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ITEM 4.1 DNR Pond 86-7WOtsezo MINNESOTA C—Do DEPARTMENT INFORMATION Request for City Council Action ORIGINATING DEPARTMENT REQUESTOR: MEETING DATE: Public Works City Engineer Wagner September 11, 2017 PRESENTER(s) REVIEWED BY: ITEM #: City Engineer Wagner City Administrator/Finance Director Flaherty 4.1 AGENDA ITEM DETAILS RECOMMENDATION_ Staff recommends the City Council hold and then close a public hearing to receive public comments regarding the DNR Pond 86-7W Outlet project. ARE YOU SEEKING APPROVAL OF A CONTRACT? IS A PUBLIC HEARING REQUIRED? No Yes BACKG RO UN D/J USTI FICATION: The City is proposing constructing an outlet pipe for the DNR Pond 86-7W (Praught Pond) to DNR Pond 86- 8P to provide an outlet and flood relief for the virtually landlocked upstream pond. Plans and permits have been prepared as ordered by the City Council. Staff received a letter from the DNR dated August 8th, 2017 which stated that they are "changing the permit use from Erosion /Flood Prevention to a Water Level Control Structure type of permit. With this designation change also comes some additional requirements for us to process this permit." One of those requirements is that the "City hold a public hearing on the proposal and provides the transcript of the proceedings to the department. Provisions of a transcript may be waived by the department." (Minnesota Rules 6115.0221, Subp.4.D) All landowners surrounding the three affected DNR Ponds have been mailed notices of this Public Hearing and the Hearing was posted on the City's Website. The purpose of this meeting is to provide those surrounding landowners with information, receive comments from these landowners, and to address the potential impacts that may warrant further investigation before the project is commenced. SUPPORTING DOCUMENTS ATTACHED: • Public Hearing notification map • Exhibit #1 • Exhibit #2 POSSIBLE MOTION PLEASE WORD MOTION AS YOU WOULD LIKE ITTO APPEAR IN THE MINUTES: No action is required at this time. BUDGET INFORMATION FUNDING: BUDGETED: N/A 200 0 200 400 32 SCALE IN FEE EXISTING OUTLET FLOOD ELEVATION 'I 6 • 6 6 � I --z W p ROPOSED FLOOD CONTROL OUTLET O' ELEV 926.7 S PROPOSED DRAIN T LE O r -j I J I -W, Hakanson Anderson- ot�fgo TY OF NOTICE OF HEARING MAP Civil Engineers and Land Surveyors3601 Thurston Ave., Anoka, Minnesota 55303 763-427-5860 FAX 763-427-0520www.hakanson—anderson.com MINNESOTCITY OF OTSEGO, MINNESOTA SHEET 1 SHEETS nTn Z7 DNR 86-7W 2-' B -B 100-' DN R 86-302 2-' 10 100-' B -B 100-' DN R 86-8P 2-' 10-' 100-' B -B 100-' 2014 2017 POST PROJ ECT ( HWL ELEV I DISCHARGE I HWL ELEV I DISCHARGE 927.4 0 927.38 1.38 927.91 0 927.8 3.02 928.91 0 928.62 5.58 930.83 7.83 930.48 6.01 BACK TO BACK 100 -YR (14.2" IN 48 HRS I 1 1 1- C.S.A.H. 38 / 70TH STREET 100 �� 3p•� op *,0 Q o�� 3� Q 10 D � ' W Z Q - I a 200 C) W SCALE IN _....... - {� 2 < 35/942 �/// ROAD L.W POINT =926.83 ®938 /+C� yj 41 i R �yJ41 /a, -y39 7-1-71 ©943 1/936 �-/�/ 'H-940/946 ` fo p --... - -- ' 0940 1 .. ......- ---` LJ _�33 937 6,3 � 5 9,,35 � X45 pO�j►`� �930�y0 3 �J�� f�9a8 H 40/945 D% 0 � L336 0 IE- 36 L �37 30.5 �3�32 X31 30.5 H-9 2 ki7�-938 924.49 10.66 (� 929.5 �5 Fi�30 H 8 0927.5 927.32 31.8 927.33 31.54 934 2017 POST �- 34 H- 40 924.49 10.72 924.49 10.66 Gam- sz 934 X30 H� o G--932 `40 33 iP931 925.46 23.79 925.47 23.5 927.32 31.8 927.33 31.54 930.35 43.93 930.37 43.35 2017 POST 923.98 1.94 924.04 2.17 924.82 5.52 924.92 5.77 925.79 51.42 925.83 60.313349 926.91 209.06 927.04 214.93 FEET 4 2014 2017 POST P ROJ ECT (18" • �� Elevation after Elevation after D' after 1 Week Month after 1 Week Month DNR 86-7W 2 -YR 927.38 927.38 927.00 926.8 / 10 -YR 927.91 927.91 927.11 926.81 100 -YR 928.91 928.91 927.3 926.83 13-B 100 -YR 930.51 2 930.50 TT 928.57 Z 926.88 DN R 86-302 2 -YR 923.68 923.27 923.78 923.32 10 -YR 924.38 923.35 924.64 923.41 100 -YR 925.45 923.62 925.52 923.73 13-13 100 -YR 3 925.52 T924.52 3 925.60 T924-61 DN R 86-8P 2 -YR 923.67 923.27 923.77 923.32 10 -YR 924.38 923.35 924.64 923.41 100 YR 925.41 923.62 925.51 923.73 13-B 100-YRI T 925.51 4 924.52 3 925.58 T924.61 Q 2' DROP IN 1 WEEK 2Z 3.6' DROP IN 1 MONTH 3I DOWNSTREAM PONDS ROUGHLY 1" HIGHER AFTER 1 WEEK �4 DOWNSTREAM PONDS ROUGHTLY 1" HIGHER AFTER 1 MONTH