HomeMy WebLinkAboutSW5230802_Plansheet - Other_20240612 (8) PERMANENT SEEDING SCHEDULE
Seeding Date: Best Possible
Fall: August 25- September 15 August 20- October 25
Late Winter: February 15- March 21 February 1- April 15
W
Seed Type Rate �D
Tall Fescue 100 lbs./acre Z
Sericea Lespedeza 30 lbs./acre w
Kobe Lespedeza 10 lbs./acre
10-10-10 Fertilizer 1,000 lbs./acre co
Lime 3,000 lbs./acre N
Mulch 4,0001bs./acre �
=���a •,4. .. -{� ,� v°° ° N/T�°oho;; I
r Q
Note 1: Fertilizer and lime application rates may deviate from above if soils are analyzed = = J = = Q° 9
Pp Y Y a .� — _ � -
for optimum rates. y
v".
Note 2: Mulch shall be tacked with emulsified asphalt at rate of 14 to 28 gallons/1,000 sq. ft. �,do °:.• . . p `;
on slopes of 3:1(H:V) or steeper. �fl
-rrrriirrrt�
Note 3: After August 15, use Unscarified Sericea seed for permanent seeding period.
ONSITE CONCRETE WASHOUT
STRUCTURE WITH LINER
10'-0"MIN.
A
o OCDO 0 OR STAPLEDGS TYP.) w
0 La= 10.5' W= 10' + 1 .5' = 11 .5' z o 010 MIL Q
1:1 PLASTIC SANDBAGS(TYP.) Z Z
q O SIDE SLOPE ININGJ OR STAPLES O Q
Figure 6.17d Temporary Channel Liners:Washington State Department of Ecology o O O (TYP.)
_ �xc¢voYe chomel to design g I ^
Overlap 6"min, grade end cross-section 0 O O o Z_X v ,
O
�z Outlet V • oat t, 9"1 .� lb-A J
diameter(Do) l ff w Q
Design depth �K H� ....:..
Longitudinal r 0.SDb ;
\�`• anchor trench ` Z
`off .y .�'itl !, a. l Z
Overcuf channel 2"Fo allow hulking - ,y, c ��,A ` CLEARLY MARKED SIGNAGE SECTION A-A
during seedbed preparation 1., ��t�c I ! CONCRETE NOTING DEVICE(18"X24"MIN.) Q Z
R1 t. 1. WASHOUT Q
s 4olgtr NOTES:ACTUAL LOCATION DETERMINED IN FIELD Q
fr O
4 h a^ �" ' + p 2.THE CONCRETE WASHOUT STRUCTURES SHALL BE ( l t
Typical installation I MAINTAINED WHEN THE LIQUID AND/OR SOLID REACHES �J
with erosion cordrol ;:ij 1 .4 75%OF THE STRUCTURES CAPACITY.
blankets or turf A' • 't1
reinforcement mots
PLAN 3.CONCRETE WASHOUT STRUCTURE NEEDS TO BE
CLEARY MARKED WITH SIGNAGE NOTING DEVICE.
ng 1fl......... - II� .•. ,. 3
Intermittent check slot Longitudinal anchor trench 1 I d
BELOW GRADE WASHOUT STRUCTURE
Shingle-lop spliced ends or,begin NO
new r T TO SCALE
tall in an intermittwTt check slot • ry
p 2 fl} w
Preporesoil and apply seed be -� I ��'^ ' a '� '� yCL
HIGH ( LL
installing blankets,mots or at -+
ofII `5 OUTLET PROTECTION FOR PIPE #1 AND PIPE #2 10'-0"MIN.
temporary chonnel liner - rim { Q. COHESIVE& OR STAPLE
STYP.) V
-.'5 ` I LOW FILTRATION B 10 MIL (-
SOIL BERM HIGH O
COHESIVE&
0 1 - 0 CDO O PLASTIC LINING LOW FILTRATION J
1:1 SIDE SLOPE SOIL BERM W
z O O (TYP.) m ~ >
L- , Z J io 20 50 Igrt zoo spa tnao o 0 Q � o z x Q
Discharge(flaisec) 4.5 ft.
O 0� � g '�
O O
CU"S may not be extrapolated. `Q 0O 2'-0"
� r �stern Co � � O O SECTION B-B � � lw/� z
ro S 'obi e- 11.5 ft. 6" Q
Q =
F(pun 6.e6r()oa qn of outlet protection pratact on Irani tt rpund plpv flewlnp lull,mlr>amum taflwatoe Condit on IT„ O.tS darn0lort n�� B
1,1]esrgn velocities exceeding 2 ftlsec require temporary blankets,mats or similes liners to piercer - SANDBAGS(TYP.) NOTES:
seed and soil until vegetarion hecomes established, O OR STAPLES 1.ACTUAL LOCATION DETERMINED IN FIELD Q
2.Gross-fined channels with design velocities exceeding 6 ftlsec should include turf reinforcement �/"
mats CLEARLY MARKED SIGNAGE 2.THE CONCRETE WASHOUT STRUCTURES Z
CONCRETE NOTING DEVICE(18"X24"MIN.) SHALL BE MAINTAINED WHEN THE LIQUID V U1
6.[7.10 e"r.snrs Rwv.11-93 L".3 10 ft. � WASHOUT AND/OR SOLID REACHES 75%OF THE �
STRUCTURES CAPACITY TO PROVIDE O
ADEQUATE HOLDING CAPACITY WITH A
MINIMUM 12 INCHES OF FREEBOARD.
PLAN &CONCRETE WASHOUT STRUCTURE NEEDS
TO BE CLEARY MARKED WITH SIGNAGE
NOTING DEVICE.
ABOVE GRADE WASHOUT STRUCTURE W
NOT TO SCALE
M
TEMPORARY SEEDING SCHEDULE Z Z N
O
Seeding Date: August 15 to December 15 Seeding Date: January 1 to May 1 Seeding Date: May 1 to August 15 Q > Cn c�
0
Seed Type Rate Seed Type Rate Seed Type Rate 4. Rock ri ra limn Practice 6.15,Rr' -"
c�
Yp Yp YP rip rap &�= P F > 0 � U
CONSTRUCTION ENTRANCE Rye (grain) 120 lbs./acre Rye (grain) 120 lbs./acre German Millet 40 lbs./acre 5. Place Fitts.-rw, brddin#s, and foundatia�n drains to fine and grade in Ilse Z 0 O U
man4er s lfrct . Place Filter and bidding.mafenals iramediutely after slope O
ct
10-10-10 Fertilizer 1,000 tbs./acre Lime 2,000 lbs./acre 10-10-10 Fertilizer 750 lbs./acre V) bA vs
- preparation_ For synthetic filter fabrics, overlap the downs
edge by at W
Lime 2,000 lbs./acre 10-10-10 Fertilizer 750 lbs./acre Lime 2,000 lbs./acre U •� a;
lil:dk5t 12 inr•jq with thr upstream edge which is buried a ininimum 12 [rlfihiES
Mulch 4,000 lbs./acre Mulch 4,000 lbs./acre Mulch 4,000 lbs,/acre its a trench. Ser figure 6.14a, page 6.14.6. Sgaec amr bor piris every3 feel � U 00 � � � ct �
along the overlap. Spread granular materials in a uniform layer. When rnorc Cd W Q z N Q
than one gradafion is requirr� spread the lavers so there L% minimal mixing. n••d W
Vegetation PIan mFalter material shouldd onsEsL of`at tcsst tofihes oC maeeraa) on all gid of ¢ '�the drain pipe. The drain pipe coulduit should fir a minimum of inches in Z O — � O
diameter. AccEpLuble matenals include perforated, canitnuous, closed-joint O Q) OT)
I.Spread topsoil over disturbed areas and leave surface reasonably smooth and uniform. conduits of clay- eonercte, nickel, pl�stie,or arbor suitable material (Practice Z W
6.S 1,Subsurface Drain), r1/ � l
2.Scarify surface to prepare a seedbed four to six inches deep. Use such equipment as 6. P�f� atf channel cunstructian to kccp r-resion and water pollutioo W �nJ
Co a miai.murrl. Imrncdiatcly upon completion of Ll1c cllanncf, v¢gctatr s11 v J �•-�
tilling, discing, tracing, or the teeth on a front end loader. disiL rbed areas or cthcrwise profat them against soil erosion. Wh=chawl-1 W 4�
construction will LAo longer than 10 days,stabilize channels lay machics.
r 3.Mix lime and fertilizer with the soil during seedbed preparation. Z
Maintenance Inspect channels at regular infervals as well as after major rains, and matte.
4.Seed on freshlyprepared seedbed following the application rates for the appropriate r pL in promptly. Give 9mcia) sttuation to the outlet and inlet sections and
p re P ow g a PP e a pp pate season. Litho-paints where canccntrated flow enters_ Careful ly chnelc stability at road Z
5.Mulch all seeded areas immediately. crc+�ings, and look for indications of piping, scour holes, or bmik failures_
lr r r X Make repairs.immediately. Maintain a0 vegetation adjacent to the cha mel in W Q P••I I-3
6.Tack mulch on slopes 3:1 (Horizontal : Vertical) or steeper by spraying with emulsified asphalt. a healthy,vigarmo condition to protect the area from erasion and scourdunng w
Use an anchoring tool such as a farming disc set in a vertical position on slopes less than 3:1. °�'`"° ° ` O
- N %P Mulch netting may also be used on slopes. Z
coarse egg.-agwo References &irf�ceSlabilLattan
7.Inspect seeded areas and make repairs within the planting season. If vegetation is over 60% &11, Pe n orient Setding.
,r.
damaged, repeat steps 2 through 5. 15.15, LCipTap
Runoff C'arrlwyance Meanirm
8.Permanent revegetation shall be accomplished at the specified times of the year. Temporary 6.30.Grass-lined Chanrie9s
vegetation shall be applied outside of the optimal times for establishment of permanent vegetation