Presentation on theme: "A: 120 ft – Stabilize B: 130 ft – Stabilize C: 30 ft - Stabilize D: 50 ft - Open G: 50 ft - Stabilize I: 55 ft - Stabilize Figure 3: Plan View all dimensions."— Presentation transcript:
A: 120 ft – Stabilize B: 130 ft – Stabilize C: 30 ft - Stabilize D: 50 ft - Open G: 50 ft - Stabilize I: 55 ft - Stabilize Figure 3: Plan View all dimensions are approximate scale: approx.60 ft /in parking lot creek sidewalks campground road outlet N E: 80 ft - Open F: 50 ft - Stabilize H: 50 ft -Stabilize
~ 5 ft > 2:1 Two (2) ~3 ft x 3 ft x 6 ft (H x W x L) galvanized gabions, rotated minimum of 6 . Fill with 4 to 8 in stone. excavate gabion ~ 2 ft below bed cut slopes back to 3H:1V if possible (otherwise 2H:1V) finish slope to outward end of gabions set second gabion back ~ 9 in bed Figure 4: Typical Bank Cross-Section all dimensions are approximate plant slopes with native grass, shrubs and trees creek filter cloth placed under, on top of and behind gabions Staked erosion blanket to cover newly graded surface
http://www.epa.gov/owow/nps/unpavedroads/ch5.pdf Figure 5: Examples of Shrub Placement in or on Gabions creek bed slope Shrubs to be planted 2 per stack of 6-foot long gabions (see detail) Shrub Planting Detail (view from creek or bank) 2’ Ball-stock shrubs (w/ root ball included) Gabions
12-18 ft Native grasses and forbs intermixed among shrubs and trees (hatching not shown) Typical Vegetative Buffer – “Stabilize” shrub density: ~ 1 shrub per 3-5 sq. ft scale: approx. 25 ft /in trees shrubs 12-18 ft Typical Vegetative Buffer – “Open” creek creek creek creek Figure 6: Vegetation Details refer to Figures 3 and 8 for location All dimensions are approximate. Shrub and tree placement shown is not exact - for figurative purposes only. Shrubs can be live stakes or balled stock (root ball included). See notes for more planting information. gabions Erosion mat over entire buffer NO gabions Erosion mat over entire buffer Plant native grasses and forbs only grasses & forbs
A B Figure 7: Plan View with Improvements see Figures 6 and 7 for details on sections A, B, C, D, and E scale: approx.60 ft /in parking lot creek sidewalks campground road outlet C F G trees shrubs D H I E
NOTES: 1.Bank planting & grading areas should be kept to a maximum12-foot width near sidewalks (Areas E and F). 2.Bank slopes shall be graded to 3H:1V where possible, otherwise 2H:1V. 3.If sediments from the creek bed are mechanically removed as part of regular park maintenance, ensure that 2 feet of bed cover remains next to the bottom of the gabions to keep them in place. 4.GABIONS: Nearest supplier of Macaferri gabions is CSI Geoturf – Contact: David Ringle. Phone: (231)943-4002 657 W. Blue Star Drive, Traverse City, Michigan 49684 Technical support and CAD drawings (sometimes for free for public projects): Macaferri Gabions Ken Hughes/Tersea Lynch 2351 Versailles Rd., Ste. 302 Lexington, KY 40504 E-Mail: firstname.lastname@example.org Telephone: email@example.com See attached Macaferri specification sheet for gabions sizing and installation information. 5.See attached U.S. Army Corps of Engineers document SR-22, Gabions for Streambank Erosion Control for installation recommendations. 6.Cost provided for gabions is for galvanized gabions only (not PVC-coated). Cost includes shipping and enough wire for gabion assembly. Can also purchase “hog rings” for connection that can be easier to use/install- additional cost for 90 gabions ~ $700.00. 7.GRASSES: a)A suggested mesic (tolerant to dry and wet conditions) seed mix is attached. This seed mix has been provided by Borealis Seed Co., Marquette, MI. (906) 226-8507. b)Suggested application rate = 1 lb/3,000 sq.ft. Plant throughout vegetated area.
NOTES (continued): 8.SHRUBS: a)Suggested species of shrubs: red-osier dogwood (Cornus stolonifera)red-osier dogwood ninebark (Physocarpus opulifolius)ninebark upland willow (Salix humilis)upland willow pussy willow (Salix discolor)pussy willow b)*Shrubs planted on top of gabions should be balled stock for best establishment. Shrubs planted on bank can be balled stock or live stakes. Live stakes are less expensive, but balled stock establishes more quickly. Also live stakes look, initially less visually appealing. 9.TREES: a)Suggested species of trees: red maple (Acer rubrum)red maple quaking aspen (Populus tremuloides) white or paper birch (Betula papyrifera)white or paper birch 10.EROSION BLANKET & STAKES: a)Curlex HV (High Velocity) Straw/Coconut mat or similar is recommended. www.curlex.com.www.curlex.com b)6” wire stakes are recommended for fastening to bank. See manufacturer instructions for proper installation. c)Erosion blanket to be installed and secured after seeding and fertilization. 11.Suppliers of Trees, Shrubs and Erosion Mat: a)Lake Superior Tree Farm, Chassell,MI, 906-523-6200 (Contact: David Crouch) b)Great Lakes Nursery, Watervliet, MI, 269-468-3323, www.greatlakesnurseryco.com/www.greatlakesnurseryco.com/ c)Cold Stream Nursery, Free Soil, MI, 231-464-5809, www.coldstreamfarm.net/www.coldstreamfarm.net/ d)Engels Nursery, Fennville, MI, 296-543-4123, www.engelsnursery.com/www.engelsnursery.com/ e)*Follow vegetation supplier instructions for planting, fertilization and care. 10.Fertilizer should be applied to bank area when planting vegetation. 3/10/10 fertilizer is recommended. Slow-release fertilizers are not recommended. Follow manufacturer application instructions closely.