Teragan Division Transit Project Report

MEMORANDUM

DATE: July 31, 2019

TO: Marianne Zarkin (MZLA)

FROM: Todd Prager, RCA #597, ISA Board Certified Master Arborist

RE: Updated Tree Plan for the Division Transit Project, Gresham

Summary This report provides updated recommendations for meeting the applicable tree preservation, removal, mitigation, and protection requirements in Section 9.1000 (Tree Regulations) of the Gresham Code for the Division Transit Project.

Background The Division Transit Project is a transportation infrastructure improvement project that extends from SE 11th Avenue and Division Street in Portland to the Cleveland Avenue MAX Station in Gresham. While I assessed 398 total trees within the project corridor, 229 of the trees are within the City of Portland and 169 are within the City of Gresham.

The purpose of this report is to provide updated recommendations for meeting the applicable tree preservation, removal, mitigation, and protection requirements in Section 9.1000 (Tree Regulations) of the Gresham Code based on revisions to the project since my January 8, 2019 report.

Tree Assessment In October and December, 2018, I assessed the trees along the Division Transit Project corridor. I also completed additional assessments until June 2019 to review revisions to the project. The project consists of transportation infrastructure improvements and extends from SE 11th Avenue and Division Street in Portland to the Cleveland Avenue MAX Station in Gresham. I assessed 398 trees along the project corridor. Of the 398 trees, 229 are within the City of Portland and 169 are within the City of Gresham. This report addresses the 169 trees within the City of Gresham portion of the project. A separate report is provided for the trees in the City of Portland.

Teragan & Associates, Inc. 3145 Westview Circle  Lake Oswego, OR 97034 Phone: 971.295.4835  Fax: 503.697.1976 Email: [email protected]  Website: teragan.com Tree Plan for Division Transit Project, Gresham July 31, 2019 Marianne Zarkin, MZLA Page 2 of 26

Attachment 1 is the complete inventory data for the 169 City of Gresham trees and includes the species (common and scientific names), DBH, health condition, structural condition, whether the tree is a nuisance species, pertinent comments, treatment (remove or retain), whether arborist oversight is required during construction, mitigation required, whether the trees are on private property, and tree type (regulated tree, street tree, landscape tree, parking lot tree, etc.). The tree numbers in the inventory in Attachment 1 correspond to the tree numbers shown on the site plans by MZLA in Attachment 2.

Tree Preservation, Removal, and Mitigation Of the 169 trees along the project corridor, 133 will be retained and 36 will be removed. Of the 36 removed trees, 32 are "protected" trees according to Section 9.1012 (Required, Regulated and Significant Tree Types) of the Gresham Code. The remaining 4 trees are not protected because they are either a dead stump (tree 101) or less than 8-inch DBH on private property and not landscape or parking lot trees (trees 144, 147, and 148). Note that shrub species (e.g. photinia) are not regulated as trees. The individual trees to be removed are listed in the tree inventory in Attachment 1. Table 1 is a summary of the proposed protected tree removals:

Table 1: Summary of Proposed Protected Tree Removals Tree Type # to be Removed # to be Mitigated Comments Part of an approved Landscape Trees 1 1 landscape plan on private property In Cleveland MAX Parking Lot Trees 13 13 Station parking lot Street Trees 12 12 In public ROW No more than 3 trees Regulated Trees 6 6 per property Total 32 32

As shown in Table 1, 32 protected trees are proposed for removal. The proposed removals include 1 landscape tree, 13 parking lot trees, 12 street trees, and 6 regulated trees (over 8-inch DBH) on private property. All of the trees proposed for removal are less than 24-inch DBH. Note that tree 160 is now included in the list of trees to be retained and protected.

Note that no more than 3 regulated trees will be removed per property. Therefore, these removals are exempt according to Sections 9.1021 and 9.1031 of the Gresham Code.

Since all 32 trees are less than 24-inch DBH, they will be replaced with 32 trees in accordance with Sections 9.1025 and 9.1035 of the Gresham Code.

The landscape plan by MZLA includes the mitigation tree sizes, species, and locations.

Tree Protection During Development (9.1022 and 9.1032) The standard tree protection zone in the City of Gresham Code encompasses a radius around a tree that is equivalent to one foot per inch of DBH. For example, a tree with a 24-inch DBH would have a 24-foot tree protection zone radius. However, the City of Gresham allows an alternative tree protection zone if it is developed by a certified arborist.

A typical alternative minimum tree protection zone utilized by our firm encompasses a radius around a tree of .5 feet per inch of DBH. For example, a tree with a 24-inch DBH would have a 12-foot minimum tree protection zone radius. It is a typical minimum setback used in the arboriculture industry as long as overall root zone impacts are limited.1 Note that this minimum setback is permitted by the City of Portland code and will be used for the portion of this project in the Portland city limits.

Since this project is along a transportation corridor and most of the trees are adjacent to streets, curbs, and sidewalks, meeting the City of Gresham standard tree protection zone radius of one foot per inch of DBH is not practicable. Therefore, the alternative minimum tree protection zone radius of .5 feet per inch of DBH will be used to protect the trees in the Gresham portion of this project. The following tree protection measures will be required to adequately protect the trees to be retained:

 Tree Protection Fencing: Tree protection fencing shall be installed in the locations shown in Attachment 2 for the trees that are adjacent to proposed construction. For future drawings, include the total tree protection zones2 and critical root zones3 of the retained trees so we can evaluate locations where additional protection fencing may be needed.  Demolition: Any demolition of pavement or other improvements within the critical root zones shall occur under project arborist supervision. Heavy equipment shall be positioned outside the critical root zones and care shall be taken not to disturb the existing soil surface within the critical root zones during demolition activities. This will be particularly important for trees 6 through 48 at the Cleveland MAX Station.  Excavation: Excavation within the critical root zones of trees to be retained shall occur under project arborist supervision as follows: o Carefully excavate adjacent to the trees by pulling shallow layers of soil away from the trees with the project arborist probing the soil in between layer removal to identify roots greater than 2-inches in diameter. If roots greater than 2-inches in diameter are encountered

1 Costello, L.R., and K.S. Jones. 2003. Reducing Infrastructure Damage by Tree Roots: A Compendium of Strategies. Cohasset, CA: Western Chapter of the International Society of Arboriculture. 2 Total tree protection zone per the City of Gresham is defined as a radius around a tree to be retained of 1 foot per inch of DBH. 3 Critical root zone is defined by our firm as a radius around a tree to be retained of .5 feet per inch of DBH.

during excavation, they shall be hand excavated and retained in placed until the full extent of structural roots can be determined. o If the project arborist determines that certain roots are not critical to tree health and/or stability, they may be approved for removal with sharp pruning equipment. o If the roots are critical to tree health and/or stability, the improvements may need to be modified to retain the critical roots if possible and approved by the project team. o If modifying the improvements is not feasible, additional trees may need to be removed.  Repaving: When repaving occurs within the tree protection zones where existing pavement was removed, reuse or carefully replace the existing base rock materials under project arborist supervision without excavating below the existing native soil grade. This will be particularly important for trees 6 through 48 at the Cleveland MAX Station.  Stump Removal: The stumps of trees to be removed from within the critical root zones of retained trees will need to be carefully ground out or have their structural roots cut before pulling with an excavator to protect the root systems of the trees to be retained.  Protect Tree Crowns: Care will need to be taken to not contact or otherwise damage the crowns or branches of retained trees that extend outside of the tree protection zones.  Crown Pruning: Clearance pruning may be required for the trees directly adjacent to construction. All pruning shall be completed by a qualified tree service with an ISA Certified Arborist on site. All pruning shall be in accordance with ANSI A300 pruning standards and Z133.1 safety standards. No more than 20 percent of the live foliage of a tree should be removed in any one growing season and the live crown shall comprise at least the top 50 percent of the total tree height after clearance pruning is complete. The pruning shall be the minimum needed to achieve the required clearance.  Arborist Oversight: Based on the locations of the proposed demolition and construction in Attachment 2, onsite supervision of the project arborist will be required for trees 6 through 48, 93, 93.5, 95 through 99, 140 through 143, 160, 163, and 164.

Attachment 3 includes additional recommendations to adequately protect the trees during construction.

Conclusion The recommendations in this report meet the requirements in Section 9.1000 of the Gresham Code for the Division Transit Project.

Please contact me if you have questions, concerns, or need any additional information.

Sincerely,

Todd Prager ASCA Registered Consulting Arborist #597 ISA Board Certified Master Arborist, WE-6723B ISA Qualified Tree Risk Assessor AICP, American Planning Association

Attachment 1: Tree Inventory Attachment 2: Site Plan with Trees and Tree Protection Attachment 3: Additional Tree Protection Recommendations Attachment 4: Assumptions and Limiting Conditions

Attachment 1

Arborist PRIV- Teragan Nuisance/ Oversight Pot. KEEP=0 Common Name Scientific Name DBH Condition Structure Comments City DEMO=1 ; PP Mit. Total Mit. Tree No. Invasive during Mit. REMOVE=1 PRIV-KEEP=0 Construction? GRESHAM: 1-165 1 flowering cherry Prunus serrulata 4 good good Gresham 1 0 0 2 flowering cherry Prunus serrulata 3 good good Gresham 1 0 0 multiple leaders, topped 3 red maple Acer rubrum 12 fair fair Gresham 1 0 0 for overhead utilities

multiple leaders, topped 4 red maple Acer rubrum 10 fair fair Gresham 1 0 0 for overhead utilities 5 red maple Acer rubrum 10 good fair multiple leaders Gresham 1 0 0 topped for overhead 6 incense cedar Calocedrus decurrens 23 fair fair YES Gresham 1 0 0 utilities topped for overhead 7 incense cedar Calocedrus decurrens 20 fair fair YES Gresham 1 0 0 utilities 8 incense cedar Calocedrus decurrens 25 good good YES Gresham 1 0 0 previously topped with 9 incense cedar Calocedrus decurrens 23 fair fair YES Gresham 1 0 0 multiple leaders 10 incense cedar Calocedrus decurrens 23 fair fair previously topped with YES Gresham 1 0 0 11 incense cedar Calocedrus decurrens 20 good good YES Gresham 1 0 0 12 incense cedar Calocedrus decurrens 19 poor poor broken top, thin crown YES Gresham 1 0 0 13 incense cedar Calocedrus decurrens 19 good good YES Gresham 1 0 0 14 incense cedar Calocedrus decurrens 16 good good YES Gresham 1 0 0 competing leader at 15 incense cedar Calocedrus decurrens 18 good fair YES Gresham 1 0 0 lower trunk 16 incense cedar Calocedrus decurrens 16 good fair multiple leaders YES Gresham 1 0 0 codominant at 1' with 17 incense cedar Calocedrus decurrens 18 good fair YES Gresham 1 0 0 included bark 18 incense cedar Calocedrus decurrens 10 fair good thin crown YES Gresham 1 0 0 19 incense cedar Calocedrus decurrens 17 good good YES Gresham 1 0 0 20 incense cedar Calocedrus decurrens 15 good good YES Gresham 1 0 0 21 incense cedar Calocedrus decurrens 13 fair good thin crown YES Gresham 1 0 0 22 incense cedar Calocedrus decurrens 16 good good YES Gresham 1 0 0 23 incense cedar Calocedrus decurrens 17 good good YES Gresham 1 0 0 24 incense cedar Calocedrus decurrens 18 good good YES Gresham 1 0 0 multiple leaders at 15', 25 incense cedar Calocedrus decurrens 18 good fair surface root growth over YES Gresham 1 0 0 curb 26 incense cedar Calocedrus decurrens 14 good good YES Gresham 1 0 0 27 incense cedar Calocedrus decurrens 20 good good YES Gresham 1 0 0 28 incense cedar Calocedrus decurrens 22 good good YES Gresham 1 0 0 29 incense cedar Calocedrus decurrens 20 good good YES Gresham 1 0 0 30 incense cedar Calocedrus decurrens 20 good fair multiple leaders at 20' YES Gresham 1 0 0 31 incense cedar Calocedrus decurrens 19 good good YES Gresham 1 0 0 32 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0

Teragan Associates, Inc. 3145 Westview Circle • Lake Oswego, OR 97034 Phone: 971.295.4835 • Fax: 503.697.1976 Email: [email protected] • Website: teragan.com {R1} Tree Plan for Division Transit Project, Gresham July 31, 2019 Marianne Zarkin, MZLA Page 7 of 26

Attachment 1

Arborist PRIV- Teragan Nuisance/ Oversight Pot. KEEP=0 Common Name Scientific Name DBH Condition Structure Comments City DEMO=1 ; PP Mit. Total Mit. Tree No. Invasive during Mit. REMOVE=1 PRIV-KEEP=0 Construction? 33 incense cedar Calocedrus decurrens 25 good fair multiple leaders at 25' YES Gresham 1 0 0 34 incense cedar Calocedrus decurrens 25 good good YES Gresham 1 0 0 35 incense cedar Calocedrus decurrens 25 good fair multiple leaders at 15' YES Gresham 1 0 0 36 incense cedar Calocedrus decurrens 23 good good YES Gresham 1 0 0 37 incense cedar Calocedrus decurrens 27 good good YES Gresham 1 0 0 38 incense cedar Calocedrus decurrens 29 good fair codominant at 4' YES Gresham 1 0 0 39 incense cedar Calocedrus decurrens 25 good good YES Gresham 1 0 0 40 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0 41 incense cedar Calocedrus decurrens 27 good good YES Gresham 1 0 0 42 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0 43 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0 44 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0 45 incense cedar Calocedrus decurrens 28 good fair multiple leaders at 6' YES Gresham 1 0 0 46 incense cedar Calocedrus decurrens 21 good good YES Gresham 1 0 0 47 incense cedar Calocedrus decurrens 25 good good YES Gresham 1 0 0 codominant at 5' with 48 incense cedar Calocedrus decurrens 35 good fair YES Gresham 1 0 0 included bark Crimson King Acer platanoides 49 13 fair fair x multiple leaders Gresham 1 1 1 maple 'Crimson King'

Crimson King Acer platanoides 50 11 fair fair x multiple leaders Gresham 1 1 1 maple 'Crimson King' Crimson King Acer platanoides 51 11 fair fair x multiple leaders Gresham 1 1 1 maple 'Crimson King' Crimson King Acer platanoides 52 9 fair fair x multiple leaders Gresham 1 1 1 maple 'Crimson King' Crimson King Acer platanoides 53 12 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 54 11 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 55 11 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 56 12 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King'

57 sweetgum Liquidambar styraciflua 14 good fair codominant at 18' Gresham 1 1 1

58 purpleleaf plum Prunus cerasifera 12 fair fair multiple leaders Gresham 1 1 1

59 purpleleaf plum Prunus cerasifera 12 fair fair multiple leaders Gresham 1 1 1

multiple leaders at 6' 60 sweetgum Liquidambar styraciflua 11 good fair Gresham 1 1 1 with included bark

Attachment 1

61 sweetgum Liquidambar styraciflua 10 good fair multiple leaders at 8' Gresham 1 1 1

62 sweetgum Liquidambar styraciflua 9 good fair codominant at 18' Gresham 1 1 1

thin crown, multiple 63 sweetgum Liquidambar styraciflua 9 fair fair Gresham 1 1 1 leaders

64 purpleleaf plum Prunus cerasifera 9 fair fair multiple leaders Gresham 1 1 1

65 purpleleaf plum Prunus cerasifera 9 fair fair multiple leaders Gresham 1 1 1

66 purpleleaf plum Prunus cerasifera 9 fair fair multiple leaders Gresham 1 1 1

67 sweetgum Liquidambar styraciflua 18 good fair codominant at 20' Gresham 1 1 1

68 sweetgum Liquidambar styraciflua 13 good fair multiple leaders at 20' Gresham 1 1 1

69 sweetgum Liquidambar styraciflua 13 good fair multiple leaders Gresham 1 0 0

70 sweetgum Liquidambar styraciflua 14 good fair multiple leaders Gresham 1 0 0 71 purpleleaf plum Prunus cerasifera 11 fair fair multiple leaders Gresham 1 0 0 72 purpleleaf plum Prunus cerasifera 11 fair fair multiple leaders Gresham 1 0 0 73 purpleleaf plum Prunus cerasifera 14 fair fair multiple leaders Gresham 1 0 0 74 purpleleaf plum Prunus cerasifera 10 fair fair multiple leaders Gresham 1 0 0 75 sweetgum Liquidambar styraciflua 11 good fair multiple leaders Gresham 1 0 0

76 sweetgum Liquidambar styraciflua 13 good fair multiple leaders Gresham 1 0 0

77 callery pear Pyrus calleryana 9 fair fair multiple leaders Gresham 1 0 0 78 callery pear Pyrus calleryana 11 fair fair multiple leaders Gresham 1 0 0 multiple leaders, 78.5 callery pear Pyrus calleryana 11 fair fair Gresham 1 0 0 moderately thin crown 79 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 0 0 80 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 0 0 81 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 1 1 82 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 1 1 83 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 0 0 84 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 0 0 Crimson King Acer platanoides 85 11 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 86 11 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King'

Attachment 1

Arborist PRIV- Teragan Nuisance/ Oversight Pot. KEEP=0 Common Name Scientific Name DBH Condition Structure Comments City DEMO=1 ; PP Mit. Total Mit. Tree No. Invasive during Mit. REMOVE=1 PRIV-KEEP=0 Construction? Crimson King Acer platanoides 87 10 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 88 8 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 89 9 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 90 9 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 91 9 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides 92 12 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' 93 sweetgum Liquidambar styraciflua 16 good fair multiple leaders YES Gresham 1 0 0 0 0 roots pruned with recent 93.5 sweetgum Liquidambar styraciflua 15 good good YES Gresham 1 0 0 0 0 sidewalk repair

94 sweetgum Liquidambar styraciflua 15 fair fair previous leader failures Gresham 1 1 1 1 1

95 sweetgum Liquidambar styraciflua 18 good fair multiple leaders YES Gresham 1 0 0 0 0

96 sweetgum Liquidambar styraciflua 16 good fair multiple leaders YES Gresham 1 0 0 0 0

97 sweetgum Liquidambar styraciflua 16 good fair multiple leaders YES Gresham 1 0 0 0 0

98 sweetgum Liquidambar styraciflua 16 good fair multiple leaders YES Gresham 1 0 0 0 0

99 sweetgum Liquidambar styraciflua 15 good fair multiple leaders YES Gresham 1 0 0 0 0 excessive lower branch 100 callery pear Pyrus calleryana 1 fair fair Gresham 1 0 0 pruning 101 callery pear Pyrus calleryana 0 very poor very poor broken off at 1' Gresham 0 1 0 102 callery pear Pyrus calleryana 2 good fair multiple leaders Gresham 1 0 0 European white 103 Betula pendula 8 fair fair multiple leaders Gresham 1 0 0 birch Crimson King Acer platanoides 104 9 good fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides history of improper 105 15 fair fair x Gresham 1 0 0 maple 'Crimson King' pruning cuts Crimson King Acer platanoides history of improper 106 14 fair fair x Gresham 1 0 0 maple 'Crimson King' pruning cuts history of improper Crimson King Acer platanoides 107 15 poor poor x pruning cuts, extensive Gresham 1 0 0 maple 'Crimson King' cankers at lower trunk

Attachment 1

history of improper Crimson King Acer platanoides 108 11 poor poor x pruning cuts, sloughing Gresham 1 0 0 maple 'Crimson King' cracked bark Crimson King Acer platanoides history of improper 109 12 fair fair x Gresham 1 0 0 maple 'Crimson King' pruning cuts Crimson King Acer platanoides 110 9 fair fair x multiple leaders Gresham 1 0 0 maple 'Crimson King' Crimson King Acer platanoides multiple leaders, history 111 13 fair fair x Gresham 1 0 0 maple 'Crimson King' of improper pruning cuts 112 red maple Acer rubrum 11 good fair multiple leaders Gresham 1 0 0 0 113 red maple Acer rubrum 10 good fair multiple leaders Gresham 1 0 0 0 114 red maple Acer rubrum 6 good fair multiple leaders Gresham 1 0 0 0 115 red maple Acer rubrum 7 good fair multiple leaders Gresham 1 0 0 0 116 red maple Acer rubrum 5 good fair multiple leaders Gresham 1 0 0 0 117 red maple Acer rubrum 4 poor poor extensive sunscald Gresham 1 0 0 0 118 red maple Acer rubrum 2 good fair multiple leaders Gresham 1 1 1

119 red maple Acer rubrum 5 fair fair multiple leaders Gresham 1 1 1

120 red maple Acer rubrum 4 poor poor extensive sunscald Gresham 1 0 0 121 flowering cherry Prunus serrulata 9 good fair multiple leaders Gresham 1 0 0 Crimson King Acer platanoides 122 14 good good x Gresham 1 0 0 0 0 maple 'Crimson King'

123 red maple Acer rubrum 3 poor poor significant sunscald Gresham 1 1 1

124 red maple Acer rubrum 4 poor poor significant sunscald Gresham 1 1 1

Crimson King Acer platanoides 125 13 good fair x multiple leaders Gresham 0 1 1 1 1 maple 'Crimson King' Crimson King Acer platanoides history of improper 126 8 fair fair x Gresham 1 0 0 0 maple 'Crimson King' pruning cuts Crimson King Acer platanoides 127 10 good fair x multiple leaders Gresham 1 0 0 0 maple 'Crimson King' Crimson King Acer platanoides history of improper 128 11 fair fair x Gresham 1 0 0 0 maple 'Crimson King' pruning cuts 129 Freeman maple Acer x freemanii 6 good good Gresham 1 0 0 0 129.5 vine maple Acer circinatum 1x7 good good not a tree species Gresham 0 0 0 0 codominant at 7' with 130 Freeman maple Acer x freemanii 8 good fair Gresham 1 0 0 included bark multiple leaders with 131 linden Tilia sp. 10 good fair Gresham 1 0 0 included bark 132 linden Tilia sp. 16 good fair codominant at 6' Gresham 1 0 0 133 linden Tilia sp. 13 good fair codominant at 7' Gresham 1 0 0

Attachment 1

Arborist PRIV- Teragan Nuisance/ Oversight Pot. KEEP=0 Common Name Scientific Name DBH Condition Structure Comments City DEMO=1 ; PP Mit. Total Mit. Tree No. Invasive during Mit. REMOVE=1 PRIV-KEEP=0 Construction? 134 linden Tilia sp. 14 good fair multiple leaders at 8' Gresham 1 0 0 134.5 linden Tilia sp. 14 good fair multiple leaders at 8' Gresham 1 0 0 135 linden Tilia sp. 11 good fair multiple leaders Gresham 1 0 136 linden Tilia sp. 10 good fair multiple leaders at 6' Gresham 1 0 0

137 linden Tilia sp. 8 good fair multiple leaders at 5' Gresham 1 1 1

138 Douglas-fir Pseudotsuga menziesii 41 fair fair one sided Gresham 1 0 0

139 Douglas-fir Pseudotsuga menziesii 0 very poor very poor stump Gresham 1 0 0

moderately thin crown, 140 Douglas-fir Pseudotsuga menziesii 43 fair fair codominant stem YES Gresham 1 0 0 previously removed moderately thin crown, 141 Douglas-fir Pseudotsuga menziesii 37 fair fair YES Gresham 1 0 0 one sided moderately thin crown, 142 Douglas-fir Pseudotsuga menziesii 24 fair fair codominant stem YES Gresham 1 0 0 previously removed

143 Douglas-fir Pseudotsuga menziesii 42 good fair multiple leaders at 10' YES Gresham 1 0 0

European white one sided, overtopped by 144 Betula pendula 6 fair poor Gresham 1 1 1 0 0 birch adjacent trees

145 Douglas-fir Pseudotsuga menziesii 15 fair fair moderately suppressed Gresham 1 1 1 1 1

one sided, moderately 146 Douglas-fir Pseudotsuga menziesii 7 fair fair Gresham 1 1 1 suppressed

147 Douglas-fir Pseudotsuga menziesii 3 poor poor suppressed Gresham 1 1 1 0 0

148 Norway maple Acer platanoides 6 fair fair x one sided Gresham 1 1 1 0 0

codominant at ground 149 Douglas-fir Pseudotsuga menziesii 8,7 fair fair Gresham 1 1 1 1 1 level

Attachment 1

n/a not a 150 arborvitae Thuja sp. n/a very poor very poor dead, not a tree species Gresham 0 tree

n/a not a 151 arborvitae Thuja sp. n/a very poor very poor dead, not a tree species Gresham 0 tree

152 photinia Photinia sp. n/a n/a n/a not a tree species Gresham 0 shrub

153 photinia Photinia sp. n/a n/a n/a not a tree species Gresham 0 shrub

multiple leaders, 154 honeylocust Gleditsia triacanthos 28 fair fair Gresham 1 0 extensive ivy

155 English hawthorn Crataegus monogyna 7 poor poor x significant dieback Gresham 1 1 1

156 Douglas-fir Pseudotsuga menziesii 15 good fair moderately one sided Gresham 1 1 1 1 1

157 Douglas-fir Pseudotsuga menziesii 18 good fair moderately one sided Gresham 1 1 1 1 1

Pinus contorta subsp. 158 shore pine 18 good fair codominant at 15' Gresham 1 1 1 1 1 contorta

Pinus contorta subsp. sequoia pitch moth 159 shore pine 12 good fair Gresham 1 0 0 contorta symptoms 160 sweetgum Liquidambar styraciflua 22 good fair multiple leaders YES Gresham 1 0 0 0 0 161 callery pear Pyrus calleryana 8 good fair multiple leaders Gresham 1 0 162 callery pear Pyrus calleryana 9 good fair multiple leaders Gresham 1 0 not maintained, size 163 orchard apple Malus domestica 30 fair fair estimated; Metro-owned YES Gresham 1 0 land

codominant at 15' with 164 red oak Quercus rubra 42 good fair included bark; Metro- YES Gresham 1 0 owned land

Attachment 1

Arborist PRIV- Teragan Nuisance/ Oversight Pot. KEEP=0 Common Name Scientific Name DBH Condition Structure Comments City DEMO=1 ; PP Mit. Total Mit. Tree No. Invasive during Mit. REMOVE=1 PRIV-KEEP=0 Construction? multiple leaders at 8', 165 red oak Quercus rubra 20 good fair topped for overhead Gresham 1 0 0 0 0 utilities TOTALS: 36 10 7 32 Private Removals property PP Mit. Total Mit. removals

TREE PROTECTION NOTES: FROM ARBORIST'S REPORT:

1. SEE ARBORIST'S DRAFT REPORT DATED 7/15/2019 FOR ARBORISTS SPECIFIC DEMOLITION: ANY DEMOLITION OF PAVEMENT OR OTHER IMPROVEMENTS WITHIN THE CRITICAL INSTRUCTIONS FOR WORK AT EXISTING TREES. ROOT ZONES SHALL OCCUR UNDER PROJECT ARBORIST SUPERVISION. HEAVY EQUIPMENT SHALL BE POSITIONED OUTSIDE THE CRITICAL ROOT ZONES AND CARE SHALL BE TAKEN NOT 2. NO FILL OR COMPACTION SHALL OCCUR WITHIN THE ROOT ZONES OF ANY OF THE TO DISTURB THE EXISTING SOIL SURFACE WITHIN THE CRITICAL ROOT ZONES DURING PROTECTED TREES. DEMOLITION ACTIVITIES. · EXCAVATION: EXCAVATION WITHIN THE CRITICAL ROOT ZONES OF TREES TO BE RETAINED 3. ALL SITE CONSTRUCTION WORKERS SHALL PREVENT DAMAGE TO TREES INCLUDING SHALL OCCUR UNDER PROJECT ARBORIST SUPERVISION AS FOLLOWS: BARK & PROTECTED ROOT ZONES. DAMAGE TO TREES SHALL BE SUBJECT TO FINES, PENALTIES & MITIGATION FOR TREES DAMAGED OR DESTROYED DURING · CAREFULLY EXCAVATE ADJACENT TO THE TREES BY PULLING SHALLOW LAYERS OF CONSTRUCTION. SEE SPECIFICATIONS. SOIL AWAY FROM THE TREES WITH THE PROJECT ARBORIST PROBING THE SOIL IN EXISTING TREE BETWEEN LAYER REMOVAL TO IDENTIFY ROOTS GREATER THAN 2-INCHES IN 4. THE FENCING SHALL BE FLUSH WITH THE INITIAL UNDISTURBED GRADE. DIAMETER. IF ROOTS GREATER THAN 2-INCHES IN DIAMETER ARE ENCOUNTERED DURING EXCAVATION, THEY SHALL BE HAND EXCAVATED AND RETAINED IN PLACED 5. ENCROACHMENTS INTO THE ROOT PROTECTION ZONE ARE ALLOWED PROVIDED: UNTIL THE FULL EXTENT OF STRUCTURAL ROOTS CAN BE DETERMINED. a. THE AREA OF ALL ENCROACHMENTS IS LESS THAN 25 PERCENT OF THE TOTAL ROOT · IF THE PROJECT ARBORIST DETERMINES THAT CERTAIN ROOTS ARE NOT CRITICAL TO PROTECTION ZONE AREA. TREE HEALTH AND/OR STABILITY, THEY MAY BE APPROVED FOR REMOVAL WITH b. NO ENCROACHMENT IS CLOSER THAN 1/2 THE REQUIRED RADIUS DISTANCE. SHARP PRUNING EQUIPMENT. · IF THE ROOTS ARE CRITICAL TO TREE HEALTH AND/OR STABILITY, THE 5. THE TREE PROTECTION ZONE SHALL REMAIN FREE OF CHEMICALLY INJURIOUS IMPROVEMENTS MAY NEED TO BE MODIFIED TO RETAIN THE CRITICAL ROOTS IF MATERIALS AND LIQUIDS SUCH AS PAINTS, THINNERS, CLEANING SOLUTIONS, POSSIBLE AND APPROVED BY THE PROJECT TEAM. · IF MODIFYING THE IMPROVEMENTS IS NOT FEASIBLE, ADDITIONAL TREES MAY NEED PORTABLE TOILETS, HAZARDOUS WASTE, PETROLEUM PRODUCTS, AND CONCRETE TO BE REMOVED. OR DRY WALL EXCESS, CONSTRUCTION DEBRIS, OR RUN-OFF. ORANGE EXTRUDED PLASTIC MESH · REPAVING: WHEN REPAVING OCCURS WITHIN THE TREE PROTECTION ZONES WHERE 6. TREE PROTECTION FENCE SHALL BE A MINIMUM OF 1 FOOT RADIUS (MEASURED EXISTING PAVEMENT WAS REMOVED, REUSE OR CAREFULLY REPLACE THE EXISTING AWAY FROM THE FACE OF THE TREE TRUNK) FOR EACH INCH OF TREE DIAMETER. 6' METAL POST BASE ROCK MATERIALS UNDER PROJECT ARBORIST SUPERVISION WITHOUT DRIVEN INTO EXCAVATING BELOW THE EXISTING NATIVE SOIL GRADE. 7. PROTECTION FENCING CONSISTING OF A MINIMUM 6-FOOT HIGH METAL CHAIN GROUND LINK CONSTRUCTION FENCE, SECURED WITH 8-FOOT METAL POST SHALL BE · STUMP REMOVAL: THE STUMPS OF TREES TO BE REMOVED FROM WITHIN THE ESTABLISHED AT THE EDGE OF THE ROOT PROTECTION ZONE. MINIMUM 18 INCH CRITICAL ROOT ZONES OF RETAINED TREES WILL NEED TO BE CAREFULLY GROUND OUT OR HAVE THEIR STRUCTURAL ROOTS CUT BEFORE PULLING WITH AN

3.5' EMBEDMENT 8. REQUIRED SIGNAGE DESIGNATING THE PROTECTION ZONE AND PENALTIES FOR EXCAVATOR TO PROTECT THE ROOT SYSTEMS OF THE TREES TO BE RETAINED. VIOLATIONS SHALL BE SECURED IN A PROMINENT LOCATION ON EACH 10'-0" · PROTECT TREE CROWNS PROTECTION FENCE. : CARE WILL NEED TO BE TAKEN TO NOT CONTACT OR MAX. OTHERWISE DAMAGE THE CROWNS OR BRANCHES OF RETAINED TREES THAT EXTEND OUTSIDE OF THE TREE PROTECTION ZONES. 9. THE FOLLOWING IS PROHIBITED WITHIN THE ROOT PROTECTION ZONE OF EACH TREE OR OUTSIDE THE LIMITS OF THE DEVELOPMENT IMPACT AREA: GROUND · CROWN PRUNING: CLEARANCE PRUNING MAY BE REQUIRED FOR THE TREES DISTURBANCE OR CONSTRUCTION ACTIVITY INCLUDING VEHICLE OR EQUIPMENT DIRECTLY ADJACENT TO CONSTRUCTION. ALL PRUNING SHALL BE COMPLETED BY A ACCESS (BUT EXCLUDING ACCESS ON EXISTING STREETS OR DRIVEWAYS0, QUALIFIED TREE SERVICE WITH AN ISA CERTIFIED ARBORIST ON SITE. ALL PRUNING STORAGE OF EQUIPMENT OR MATERIALS INCLUDING SOIL, TEMPORARY OR SHALL BE IN ACCORDANCE WITH ANSI A300 PRUNING STANDARDS AND Z133.1 PERMANENT STOCKPILING, PROPOSED BUILDINGS, IMPERVIOUS SURFACES. SAFETY STANDARDS. NO MORE THAN 20 PERCENT OF THE LIVE FOLIAGE OF A TREE UNDERGROUND UTILITIES, EXCAVATION OR FILL, TRENCHING OR OTHER WORK SHOULD BE REMOVED IN ANY ONE GROWING SEASON AND THE LIVE CROWN SHALL ACTIVITIES. COMPRISE AT LEAST THE TOP 50 PERCENT OF THE TOTAL TREE HEIGHT AFTER EXISTING TREE CLEARANCE PRUNING IS COMPLETE. THE PRUNING SHALL BE THE MINIMUM NEEDED 10. THE FENCE SHALL BE INSTALLED BEFORE ANY GROUND DISTURBING ACTIVITIES TO ACHIEVE THE REQUIRED CLEARANCE. INCLUDING CLEARING AND GRADING, OR CONSTRUCTION STARTS; AND SHALL · ARBORIST OVERSIGHT: BASED ON THE LOCATIONS OF THE PROPOSED DEMOLITION REMAIN IN PLACE UNTIL FINAL INSPECTION. AND CONSTRUCTION, ONSITE SUPERVISION OF THE PROJECT ARBORIST WILL BE REQUIRED FOR TREES 93, 93.5, 95, 96, 97, 99, 140 THROUGH 143, 160, 163, 164, 211, 11. SEE SPECIFICATIONS FOR APPROPRIATE PLANTING AND IRRIGATION INSTALLATION 241, 275, 289, 294 AND 312. WITHIN TREE PROTECTION ZONES.

12. THE SCOPE OF WORK FOR THIS PERMIT INCLUDES DEMOLITION, TREE REMOVAL, GRADING, RETAINING WALLS, AND UNDERGROUND UTILITIES. INFORMATION REGARDING CURBING, PAVING, BUILDING FOOTPRINTS, AND NEW LANDSCAPING IS SHOWN FOR REFERENCE ONLY AND IS NOT A PART OF THIS PERMIT.

TREE REMOVAL NOTES: 4'-0" METAL

, TM-PAPER, PM 2:09:23 7/2/2019 , TM-PAPER, POST 4'-0" 1. DURING TREE REMOVALS, PROTECT UTILITIES SUCH AS WATER METERS AND FIRE MIN. HYDRANTS. 8'-0" MAX.

GISTERE RE D 396 WSP USA Inc. 851 SW Sixth Ave Marianne Zarkin L

Marianne H. Zarkin Parsons Brinckerhoff Since 1885 LANDSCAPE ARCHITECTS A T Suite 1600 N C Portland, OR 97204 1326 NE 63rd AVE. PRELIMINARYOREGON E Tel: 1 503 274 8772 Portland, OR 97213 D NOT FOR c. 503.758.3131 MARIANNE ZARKIN, ASLA 5/8/98 T [email protected] SC HI o. 503.802.0031 C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5001.DWG APE A R C CONSTRUCTION

CHECK PRINT 7/2/2019 2:09 PM C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5002.DWG, TM-PAPER, 7/31/2019 11:24:52 AM Marianne Zarkin, MZLA Tree Plan for Division Transit Project, Gresham SHRUBS TREES PLANT SCHEDULE O I Lonicera pileata LON PIL Lonicera nitida `Red Tips` LON RED Ligustrum japonicum 'Texanum' LIG JAP Pinus nigra PIN NIG Parrotia persica `Ruby Vase` PAR RUB Liquidambar rotundiloba LIQ ROT Cimarron Green Ash Raywood Ash Fraxinus pennsylvanica `Cimarron` FRA CIM Fraxinus oxycarpa `Raywood` TM FRA OXY Fraxinus excelsior Àureafolia` FRA EXE S O Pseudotsuga menziesii PSE DOU Pinus nigra Àrnold Sentinel` PIN ARN T I Itea virginica 'Little Henry' ITE LIT CODE CODE I B Cistus x obtusifolius CIS OBT Ceanothus thyrsiflorus `Repens` CEA REP I R ikoblb PictnSnr`Princeton Sentry Ginkgo Autumn Gold Ginkgo Ginkgo biloba `Princeton Sentry` GIN PR2 Ginkgo biloba Àutumn Gold` TM GIN AUT Cornus kousa x nuttalli Forest Pansy Redbud COR VEN Cercis canadensis `Forest Pansy` TM CER FOR U O uru riet Frs re`Forest Green Oak Quercus frainetto `Forest Green` QUE FOR U R Juniperus procumbens `Nana` JUN PRO E U Zelkova serrata `Musashino` ZEL MUS Zelkova serrata `JFS-KW1' ZEL CI2 R U Arctostaphylos x `Sunset` St. Helena Manzanita ARC SU2 Arctostaphylos manzanita `St. Helena` ARC STH Acer rubrum `Scarlet Sentinel` ACE SCA T N Styrax japonicus `Snowcone` STY SNO BOTANICAL NAME BOTANICAL NAME

Rock Rose Repens Ceanothus Privet Honeysuckle Red Tips Box Honeysuckle Ruby Vase Persian Parrotia Douglas Fir Golden Desert Ash COMMON NAME COMMON NAME Wax Leaf Privet City Sprite Zelkova Virginia Sweetspire Austrian Black Pine Venus Dogwood rodSnie utinBakPn 6` ht. Arnold Sentinel Austrian Black Pine Sunset Manzanita Scarlet Sentinel Maple Shore Juniper Sweet Gum Sawleaf Zelkova nwoeJpns nwel2.5" Cal. Snowcone Japanese Snowbell

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Parsons Brinckerhoff Since 1885 Limb. to 6` ht. Limb to 6` ht. 1 1 Llimb to 6` ht. 1 Limb to 6` ht. 1 1 Limb to 6` ht. 1 1 Limb to 6` ht. 7 Limb to 6` ht. 7 QTY QTY Limb to 6` ht. Llimb to 6` ht. 3 3 Limb to 6` ht. 3 2 4 Limb to 6` ht. 4 4 2 Portland, OR 97204 Suite 1600 851 SW Sixth Ave WSP USA Inc. Tel: 1 503 274 8772 REMARKS REMARKS 1326 NE 63rd AVE. Portland, OR 97213 Marianne Zarkin o. 503.802.0031 c. 503.758.3131 LANDSCAPE ARCHITECTS STORMWATER PLANTERS GROUND COVERS [email protected] MARIANNE ZARKIN, ASLA A B Carex obnupta CAR OBN U A Juncus patens JUN PAT CODE O E Cornus sericea `Kelsey` COR SER A V Vaccinium ovatum VAC OVA P O Spiraea japonica `Goldmound` SPI MOU Spiraea betulifolia `Tor` SPI TOR U A Rubus calycinoides RUB CAL Liriope spicata LIR CRE A E Mahonia repens MAH REP CODE BOTANICAL NAME BOTANICAL NAME California Gray Rush Evergreen Huckleberry Birchleaf Spirea Kelsey Dogwood Gold Mound Spirea COMMON NAME Slough Sedge Green Carpet Raspberry Creeping Mahonia Creeping Lily Turf COMMON NAME a.2"oc 576 24" o.c. 1 gal. a.2"oc 313 24" o.c. 1 gal. a.4"oc 74 48" o.c. 1 gal. a.4"oc 96 42" o.c. 1 gal. a.3"oc 87 30" o.c. 1 gal. a.2"oc 136 27" o.c. 1 gal. SIZE a.1"oc 341 12" o.c. 1,340 1 gal. 24" o.c. 57 1 gal. 18" o.c. 1 gal. SIZE SPACING SPACING QTY QTY REMARKS REMARKS Page 15 of 26 July 31, 2019 Attachment 2 C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5027.DWG, TM-PAPER, 7/29/2019 4:05:44 PM Marianne Zarkin, MZLA Tree Plan for Division Transit Project, Gresham

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GISTERE RE D 396 WSP USA Inc. Marianne Zarkin L Marianne H. Zarkin 851 SW Sixth Ave

Parsons Brinckerhoff Since 1885 LANDSCAPE ARCHITECTS A T Suite 1600 N C Portland, OR 97204 1326 NE 63rd AVE. OREGON E Portland, OR 97213 PRELIMINARYD NOT5/8/98 FOR Tel: 1 503 274 8772 c. 503.758.3131 MARIANNE ZARKIN, ASLA S IT o. 503.802.0031 [email protected] C A CH C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5028.DWG PE A R CONSTRUCTION

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GISTERE RE D 396 WSP USA Inc. Marianne Zarkin L Marianne H. Zarkin 851 SW Sixth Ave

Parsons Brinckerhoff Since 1885 LANDSCAPE ARCHITECTS A T Suite 1600 N C Portland, OR 97204 1326 NE 63rd AVE. OREGON E Tel: 1 503 274 8772 Portland, OR 97213 PRELIMINARYD NOT5/8/98 FOR c. 503.758.3131 MARIANNE ZARKIN, ASLA S IT o. 503.802.0031 [email protected] C A H C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5029.DWG PE A R C CONSTRUCTION

CHECK PRINT 7/9/2019 1:48 PM Tree Plan for Division Transit Project, Gresham July 31, 2019 Marianne Zarkin, MZLA Page 19 of 26 Attachment 2

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GISTERE RE D 396 WSP USA Inc. Marianne Zarkin L 851 SW Sixth Ave Marianne H. Zarkin LANDSCAPE ARCHITECTS A T Parsons Brinckerhoff Since 1885 Suite 1600 N C Portland, OR 97204 1326 NE 63rd AVE. OREGON E Portland, OR 97213 PRELIMINARYD NOT5/8/98 FOR Tel: 1 503 274 8772 c. 503.758.3131 MARIANNE ZARKIN, ASLA S IT o. 503.802.0031 [email protected] C A CH C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5030.DWG PE A R CONSTRUCTION

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GISTERE RE D 396 WSP USA Inc. 851 SW Sixth Ave Marianne Zarkin L

Marianne H. Zarkin Parsons Brinckerhoff Since 1885 Suite 1600 LANDSCAPE ARCHITECTS A T Portland, OR 97204 1326 NE 63rd AVE. N C PRELIMINARYOREGON Tel: 1 503 274 8772 Portland, OR 97213 D NOT FOR E c. 503.758.3131 MARIANNE ZARKIN, ASLA 5/8/98 T o. 503.802.0031 [email protected] SC HI C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5032.DWG APE A R C CONSTRUCTION

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GISTERE RE D 396 WSP USA Inc. Marianne Zarkin L Marianne H. Zarkin 851 SW Sixth Ave LANDSCAPE ARCHITECTS T A Parsons Brinckerhoff Since 1885 Suite 1600 N C Portland, OR 97204 1326 NE 63rd AVE. OREGON E Portland, OR 97213 PRELIMINARYD NOT5/8/98 FOR Tel: 1 503 274 8772 c. 503.758.3131 MARIANNE ZARKIN, ASLA S IT o. 503.802.0031 [email protected] C A CH C:\BMS\WSP-PB-US-PW-02\MZ__LAURA.HARTZELL\DMS67119\L1146-5033.DWG PE A R CONSTRUCTION

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Attachment 3 Tree Protection Recommendations Before Construction Begins 1. Notify all contractors of tree protection procedures. For successful tree protection on a construction site, all contractors must know and understand the goals of tree protection. a. Hold a tree protection meeting with all contractors to explain the goals of tree protection. c. Have all contractors sign memoranda of understanding regarding the goals of tree protection. The memoranda should include a penalty for violating the tree protection plan. The penalty should equal the resulting fines issued by the local jurisdiction plus the appraised value of the tree(s) within the violated tree protection zone per the current Trunk Formula Method as outline in the current edition of the Guide for Plant Appraisal by the Council of Tree & Landscape Appraisers. The penalty should be paid to the owner of the property. 2. Fencing a. Tree protection fencing may be set as shown in Attachment 2. b. The fencing should be put in place before the ground is cleared in order to protect the trees and the soil around the trees from disturbances. c. Fencing should be established by the project arborist based on the needs of the trees to be protected and to facilitate construction. d. Fencing should consist of 4-foot high steel fencing on concrete blocks or 4- foot metal fencing secured to the ground with 6-foot metal posts to prevent it from being moved by contractors, sagging, or falling down. e. Fencing should remain in the position that is established by the project arborist and not be moved without approval from the project arborist until final project approval. 3. Signage a. All tree protection fencing should have signage as follows so that all contractors understand the purpose of the fencing:

TREE PROTECTION ZONE

DO NOT REMOVE OR ADJUST THE LOCATION OF THIS TREE PROTECTION FENCING UNAUTHORIZED ENCROACHMENT MAY RESULT IN FINES

Please contact the project arborist if alterations to the location of the tree protection fencing are necessary.

Todd Prager, Project Arborist, Teragan & Associates, 971-295-4835

b. Signage should be placed every 75-feet or less.

During Construction 1. Protection Guidelines Within the Tree Protection Zones: a. No new buildings; grade change or cut and fill, during or after construction; new impervious surfaces; or utility or drainage field placement should be allowed within the tree protection zones. b. No traffic should be allowed within the tree protection zones. This includes but is not limited to vehicle, heavy equipment, or even repeated foot traffic. c. No storage of materials including but not limiting to soil, construction material, or waste from the site should be permitted within the tree protection zones. Waste includes but is not limited to concrete wash out, gasoline, diesel, paint, cleaner, thinners, etc. d. Construction trailers should not to be parked/placed within the tree protection zones. e. No vehicles should be allowed to park within the tree protection zones. f. No other activities should be allowed that will cause soil compaction within the tree protection zones. 2. The trees should be protected from any cutting, skinning or breaking of branches, trunks or woody roots. 3. The project arborist should be notified prior to the cutting of woody roots from trees that are to be retained to evaluate and oversee the proper cutting of roots with sharp cutting tools. Cut roots should be immediately covered with soil or mulch to prevent them from drying out. 4. Trees that have woody roots cut should be provided supplemental water during the summer months. 5. Any necessary passage of utilities through the tree protection zones should be by means of tunneling under woody roots by hand digging or boring with oversight by the project arborist. 6. Any deviation from the recommendations in this section should receive prior approval from the project arborist.

After Construction 1. Carefully landscape the areas within the tree protection zones. Do not allow trenching for irrigation or other utilities within the tree protection zones. 2. Carefully plant new plants within the tree protection zones. Avoid cutting the woody roots of trees that are retained. 3. Do not install permanent irrigation within the tree protection zones unless it is drip irrigation to support a specific planting or the irrigation is approved by the project arborist. 4. Provide adequate drainage within the tree protection zones and do not alter soil hydrology significantly from existing conditions for the trees to be retained. 5. Provide for the ongoing inspection and treatment of insect and disease populations that are capable of damaging the retained trees and plants. 6. The retained trees may need to be fertilized if recommended by the project arborist. 7. Any deviation from the recommendations in this section should receive prior approval from the project arborist.

Attachment 4 Assumptions and Limiting Conditions

1. Any legal description provided to the consultant is assumed to be correct. The information provided by MZLA and other project consultants was the basis of the information provided in this report. 2. It is assumed that this property is not in violation of any codes, statutes, ordinances, or other governmental regulations. 3. The consultant is not responsible for information gathered from others involved in various activities pertaining to this project. Care has been taken to obtain information from reliable sources. 4. Loss or alteration of any part of this delivered report invalidates the entire report. 5. Drawings and information contained in this report may not be to scale and are intended to be used as display points of reference only. 6. The consultant's role is only to make recommendations. Inaction on the part of those receiving the report is not the responsibility of the consultant. 7. The purpose of this report is to provide updated recommendations for meeting the applicable tree preservation, removal, mitigation, and protection requirements in Section 9.1000 (Tree Regulations) of the Gresham Code.

Teragan & Associates, Inc. 3145 Westview Circle  Lake Oswego, OR 97034 Phone: 971.295.4835  Fax: 503.697.1976 Email: [email protected]  Website: teragan.com