Council Meeting/Documents/Report dated November 1, 2023 from the Director of Engineering regarding Intersection Cost Comparison - Erskine Lane at Watkiss Way
Staff Report
Report dated November 1, 2023 from the Director of Engineering regarding Intersection Cost Comparison - Erskine Lane at Watkiss Way
November 7, 2023Pages 185–1872 sections
A staff report comparing intersection costs for the Erskine Lane at Watkiss Way project.
November 1, 2023Erskine Lane at Watkiss Way
Construction Impact Assessment and Tree Management Plan for 339, 341, 345 Island Highway
Tree Inventory and Management Table
Page 185–187
| Tag # | Surveyed (Yes/No) | Location (On, Off, Shared, City) | Bylaw protected (Yes/No) | Name (Common) | Name (Botanical) | DBH (cm) | Dripline radius (m) | Critical root zone radius (m) | Condition (Health) | Condition (Structural) | Relative tolerance | Retention suitability | General field observations/remarks | Tree Retention Comments | Retention status |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2347 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 17 | 3 | 2.0 | Fair to poor | Fair | Moderate | Conditional | Being over taken by ivy, limited live crown | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2348 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 34 | 2 | 4.1 | Fair to poor | Fair | Moderate | Conditional | Ivy infestation, health stress, | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2349 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 62 | 6 | 7.4 | Fair to poor | Fair to poor | Moderate | Conditional | Medium size deadwood, extended lower limbs, slight corrected lean to the west | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2350 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 27, 34 | 6 | 6.0 | Fair to poor | Fair to poor | Moderate | Conditional | 27cm stem is dead, large deadwood, rooted in rock, asymmetrical crown weighted to the east | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2351 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 49 | 5 | 5.9 | Fair to poor | Fair to poor | Moderate | Conditional | Sparse canopy, ivy around lower trunk, asymmetrical crown weighted to the east, possible leader loss | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2352 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 50 | 4 | 6 | Fair to poor | Fair | Moderate | Conditional | Sparse canopy, ivy around lower trunk, asymmetrical crown weighted to the south, small deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2353 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 11 | 1 | 1.3 | Poor | Fair to poor | Moderate | Conditional | Very sparse canopy, historical leader loss | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2354 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 35, 26 | 6 | 6.1 | Fair | Fair | Moderate | Conditional | Asymmetrical crown, lean to the east, possible health stress, ivy around base | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2355 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 20 | 2 | 2.4 | Poor | Fair to poor | Moderate | Unsuitable | Advanced health decline, limited canopy area | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2356 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 22 | 5 | 2.6 | Fair | Fair | Moderate | Conditional | Ivy around lower trunk, suppressed | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2357 | Yes | On | Yes | Arbutus | Arbutus menziesii | 24 | 5 | 3.6 | Fair to poor | Fair to poor | Poor | Conditional | Northern stem in decline limited canopy, small to medium sized deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2358 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 21, 28 | 5 | 4.9 | Fair | Fair | Moderate | Conditional | Asymmetrical crown weighted to the west, ivy around lower trunks, small deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2359 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 82 | 6 | 9.8 | Fair | Fair | Moderate | Conditional | Small to medium sized deadwood, some health stress, slight corrected lean to the west | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2360 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 38 | 3 | 4.6 | Fair to poor | Fair to poor | Moderate | Conditional | Ivy around lower trunk, possible leader loss, narrow high crown, health stress | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2361 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 13, 23 | 4 | 3.7 | Fair | Fair | Moderate | Conditional | Asymmetrical crown weighted to the north, | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2362 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 32, 15, 14, 20 | 5 | 6.3 | Fair | Fair to poor | Moderate | Conditional | Included bark at basal unions, lean to the north, cluster of stems, ivy | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2363 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 73 | 6 | 8.8 | Fair | Fair to poor | Moderate | Conditional | Asymmetrical crown, corrected lean to the north, large deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2364 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 61 | 5 | 7.3 | Fair | Fair | Moderate | Conditional | Asymmetrical crown, medium sized deadwood, some health stress | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2365 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 59 | 7 | 7.1 | Fair to poor | Fair to poor | Moderate | Conditional | Extended lower limbs, asymmetrical crown, health stress, codominant with adjacent Douglas fir | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2366 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 58 | 7 | 7.0 | Fair to poor | Fair to poor | Moderate | Conditional | Extended lower limbs, asymmetrical crown, health stress, codominant with adjacent Douglas fir | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2367 | No | On | Yes | Douglas fir | Pseudotsuga menziesii | 14 | 2 | 1.7 | Fair | Fair | Moderate | Conditional | Ivy around trunk, small deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2368 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 27 | 5 | 3.2 | Fair | Fair | Moderate | Conditional | Asymmetrical crown weighted to the north, small deadwood, suppressed | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2369 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 29 | 5 | 3.5 | Fair | Fair to poor | Moderate | Conditional | Partially failed top, resumed apical growth, response growth at 6m, ivy around lower trunk | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2370 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 35 | 3 | 4.2 | Fair | Fair | Moderate | Conditional | High crown, ivy, some health stress | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2371 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 32, 39, 41, 29, 22, 35, 30, 34, 23, 20, 36 | 10 | 9.7 | Fair | Fair to poor | Moderate | Conditional | Small to medium sized deadwood, included bark at lower unions, ivy around lower trunks | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2372 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 7, 13, 14, 10, 10, 6 | 2 | 3.3 | Fair | Fair | Moderate | Conditional | Cluster of stems, ivy around lower trunks | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2373 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 54 | 4 | 6.5 | Fair | Poor | Moderate | Conditional | Historically top loss at 12m, asymmetrical crown, limited canopy area, ivy around lower trunk | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2374 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 46 | 2 | 5.5 | Fair to poor | Fair | Moderate | Conditional | Health stress, asymmetrical crown weighted to the east, sparse canopy, high crown | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2375 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 62 | 5 | 7.4 | Fair to poor | Fair | Moderate | Conditional | Health stress, asymmetrical crown, ivy around lower trunk, small deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2376 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 23, 39* | 7 | 6.3 | Fair to poor | Poor | Moderate | Conditional | Failed stem lodged between the two stems, larger stem partially failed resting in adjacent maple, health stress, smaller stem topped, asymmetrical crown | *Remove failed stem. The project arborist to supervise all excavation required within the critical root zone. | Retain* |
| 2377 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 27, 26, 22 | 5 | 6.6 | Fair | Fair to poor | Moderate | Conditional | Douglas fir stem resting in canopy, 22cm stem damaged by Douglas fir, included bark at base, asymmetrical crown weighted to south | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2378 | Yes | On | Yes | Big leaf maple | Acer macrophyllum | 34, 28, 15, 29 | 8 | 8.2 | Fair | Poor | Moderate | Unsuitable | 15cm stem dead, 29cm stem advanced health decline, ivy around trunk, lean to the south | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2379 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 39 | 4 | 4.7 | Fair to poor | Fair to poor | Moderate | Conditional | Asymmetrical crown, ivy around base, health stress | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2380 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 68 | 7 | 8.2 | Fair to poor | Fair to poor | Moderate | Conditional | Health stress, extended lower limbs, medium sized deadwood, asymmetrical | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2381 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 34 | 3 | 4.1 | Fair to poor | Fair to poor | Moderate | Conditional | Topped, suppressed, health stress, asymmetrical crown | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2382 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 30 | 5 | 3.6 | Fair to poor | Fair to poor | Moderate | Conditional | Possibly topped, asymmetrical crown, health stress, medium sized deadwood | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2383 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 59 | 5 | 7.1 | Fair to poor | Fair | Moderate | Conditional | Health stress, asymmetrical crown, corrected lean to the south | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2384 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 32 | 4 | 3.8 | Fair to poor | Poor | Moderate | Conditional | Topped, deflection in upper trunk, asymmetrical crown, health stress | The project arborist to supervise all excavation required within the critical root zone. | Retain |
| 2385 | Yes | On | Yes | Douglas fir | Pseudotsuga menziesii | 54 | 4 | 6.5 | Fair | Fair | Moderate | Conditional | Health stress, high crown, ivy around trunk, asymmetrical crown | The project arborist to supervise all excavation required within the critical root zone. | Retain |
Page 185–187
Extracted from: 2023 11 07 Council Agenda - Agenda - Pdf