Loading...
HomeMy WebLinkAbout20221107_4-Reclamation Attachment 4 Reclamation Plan \40/ VEGETATION PLAN 1. All of the disturbed area will be covered with dirt and or gravel as needed to prepare for seeding or future use within 21 days of completion of any phase of grading. 2. The surfaces to be seeded will be roughed and tilled to prepare a seed bed. 3. The following Lime and fertilizer mix will be used to prepare the soil for the seeds: Agricultural lime 2,000#/acre Fertilizer 1,000#/acre 4. The following seed specifications will be used paying special attention to the date of seeding and seeds required for that season: Dates Species Rate#/acre Feb 15—March 31 Korean Lespedeza 10 Fescue 40 Redtop/Cloves 1 Winter Rye(grain) 15 April 1 —July 31 Common Bermuda 50 Aug. 1 —Oct. 25 Lespedeza.(unscarified) 30 German Millet 40 Oct. 26—Feb 14 Rye(grain—temporary) 120 Spring/Summer Mixture(Mayl —September 15) Browntop Millet 20 Korean Lespedeza 20 VA 70 Lespedeza 1 Vegetation Plan page.2 Fall/Winter(September 16—April 30) Rye(grain) 120 Korean Lespedeza 20 VA 70 Lespedeza 1 One of the following may also be added to the above mixture Crown Fetch 5 Ladino Clover 5 Alfalfa 5 5. Surface mulch shall be applied after seeding to provide a means of controlling runoff and erosion in disturbed areas. Straw mulch shall be applied at the rate of 1 ton per acre. Straw should be dry,unchopped,unweathered and free of weeds. Wheat or oat straw is preferred and can be spread by machine or hand. Straw must be tacked down to avoid loss by wind. 6. After a vegetation growth is established, fertilization will continue as needed until a sod layer is established. 7. Decorative landscaping may be added later as a beautification project in stable areas, but only in areas not subject to erosion and heavy runoff. 8. In areas where shade is dominating the mixture should substitute Orchard Grass and or Blue Grass for Fescue. 9. Temporary seeding should be performed using 40 pounds of German Millet or Rye(grain)per acre and the fertilizer and lime mix above. 10. Top dressing should be performed within 6 months if a vigorous growth has net been established. Practice Standards and Specifications 6603 Definition Roughening abare soil surface with horizontal grooves running across the slope, stair stepping,or tracking with construction equipment. Purpose To aid the establishment of vegetidye cover from seed,to reduce runoff velocity and Increase infiltration,and to reduce erosion and provide for sediment trap- . ping. Conditions Where Allconstruction slopesrequire surfaceroughening to facilitatestabilization with Practice applies vegetation,particularly.slopes steeper than 3:1. Planning Rough slope surfaces are preferred because they aid the establishment of vegeta- Considerations tion,improve water infiltration.and decrease runoff velocity.Graded areas with smooth,hard surfaces may be initially attractive,but such surfaces increase the potential for erosion.A rough,loose soil surface gives a mulching effect that protects lime,fertilizer,and seed.Nicks in the surface are cooler and provide more favorable moisture conditions than hard,smooth surfaces;this aids seed germination. ' There are different methods for achieving a roughened soil surface on a slope, and the selection of an appropriate method depends upon the type of slope. Roughening methods include stair-step grading,grooving,(Figure 6.03a).and tracking.Factors to be considered in choosing a method are slope steepness, mowing requirements,and whether the slope is formed by cutting or filling. Figure 6.03a Bulldozer treads create grooves pegmnacular to the slope. The slope face should not be back-bladed during the&+al grating operation(source: • + •.��' �•.,.VP .••may •� �► slope • i ,.`• .go ._ w Vol. ' 6.03.1 Design Criteria No formal design is required. Construction CUT SLOPE ROUGHENING FOR AREAS NOT TO BE MOWED Specifications Stair-step grade or groove cut slopes with a gradient steeper than 3:1(Figures 6.03b and 6.03c).Use stair-step grading on any erodible,matedal soft enough to be ripped with a bulldozer. Slopes consisting of soft rock with some subsoil are particularly suited to stair-step grading. Make the vertical cut distance less than the horizontal distance, and slightly slope the horizontal position of the"step"in toward the vertical wall. Do not make individual vertical cuts more than 2 feet in soft materials or more than 3 feet in rocky materials. Grooving uses machinery to create a series of ridges and depressions that run across the slope(on the contour). Groove using any appropriate implement that can be safety Aperated on the slope,such as disks,tillers,spring harrows,or the teeth on a front-end loader bucket.Do not make such grooves less than 3 inches deep nor more than 15 in- ches apart. FILL SLOPE ROUGHENING FOR AREAS NOT TO BE MOWED Place fill slopes with a gradient steeper than 3:1 in lifts not to exceed 9 inches, and make sure each lift is properly compacted Ensure that the face of the slope consists of loose, uncompacted fill 4 to 6 inches deep. Use grooving, as described above,to roughen the face of the slopes,if necessary. Do not blade or scrape the final slope face. CUTS,FILLS,AND GRADED AREAS THAT WILL BE MOWED Make mowed slopes no steeper than 3:1. Roughen these area to shallow grooves by normal tilling,disking,harrowing, • or use of culdpacker-seeder.Make the final pass of any such tillage implement on the contour. Make grooves formed by Stich implements close together(less than 10 inches) and not less than 1 inch deep. Excessive roughness is undesirable where mowing is planned, ROUGHENING WITH TRACKED MACHINERY Limit roughening with tracked machinery to sandy soils to avoid undue com- paction of.the soil surface.Tracking is generally not as effective 6 the other roughening methods described. Operate tracked machinery up and down the slope to leive horizontal depres- sions in the soo.Do not back-blade during the final grading operation: 6.03.2 NOW Practice Standards and Specifications Debrls from slope —�-- above is caught 1I11� 1� 1! by steps. s, 1 2.3, Drainage (depending on material) t•� 4, Greater ----•�- l- than vertical i 1= Out steps with drainage to the back. �! Avoid low spots. Figure 6.43b stair stepping cut slopes(modfied from Va SWCC). L ^ I 6.15 p Groove by cutting furrows ' along the contour.Irregularities.,, 1.30 in the soil surface catch rainwater r and retain lime,fertilizer,and seed, l� - Figure 6.o3c Grooving slopes(modified from Va MCC). 6.03.3 • Seeding---Immediately seed and mulch roughened areas to.obtain optimum seed germination and growth. Maintenance Periodically check the seeded slopes for rills and washes.Fill these areas slight- ly above the original grade,then reseed and mulch as soon as possible. References Surface Stabilization 6.10,Temporary Seeding 6.11,Permanent Seeding 6.14,Mulching Chapter 3,Vegetative Considerations 6.03.4 '