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R2026-171 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for a Pond Improvement with KOBS, LLC
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R2026-171 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for a Pond Improvement with KOBS, LLC
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9/18/2026 9:34:42 AM
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9/18/2026 9:34:40 AM
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Resolution/Ordinance
Res Ord Num
R2026-171
Res Ord Title
R2026-171 Resolution Authorizing Lake Decatur Watershed Farmland Conservation Program Agreement for a Pond Improvement with KOBS, LLC
Department
Public Works
Approved Date
9/8/2026
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IL-ENG-11 DATA SHEET U. S. DEPARTMENT OP AGRICULTURE <br /> (Rev. 9/76) SOIL CONSERVATION SERVICE <br /> File Code 11-5 FOR DAMS rye" _`/ <br /> Name /9/ 1!4I,� r pp county //l�cory <br /> By /4./mi J. Q�/,,�ce5 e/DD Date /O-/- 9A Checked by Date <br /> Practice Name Eifil544*eile.O7 &Ili Field No. Sir. No. // Sheet_of <br /> I Hydrologic Soil Group Product Drainage Area efnei sc. <br /> Land Use 1Tre.�tment <br /> A B C D <br /> Acres CN Acrea CN Acres CN Acres CN Ac x CN Average Watershed Slopes: Med. Steep <br /> Without (circle one) (0-Z (3-2) (82+) <br /> Conservation 68 79 86 89 <br /> Cropland With Compute Runoff CN - Total Product <br /> Conservation '63 74 81 85 Drainage Area <br /> Poor 68 79 86 89 <br /> Pasture Fair 49 69 79 84 Use CM - 77 <br /> Good 39 61 74 80 I Principal Emergency <br /> Meadow Good 30 58 71 78Y Spillway Spillway <br /> Poor Cover , 45 66 77 83 <br /> Woodland Fair Cover _ 36 60 73 79 Frequency 1Q yr. ZS yr. <br /> Good Cover 25 55 70 77 <br /> Includes24-Hour Rainfall 5/, , in. .5-2- in. <br /> Roads R.O.W. 74 84 90 92 <br /> Farmsteads 59 74 82 86 Peak Inflow, Qi lig/ cfs 5-93 cfs <br /> Other i <br /> Total Product Watershed Runoff z,F.f in. <br /> PIPE SIZE AND STORAGE REQUIREMENTS <br /> AVAILABLE STORAGE <br /> Area Internal Accum. Storage Pipe dia.a. JO in. Kind q :y0 Length O ft. <br /> Elev. _ flooded Stotaga Sed. andlor Temporary Head 7, ft. Q - 57.0 cfs/ac 0,Qqs <br /> Sq. In. Acres Ac. Ft. Water o cfs; <br /> 90 P/b A g 4 , <2 If cfs/ac is less than 0.4, use Page 11-54.12 EFM. <br /> ����// ! a'/.S Temporary Storage - /V in. (From Chart) <br /> 92 gOJ.b 16,4 2,i.a pa - AL/0? in. x 600 ac. - 7/,0 ac.ft. <br /> 12 <br /> 14 y,0 If cfs/ac is more than 0.4, use Page 11-54.11 EFM. <br /> 941 �/1gi.'1 /17.6 68.p Runoff (in.) x Drainage Area"(ac.) - ac.ft. <br /> I Vr - 12 <br /> 48.V <br /> _40.8 01.g - <br /> Qi <br /> Tr- <br /> 9y9^ V. - kVr - x - ac.ft. <br /> i <br /> 930. ✓ y •' Stage Required - Z. ft. (Prom Stage Storage Curve) <br /> STAGE-STORAGE CURVE n <br /> Stage used - 2,0 ft. <br /> O ■O■ ■ op H - <br /> p ■O:■ O :Alp EMERGENCY SPILLWAY REQUIREMENTS <br /> _i■i:ii■._th; �' :i.0m meisil;i i � '„ •- +1 Q - Em. Spillway Peak.Inflow - Prin. Spillway Peak Inflow <br /> 24911 fifeli1fi�mie !!� !■I • s 1 - 5793 cfs — yB� cfs - jig efe <br /> mmmammmMg.• ■■■r•■•:■•■■•■ ■• meq" g 3 <br /> • ■■•1' ■ • ■ _g� r: ■= Ogg <br /> From EFN Chapter 11, <br /> u �i�:•�:�i:1• =:•f�■■ �: • r6 ■ :■ •�■ ■ �8 ft.; Width - '30 ft. <br /> o. ■ ••■■ ■ ■■■ ■ ■ • ■ ■ Length of Control Section - <br /> u I° 1f 111111/11 f! �fi 110:il :Mg ft. Freeboard - /•0 ft. <br /> ■ • ■ ■■■�■■■■■ 1 ■� ��� Depth (HD) - /, <br /> m 411:111,,,,,1■ ■ ■ ■■ ■ • :lip Exit Slope - Z Min. Slope Z Max. Slope - T <br /> m • ■ ■r �j ■. ■ ■ <br /> o 2:21122:21221up f : : im:�l: i iPHYSICAL DATAo - <br /> ,r, /� , Ciiii ill :1 1il 1.111 <br /> 1■111.1 <br /> 1 Surface Area Pond a. 7 ac. <br /> e :111...1: : 1j■ s . ■e = 1 ■ r • �i e ■ S :■J■ � ft. <br /> °' ii a •liQ3: :•'J � :! i ■■■■ i Maximum Depth of Water___a _-_ <br /> _ft. <br /> i9■ :: lii: n i i 1 ■ 1 Effective fill Ht. P7.2 ft. (Low Point on centerline <br /> SO i f : Ali <br /> !iI l ,■■e 1 � to Emergency Spillway) <br /> : : 01 ■� 9: 3 1 Volume of storage below Em. Spillway, Vt ac.ftII <br /> la�pg0 d11 1 • iI iProduct - Eff. fill Ht. x Vt - <br /> .io03i199 .C�11ili <br /> ■� Sediment Storage: Below Crest ac.ft. <br /> Q4a Stage in Feet it, J.& Above Creat ac.ft. <br /> Elev.; Inlet ,Em.Sp. ,Settled Fill <br />
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