EIE326-01_19_10_00_29-2_2_AM_5_Pages.pdf

DORMITORY, 168 PN EIELSON AFB, AK W911KB-14-R-0017

SECTION 01 19 10.00 29 EIE 326

2.2.11 Landscape

A. Provide a landscape design that promotes the residential feel of the campus and the well being of the residents. The design shall visually enhance the facility and screen visually unappealing elements with native plants. The goal is to instill pride in the campus and create a year round outdoor environment for recreation and leisure. Areas disturbed by construction will be landscaped or seeded. Plant groupings shall consider personnel security, micro climates, wildlife habitat and ease of maintenance. The planting design shall consider traffic sight distances, underground and above ground utilities, snow maintenance and security. Planting or seeding shall occur only during periods when beneficial results can be obtained.

B. Preservation of Existing Trees

1. Trees to be saved shall be protected by temporary fencing continuously during demolition and construction operations.

2. Trees and other vegetation to be retained shall be protected from erosion and sedimentation.

3. Existing remaining trees shall be maintained in healthy condition by the Contractor during demolition and construction operations.

4. Work to be performed within the tree protection area shall be done by hand or light equipment. The grade shall not be elevated nor reduced within the critical root zone.

5. Weeds, invasive and obnoxious plants shall be removed and replaced with native species.

AM#5…

6. Restoration of trees removed for construction: Contractor is allowed to remove existing trees within the project boundaries if they are directly impacted by new construction (foundation work, sidewalks, paving, utility trenching, etc) and not simply to reduce efforts required to maintain existing landscaping during construction. Where existing trees are removed, replacement trees shall be included in the construction contractor’s landscape bid under Option #4. The quantity of trees to be added shall meet the following requirements.

a. Trees: The contractor shall develop specifications for plant digging, handling and storage. Transplanting existing trees with a trunk diameter of one inch as measured 36 inches above the ground surface shall not be attempted. Trees and shrubs shall be replaced with the same species unless otherwise authorized by the Contracting Officer. Additional replacement trees are required to replace the value of a large diameter tree. Trees with a trunk diameter greater than two inch shall be replaced with 2 trees. Trees with a trunk diameter greater than three inches shall be replaced with 3 trees. Trees with a trunk diameter greater than four inches shall be replaced with 4 trees. To determine a tree's trunk diameter measure the trunk 36 inches above the ground surface. Round up when the trunk is an odd inch, e.g., a trunk diameter of 2.75 inches would round to 3 inches and be replaced with three (3) trees. Transplanted plant material shall be guaranteed to be in vigorous growing condition for a period of 12 months. A plant shall be replaced one time under this guarantee. Location of replacement trees shall be coordinated with the

354 CES/CEIEA 377-5182. …AM#5

C. Landscape Materials

1. Trees, shrubs, and Ground Cover

a. Tree and shrub plant material shall be locally grown, within 125 miles of Fairbanks, or from local seed stock. Plant material from the same latitude is acceptable if local material is not available. Stock from Delta Junction and Nenana are acceptable.

Any deviations must be approved by Natural/Cultural Resources in writing. All nursery stock shall be healthy and free from disease, insect pests, mold, and fungus.

b. Plants shall be grown under climatic conditions similar to the locality of the project.

c. Quality, well shaped, vigorous, healthy plants having healthy and well branched root systems shall be provided.

d. Plants shall be free from disease, harmful insects and insect eggs, sun-scald injury, disfigurement, and abrasion.

e. Plants shall be provided that are typical for the species or variety.

i. Recommended Tree Species

a) White spruce Picea glauca

b) Paper birch Betula papyrifera

c) Lodgepole pine Pinus contorta var. latifolia

d) Scotch pine Pinus sylvestris

ii. Recommended Shrub Species

a) Late lilac Syringa villosa

b) False spirea Sorbaria sorbifolia AM#4…

c) Deleted …AM#4

d) Potentilla Potentilla fruticosa

e) Common juniper Juniperus communis

f) Creeping juniper Juniperus horizontalis

g) Siberian pea shrub Caragana arborescens (for hedges)

2. Shade and Flowering Trees

a. A height relationship to caliper shall be provided that is in accordance with ANSI.

b. Height of branching should bear a relationship to the size and variety of tree specified, and with the crown in good balance with the trunk.

c. Trees shall not be “poled” or the leader removed.

3. Single Stem – Trunk shall be reasonably straight and symmetrical with crown and have a persistent main leader.

4. Multi-Stem – All countable stems, in aggregate, shall average the size specified. To be considered a stem, there should be no division of the trunk which branches more than 2 inches from the ground level.

5. Specimen – A plant shall be provided that is well branched and pruned naturally according to the species.

6. Deciduous Shrub

a. Plants that have the height and number of primary stems shall be provided and in accordance with ANSI.

b. An acceptable plant shall be well shaped with sufficient well spaced side branches recognized by the trade as typical for the variety grown in the region.

7. Coniferous Evergreen

a. Trees shall be provided that have the height-to-spread ratios which are in accordance with ANSI.

b. Trees shall not be “poled’ or the leader removed.

c. An acceptable plant shall be exceptionally heavy well shaped and trimmed to form a symmetrical and tightly knit plant.

8. Ground Cover

a. Plants shall be provided with the minimum number of runners and length of runner which are in accordance with ANSI.

b. Plants shall be furnished that have heavy, well developed and balanced top with vigorous well developed root system, and shall be furnished in containers.

9. Aggregate Mulch

a. Provide a minimum of 3’ wide aggregate mulch strip directly adjacent to the building.

b. Provide a 1’ wide aggregate mulch strip around AT/FP boulders.

c. Separate all aggregate mulch area from lawn areas with edging

10. Topsoil

a. Topsoil for trees, shrubs, ground covers and turf shall be either conserved topsoil screened to remove rocks, sticks, roots or debris larger than 0.75 inch and amended per the soil test, or manufactured topsoil consisting of 40%-60% shredded peat from a source above the water table, and 40%-60% sandy silt, or a mixture of conserved and manufactured topsoil amended per the soil test. Thoroughly mix lime into the topsoil to raise the soil pH to 7.0.

b. A soil test shall be performed for pH, chemical analysis, and mechanical analysis to establish the quantities and type of soil amendments required to meet local growing conditions for the type and variety of plant material specified.

11. Fertilizer for Trees and Shrubs

a. Apply 8-32-16 or 10-20-20 fertilizer before July 15th, or in the spring no later than May 15th, at a rate of 1 pound per 0.75 inch of trunk diameter applied to the drip zone area, staying away from the trunk.

b. Lightly rake the fertilizer into the soil.

c. For a slow release fertilizer, use MagAmp 7-40-6 plus 12% Magnesium.

D. Measurement: Plant measurement shall be in accordance with ANSI.

E. Installation

1. Verify the location of underground utilities

2. When obstructions below ground or poor drainage affect the planting operation, proposed adjustments to plant location, type of plant, and planting method or drainage correction shall be submitted.

3. Trees, shrub and ground cover planting season: 15 May to 15 Sept/freeze up.

4. Seeding planting Season: 15 May to 1 August and winter dormant seeding, planting just before the ground freezes in the fall.

5. Fertilizer applied to grass planted after 1 August should contain little or no nitrogen and a light application of phosphorus and potassium. Seeding at other than the specified date, will only be allowed upon written permission of the Architect/Engineer with a written guarantee by the contractor. Seeding shall not be done during windy conditions or when climatic or ground conditions would hinder placement or proper growth.

6. Plant pits shall be excavated and backfilled in accordance with ANSI.

7. The planting operation shall be performed only during periods when beneficial results can be obtained.

8. When special conditions warrant a variance to the planting operation, proposed planting times shall be submitted.

F. Pruning

1. The total amount of foliage shall be pruned by one-fourth to one third on installed trees and shrubs to compensate for loss of roots and transplanting shock.

2. The typical growth habit of individual plants shall be retained.

3. Trees shall not be “poled” or the leader removed, nor shall the leader be pruned or “topped off.”

G. Maintenance during planting operation

1. Installed plants shall be maintained in a healthy growing condition.

2. Maintenance operations shall begin immediately after each plant is installed and shall continue until the plant establishment period commences.

H. Plant establishment period

1. On completion of the last day of the planting operation, the plant establishment period for maintaining installed plants in a healthy growing condition shall commence and continue for a minimum of twelve months.

2. When the planting operation extends over more than one season or there is a variance to the planting times, the plant establishment periods shall be established for the work completed.

I. Maintenance during establishment period

1. The maintenance of plants shall include straightening plants, tightening stakes and guying material, supplementing mulch, accomplishing wound dressing, removing dead or broken tip growth by pruning, maintaining edging of beds, checking for girdling of plants and maintaining plant labels, watering, weeding, removing and replacing unhealthy plants.

2. Unhealthy Plant

a. A plant shall be considered unhealthy or dead when the main leader has died back, or 25 percent of the crown is dead.

b. Contractor shall determine the cause for an unhealthy plant.

c. Unhealthy or dead plants shall be removed immediately and shall be replaced as soon as seasonal conditions permit in accordance with the following warranty paragraph.

J. Warranty shall be for one full growing season after contract completion.

K. Turf

1. Turf consists of seed. There shall be two different types of turf mixtures applied; one for lawn areas around the dormitory and one for erosion control and field turf. The boundaries of each area shall be clearly defined on the planting plan. All areas disturbed by construction shall be turfed. Where necessary, erosion control methods shall be used to control wind or water related erosion. Work shall consist of placing 10cm (4 inches) of topsoil on all disturbed areas and seeding with the following seed mix:

a. Turf seed mix for around dormitory and field turf: 3.5 – 4.0lbs per 1,000 s.f.:

i. Festuca rubra ‘Arctared’ Red Fescue 50% by weight

ii. Poa protensis ‘Park’ or ‘Nugget’ Bluegrass 50% by weight

b. Turf seed mix for erosion control: 2.5lbs per 1,000 s.f.

i. Festuca rubra ‘Arctared’ Red Fescue 50% by weight

ii. Deschampsia beringensis: ‘Norcoast’ bering hairgrass 30% by weight

iii. Lolium sp. Perennial Ryegrass 20% by weight

2. Fertilizer

c. 20-20-10 fertilizer shall be applied at a rate to 7.5 lbs per 1,000 s.f., provide 2 pounds of actual nitrogen per 1,000 square feet of area and mixed into the top 4 inches of topsoil.

d. In the absence of a soil test and with directions from the project manager, the Contractor shall apply 17-17-17 at a rate of 12.5 pounds per 95 square meters.

2.2.12 Options

A. Refer to Paragraph 2.9. All Options shall comply with criteria of paragraph 2.1 through paragraph 2.8.

B. Option 4: Enhanced Landscaping - Landscape Planting Plan

1. A complete, integrated landscape planting plan shall be provided for the project. The design shall reflect appropriate groupings, and street tree plantings to define the outdoor spaces. Plant materials shall be chosen on the basis of plant hardiness, micro climate, soil conditions, maintenance requirements, and quality. Selected plant materials shall be low maintenance and tolerant of the specific site conditions. Planting or seeding shall occur only during periods when beneficial results can be obtained. The total quantity of trees and shrubs for the project shall be the sum of all plant material included in the scope of landscape planting plan. The scope of landscape planting plan shall be as follows:

a. Provide street tree plantings adjacent along Wabash Ave and Kobuk Loop planting a minimum of 12 trees. Trees shall be a minimum 2 inch caliper in size and 12 feet high, planted a minimum 25 feet on center and blend seamlessly with existing street tree plantings and AT/FP boulders. Tree planting shall be in a prepared, 18 inch deep, landscape bed with a minimum 4 inch organic mulch.

b. All areas not devoted to street tree plantings and parking lot landscaping shall be landscaped as follows:

iv. Provide a mixture of evergreen and deciduous tree plantings by planting a minimum of 30 trees. Trees shall be spaced in groupings and in a linear configuration, which compliments and blends seamlessly with the existing trees on campus. Trees shall be planted a maximum distance of 25 feet on center.

Deciduous trees shall be minimum 2 inch caliper in size. The number of evergreen trees shall be at least a third of the total number of trees on the project using at least two different species. The size of the evergreen trees shall be a minimum of 6 feet at the time of installation.

v. Provide a mixture of evergreen and deciduous shrub plantings by providing a minimum of 90 shrubs. The mixture and spacing of shrub planting material shall consider seasonal color and texture in addition to the mature height and spread.

Shrubs shall be spaced appropriately to avoid overcrowding at mature growth.

Shrubs shall be placed in groupings to compliment trees in the same planting area. The number of evergreen shrubs shall be at least one fifth of the total number of shrubs on the project. There shall be at least six different shrub species represented on the project with no species having less than one tenth of the overall number.

2.2.13 Prohibited Items

A. Sphagnum Moss.