STANDARDS A. American National Standards Institute (ANSI) 1. Z60.1 American Standard for Nursery Stock 1.04 SUBMITTALS A. Furnish submittals in accordance with the requirements of Section 01 33 00 – Submittals. B. Product Data: For each type of product 1. Plant Materials: Include quantities, sizes, quality, and sources for plant materials. 2. Jute Net: material description an specifications C. Samples for Verification: For each of the following 1. Organic Mulch: 1-quart volume of each organic mulch required; in sealed plastic bags labeled with composition of materials by percentage of weight and source of mulch. Each Sample shall be typical of the lot of material to be furnished; provide an accurate representation of color, texture, and organic makeup. D. Informational Submittals 1. Qualification Data: For landscape Installer. Include list of similar projects completed by Installer demonstrating Installer's capabilities and experience. Include project names, addresses, and year completed, and include names and addresses of owners' contact persons. 2. Product Certificates: For each type of manufactured product, from manufacturer, and complying with the following: a. Manufacturer's certified analysis of standard products. b. Analysis of other materials by a recognized laboratory made according to methods established by the Association of Official Analytical Chemists, where applicable. PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 2 E. Closeout Submittals 1. Maintenance Data: Recommended procedures to be established by Owner for maintenance of plants during a calendar year. Submit before expiration of required maintenance periods. 1.05 SUMMARY A. Work includes furnishing all labor, materials and equipment required for the installation of the enhancement plantings. PART 2 -- PRODUCTS 2.01 RIPARIAN PLANTINGS A. Riparian plants shall include the following species: 1. Pacific Ninebark (Physocarpus Capitatus) 2. Red-Osier Dogwood (Cornus Sericea) 3. Salmonberry (Rubus Spectablis) 4. Sitka Willow (Salix Sitchensis) B. PLANT MATERIAL 1. General: Furnish nursery-grown plants true to genus, species, variety, cultivar, stem form, shearing, and other features indicated in Plant List, Plant Schedule, or Plant Legend indicated on Drawings and complying with ANSI Z60.1; and with healthy root systems developed by transplanting or root pruning. Provide well- shaped, fully branched, healthy, vigorous stock, densely foliated when in leaf and free of disease, pests, eggs, larvae, and defects such as knots, sun scald, injuries, abrasions, and disfigurement. a. Trees with damaged, crooked, or multiple leaders; tight vertical branches where bark is squeezed between two branches or between branch and trunk ("included bark"); crossing trunks; cut-off limbs more than 3/4 inch in diameter; or with stem girdling roots are unacceptable. b. Collected Stock: Do not use plants harvested from the wild, from native stands, from an established landscape planting, or not grown in a nursery unless otherwise indicated. 2. Provide plants of sizes, grades, and ball or container sizes complying with ANSI Z60.1 for types and form of plants required. Plants of a larger size may be used if acceptable to Architect, with a proportionate increase in size of roots or balls. 3. Root-Ball Depth: Furnish trees and shrubs with root balls measured from top of root flare according to ANSI Z60.1. Root flare shall be visible before planting. PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 3 4. Labeling: Label at least one plant of each variety, size, and caliper with a securely attached, waterproof tag bearing legible designation of common name and full scientific name, including genus and species. Include nomenclature for hybrid, variety, or cultivar, if applicable for the plant. 5. If formal arrangements or consecutive order of plants is indicated on Drawings, select stock for uniform height and spread, and number the labels to assure symmetry in planting. 2.02 JUTE NET A. Meet the requirements of Washington Department of Ecology BMP C122. B. Jute matting shall be of a uniform open plain weave of unbleached, single jute yarn treated with a fire-retardant chemical. The yarn shall be of a loosely twisted construction and shall not vary in thickness by more than 1/2 of its nominal diameter. Jute matting shall be furnished in rolled strips approximately 50 yards in length. Matting width shall be 48 inches with an average weight of 0.92 pound per square yard. A tolerance of *1 inch in roll width and *5 percent in weight per square yard will be allowed. 2.03 MULCH A. Straw mulch shall meet the requirements of COS Standard Specifications Section 9- 14.4(1) – Straw. All straw mulch material shall be in an air-dried condition free of noxious weeds and other materials detrimental to plant life. Straw shall be seasoned before baling or loading and shall be suitable for spreading with mulch blower equipment. B. Coarse compost that meets the following size gradations when tested in accordance with the U.S. Composting Council “Test Methods for the Examination of Compost and Composting” (TMECC) Test Method 02.02-B. Coarse Compost Gradation Minimum Percent passing 3” sieve openings 100% Minimum Percent passing 1” sieve openings 90% Minimum Percent passing ¾” sieve openings 70% Minimum Percent passing ¼” sieve openings 40% PART 3 -- EXECUTION 3.01 EXAMINATION A. Examine areas to receive plants, with Installer present, for compliance with requirements and conditions affecting installation and performance of the Work. 1. Verify that no foreign or deleterious material or liquid such as paint, paint washout, concrete slurry, concrete layers or chunks, cement, plaster, oils, PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 4 gasoline, diesel fuel, paint thinner, turpentine, tar, roofing compound, or acid has been deposited in soil within a planting area. 2. Suspend planting operations during periods of excessive soil moisture until the moisture content reaches acceptable levels to attain the required results. 3. Uniformly moisten excessively dry soil that is not workable or which is dusty.. 4. Proceed with installation only after unsatisfactory conditions have been corrected. 3.02 PREPARATION A. Protect structures, utilities, sidewalks, pavements, and other facilities and turf areas and existing plants from damage caused by planting operations. B. Install erosion-control measures to prevent erosion or displacement of soils and discharge of soil-bearing water runoff or airborne dust to adjacent properties and water bodies. C. Lay out plants at locations directed by COR. Stake locations of individual trees and shrubs and outline areas for multiple plantings. 3.03 PLANTING AREA ESTABLISHMENT A. General: Prepare planting area for soil placement and mix planting soil. B. Placing Planting Soil: Place manufactured planting soil over exposed subgrade. Mix planting soil into upper level of the subgrade to prevent solid interface of soil textures which will impede drainage. 3.04 EXCAVATION FOR TREES AND SHRUBS A. Planting Pits and Trenches: Excavate circular planting pits. 1. Excavate planting pits with sides sloping inward at a 45-degree angle. Excavations with vertical sides are unacceptable. Trim perimeter of bottom leaving center area of bottom raised slightly to support root ball and assist in drainage away from center. Do not further disturb base. Ensure that root ball will sit on undisturbed base soil to prevent settling. Thoroughly scarify sides of planting pit to prevent roots from circling the planting pit. 2. Excavate approximately three times as wide as ball diameter for balled and burlapped, balled and potted, and container-grown stock. 3. Do not excavate deeper than depth of the root ball, measured from the root flare to the bottom of the root ball. 4. If area under the plant was initially dug too deep, add soil to raise it to the correct level and thoroughly tamp the added soil to prevent settling. PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 5 5. Maintain angles of repose of adjacent materials to ensure stability. Do not excavate subgrades of adjacent paving, structures, hardscapes, or other new or existing improvements. 3.05 TREE AND SHRUB PLANTING A. Inspection: At time of planting, verify that root flare is visible at top of root ball according to ANSI Z60.1. If root flare is not visible, remove soil in a level manner from the root ball to where the top-most root emerges from the trunk. After soil removal to expose the root flare, verify that root ball still meets size requirements. B. Roots: Remove stem girdling roots and kinked roots. Remove injured roots by cutting cleanly; do not break. C. Balled and Burlapped Stock: Set each plant plumb and in center of planting pit or trench with exposed root flare 1 to 2 inches above adjacent finish grades. 1. Backfill: Planting soil. For trees, use planting soil for backfill. 2. After placing some backfill around root ball to stabilize plant, carefully cut and remove burlap, rope, and wire baskets from tops of root balls and from sides, but do not remove from under root balls. 3. Backfill around root ball. When planting pit is approximately one-half filled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed. Add more soil as necessary to maintain proper soil level. A soil berm may be built at the edge of the rootball to hold water where it will be most beneficial. 4. Place planting tablets equally distributed around each planting pit when pit is approximately one-half filled. Place tablets beside the root ball about 1 inch from root tips; do not place tablets in bottom of the hole. Install 3 planting tablets for each caliper inch of plant. 5. Continue backfilling process. Water again after placing and tamping final layer of soil. D. Balled and Potted and Container-Grown Stock: Set each plant plumb and in center of planting pit or trench with exposed root flare 1 to 2 inches above adjacent finish grades. 1. Backfill: Planting soil. For trees, use planting soil for backfill. 2. Carefully remove root ball from container without damaging root ball or plant. 3. Backfill around root ball. When planting pit is approximately one-half filled, water thoroughly before placing remainder of backfill. Repeat watering until no more water is absorbed. Add more soil as necessary to maintain proper soil level. A soil berm may be built at the edge of the rootball to hold water where it will be most beneficial. PLANTS SECTION 32 93 00 BROODSTOCK COLLECTION FACILITY Page 6 4. Place planting tablets equally distributed around each planting pit when pit is approximately one-half filled. Place tablets beside the root ball about 1 inch from root tips; do not place tablets in bottom of the hole. Install three (3) tablets per caliper inch of plant. 5. Continue backfilling process. Water again after placing and tamping final layer of soil. 3.06 JUTE NET INSTALLATION A. Jute net shall be installed upon completion of finished grading. B. Secure jute net using trench anchors and habitat boulders as indicated in the Contract Documents. 3.07 PLANT AREA MULCHING A. Mulch backfilled surfaces of planting areas and other areas indicated. 1. Organic Mulch in Planting Areas: Apply 3-inch average thickness of organic mulch over whole surface of planting area, and finish level with adjacent finish grades. Do not place mulch within 3 inches of trunks or stems. End of Section 31 35 30