2572Protection and Restoration of Vegetation

2572.1DESCRIPTION

This Work consists of protecting and preserving vegetation from damage and restoring vegetation damaged by the Contractor’s operations.

2572.2MATERIALS

A Plant Materials ................................................................................................. 2571 and 2574.5C B Temporary Fence Provide temporary fence meeting the following characteristics and requirements:

Vegetation)

C Water Provide municipal potable water or harvested ground water for irrigation . E Tree Growth Retardant (TGR) Provide the TGR paclobutrazol or an equal approved by the Engineer.

2572.3CONSTRUCTION REQUIREMENTS

A Protecting and Preserving Protect and preserve the following:

endangered species list

of clearing and grubbing in accordance with 2101.3, “Clearing and Grubbing, Construction Requirements”

Do not place temporary Structures, store Material, or conduct unnecessary construction activities within 25.25 feet outside of the dripline of trees designated for preservation, unless otherwise approved by the Engineer. Do not place temporary Structures or store Material, including common borrow and topsoil, outside of the construction limits in areas designated for preservation, as required by the C ontract or as approved by the Engineer. Do not place or leave waste Material on the Project, including bituminous and concrete waste that would interfere with performing the requirements of 2106.3D, “Preparation of Embankment Foundation,” or 2574.5C, “Establishing Vegetation and Controlling Erosion.” The Department defines concrete waste as excess Material not used on the Project, including Material created from grinding rumble strips. Dispose of excess Material in accordance with 2104.3D, “Disposal of Materials and Debris.”

A.1 Temporary Fence Place temporary fences to protect vegetation before starting construction . Place temporary fence at the construction limits and at other locations adjacent to vegetation designated for preservation as required by the Contract or as approved by the Engineer. The Department will provide tree protection signs. Place tree protection signs in accordance with any of the following:

Do not remove the fence until all Work is completed or until approved by the Engineer. Ensure the fence prevents traffic movement and the placement of temporary facilities, Equipment, stockpiles, and supplies from harming the vegetation. A.2 Clean Root Cutting Cleanly cut tree roots at the construction limits as required by the C ontract or as directed by the Engineer. Immediately and cleanly cut damaged and exposed roots. Cut back damaged roots of trees designated for protection to sound healthy tissue and immediately place topsoil over the exposed roots. Immediately cover root ends exposed by excavation activities with 6 inches of topsoil as measured outward from the cut root ends. Immediately (within 5 minutes) treat cut oak roots with a wound dressing Material consisting of latex paint or shellac. Limit cutting to a minimum depth necessary for construction. Use a vibratory plow, or other approved root cutter in accordance with the Standard Detail Sheet for Protection and Restoration of Vegetation, before excavation. A.3 Watering Water root-damaged trees during the growing season that root damage occurs, and water Specified Trees if required by the Contract or directed by the Engineer. Maintain adequate but not excessive soil moisture by saturating the soil within the undisturbed portion of the dripline of impacted or identified trees to a depth of 20 inches. Use a soil recovery probe to check the soil moisture to a depth of 20 inches, and adjust the intervals and frequency of watering in accordance with prevailing moisture and weather conditions. A.4 Rooting Topsoil Borrow Place rooting topsoil borrow instead of common topsoil borrow within the dripline of Specimen Trees as required by the Contract or as directed by the Engineer. Place the topsoil to avoid over-compaction as approved by the Engineer. Establish turf consistent with the adjacent areas as approved by the Engineer. A.5 Utility Construction Bore under roots of trees designated for preservation for utility installations within the tree protection zone in accordance with the following:

Table 2572.3-1 Tree Protection Zone Tree diameter at 4.5 feet above ground, inch Minimum distance from face of tree trunk, feet Minimum depth of tunnel, feet <2 2 3 2–4 4 3 >4–9 6 3 >9–14 10 3 >14–19 12 3.25 >19 15 4

Do not perform open trenching within the tree protection zone. Bore under areas of native prairie and protected plant species as required by the Contract or as directed by the Engineer. A.6 Pruning Provide an arborist certified by the International Society of Arboriculture to prune trees as required by the Contract or as directed by the Engineer in accordance with 2571.3E.1, “Pruning – Top Growth and Roots.” Ensure the arborist removes dead, broken, rubbing branches, and limbs that may interfere with the existing and proposed Structures. A.7 Destroyed or Disfigured Vegetation Restore vegetation designated on the Plans for preservation that is damaged or disfigured by the Contractor’s operations at no additional cost to the Department . Restore the damaged vegetation to a condition equal to what existed before the damage. The Engineer may assess damages against the Contractor for damage to vegetation not restored to the previous condition. The Engineer will assess the value of damages to trees and landscaping at not less than the appraisal damages as specified in the Council of Tree and Landscape Appraisers Guide for Plant Appraisal. The Engineer will determine and assess damages of other vegetation. A.8 Oak Trees Avoid wounding of oak trees during April, May, June, and July to prevent the spread of oak wilt. If the Engineer determines that Work must take place near oak trees during those months, immediately (within 5 minutes) treat resulting wounds with a wound dressing Material consisting of latex paint or shellac. Blend paint colors with the bark color. Maintain a supply of approved wound dressing on the Project at all times during this period. A.9 Tree Growth Retardant (TGR) Provide an arborist certified by the International Society of Arboriculture to treat trees with the TGR as required by the Contract or as directed by the Engineer. Ensure the arborist applies the TGR paclobutrazol as a basal drench or soil injection and in accordance with the label directions. Provide the Engineer with the product label and Material Safety Data Sheet for the product used. A.10 Other Vegetation Protection Measures Provide other vegetation protection measures including root system bridging, compaction reduction, aeration, irrigation systems, J-barriers for Specimen Tree protection, and retaining walls as required by the Contract or as directed by the Engineer. B Quarantined Wood ....................................................................................................... 2101.3D.4

D Disposal of Material and Debris ....................................................................................... 2104.3D

2572.4METHOD OF MEASUREMENT

A Temporary Fence The Engineer will measure temporary fence placed, maintained, and removed by length along the bottom of the fence between end posts. B Clean Root Cutting The Engineer will measure clean root cutting by length along the plow line. The Engineer will determine the beginning and ending points for clean root cutting as the intersection of the construction limit and the dripline of the tree or Brush or in accordance with lines shown on the Plans. C Water The Engineer will measure water by volume used to protect and restore vegetation . The Engineer will not measure water otherwise used in performing the Work, such as for maintenance of sod. D Rooting Topsoil Borrow The Engineer will measure rooting topsoil borrow by loose volume as required by the Contract. E Pruning The Engineer will measure pruning by the hours of actual pruning W ork. F Tree Growth Retardant (TGR) The Engineer will measure TGR by volume of Material applied for the size of the tree treated. The Engineer will determine the volume of TGR required by the diameter at breast height (DBH) of each tree treated. DBH is defined as 4.5 feet above ground level. The Engineer will use a diameter tape measure to measure DBH.

2572.5BASIS OF PAYMENT

The Department will include the cost of the following with other relevant C ontract Items:

Material and debris

The Department will pay for protection and restoration of vegetation based on the following U nit Prices, in the absence of Contract Unit Prices: Table 2572.5-1 Protection and Restoration of Vegetation Items Item Unit Price Temporary fence $2.50 per foot Clean root cutting $3.50 per foot Water $3.00 per 100 gallon Prune trees $75.00 per hour Tree growth retardant $8.00 per diameter inch

The Department will pay for protection and restoration of vegetation on the basis of the following schedule: Item No. Item Unit

2572.503 Temporary Fence linear foot

3 Clean Root Cutting linear foot

6 Tree Growth Retardant gallon

6 Water gallon

2572.510 Prune Trees hour

The Department will pay for rooting topsoil borrow (3877, “Topsoil Material,”) on the basis of the schedule in 2574.5B, “Soil Preparation, Schedule.”