martinhouseclr

161 3 // EXISTING CONDITIONS the west side of the Barton House and continues southward through the lawn. Wear appears to be remnants of a trench dug through the lawn. • Norway maple street tree at north end of the unit is showing signs of stress and staghorn-type dieback. The Summit Terrace • Turf wear at far north end of terrace, likely due to poor drainage and/or lack of sunlight. The Barton House & Paddock • Turf wear at the northeast periphery of the conservatory, likely due to poor drainage and/or lack of sunlight. • Norway maple tree in tree lawn has a large split in the trunk, likely occurred several years ago and has healed over partially. Appears to not be causing major health issues at this time though potential becomes high as it matures. The Courtyard and Porte-cochere • Turf grass (sod) failure exists near the north side of the porte-cochere. • Turf grass wear at the far north end of the pergola edge garden area, possibly due to poor drainage or lack of irrigation. • Drain basin is set above existing finished grade at the far north end of the pergola edge garden and cannot accommodate surface runoff (still drains roof leader). • Fern growth from adjacent visitor center property has penetrated dry set stone wall along western boundary. Unclear if growth is occurring within joints or if caused by density of ferns against wall. • Clothes poles have minor damage at bases near finished turf grade, likely due to lawn mowing and power-trimming maintenance. • Exposed compacted subbase stone visible under porte-cochere, apparently due to ongoing construction activity around driveway. The Gardener’s Cottage and Greenho use • Concrete retaining wall at east end of parcel (retailing garage area grade) showing surface cracks (crazing, non-structural) and what appears to be minor structural cracking outside of provided control joints. Cracks are producing a moderate amount of efflorescence, possibly due to inadequate back of wall drainage. • Foundation remnants of greenhouse are visually crumbling and deteriorated due to age and water penetration. • Concrete walkway within former greenhouse includes several structural slab cracks and is deteriorating due to age and water penetration. • 2x2-foot concrete unit pavers show moderate unit separation and differential settlement. Unit separation is most pronounced along the main path while differential settlement is most pronounced on the offshoot pathway towards the auxiliary greenhouse. Issues are likely due to inadequate subbase depth and/or compaction and the lack of or an inadequate edge restraint system. Fig. 168, bottom Concrete unit paver pathway lacks sufficient edge restraint and exhibits differential settlement. Fig. 167, top Drain basin catches roof leader (above, not visible) but will not accommodate surface runoff.