Appendix E - Landscaping Xeriscape Master Plan.pdf

Appendix E

APPENDIX E – LANDSCAPING/XERISCAPING AND URBAN FOREST MASTER

PLAN

1. GENERAL: All new construction and major renovation projects, (facility construction, site design, and landscape construction) will follow best management practices and the following requirements.

2. XERISCAPE LANDSCAPES: Xeriscape landscaping will be the primary comprehensive approach to landscaping for water conservation and pollution prevention for all installation landscape projects. Xeriscape uses native, naturally occurring plant material in the landscape design to convey a sense of regional context while embracing sustainable landscape design and preservation of native and endangered species. Native plants are more acclimated to the climate and require less irrigation. The xeriscape methodology is relevant to planning and design, soil analysis, selection of suitable plants, practical turf areas, efficient irrigation, use of mulches, and appropriate maintenance choices. An emphasis will be given to a desert motif using water resistant plantings. Landscaping will emphasize the architectural lines and features of adjacent buildings and areas, and will be designed to require little or no pruning.

Landscaping will be designed with year-around consideration for human comfort. Passive solar cooling methods will be considered such as deciduous tree shading on the east, south and west exposures.

The intent is to limit or eliminate the use of potable water for landscape irrigation. Irrigation typically uses potable water, although lower quality water is equally effective for irrigating landscapes. Sources of non-potable water include: captured rainwater from roof and parking lot runoff; gray water from building systems; and municipal recycled water supply systems

Water efficiency design strategies will be applied to landscape irrigation by the use of cycle irrigation methods to improve penetration and reduce runoff. For optimal growth, cycle irrigation provides the right amount of water at the right time and place. Designs/retrofits will include the use of low-precipitation-rate sprinklers (better distribution uniformity), bubbler/soaker systems, or drip irrigation systems. For technical information related to irrigation, see UFC 3-420-01, Plumbing Systems; UFGS 32 84 23, Underground Sprinkler

Systems; and UFGS 32 84 24, Irrigation Sprinkler Systems.

2.1.SHRUBS AND TREES: Shrubs and trees will be the most drought resistant varieties, and where possible will be placed without irrigation sprinklers. Large trees will be planted with enough space to facilitate growth and trimming, which will normally dictate that they be planted at least 20-feet apart. Tree removal or replacement shall be coordinated with the

Natural Resources Manager in 75 CEG/CEV. An evaluation of the proposed action will be

Appendix E analyzed, and a determination made as to the need for removal or replacement and the mitigation requirements for live, dead or dying trees

3. SLOPES: All slopes shall be no steeper than 3 to 1. Provide slope protection using recent technology for all slopes.

4. LAWN GRASS: Where lawn grass is used, it shall be provided with irrigation sprinklers, and will be sodded not begun from seed, except for dry land seeding applications. Irrigated lawns shall consider incorporation of a river-run rock or lava rock perimeter to preclude water over spray of sidewalks and pavements.

5. RESTORATION OF NATIVE GROUND COVER: All native ground cover that is disturbed by construction and not scheduled for landscaping shall be re-seeded with drought resistant grasses and legumes. Mixtures of dry land alfalfa, fairway crested wheat grass and

Indian rice grass will be used in good sandy, loam soils. Use sand drop seed with fairway crested wheat grass in gravely soil. Machine drilling on generally level to mildly sloping ground is preferable. Hydro seeding should only be used on 3 to 1 slopes. This native ground cover seeding should take place in April, May, September and the first half of

October only. For MAMS and airfield areas the following seed mixture and application rates shall be used to prevent BASH conditions. For soil preparation an application procedures see

75 CEG/CEIE memorandum dated 25 February 2014

Common Name Variety Rate (lbs./acre)

Western Wheatgrass Rosana 2.5

Intermediate Wheatgrass Oahe 2.0

Streambank Wheatgrass Sodar 4.0

Crested Wheatgrass Hycrest, Roadcrest, or Ephraim 2.0

Sand Drop Seed 0.12

Bluebunch Wheatgrass 2.5

Sheep Fescue 2.0

Total 15.12