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Home My WebLink About7 - Crystal Bay Dredging Proposal AGENDA NUMBER: PREPARED BY: SUBJECT: DATE: INTRODUCTION: BACKGROUND: CENSUS '90 . 7 DAVID UNMACHT, CITY MANAGER AND BRUCE LONEY, ASSISTANT CITY ENGINEER CONSIDER ACTION ON CRYSTAL BAY DREDGING PROPOSAL JANUARY 16, 1990 The Crystal Bay Association has applied to the DNR and various other agencies for a permit to dred9'e Crystal Bay. Before a permit can be cons1dered or issued by any agency, the EAW process must be completed. On October 2, 1989, a Town Meeting on the Crystal Ba~ Dredging Application was held in the Counc11 Chambers. The City Council concurred at this meetin9' to act on this item upon submission of addit10nal information on environmental issues and on the scope of the project. The Crystal Bar Association (was required to and) has S1nce prepared an Environmental Assessment Worksheet (EAW) and submitted an Excavation and Filling Permit with the city of Prior Lake. The purpose of this Agenda item is twofold. For City council to reV1ew the findings of the EAW and decide whether the environmental impact has a negative declaration or a Environmental Impact Statement (EIS) should be performed. Also to review the Excavation and Filling Permit with the City Council for approval or disapproval. The Crystal Bay Association would like to dredge a channel approximately three-fourths around the perimeter of crystal Bay to Upper Prior Lake. The Association applied for a permit with the DNR who then requested an EAW be prepared on this project. An EAW was submitted by the Crystal Bay Association to the City of Prior Lake, which is the Responsible Government Unit (RGU) in the Environmental Quality Board (EQB) 4629 aii1k.ta S1. S.E., Pri.r Lake, Minnes_t~ 55372 / P'h. (.12) 447-4231 / Fax (612) 447-4245 EAW process. The City of Prior Lake has filed the EAW with the EQB and published the filing with the Prior Lake American on December 11 and 18, 1989. Copies of the EAW were sent to the agencies and organizations listed on the enclosed EAW Distribution List. The thirty day review period ran from December 11, 1989 to January 10, 1990. A copy of the EAW and attachments are enclosed in the Agenda packet. Comments on the EAW have been received from Scott County Highway Department, Metropolitan Council, Pheasants Forever, U.S. Environmental Protection Agency and the Department of Natural Resources. An amendment submitted by the Crystal Bay Association has been added to address the concerns raised by the Metropolitan Council. Copies of the comment letters and amendment to the EAW are enclosed for Council review. PI ease review these comments carefully. The Crystal Bay Association has submitted an Excavation and Filling Permit application, ~roposed grading plan, and supporting 1nformation for this permit. A copy of these items are enclosed for Council review of the permit. Also enclosed is a letter from steve Harvey of Valley Engineering addressing previous concerns of the October 2, 1989 meeting on this project. These previous concerns are listed as follows: 1. 2. 3. The effect of seepage from the lake dred9ing. The l.mmediate effect from the drop of the lake level by dredging. The effect on all roads due to hauling of dredged material. Supplying of the Letter of Credit and Insurance to protect public interests resulting from this project. Future impact on dredging of other bays on Prior Lake. 4. 5. DISCUSSION: The City of Prior Lake is the RGU on the Crystal Bay EAW, subsequently, we are the the sole legal determinent on who makes the decision on whether or not an EIS is required for this project. According to the rules, "the primary purpose of the EAW process is to provide the facts needed to determine if an EIS is necessary." From the Guide to the Rules of the Minnesota Environmental Review Program, an EIS shall be ordered for pro~ects that have the potential for signifl.cant 2 environmental effects. The criteria for deciding whether a ~roject has the potential for si9nificant env1ronmental effects are the followl.ng factors: CRITERIA FACTORS: 1. Type, extent and reversibi1ity of environmental effects; Cumulative potential effects of related or anticipated future projects; The extent to which environmental effects are subject to mitigation by ongoing public regulato~ authority; and The extent to wh1ch environmental effects can be anticipated and controlled as a result of other environmental studies undertaken by public agencies on the project proposer, or of EIS's previously prepared. The Council should consider the comments received on the environmental impact and review the scope of the project to determine if an EIS is warranted. The comment period is over and staff has submitted all information received on the EAW. 2. 3. 4. This Council Meeting date has been chosen to allow the Crystal Bay Association (at least on a City council level) an opportunity to complete the project this winter if a negative declaration on the EAW is determined. The Association still must obtain all permits for this project before they can begin dredging. No final governmental decision in granting a permit can be made until a negative declaration is made or an EIS is completed. staff would like to summarize the EAW comments in terms of the need for an EIS. First, the Council can determine if an EIS is required, not withstanding any comments received on the EAW. staff would advise the Council and recommend that if an EIS is required, that the decision be documented with the specific reasons or findings calling for the EIS be stated in terms of the four criteria listed above. Staff can advise the Council accordingly, if this is the action you choose to take. Second, the only agency calling for an EIS was Pheasants Forever. Their rational was due to incomplete response relating to the dredging's impact on fish, wildlife and habitat. Neither the Metropolitan councilor the DNR went on record requesting an EIS be completed. 3 The Metropolitan Council Community Development Committee has taken a position on the dred9ing and has forwarded that to the Metropol1tan Council. Dave Vinlove, Crystal Bay Association, addressed the Metropolitan Council Committee's comments with an addendum to the EAW. The full Metropolitan Council is meeting on January 11, 1990 to act on their Committee recommendations. City staff will forward their response to the Council at the meeting on January 16. In discussions with Metropolitan Council and DNR staff, they are careful to point out that their ~osition does not request an EIS, rather they s1mply have concern on the proposal and those concerns are expressed accordingly. In a conversation with DNR staff, they point out that their "no position" on an EIS essentially is saying that, in their mind, one is not required. Both the DNR and Metropolitan Council staff, in discussions with City staff, expressed a concern about whether the project would even be successful and whether or not it was a good idea. City staff believes that the issue of wetland impact in the spoils disposal site has been adequately addressed and will be further scrutinized and monitored through the Excavating and Fil1ing Permit. with regard to the Excavating and Filling Permit, staff has reviewed the pIan submittals provided by the Association and would request the following additions or changes: 1. Additional soil borings/tests taken in the proposed channel excavation area to determine if the dredging will cause a downward drainage to the lake. Previousl~ hand aU9'er borings were taken by Twin C1ty Test1ng to determine the depth of the peat deposits. Hand borings were done due to the water in the bay at that time. Now the ba~ is d~ and the ground is frozen; a sOl.l drill1ng rig can be utilized to better determine the depth of soil layers and to obtain a sample of the future channel bottom soil and test it's permeabilit~. Also most of the previous soil borl.ng locations are not located in the proposed dredging area. 4 ALTERNATIVES: The Association has asked if a letter from the DNR would suffice indicating that they are not concerned about seepage from the dredging. staff indicated that would help, but believes further, that more borings should be done to prove to the extent possible that no seepage will occur. Information on this w1ll be provided at the meeting. 2. Complete set of specifications should be submitted. Provisions should include details on clean up of haul roads and specifications allowin9 the City Engineer to stop hauling operat1ons upon detection of the pavement section weakening due to the spring thaw. 3. Letter of Credit and insurance provided to the Citr satisfactory to the City Engineer pr10r to construction. 4. Channel section by the main lake body should have, to the extent possible, 3:1 slopes and grouted riprap. Project to be Professional drawings. 6. Permits must be obtained before starting from the DNR, Prior-Lake Spring Lake Watershed District, and the Corps of Engineers. (The above agencies have the individual right to approve or deny the permit.) The possibility exists then, that the City could approve the permit and one of these agencies disapprove the permit, thus endl.ng or stalling the project. 5. inspected by Registered Engineer with as-built The alternatives for the Council on this item are as follows: 1. Adopt Resolution 90-02 and approve the Excavating and Filling Permit contingent upon satisfaction to staff of the items listed above (1-6) and any further items directed by Council. 2. Adopt Resolution 90-02, but do not approve the Excavating and Filling Permit until issues identified by Council at the meeting are reviewed and brought back to Council for further review and approval. 5 RECOMMENDATION: 3. direct issues meeting process. moot in Do not adopt Resolution 90-02 and the Association to address the identified by the Council at the before finalizin9 the EAW (Excavating and F111ing Permit this case.) 4. Do not adopt Resolution 90-02 and direct the preparation of an EIS on this proposal. 5. Table any action for further review and consideration. staff has attempted to work closely with the Crystal Bay Association to assist them in their project proposal. staff believes that we were successful in almost all instances in advancing the process for the Association. Dave Vinlove has worked extremely hard and has spent considerable time on this project. The Association has a window of time to com~lete their project which was from now unt1l sometime in early March (date contingent upon weather and thawing). Frankly, staff is unsure, even if given full Council approval of this issue on January 16, whether the Association will be able to begin this year. This is because of permits needed and other Association details required. A request should be made to Dave Vinlove to have him address his thoughts on this time frame and realistic completion expectations. staff is unsure if the Association will even start the process if when going into it they know they won't be able to finish. A realistic assessment of completing the project this winter should be ~art of the Council's deliberation and dec1sion. staff has questioned repeatedly as to what an EIS would accomplish on this project. Whether the EIS is completed or not, the issues are still the same. Staff questions whether any new, significant information would be learned from an EIS. 6 ACTION REQUIRED: staff resorts to one subtle, but relevant ~oint. The Metropolitan Council and DNR are 1nvolved constantly with EAWs and EISs. In discussions with their staff, our staff concluded that they did not believe an EIS was required. staff would look to those agencies to be integra 1 in determining whether or not an EIS is needed. In this case, staff believes an EIS isn't required. This is not to diminish their issues or concerns, rather, in order to continue the process, the Council can request that the Association address these as part of the Excavating and Filling Permit process. The Excavating and Filling Permit is generally a routine, or staff process. However, because of the ma9nitude of this proposal it is proper and legit1mate for the council to take a role in determining whether or not a permit should be issued. staff firm1~ believes that of all the issues in that Perml.t, the one that must meet the city's satisfaction is the soil boring/seepage issue. Further proof or work must be done by the Association to alleviate any concerns that the dredging will not "break the lake bottom seal". We should do our best to avoid another "Candy Cove" issue. staff believes that either Alternative 1 or 2 are acce~table. Alternative 1 requires more work subJect to staff's further review. The Council should know that, in all likelihood, Alternative 2-5 wil1 stop the project from proceeding this winter. (Alternative 2 may not stop the project if the Council is willing to have a special meeting. This is contrary to past policy, however.) If the Council determines that the issues need more study or analysis, staff can understand and will work with the Association to produce the information to allow for construction at a later time. Although contrary to the current interest of the Association, the Council may determine that this action is in the best interest of the lake and the genera 1 public. Council action will be subject to discussion and input at the meeting. 7 CENSUS '90 . RESOLUTION 90-02 A RESOLUTION FINDING THE ENVIRONMENTAL ASSESSMENT WORKSHEET FOR CRYSTAL BAY, A PRIVATE ACTION AND DOES NOT REQUIRE AN ENVIRONMENTAL IMPACT STATEMENT MOTIONED BY SECONDED BY WHEREAS, the City Council of Prior Lake on Januarr 16, 1990, considered the comments of the Un1ted States Environmental Protection Agency, Pheasants Forever, Metropolitan Council, Department of Natural Resources, and Scott County Highway Department, and WHEREAS, the comments of these agencies will be taken into account during the upcoming permitting and review process for Crystal Bay. NOW THEREFORE BE IT RESOLVED BY THE MAYOR AND CITY COUNCIL OF PRIOR LAKE, MINNESOTA, that an Environmental Impact Statement is not necessary for Crystal Bay because the project does not have significant environmental effects and is not more than of local significance. BE IT FURTHER BE RESOLVED, BY THE MAYOR AND CITY COUNCIL OF PRIOR LAKE, MINNESOTA, that a negative declaration notice shall be officially filed with the Minnesota Environmental Quality Council. Passed and adopted this th day of , 1990. YES NO Andren Fitzgerald Larson Scott White Andren Fitzgerald Larson Scott White David J. Unmacht City Manager city of Prior Lake {Seal} 4629 Dakota 51. 5.E., Prior Lake, Minnesota 55372 / Ph. (612) 447-4230 / Fax (612) 447-4245 :;.1 ,..,.. 14 _. v.:::. ,._' EA W Process RGU detmnines FA W ~ ~ ROO JI'l1BeS F1J.W ~UJAK7 suppa nec:e&ay data) ROO~EAWfa~ ROO setm PAW '> ~ list ROO i.m:s ~ reJea Nocice ~ in ~B Mooira 7 to 21 days after remp eX EA W 30 day cxmmett plDx1 (D1S at B)B Mooira pltOCam _> 30 day cxmmett plDx1 ends ROO deciJes if poject reeds EIS lIXf ~ 10 canmenlS ROO distributes oodce eX deciD1 Nori::e ~ in ~B MIIifa 7 10 21 days after remp eX dccisUl ".-,..r~.. .:"." .~..;-t .:..!"" . ,. ~ . . .:;; t. x :< ;, · f *: l i; ~. .':- ;~ ::: . :m i ji ~: :::: .' ::;: . I . I vanes 1 10 S \\Uting days 1 '> S \\Uting da>'s 7 t> 21 ca1enda- days 30 caIe:ncR days &~~""f:rn~ l&A&:$~ Omy - indic8 IClianI dIa _y _ CMI" . pcIiod <:Leima . I . I 3 wating days t> 30 days* . 1 t> S \\Uting da>'s . I 7 t> 21 caIe:ncR days ~LL *ca1 vary depending 00 ROO PRlORLAKE AMERJCANJDecember.1. 1.' . EAW filed on Crystal Bay, dredging project The City of Pria' ~ke has filed an Environmental Ass/:,ss- ment Worksheet (EA W) with the ElrrirootnCtUal . Qualit1 Board fOr' the dredging of CryStal Bay. i The crOOoScd' JKOject 000- aiatJ d the M:dgini of approxti. ~ . metcly ':45.000~ .,erds '"Of J materfIl.lonf~jJOO'~.~ of ~ IhorIliDI wJlhii ~. ae" \ ~. . rli" m'. .islQ . . 001- . 1 . bo8\Jo" ~ : bey. Tbc . area is \ aPlX!lximately fi~ acres. The material will be , b8u~~--lOIlocnh of Road 82 in Prier Lake. PcnnilJ arc.~DdiD& for the ape ~ on fhe mini site !lC1ected. . COpies of the (A W .-e avaiI- -' able 'in tbe office of the City Mana:E; 8 a.m. to 4:30 p.m..' . Y thrQugh Friday. The l,~- period runs .~ from~l .'11. .. . . ..:...;" , . this '~A:~CUY : / 11/16/87 MINNESOTA ENVIRONMENTAL QUALITY BOARD ENVIRONMENTAL REVIEW PROGRAM EAW DISTRIBUTION LIST Approximately 25 copies are needed for distribution. For further information regarding this list, contact EQB (metro: 612-296-8253; non-metro: 1-800-652-9747). BOARD OF W~TER AND SOIL RESOUReES Jim 8irXholz 90 West Plato Boulevard st. Paul, MN 55107 (1 copy) HISTORICAL SOCIETY State Historic Preservation Off. Fort Sne11ing History Center st. Paul, MN 55111 (1 copy) LEGISLATIVE REFERENCE LIBRARY Zona DeWitt 645 State Office Building st. Paul, MN 55155 (2 copies) ENVIRONMENTAL CONSERVATION LIBRARY 300 Nicollet MaIl Minneapolis, MN 55401 (2 copies) U.S. ARMY CORPS OF ENGINEERS Ben Wopat, Chief Regulatory Functions Branch 1135 U.S. P.O. & CUstom House st. Paul, MN 55101-1479 (1 copy) U.S. ENVIRONMENTAL PROTECTION AGENCY William D. Frand Chief of Environmental Review Br. 230 South Dearborn Street Chicago, IL 60604 (1 copy) U.S. FISH AND WILDLIFE SERVICE st. Paul Field Office 50 Park Square Court 400 Sibley Street St. Paul, MN 55101 (1 copy) METROPOLITAN COUNCIL (Metro area only) John Ruttord, Referral Coord. 300 Metro Square Building 7th and Robert Streets st. Paul, MN 55101 (1 copy) ALSO DISTRIBUTE COPIES TO: NOTE: ENVIRONMENTAL QUALITY BOARD Environmental Review Program 300 Centennial Office Building 658 Cedar Street St. Paul, MN 55155 (1 copy) DEPARTMENT OF PUBLIC SERVICE Dennis Devereaux 900 American Center Building 150 East Kellogg Boulevard st. Paul, MN 55101 (1 copy) NATURAL RESOURCES Don Buckhout Office of Planning 500 Lafayette Road, Box 10 St. Paul, MN 55155 (3 copies) POLLUTION CONTROL AGENCY Cliff Anderson 520 Lafayette Road St. Paul, MN 55155 (3 copies) TRANSPORTATION Cheryl Heide Room 704, Transportation Bldg. John Ireland Boulevard St. Paul, MN 55155 (3 copies) HEALTH Laura Oatman State Health Building 717 Delaware Street SE Minneapolis, MN 55440 (1 copy) AGRICULTURE Paul .Burns 90 West Plato Boulevard st. Paul, MN 55107 (1 copy) ,. -M~~f;;.~ - ~L >L. jt/db~/ ~_ Proposer of the project Local government unit within which the project will take place Rcqienal DQYelnpmeRt Cemmi33ieR, where applicable, and R~9inn~l Development' Library for the~~~igR of the projeet site (Eee accOmpanying lists and map) - Representative of any petitioners pursuant to 6 MCAR 3.026 - Any other person upon written request PRESS RELEASE A press release must be provided to at least one newspaper of general circulation in the project area within 5 working days of RAW distribution. release must include the name, location, and a brief description ot the proje the location(s) at which EAWs can be reviewed; the comment period deadline (calI EQB if unknown); and to whom to submit comments. 5/1/84 E.R. · (Riled In by EQB) ~ Environmental Assessment Worksheet (EAW) MARKAPPROPR~TEBO~ [9 REGULAR EAW o SCOPING EAW NOTE 10 REVIEWERS: For regular EAWs. written comments should address the accuracy and completeness of the EAW information. potential impacts that may warrant investigation and 1 or the need for an EIS. For $Coping EAWs. written com- ments should address the accuracy and completeness of the information and suggest Issues for investigation in the EIS. Such comments must be submitted to the Responsible Government Unit (RGU) during the 30-day period following notice of the EAWs availability in the EQB Monitor. Contact the EQB (metro: 612/296-8253: non-metro: 1-800-652.9747. ask for envi- ronmental review program) or the RGU to find out when the 30.day comment period ends. 1. 2. Project Name Crystal Bay I'redging Proposal Proposer r;rJrC!t~l 1:l.~y A~C!n(';~t;nn 3. Contact Person Dave Vinlove RGU ~;ty o~ Prior T~kp Contact Person Dave Unma.cht Address l5738 Island View Roan Prior Lake, ~~T 55372 612-440-6440 Home 612-870-2743 Work N . Vi . and Title Ci ty Manager Address 4629 Dakota street ~ ~ ~. ....... Phone Prior Lake, MN 55372 Phone 612-447-4230 4. Project Location: S. . E _\ I " 1:;' I 4 '.' ..LJ' 1 14 Section l15N 22T'1 Township Range' Prior Lake City/Township Name 34 a. County Name scott b. Auad'l copies of each of the following to the EAW: A ttached and numbe red af: shown. 1. a county map showing the general area ofthe project. 2. a copy(ies) of USGS 7112 minute. 1 :24.000 scale map. 3. a site plan showing the location of significant features such as proposed structures. roads. extent of flood plain. wetlands. wells. etc. 4. an existing land use map and a zoning map of the immediate area. if available. 5. Describe the proposed project completely (attach additional sheets as necessary). For the pa~t two years of 1988 and 1989 Crystal Bay has had no w~ter. Neither fish habitat existe~ nor boat navigation in the b8Y was po~sible. The entire bay was surveyed and its elevation pre~ently averqges 897.1 feet lfSL. Soil samples were taken down to ~ l2' nepth and material is fibric peat to that level. Frior L~ke presently has a water level of about 896 feet ~~L. The project requests approval to dredge a channel. 68' wide, around 3/4 of crystal Bay. APproximately 145,000 cu. yards of material would be mechanically dred~ed. The material woulr be trucked about 1/4 mile north (across Scott county Road #82) to Cl. residential development project and used as fill. The entire cost of the project is to be :C~de4,~ by the bay home- owners and developer. completion'of the project would allow return of fish to the bay channel, create boating access to Prior Lake for the llO home- o\vners liv.ing on and around the bay, and increase their property valuations. In addition, recreational opportunities would improve~ for u~ers of Prior Lake. . . 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. Ruson for EAW preparation: ~Pq uP.!=;t hy M; nn~c::n+~ D~I't of N~ tll'r'~ 1 Pec::oll'r'C'es. list all mandatory category rule a'swhich apply: MN Rules. Part 4410.4100. ~ubpart 27. Estimated construction cost _ $125, 000 Total project area (acr") Apnrox. C; a.crAl'! or length (miles) Number of residential units N A or commercial, industrial. or institutional square footage NA Number of proposed parking spaces list all known local, state and federal permits/ approvals/funding required: level of Government Type of Application Status Federal: V.s. Army Disposal Permit Pending Corp of Eng. State: MN DNR Drectging Permit Pending local: Prior Lake/Spring Lake DredgingPermi t . Pendi.ng Watershed District City of Prior Lake Excavating/Fillin~ Permit Is the proposeaproject inconsistent with the local adopted comprehensiviland use plan or any other adopted plans? If yes, explain: 'D d' .L en .lng Ej No 0 Ves Describe current and recent past land use and development on and near the site. Land ~dj8cent to Crystal Bay has been developed consi~tent with the comprehensive land use plan which indicates low density residential use for this particular land area. The majority of the Crystal Bay shoreline has been subdivided since 1976 and i~ fully developen with single family homes. Two out1Qts;IQcated_ in Island View lst and 5th additions are currently used as semi- public open space. The (2) subdivisions contain homeowners associatio Approximately how many acres of the site are in each of the following categories? that US e thes e outlot (Acreages should add up to total project area before and after construction.) for lake oriented re- creational use. 8efore Before C; After C; After Forest/Wooded Cropland Brush / grassland Wetland (types 3-8) Impervious Surface Other (specify) Describe the soils on the site. giving the SCS soil classification types. if known. Material to be ~redged is fibric peat. See attached Twin City Testing report of January ll, 1989, on soil borings. Also reference attached soil test results contained Testing/University of Minnesota report #01571. Does the site contain peat soils. highly erodible soils. steep slopes. sinkholes. shallow limestone formations. abandoned wells. or any geologic hazards? If yes. show on site map and explain: in Twin City ~ No 0 Ves What Is the approx;-nate depth (in feet) to: a. groundwater ~in. --1...-avg. b. bedrock~min.4.QQ...avg. 2 18. . .. " 19. .. . " . " . - .... .' ~ Don any part ollhe project arealftvolvc: ;. ' . : " . a. shoreland zoning dlstrlct? .' , ~ . <" , ~"1: '. b. delineated lOO'year 1I00d plain? c. state or federally designated river land use district? If yes, Identify water body and applicable state c1asslflcatlon(s), and describe measures to protect water and related land resources: Water body is Prior Lake. General development waters. Bay is presently dry, dredging will allow return of water. Project is consistent with the 'flood plain management program. Describe any physl~al alteration (e.g.. dikes. excavation. 811. stream diversion) of any drainage system. lake. stream. and/or wetland. Describe measures to minimize 1m. palrment of the water-related resources. Estimate quantity of material to be dredged and Indicate where spoils will be deposited. .- '".. ~"\.f-'. -'~.~.......,\' . .~ i.-~j : l!1 No fJ Yes - o. ~..~:- ,,_" ~,/ Dredging will be done as described in (5) above. Since bay is dry, mechanical dredging will be done with backhoes. Contractor to be sensitive to bay environment and undredged areas. About 45,000 cu yards will be dredged. Disposal sites per attachment. 20. a. Will the project require an appropriation of ground or surface water? If yes. explain (Indicate quantity and source): 21. 22. 23. ~ No 0 Yes b. Will the project affect groundwater levels In any wells (on or off the site)? If yes. ex- plain: Ii] No 0 Yes Describe the erosion and sedimentation control measures to be used during and after construction of the project. Project to be done in winter months of January, February, and March of 1990.in order to minimize need for such control measures. The actual dredging will be done outward from the shoreline and within designated areas only. The control measures here are being addressed and will be part of the city of Prior Lake excavating and filling permit applicati a. Will the project generate: 1. surface and stormwater runoff? 2. sanitary wastewater? 3. Industrial wastewater? 4. cooling water (contact and noncontact)? If yes, Identify sources, volumes. quality (If other than normal domestic sewagel. and treatment methods. Give the basis or methodology of estimates. ~~ ~ Yes Yes Yes Yes b. Identify receiving waters. including groundwater. and evaluate the impacts of the discharges listed above. If discharges to groundwater are anticipated. provide per- colation/permeability and other hydrogeological test data. if available. NA Will the project generate (either during or after construction): a. air pollution? b. dust? c. noise? d. odors? If yes. explain. Including as appropriate: distances to sensitive land uses; expected lev- els and duration of noise; types and quantities of air pollutants from stacks. mobile sources. and fugitive emissions (dust); odor sources; and mitigative measures for any Impacts. Give the basis or methodology of estimates. The trucks hauling dredged material will ~enerate some dust and noise. Haulage ~istances are very short, about 1/4 mile (see disposal site plan). Since the .project will be in winter monthE, the imp~ct of du~t Elnd noi~e ...-ill be minimal. The arl jacent re~idenceE ~re occtr'Oie(~ ~:J- ~r;r.t~l ~2,yAssociation members. The project duration is about- 3 (3) weeks, during d.aylight hours o:-lly. ~~ ~ Yes Yes Yes Yes , 24. Describe the type and amount of solid and/or hazardous waste including sludges and ashes that will be generated and the method and location of disposal: 25. None of these will be generateu. Will the project alleet: I ~ a. IIsh or wildlife habitat, or movement of animals? 0 No L:J Yes b. any native species that are officially listed as state endangered, threatened, or of x-1 0 special concern (animals and/or plants)? LJ No Yes II ves. e~pl~n (Identlry species and describe impact): 8 () aryq~~~ 31Y ~~S had no wa~er in either 19 G or 1989. Dredging to S?~ jiG:' will :illo':/ return of fish to the channel portion. 1:18. te!' 1~ve~2 -:;bove C?7' [IISL will all.y.! the return of fish to the entire O?y. 2 6. Do any historical, archaeological or architectural resources exist on or near the project site? If yes, explain (show resources on a site map and describe impact): 27. 28. 29. [J No D Yes Will the project cause the impairment or destruction 01: a. designated park or recreation areas? b. prime or unique farmlands? c. ecologically sensitive areas? d. scenic views and vistas? e. other unique resources (speciry)? If yes, explain: I~ ~ Yes Yes Yes Yes Yes For each affected road indicate the current average daily traffic (ADT), increase in ADT contributed by the project and the directional distributions of traffic. ?ro.(Wnt AV9n'.le - :.p rt}:, '~_).l:")~: .1/8 mile, ADT 889 plus ll2 '?:': ~J:o_ls 1 Y'}. . ~'~J':"+ ''''O'l''+'' :J.-'J"; - 7-1"'+ o;~'-,-~-"1/8 mJ.'le ADT 95!J .....111!'" l_l_? ....; .J'""" .n......'" ,t~. ~..;.)~, .~.J__ )_... , _ ~ ~_ ;:C1 ~_;.2.1? 1 () t.:' . Ndt~: Ji~~os~: ~i+?~ ~r~ J~~ tnorth of Scott ~ty Are adequate utilities and public services now available to service the project? If not, what additional utilities and! or services will be required? incr~::l,?,:- inc!'-=,,;'1 E= = #82 and Cryst~l B~y: o No ~ Yes H,"'.ll~~ to 'be ('!one '.:he:--. '~-- 2:~.-e frozen. Summary of Issues For regular EAWs,list the issues as identified by "yes" answers above. Discuss alternatives and mitigative measures for these issues, For ~oping EAWs, list known issues, alternatives, and mitigative measures to be addressed in EIS. Item Iba and b a - Land use and zoning ffiClpS r:!re pl.~oJvide-~. :19.:11 c.::'~J:L"1t; \~i-Jst,:'.l 3-'~;" :1.':- ~~~~1~~veloped according to the city o~ P~ior L~ka co~~rehen~ive l:>.n" UE' ~l "'1.:"1, b - Pro ject is consi~tent "..i th t~e 1'1:)0:: plain management or1inance. Item :J'b '";n~ c Th~ envi:-ol'1!llnnt;ll iiTl?~ct of dus-t al'1.d no.:.s~ will be minill'1ize0. as the project '.\'ill be done ,1uring ',d~"1t2r m-J:'1t~13. :{=.l.ll,~-€:> roads are hard surface,'l. Actu;=.l r. r~'1gine in tiv~ ":Jay =.n:: ~1.=.ul2.ge to be done only in daylight h01.,:r::. T'" 2 " _ "em <2. !:>redgJ.ng of the p~o;/osed c;n:Ul,:,l ':ill ,:_ll.)"~: r~';ur~~ of water and fish to Cryst:=tl 3qy. T!''1ns~er o:~ sur:'ace '-!ate~ Iron Prior Lake would be approx. 3/4 inches of depth. CERTIFICATION BY RESPONSIBLE GOVERNMENTAL UNIT Signature TIde that the information contained in this document is true and complete to the best of my knowledge and that mplet EAW have been made available to all points on the official EQB distribution list. Date !)ec~.H;1b'1r 2, 1)3) 4 ;!. -';~.r ~'i"~r.; ~:~, Prior Lake ov ~~1( No~\\\€\l.w CSc.oTT ~~\'1 I rc~ Lf. J".1 7 S ~ r i I I L .. -- f(t ............~ .:.u. ~ ..-otII (' I I I I '-_1 Prior Lake ---\ · --- ... O\~~~"L. S'T~ ~ ~. 5 S ~- i i .1 i I I ... ! '\, . ': \. : ...~ .) ..--' ...... . I I 6 S 3! - .~ ;J'."_ -.. ~ 8 S ! --- - . ..,~ 9 S \ ,J , I \ I I /J (, /{ At' i ,. ... ........ r I I . I , , _r-, - ir . 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'~I.4.,1"~7" i '.1 I I I I I 1 , 1 :...o."r" , 1 1 I I I "!'tj~ ~ . - . ~ " ~. . f- 11 ' +" " '.. ~ , t 'ro. -~ ~~ ,<,:. j, ':4.', ''':.1' I' ~Ft~t...", ~1.0j';:7'- :~~ ' ! ,~'.;: :",:. .. . ...~...:".,. , ORDERlY ANNl:)(AT~)N ^,IrA ,..,I.. 1-- .:~. i ':#, ,It rt .! ~... J!' -- , f ....1: ..... I : .":t.. 1 . t,. .... ".J \ ...11 ~..' ., './~5.i , . L: " " " " " " , ---------------------~ 1 1 1 1 1 1 1 11..1 I " '" 1'" .' __~--r..~.--...~-...--.-.~..-i..-..-.-.--.~-..i. r . ' \'.~'.. . I',PUD 4-,83 .." \ . .' \ - .'.. .- .' ':- .,. I _______~ I. ;- _.;' r......1' I, I, 1 'f-~," ')1.' -:J 1 1 I"..' (-- 1 . _._J 1 I' t . PUD 1 C ,.,# ..'." I "I 1 """,""" :," 1 ".1., ..~ "'9 Sr-82 t.______........... .-1- , ---.,' \ . ..~--.....lillloC.1 i I .-. " . lilt, , R IR'1 /' .... II S' 0 ,,' ,..f...:;;.;// ~-=--)"f ..." \ "AU , / ,....;'.., ,-, ~.~~L:.;~~...., I ;. ,/? y t," I,\.. .'~/ ~ ,.1' N ~ I r. CITY flf PHIOR LAKE ZONING MAP -~ ," I ,_. i i \ I I ~RlY '/lNNEXAUON AREA 198H :i I \01: ..... _.f PUO",'" '\r,:?y ,./'"'''' / ~;] \ - ,'\ ,f I " " ,./,......... \t~~f~~ '18-0 ' : ~ ," ,..) " ,,00. ,.'" . L.--" . ~ " .. / - ~/-../ .:<"j. 'I' , ~"~~1 :'t .,~.~...... ~I' 1_:'" " .'.t...............~I4.~ R-1 ~...~~;'.;;l.J.'. . . ,~f' '-" . R-2 ~::RE~' '~~ R-3 ~~ RESI)ENl1AL '~t.' R-4 ,"'XED CODE RESlOENTIAL B-1 LMTED ElUSI'ESS B-2 CQMt.UITY BUSINESS B-3 GENERAL BI.JSlIIESS 1-1 SPECIAL NlUSTRIAL 1-2 UGHT IN)USTRIAL A-1 AGRICll.TUW. C-1 CONSERVATION PUD~ lHT DEVELOPMENT S-D SHORELAND DISTRICT I" " . ~ . AMENDMENTS _.....t ...,.... ....... ~,... OM.... ..,~ ... "41 ,........ .. If'" .......... .. If'" MM' CIIID If." ....., ,~ 4-.'0.4 ao~3 fjV \~~.." u- po ~M Q.d ~ ..0' m .' ~r U- ~ 0 rO - --.- :.. ..r . S allll Do ilili~ ~ Ihlti~1 ~nn ~ ~ 1 ..J !I(I'II I:! I~I :gf I ~I I~i III :Ie C ~ ;... - -- -.... ... a: Q a: A. ...... (" .<.:......_:..~.: : ,. ~ " \' '. r f... '- i_"='''Q:''_~;!_'' "....... ..~::.;.:..:{<':'l ...).......;o:;..~ j~;i~ I I~t?;r~~i~ _ ~4 ~.._- . ....--. """"- _. _ __-4._ LlJ .--.... ...~ .- ..' -, '1__ ,~_ L l - - ~ J ot=-~ ~ tWin city testlnQ corporation January 11, 1989 2no COMMERCE Sf. LA CROSSE. WI 54603-1705 PHONE 6081781.5330 Crystal Cove Association 15738 Islandview Road Prior lake, MN 55392 Attn: Mr In.1g v:inc:ove SUbj : Hard Auger Borin;J ~LCUD Crystal Cove Prior lake, Minnesota #4220 89-541 Dear Mr V:incove: In accordance with a verbal request fran Mr steve Harvey of Valley Engi.neerin3, we have conple~ eleven harxi auger borin;s within Crystal Cove. '!be borings were exten:led to a depth of 12' where swanp deposits 'Were enc::amte.red or were terminated at a shallower depth where carpetent soils 'Were enc::amte.red. '!be borirq locations were sm:veyed arrl staked by Valley Engineerin3. '!he borinJ locations are indicated on the attached sketch. SUrface elevations at the borin; locations were obtained iran the sketch SUWlied to us. Eight of the eleven borin3s terminated at 12' within the fibric peat. Borin;J H~ tenninated in 1/2' of sardy lean clay with a little gravel at a depth of 6 1/2'. Borin;J I-2, was terminated in l' of sarrly lean clay with a little gravel at 9'. Borin;J B-6 was terminated in 1/2' of san:l at a depth of 9'. '!be borirqs were carp1eted with a In hard au:Jer after augerin;J 1:lu't:ugh the ice with an ice auger. Since di..sturbed sanples ~ retrieved below the water table, the classificatian of the soils arrl the depth of the varialS soil layers are approximate. We are sencliIg ycu urxler separate cover a sanple of the fibric peat. 'Ihis will assist you in evaluation the various means available to reDrNe this material. If you have ~ questions regarcli.nJ this report or need ~ additiaal infonnatioo please contact me at 641-9397. Very truly yours, ~:!l.~ Principal Engineer DmjJank AN EOUAl OPPORTVNIlY EMPlOYEA · \~ ,S'~ ~~~ d ~f~ ~ a .... ~ I !I ;: I J. i 8 ... ~ 2 --:::3Z- .). I I ~ ~I .. ~ ... e; ~~ !is a Q; "" ~ ~ ~ IQ &l; ~ a ..... ~ ..... ~ .... ..... C'f ..... ~ -- ~ .... C'f () ... cq ~ ~ IIQ ... u I:q .... "" i II ~ . . . . \~ \r;-G -~..-...~-- ~ Q!t~ I C~~ SOIL TEST REPORT UNIVERSITY OF MINNESOTA SOIL TESTING LABORATORY Soli Science ~...... Horticultura' Science Department Agricultura' Extension Service Agriculturll' Experiment Station Cooperatln. TWIN CITY TESTING 662 CROMWEll AVE. sT. PAUL. HN. 5511't \ Report NO: 01511 . bboratory NO: 03494 Date Received: 10/06/89 Date Reported: 10/09/89 Soil Test Results fOR: lCREN BRAUN Sample Soil Buffer Organic P K Soluble Soil Phosphorus Potassium Salts Designation Texture pH Index Matter (Ib/A) (Ib/A) (mmhos) 518 PEAT 1.0 VERY 13 It4 0.9 HIGH INTERPRETATION OF SOil TESTS Soil Nutrient Levels: low Medium High pH. . . . . . . . . . . . . Phosphorus (P) . .. .. Potassium {K)...... Soluble Salts. . . . . .. RECOMMENDATIONS FOR: NEW SEEDING OR SODDING lIHE RECOMMENDATION: NONE RECOMMENDED THE A~OUNT Of EACH PLANT NUTRIENT TO APPLY: - NITROGEN eNJ + PHOSPHATE (P20SJ + POTASH CK20J --- . -- 3.50 LaS/IOaO SQ.fT. + 5.00 LBS/I000 SQ.FT. + 5.00 LaS/1000 SQ.FT. APPLY A fERTILIZER THAT SUPPLIES THE RECOMMENDED AMOUNTS OF PHOSPHATE AND PClASH. THIS fERTILIZER SHOULD BE TIllED INTO THE TOP ~6 INCHES OF SOIL DURING PREPARATIGN PRIOR TOSEEDING OR SODDING. THIS fERTILIZER WIll ACCOHODATE THE PHOSPHORUS AND PGTASSIUM NEEDS FOR SEVERAL YEARS. --- CAUTION: ABOVE NITROGEN RECOMMENDATION IS FOR THE ENTIRE SEASON. APPLY NITROGEN FERTILIZER AS FOllOWS: 0.5 l8 N/IOCO SQ.FT. SHGUlD dE RAKED INTO THE SURfACE . PRICR TO SEEOING OR SODDING. THEN APPLY AN ADDITIONAL 1 La N/IOOO SQ.FT. AT ~)RST HOWING. REPEAT THIS APPLICATION AGAIN ABOUT AUG 10 AND AGAIN BET~EEN OCT Ie AND t\c~ 15. APPLY A fERTILIZER THAT SUPPLIES THE RECOMMENDED AHOUNTS OF PLANT ~UTRIEN'S. THE SGLU81E SALTS TEST INDICATES: NO SALT PReBlEM EXISTS. II t:.~ I~ \:) ~\"\; oC~ '1 CRYSTAL BAY SOIL ANALYSIS FOR TOPSOIL USE PRIOR LAKE, MINNESOTA MnDOT SPEC. ARTICLE 3877.2 #4220 90- 518 SELECT SAMPLE TOPSOIL BORROW TOPSOIL BORROW MATERIAL PASSING #200 SIEVE CLAY SILT SAND & GRAVEL ORGANIC MATERIAL pH EXTRACTIBLE PHOSPHOROUS EXCHANGABLE POTASSIUM SOLUBLE SALTS 76.4% 33.8% 42.8% 23.6% 50% + 7.0 13 LBS/ACRE 44 LBS/ACRE .9 MMHO 85-100% 5-30% 10-70% 10-70% 3-20% 6.1-7.8 90-100% 5-30% 10-70% 20-70% 3-20% 6.1-7.5 30 LBS/ ACRE MIN. 150 LBS/ ACRE MIN. 1. 5 Mho MAXIMUM NOTES: MATERIAL IS SLIGHTLY LOW IN CLAY CONTENT. MATERIAL IS HIGH IN ORGANIC CONTENT. FOR SELECT TOPSOIL, ADDITIONAL PHOSPHOROUS AND POTASSIUM WOULD BE REQUIRED. , I 1::.'''' I ~ \:) \'9\6-~ ~~ 'i GRAIN SIZE DISTRIBUTION TEST REPORT l "l~"jjj 100 ge - - - ! - ~ s: ~ . I I .. ... .. - I :: E , T "" r--. , , ~ , ; : \.. : : \' : : : : , : : , ~ : : : : ~ : : : : : : , , ! \ ; : , , . : , : : : : : : .-. : -." , : : : : : : : : : : , : : : : : I : : : : : , I 80 '7e ffi 6e z - LL I- :5e ffi ffi 4e 0.. 3e 20 10 o 2ee lee le.e 1. €I e.l GRAIN SIZE - mm e.el 0.001 ~st %+'7~_ o 1 0.0 % GRAVEL 0.0 % SAND 23.6 % SILT 42.6 % CLAY 33.8 LL PI Des 0.12 Il6e Dse e.01 D3e D1S Die Cc Cu o MATERIAL DESCRIPTION USCS PT AASHTO o SAPRIC PEAT Proj.ct Ho.: 4220 90-518 Project: CRYSTAL BAY - TOPSOIL BORROW o Location: PRIOR LAKE, MN R.ma.rks: From a Bag Sample Dat.: 10-1'7-89 GRAIN SIZE DISTRIBUTION TEST REPORT TWIN CITY TESTING CORPORATION Figure No. lnlf' \~~ ~~ '" C)'f"'\ . ===r=========================================================================== Test No.: 1 GRAIN SIZE DISTRIBUTION TEST DATA ------------------------------------------------------------------------------- Date: Project No.: Project: 10-17-89 4220 90-518 CRYSTAL BAY - TOPSOIL BORROW ==============~================================================================ -------------------------------------------------------------------------------- Sample Data -------------------------------------------------------------------------------- Location of Sample: Sample Description: uses Class: AASHTO CIClss: PRIOR LAKE, MN SAF'RIC PEAT PT Liquid limit: Plasticity index: -------------------------------------------------------------------------------- Notes Remarks: From a Bag Sample --------------------------------------------------------------------------------- Fig. No.: -------------------.---------.------------------------------------------------------ Mechanical Analysis Data -----------.--------------------------------------------------------------------- Sieve # 10 # 40 # 100 # 200 Si=e~ mm 2. (\0;) 0.420 n.149 0-074 F'er=e" t finer 100.0 99.3 89.3 76.4 -------------------------------------------------------------------------------- Hydrometer Analysis Data -----------------.--------------------------------------------------------------- Size!, mm 0.0225 0.0160 0.0115 0.0024 Percent finer 72.3 6~1. 6 5~.::: 32.1 ---------------.-------------------------------------------------------------------- Fractional Components Z + 3 in. = 0.0 Z SILT = 42.6 ------------------------------------------------------------------------------- % SAND = 23.6 I. GRAVEL = I. CLAY = 33.8 D85= 0.12 D60= 0.014 D50= 0.011 0.0 ..<c,' tD . .0 .. " I:) :,....o,? PARCEL ~ 0) ~'.,~ . 6.426 AC~- - . 1'\ I \ , . \. ~ 4 · :~4c?"? . -':"Or, )_/ ~ I ",:,., \ '. \\~. ~~\ :' ~. to \., I .... ~ 0" .... lbo, ~, ,-f. . ... 559.16 Ol~~~~,- c; \\"E I I\~m \~ , 11)' ~; I'f'l; ~l : 0 PARCEL C "'0 o. -'1 . ... .. . r-1Il " . ~ , 011'I . 6.428 Ac.. e_ : . z: 0 ~ PA R eEL 6.426~C. )~\ ~ en fIi ' UJ, 'd ... ~.\ " \ ...J \ \ "(;.,, . "" i. ~ Y1 'l- "%'":i~' ~. 't,'":i S. 6'. !l1:!"IS-E. ~'7S.09 I I I ~. .;JI'~ - .... .0 It) 1.010 z'j: I ' j 7.009 Ac. 315 L I i PA RC E L A ~ ..: ~16.346 At. ,., ~ . I . ~ . . .\1) . N ~'r- -0 ,... .,,- l'- i. . , . PARCEL H 6. &68 Ac. PARCEL G - --;-------- :0 ; ROAD . lOa 315.09 S. lin.. Qf the H.E. 1/4 154T.t1 _ .4., .__ __ I ~ o ~"c.,,-A'- ~'i f~( ov '~I~I $~ E ""326.18'" N,89' U'S7- E S. I il\& or the ".E, I N.87'4044"E. ...1415.28.... , ~. .UJ :~ Z rtl,! 0_ ~~'O ... . "'0'" , ...... : %- ~ iii . J: - I., o " c: LIJ ,.. -~ rR- 214.53 .-" . . "'''.'lA...... , w' ~_ _. .,.. lL'" 38.!J TRAIL , 193.91 '... S. 89. 50' I 5 .. E. S T R E E T OR. '5 ~ \"", ~~.,-y t!:. ~ ~ o l~~o~...\.. S\~ l:)~ '\"',\- ~ f~\\~E~ ~EC,"\()", "'e~'to(s\,\\~ e F 3Li , \~N 5Y 'I~ IV 2 -'126.00" ,- ~~ t'4(,. e' D) s.,~~'- ~TY. ~l'SOO G\\Yo \ ~)~ (,,~ Yo 4~, c ~a '0 ~L d:l'" ~~w ,J';NUARY 9. 1990 DRAFT SCOTT COUNTY HIGHWAY DEPT. RESPONSE TO CRYSTAL BAY EAW, DATED DECEMBER 12,1990 SPRING LOAD RESTRICTIONS. IF EFFECTIVE DURING THE DREDGING PROJECT, WILL BE OBSERVED 8Y THE CONTRACTOR, 8&C EXCAVATING. THE CONTRACTON WILL REMOVE ANY DE8RIS FROM COUNTY HIGHWAY **82 ON A DAILY 8ASIS TO ENSURE SAFETY AND CLEANLINESS. THANKS FOR YOUR COMMENTS. ~~ \j~ GGp.. SCOTT COUNTY HIGHWAY DEPARTMENT 600 COUNTRY TRAIL EAST JORDAN, MN 55352.9339 (812) 496-8348 ~ 't/tH &tie . .'1 f.~ - ;'~vJ /l~ _ fic/ BRADLEY J. LARSON Highway Engineer DANIEL M. JOBE Aut. Highway Engineer DON D. PAULSON Asst. Highway Engineer December 12, 1989 Rt....- '".... DFr 1 .. fI",4,J ~1J' - t9ag .~~ David J. Unmacht, Manager City of Prior Lake 4629 Dakota Street SE P.O. Box 359 Prior Lake, MN 55372 Re: Environmental Assessment Worksheet (EAW) Crystal Bay Dredging Proposal Dear Mr. Unmacht: Scott County Highway Department has reviewed the above . referenced EAW as it relates to the County Highway system and offers the following comments: * The bituminous paving of County Road No. 82 will not be completed until the 1990 construction season. This will necessitate spring loading restrictions of 7 tons per axle. Spring loading restrictions, dependent on weather conditions, usual1y take effect in late February or early March. * Contractor should provide appropriate measures to prevent tracking onto the County highway. Thank you for the opportunity to comment on the EAW. If you have any questions or would like any further information, please contact this office. BJL/kmq cc: Joe Ries, County Administrator All EqU41 Opportunity Employw JANUARY 9.1990 DRAFT PHEASANTS FOREVER COMMENTS ON CRYSTAL BAY EAW. DATED 12/30/89 THE QUESTION #25 OF THE CRYSTAL BAY EAW THAT IS REFERRED TO HERE WAS ANSWERED IN THE POSITIVE. HOWEVER. A STATEMENT WAS SHOWN REGARDIND FISH HABITAT. SINCE NO WATER IS PRESENT IN THE BAY. THE DREDGING OF A CHANNEL WOULD PERMIT FISH TO RETURN. NO EFFECT ON OTHER TYPES OF WILDLIFE IS FORESEEN WITHIN THE SCOPE OF THIS PROJECT. THANKS FOR YOUR COMMENTS. @ OF SCOTT COUNTY 110 REBECCA DRIVE JORDAN. MN SS3S2 612/492-2486 December 30, 1989 Mr. David Unmacht City-Man~r Prior Lake, MN. Dear David, As President of the Scott County Chapter of Pheasants Forever, I have reviewed the EA\i for the Cry etal :Bay Dredging Proposal. I find the EA\i incomplete in several areas and ask the Regulating Governmental Unit suspend its deliberations on this issue until an Evniromental Impact Statement can be prepared. Specifically I refer to question 25 which states that fish, wildlife habi tat and movement of animals \iILL be affected. The worksheet states that if the question is answered yes, a statement must be included stating the species and impact. No statement was made with respect to habitat or movement of animals. Accordingly, the EA\i appears del inquent in this respect and these questions must be addressed. It is entirely possible that the person preparing the EA\i was not qualified to comment on -habitat or movement of animals". Therefore, we believe it appropriate to request the RGO to provid~ and EIS before proceeding with its deliberations of this subject. Pheasants Forever DEMjrm 'vJ ~. q() f" :7 dOl1 .JHNUARY 9, 1990 DRAFT UN I TED STATES EPA LETTER OF JAN 2-RESPONSE TO CRYSTAL BA'{ EAI;.J THESE COMMENTS ARE ONLY ADVISORY, BUT WE SHOULD ACKNOWLEDGE THEM. REFERENCE I S MADE TO THE SOURCE OF THE !"tATER I AL TO BE DREDGED. AS THE TWIN CITY TEST REPORT STATES, THE MATERIAL IS BASICALLY "FIBRIC PEAT". THE BAY SHORE DOES NOT SHOW SIGNS OF EROSION. REMOVAL OF THIS MATERIAL WILL ALLOW THE RESIDENTS ACCESS TO THE MAIN BODY OF PRIOR LAKE. "NO WAKE" MEASURES WILL BE ENACTED TO PREVENT ANY EROSION OF BACK-FILLING OF THE CHANNEL. THANKS FOR YOUR COMMENTS. J)~ \J ~ (/0~ ~1tO sr<4l't .j IS' ;-fti \~} 1"", ...+' "04( PR01t.(, UNITED STATES ENVIRONMENTAL PROTECTION AGENCY REGION IS 230 SOUTH DEARBORN ST. CHICAGO, ILUNOIS 80604 REPlY TO ATTENTION OF: - 2 JAN 1989 Mr. Lave Vinlore 15738 Islam view Minnesota Prior Lake, Minnesota 55312 Dear Mr. Vinlore: We have catpleted aIr review of the Regular Environmental Assessment Worksheet for the Crystal Bay Dredgin;J PI'q:x)sal. em- cx:nnents are only adviso:ty. Based 'lJlX'n aIr review of the Regular E'AW, \'lI'e are concen1E!d that the dredg.in;J activity is only a response to a synptan am rot to the overall envirornnental problem. '!he area surrcAJl"rlin: Crystal Bay (MJd Bay) has been un:iergo.in;J a d1an;}e in character over the past several years. Halsin;J that now surroorrls the bay has recently been c:::onsb:ucted. Construction is still t.aki.rq place since the dredged material will be used for fill at two prqa;ed s.in;Jle family residential lots. '!be material to be dredged is over 75% silts am clays. '!he source of the material was prci:lably the residential deve1cpnent adjacent to the bay. To assure that the channel that is prqa;ed to be dredged remains <:pm, a strict erosion control program should be enacted am enforced. If erosion continues, sedi.Irentation of ower Prior Lake may also occur. Water quality am aquatic diversity may also result. '!berefore, before the dredgin;J of the channel aroun::1 Crystal Bay is allowed, the erosion control neasures shcW.d be reviewed am evaluated am enhanced. Sa.lrces of the sedi.Irentation shcW.d be detennined am controlled. We awreciate the ~rtunity to review the Regular Environmental Assessment Worksheet. If you have arrj questions, please feel free to contact me at (312) 886-7500. Sincerely yours, 0~lJ.J william D. Franz, arlef Environmental Review Brarrl1 Plannirg ani Management Division ~~'O \\u.\qo p\f METROPOLITAN COUNCIL Mears Parle Cenln. 230 East Fifth Slnet, St. Pwd, MN. 55101 612291-6359 January 8, 1990 RECElveo JAN - 9 1990 DftC[Ty OF r rllOR lAKE Mr. David Umacht City Manager City of Prior Lake 4629 Dakota Street S.E. Prior Lake, Minnesota 55372 Dear Mr. Umacht: Please find enclosed a staff report and committee report for the City of Prior Lake's Environmental Assessment Worksheet (EAW) on the Crystal Bay Dredging proposal. These documents are forwarded to the city at this time to meet the 30-day comment period. Full Metropolitan Council action on the EAW will take place January 11, 1990. t me at 291-6594 if I may be of further assistance. t ven Schwank Comprehensive Planning ... Metropolitan Council Meeting of January 11, 1990 Business Item: B-2 METROPOLITAN COUNCIL Mears Park Centre, 230 East Fifth St., St. Paul, Minnesota 55101 612/291-6359 REPORT OF THE METROPOLITAN AND COMMUNITY DEVELOPMENT COMMITTEE Referral Report No. 90-4 B DATE: January 5, 1990 SUBJECf: City of Prior Lake Environmental Assessment Worksheet Crystal Bay Dredging Proposal M C D C TO: Metropolitan Council BACKGROUND At its meeting on January 4, 1990 the Metropolitan and Community Development Committee discussed a staff report and recommendations dealing with the city of Prior Lake Environmental Assessment Worksheet for the dredging of Crystal Bay. ISSUES AND CONCERNS Steven Schwanke and Dick Osgood, Council staff (ext. 6594 and 6449), presented the report and answered questions from the committee. Staff was particularly concerned about the water quality of Crystal Bay and Prior Lake as a result of the dredging activity and the use of dredging spoils for fill in a residential development. Mr. Osgood clarified the staff report by stating it is unlikely the bay will ever re-fill through natural events to any great depth. Consequently, it is more accurate to classify Crystal Bay as a deep marsh. The dredged channel will prevent fishes from inhabiting the marsh, which is actually a very good fish spawning and foraging area. In addition, the dredged channel will provide a conduit to the main body of Prior Lake thereby bypassing the beneficial treatment properties of the marsh. Thus, relative to the existing conditions, there is a strong likelihood for negatively disturbing fISh habitat. Mr. David Vinlove, chairperson of the Crystal Bay homeowners association made a presentation to the committee. He indicated that the association will pay for all costs associated with the dredging of Crystal Bay. Water quality issues will be addressed through several measures including: dredging the bay during the winter; instituting a .no-wake" zone; and banking of the dredged channel. Mr. Vinlove's comments did not address the issue of the impact_pn fish habitat. Mr. David Umacht, City Manager for the city of Prior Lake, indicated that Mr. Vinlove's comments will be formally submitted to Council staff for further review and comment. FINDINGS 1. The city of Prior Lake has submitted an Environmental Assessment Worksheet (EA W) that proposes to dredge a portion of Crystal Bay, which is part of the upper Prior Lake in the city of Prior Lake. 2. The EA W is not complete because it fails to address the potential impacts of the dredging operation on Crystal Bay's water quality, on Prior Lake's water quality, on the likelihood for and subsequent control measures of aquatic weeds, and the potential of using dredged material for fill in a proposed residential development. RECOMMENDATIONS 1. That the Metropolitan Council adopt the staff report and findings as stated above as part of these recommendations. 2. That the city of Prior Lake amend the Crystal Bay EA W by addressing the issues raised in the report. 3. That these comments be forwarded to the Army Corps of Engineers, the Minnesota Department of Natural Resources, and the Prior Lake Spring Lake Watershed District. Respectfully submitted, Mary Hauser, Vice-Chair ( I , .. Metropolitan Council of the Twin Cities Area Mears Park Centre, 230 E. Sth 5t. 5t. Paul, Minnesota SS101 612-291-63S9fIDD 291-0904 DATE: December 28, 1989 TO: Metropolitan and Community Development Committee FROM: Steven Schwanke, Research and Long Range Planning SUBJECT: City of Prior Lake Environmental Assessment Worksheet Crystal Bay Dredging Proposal Metropolitan Council Referral File No. 15022-1 Metropolitan Council District No. 14 INTRODUCTION The city of Prior Lake has submitted an Environmental Assessment Worksheet (EA W) to the Metropolitan Council for review and comment. This environmental review is for a project that will dredge a 68 yard wide channel around three-fourths of the now-dry Crystal Bay, which is part of upper Prior Lake in the city of Prior Lake (figures 1 and 2). It is proposed to remove approximately 4S,OOO cubic yards of material from Crystal Bay. The dredged material will be used as fill for a residential development. ... The stated purpose for the dredging operation is to allow for the return of fish to the bay channel, create boating access to Prior Lake for the 110 homeowners living on and around the bay, and increase property values. All costs associated with the dredging operation will be financed by the Crystal Bay homeowners and by the developer. AUTHORI1Y TO REVIEW Environmental Assessment Worksheets (EA W) prepared under the Minnesota Environmental Policy Act must be submitted to the Metropolitan Council and other agencies. Any recipient of an environmental review document, or other interested party may make comments and recommendations to the city of Prior Lake. The Metropolitan Council received this EA W on December 12, 1989. The 3O-day comment period concludes on January 10, 1990. 1 ANALYSIS Natural Resources (Dick Osgood) Two environmental issues exist regarding the proposed dredging of Crystal Bay. The first is environmental consequences associated with the dredging operation. The second issue is the disposal of material taken from Crystal Bay. Crystal Bay has always been a shallow bay. It was known years ago as Mud Bay because it was so shallow. Two recent events have resulted in the proposal to dredge Crystal Bay. The first is the drought conditions of 1988 and 1989. Both years have had below normal rain and snowfall. Water level in the bay has dropped because of these drought conditions. There is no reason to believe, however, that with normal rain and snowfall, the water level in Crystal Bay will not eventually rise and the bay will re-fIll. The second event leading to the dredging proposal is development of land adjacent to Crystal Bay for residential purposes. The new residents assume that by living on the bay they are also guaranteed ready and unconstrained access to Prior Lake. While the Crystal Bay homeowners may be supportive of the dredging proposal, several features of Crystal Bay may make the dredging operation a waste of money and it may have negative environmental consequences. The highly organic bottom materials will probably be easily re-suspended throughout the bay's water columh because of the dredging operation and subsequent boat traffic. This has the potential to cause the rapid filling-in of the channel, which would render the project useless. In addition, the potential exists for the re-suspended organic materials to reach the main body of Prior Lake. One result than of the proposed dredging operation will be the reduced water quality of both Crystal Bay and Prior Lake. This issue is not addressed in the EA W. The EA W also fails to address the issue of aquatic plant life. Crystal Bay is a shallow water body. Shallow water bodies are susceptible to the proliferation of macrophytes (bottom dwelling aquatic plants). Chemicals and weed harvesters are used to control these weeds. Both approaches will add expense as well as the potential for additional environmental impact. A final environmental concern is that the EA W indicates the dredged material will be used as fill in a near-by residential development There appear to be several large wetlands in the area where the fill is proposed to be placed. The EA W does not address the possible impacts of placing this dredged material in this area It is also questionable whether "tibric peat", most likely partially decomposed cattails, is an appropriate fill for a residential development. These concerns need to be addressed in the EA W. FINDINGS 1. The city of Prior Lake has submitted an Environmental Assessment Worksheet (EA W) that proposes to dredge a portion of Crystal Bay. which is part of the upper Prior lake in the city of Prior Lake. 2 2. The EA W is not complete because it fails to address the potential impacts of the dredging operation on Crystal Bay's water quality, the Prior Lake's water quality, the likelihood for and subsequent control measures of aquatic weeds, and the potential of using dredged material for fill in a proposed residenti~l development RECOMMENDATIONS 1. That the Council adopt the staff report and findings as stated above as part of these recommendations. 2. That the city of Prior Lake amend the Crystal Bay EA W by addressing the issues raised in this report. 3. That these comments be forwarded to the Army Corps of Engineers, the Minnesota Department of Natural Resources, and the Prior Lake Spring Lake Watershed District. (h:\compplan\respllib\compplan\Crmrpt) 3 JANUARY 4, 1 990 ENVIRONMENTAL ASSESSMENT WORKSHEET CRYSTAL BAY DREDGING PROPOSAL-PRIOR LAKE AMENDMENT TO ORIGINAL EAW DATED 12/2/89 THE METROPOLITAN COUNCIL. IN A DECEMBER 28, 1989, MEMO TO THE METROPOLITAN AND COMMUNITY DEVELOPMENT COMMITTEE, HAS RAISED TWO ENVIRONMENTAL ISSUES REGARDING THE SUBJECT PROJECT. THE CRYSTAL BAY ASSOCIATION OF PRIOR LAKE WELCOMES THE OPPORTUNITY TO RESPOND TO THE CONCERNS. FOLLOWING IS THE ASSOCIATION/S REPLY. A) ENVIRONMENTAL CONSEQUENCES OF THE DREDGING OPERATION THE CRYSTAL BA'"( ASSOCIATION BELl EVES THAT THE DRClJl3HT CONDITIONS OF 1988 AND 1989 HAVE CREATED AN MOPPORTUNITY" FOR DREDGING THE BAY. THE EXTENDED DRY PERIOD HAS RESULTED IN IDEAL CONDITIONS TO PERFORM MMECHANICAL" DREDGING. THIS TYPE OF DREDGING BY BACK HOE OR DRAG LINE IS MORE ECONOMICAL THAN HYDRAULIC DREDGING. THE TIMING OF THE PROJECT, IN THE WINTER PERIOD. REDUCES THE E~NIRONMENTAL IMPACT OF DUST AND NOISE AND POSSIBLE ROAD DAMAGE. THE COMBINATION OF THESE FACTORS ENABLES THE AFFECTED HOME OWNERS TO FINANCE THE PROJECT ENTIRELY. PRESENTLY PRIOR LAKE/S WATER LEVEL IS ABOUT 895 FEET MSL. THE EXISTING OUTLET RELEASES WATER FROM PRIOR AT THE 902.5 LEVEL. AS INDICATED BY THE VALLEY ENGINEERING SURVEY OF THE BAY, THE BOTTOM PRESENTLY AVERAGES 897.1 FEET MSL. THE EAW SHOWS A CROSS SECTION OF THE PROPOSED CHANNEL TO BE, AT THE DEEPEST PORTION. 892 FEET MSL. IF A NORMAL WATER LEVEL IN THE FUTURE IS 900 FEET MSL, THIS CHANNEL WOULD ALLOW NAVIGATION TO AND FROM UPPER PRIOR LAKE. THIS WATER DEPTH WOULD MINIMIZE THE RE-SUSPENSION OF BOTTOM MATERIALS BY BOAT TRAFFIC. EVEN AT TODAY'S LEVEL OF" 895 FEET, THE CHANNEL WOULD HAVE A DEPTH OF 3 FEET! THE RETURN OF THE LAKE LEVEL TO 900 FEET WOULD RESULT IN A 3 FOOT DEPTH OVER THE UNDREDGED PORTION OF THE BAY. AS SHOWN ON THE CROSS SECTION OF THE PROPOSED CHANNEL, 4 TO 1 SLOPES ARE USED ON EITHER. SIDE OF THE MAIN PORTION. THESE SLOPES ALLOW THE PLACEMENT OF RELATIVELY SHORT DOCKS FROM SHORE AS WELL AS PROVIDING A METHOD OF MATERIAL RETENTION ON BOTH SIDES. THE FIBRIC PEAT MATERIAL, WHEN WET, IS QUITE DENSE AND VALLEY ENGINEERING FEELS THAT THE DREDGED CHANNEL SHOULD REMAIN USABLE FOR 5 TO 10 YEARS. IN ADDITION, THE ASSOCIATION WILL REQUEST A -NO WAKE- AREA BE DESIGNATED WITHIN THE ENTIRE BAY. THIS WILL ALSO MINIMIZE THE RE-SUSPENSION OF BOTTOM MATERIAL. ALSO RECOGNIZED IS THE FUTURE NEED FOR MAINTENANCE OF THE CHANNEL. FUNDS WILL BE PROVIDED BY THE ASSOCIATION TO MAINTAIN THE CHANNEL DEPTH AND ALSO TO CONTROL WEED GROWTH, AS REQUIRED. NO REQUEST FOR CHEMICAL USE IS ANTICIPATED. REQUIRED WEED CONTROL WOULD BE DONE MECHANICALLLY, WITH PERMIT AUTHORIZATION, TO MINIMIZE ENVIRONMENTAL IMPACT. B) SPOILS DISPOSAL ATTACHED I S A DRAWING PREPARED BY ......'ALLEY ENGINEERING FOR THE PROPOSED DISPOSAL SITES. THE SITES, AS SHOWN. ARE NOT WETLANDS. SILT FENCES ARE TO BE USED FOR SEDIMENT CONTROL. ALSO INCLUDED IS A LETTER INDICATING THE SEED MIX, MULCH. AND FERTILIZER TO BE USED FOR TURF ESTABLISHMENT. THE DREDGED MATERIAL WILL BE USED FOR BOTH FILL AND AS TOPSOIL. THE ORIGINAL EAW CONTAINS THE TWIN CITY TESTING/UNIVERSITY OF MINNESOTA SOIL TEST REPORTS. THE EXCAVATING CONTRACTOR AND THE DEt)ELOPMENT OWNERS ARE FULLY AWARE OF THE DREDGED MATERIAL COMPOSITION. THESE COMMENTS. INCLUDING ANY REVISIONS NEEDED, WILL BE FORWARDED PROMPTLY TO THE ARMY CORPS OF ENGINEERS, THE MINNESOTA DNR. AND THE PRIOR LAKE SPRING LAKE WATERSHED DISTRICT. AS REQUESTED. THANKS, cB~ ~~ DAVE VINLOl.JE CRYSTAL BAY ASSOCIATION Civil Engineer. und Surveyor. PI.nn.r. Valley Engineering Co., 'nc. (612) 447.2570 P.O. Box 478, Suite 120C 16670 Franklin Trail S.E. Prior Lake, Minnesota 55372 December 22, 1989 Mr. Larry Anderson, P.E. City Engineer City of Prior Lake 4629 Dakota St. Prior Lake, MN 55372 Subject: Excavating/Filling Permit - Crystal Bay Dredging Project. Dear Larry: Please review and approve the attached application. In addition we recommend the following conditions for turf establishment on the completed fill. SEED MIX: MoDOT NO. 700, 35 LBS/ACRE. MULCH: TYPE 1 BROWN OR DISC ANCHORED, 2 TONS/ACRE FERTILIZER: COMMERCIAL, NO PHOSPHOROUS, NITROGEN 50 LBS/ ACRE, POTASH 100 LBS/ ACRE GRADING CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE AND DISPOSITION OF EROSION AND SEDIMENT CONTROL PRACTICES DURING HIS TENURE ON SITE. Thank you for your attention to this matter. Please contact me if you have concerns about this work. s~cifAe11 " fi\ I / Jdtt;:~JUft~~~ Steven D. Harvey, ~ ?l)~.;) -" -.......- .-" , I , ,. :,.= / I I I I I. .~.-- . I ;..: :. "/. ~:~ , "e,.o, cert,', trl4t ."'. ",aft. ape( "'CO""" , ,. ,epo,' .01 pr~red .., 1M 0/1 1JI'I6e, III) d.. eCf .",~..-.oft eM tftOI I om o d"', Re"IItfH Prof...tOItol lng.n ..... ~ $fot. ~ . . 51.... '.~ IID,1. r/ol. ./Z-Z/-8; \Ave - 'fu'l\~ ~ \,,~ L ~~' O'.J \J')"~ January 5, 1990 To: All EAW Review Jurisdictions Re: crystal Ba~ Dredging Proposal city of Pr10r Lake "RGU" The attached amendment to the Crystal Bay Dredging Proposal EAW of December 2, 1989 is issued in response to a request of the Metropolitan and Community Development Committee of the Metro~olitan Council, dated December 28, 1989. A copy of that memo 1S attached. The concerns here were addressed, both in writing and with verbal presentation by Mr. Vinlove of the Crystal Bay Association, at "the Januarr 4, 1990 meeting of the Committee. The Committee adopted the1r staff findings, but requested that our amendment be forwarded to their staff and other EAW jurisdictions. The Metro~olitan Council staff will determine, after their analysis, if th1s amendment satisfies their concerns. Please contact me if any questions arise. Lake ) 1I0&' 0 {1Jf ,~,q \/~ DJU:db 4629 Dakota St. SE.. Prior Lake, Minnesota 55372 I Ph. (612) 4474230 I Fax (612) 4474245 INTER-OFFICE MEMO MEMORANDUM TO: FROM: RE: DATE: DAVID UNMACHT, CITY MANAGER HORST GRASER, DIRECTOR OF PLANNING CRYSTAL BAY EAW - FILL SITES DECEMBER 5, 1989 I have reviewed the Crystal Bay EAW and have made some minor recommendations in highlighted form. One of the elements of the EAW not discussed in detail was the location of the fill sites for the recovered material. I share your concern that this is one of the most visible aspects of the proposal and has the potential to affect the health and safety of people and future land use in the ~~cinity of the fill sites. The two proposed sites are located about one quarter mile north of County Road 82 and three quarter miles west of County Road 21. This area is part of the rural service area and is designated both A-1 and C-1 on the zoning map. Both sites are located in a rural single family development consisting of lots ranging from 6 to 14 acres in size. The physiograph~ of the area around the sites contains hills, swamps, depress1ons, and steep slopes. The proposed fill sites are two depressions with no standing water. Although there are environmental concerns which need to be addressed, I have no serious objections to the proposal. I have discussed the plans with Engineer Anderson and he suggests that these concerns can be addressed through the required permits necessary to fill the two depressions. I have walked through both sites with the contractor doing the hauling and have explained our concerns and requirements. I have asked the Building Official Gary Staber, to lo~ into City records the fill areas for purposes of future buildab1lity. Additional commitments to fill these two sites would re9Uire complete detail and complete processing of Prior Lake's fil11ng permit. ~ Iys~(r t! STATE OF ~~rn~@iJ~ DEPARTMENT OF NATURAL RESOURCES DNR INFORMATION (612) 296-6157 500 LAFAYETTE ROAD · ST. PAUL, MINNESOTA · 55155.40 January 9, 1990 Mr. David J. Unmacht City of Prior Lake 4629 Dakota Street S.E. Prior Lake, MN 55372 RE: Crystal Bay Dredging Proposal Environmental Assessment Worksheet (EA W) Dear Mr. Unmacht: ~~c J. '/2IV~D '4N 1 f ~CJJ:Y . ~ . "\.fl ~ The Department of Natural Resources has reviewed the above-referenced document, and we offer the following comments for your consideration. Our major concerns about this project are its impacts on fish and wildlife and their habitats. The EA W does not adequately address these impacts. An examination of historical lake levels on Prior Lake shows a wide range of fluctuation. Most of the homes around Crystal Bay were constructed during a period of relatively hi~h water. The bay should properly be considered wetland habitat adjacent to Pnor Lake, and the proposed project should be evaluated with this in mind. Under present water conditions, the bay would be classified as a Type 3 marsh. This wetland is undergoing a natural drawdown, or dewatering, which IS allowing the reestablishment of emergent vegetation. Under more "normal" water conditions, the bay would be classified as a Type 3/4 wetland. Periodic drawdowns, allowing the germination and growth of wetland plants, are necessary to restore wildlife productivity to the system. Aquatic plants provide food and cover for fish and wildlife and also provide a substrate for aquatic invertebrates, which are the foundation of the aquatic food chain. The proposed project would directly eliminate approximately five acres of this dynamic wetland system. Aquatic vegetation within the proposed channel would be eliminated during the dredging. The channel would probably remain barren due to the resuspension of sediments from boat traffic and as a result of chemical and mechanical weed control. Constructing the channel adjacent to the shoreline will eliminate especially valuable nearshore aquatic vegetation. The presence of the channel is likely to encourage homeowners to request that their shorelines be kept clear of aquatic vegetation and that sand blankets be placed for swimming beaches. Thus, this babitat would be permanently eliminated. The net result would be a decline in habitat value for a wide variety of wildlife species, including waterfowl, shorebirds, wading birds, some species of songbirds, mink, muskrat, raccoon, and several species of reptiles and amphibians. The EA W states that the channel will allow the return of fish to the bay. In general, space for fish is not as limiting as food. The proposed channel has the potential for AN EaUAL OPPORTUNITY EMPLOYER stranding fish during summer low water and for winterkill of fish during winter. The channel will also provide access into the bay for carp and other rough fish. Their actions may destroy aquatic vegetation throughout the entire bay through direct feeding and "rooting, and through shading caused by sediment resuspension. In summary, Crystal Bay is a dynamic wetland system that provides valuable fish and wildlife habitat. The proposed project will have direct ana indirect impacts on this resource. To avoid or mmimize these adverse impacts, we recommend that additional alternatives be evaluated. The "no-build" alternative should be considered. The basin would be recognized and appreciated for what it is: a wetland adjacent to Prior Lake. Eventually, higher water levels will return. A second alternative to consider is a community access located on one of the outlots and connected to Prior Lake by a direct channel. Overall impacts to the wetland basin would be reduced, while reasonable access to the lake would be provided. H it is decided that each lot owner must have access under all water conditions, a minimal-width (I5-foot bottom) channel should be constructed 50 feet offshore with docks extending from the shore to the channel. This alternative will still have substantial impacts on the aquatic environment. However, nearshore vegetation, which provides essential food and cover for fish and wildlife, would be preserved. The project as proposed in the EA W would be the most damaging alternative for na tural resources. The EA W does not provide much detail on the proposed dredged material disposal sites. Proper disposal sites and erosion control need to be addressed. According to aerial photos and the National Wetlands Inventory, wetlands are present in these general areas. If wetlands are proposed to be filled, adverse impacts and mitigation measures should be addressed. We would appreciate receiving a copy of your official response to our comments, which is now required by the amended Environmental Review Program rules. Thank you for the opportunity to review this EA W. If you have any questions regarding our comments, please call Don Buckhout at 612-296-8212. Sincerely, .~~tE?~ Thomas W. Balcom, Supervisor NR Planning and Review Services #900104-1 c: Kathleen Wallace Steve Colvin Laurel Reeves Gregg Downing - EQB Robert Welford - USFWS Dave Vinlove - Crystal Bay Association ERL/crystal Civil Engineers land Surveyors Planne,s Valley Engineering Co.. Inc. (612) 447-2570 P.O. Box 478, Suite 120C 16670 Franklin Trail S.E. Prior Lake, Minnesota 55372 January 5, 1990 Mr. Larry Anderson, P.E. Director of Public Works 4629 Dakota St. S.E. Prior Lake, Minnesota 55372 Subject: Crystal Cove Dredging. Dear Larry: Thank you for summar~zLng the concerns relating to the subject project. We met with Mr. Vinlove on January 4 in order to address these concerns and consequently offer the following responses. Item 1.A. - Seepage: We've observed that the main body of water in the lake on October 1 was at an elevation of 895.9 which is 0.5 feet lower than the lowest measured surface elevation in Crystal Bay. The bay is apparently isolated from the main lake yet the main lake water level continues to recede. The effect that the dredged channel may have on the seepage cannot be determined from the data available to us but it does appear that the subsiding lake level is not necessarily affected by Crystal Bay. Sand was encountered at the boring located on grid point B-6 at elevation 889.2, 8.5 feet below the surface. The bottom of excavation is proposed at elevation 892 which would leave a 2.8 feet mantle of fibrous peat above the sand interface. At this time we have no information about the ability of the peat to retard seepage nor all::I information about any potential confining layers below the sand. Item 1.B. - Immediate effect on lake levels: Our knowledge of the subsurface water levels in the bay is only guess work at this time. The bay is dry and no correlation between the main lake level and the ground water level in the bay has been established. If a hypothetical situation were to develop whereby a dry channel could be excavated to elevation 892 and the main lake remained at an elevation of perhaps 895 then the dredged channel could accommodate approximately 8.25 acre-feet of water to match the level of the main lake. Using your calculation of 0.89 inches of drop per 172,000 cubic yards remove the corresponding immediate effect for the hypothetical situation would be one-sixteenth of an inch drop in the overall lake level. Item 2.A. - Mud-lee-Debris: The Crystal Bay Association will require their contractor to clean up the haul roads on a daily basis through the use of a bobcat and road salt. Item 2.B. - Trucks/Scrapers: The projected ADT from haul trucks is 112 per day. No scrapers will be used to haul material to the disposal site. Item 2.C. - Flagmen: It is not anticipated that flagmen will be necessary since no scrapers will be used. If the public safety department should determine the need then a flagman would be hired. Item 2.0. - Project completion and load restrictions: The targeted completion date is March 1, 1990. If early load restrictions are imposed then the contractor will be directed to haul short loads and work longer hours. If this were not feasible then the project completion would be continued until March 1, 1991. Item 3. - Letter of credit and insurance: Mr. Vinlove will arrange for the submission of these items. Item 4. - Future bays: Using your calculations again we would suggest that for every 10,000 cubic yards of dredging below a given water elevation a corresponding drop of 0.05 inch in the main lake level would result. Thank you for reviewing this information. The Application for Excavating/Filling Permit and supporting information are attached. Sincerely, ! ' ) / / ./1 j' II r ' . - . . .jj;X;'~Xijd/'0!21 Steven D. Harvey, P .E';/ 1 ~ c.c. Dave Vinlove 1 60 ROOS : I " -'~ I I I I I G I .~. .' . . -, ~/ T - - 7~ ~QD!._ -- - -~, l.._+_____ (/ -- ::.r..,...: \...~ / // . .... .. . .. " I I I I I --:-..:1_ o T .,,1 l_E -- - F'~ /~ -~'\ " I r \ . -' { ". ./ /'-- ~ --- --( RfNU ELLIS Ii ET L Z~J7 21 I --./ ~"\ \ \- \ \' / I I a / \ / // J f SCALE ,-. ZOO' ~ A G ( . . . f'~ I.~~ . __._ __. _ CUL. "OUTE --- . . ..ICOH~ lOl.6U !! ALTEJlNA1 .. " OTTO HOf' "1.61 I.. ...1.4. s a g l&e4lU - I 24 1 148 - 41& 2 '&44417 . . . 8 p 2. { 8 \..p.~€. p~\O~ I " ........ . '" ff/ .. ~,-~I . #~ /~ ~ .~ I) I. f BUll 015 Civil Engineers land Surveyors Planners Valley Engineering Co., Inc. (612) 447-2570 P.O. Box 478. Suite 120C 16670 Franklin Trail S.E. Prior Lake, Minnesota 55372 December 22, 1989 Mr. Larry Anderson, P.E. City Engineer City of Prior Lake 4629 Dakota St. Prior Lake, MN 55372 Subject: Excavating/Filling Permit - Crystal Bay Dredging Project. Dear Larry: Please review and approve the attached application. In addition we recommend the following conditions for turf establishment on the completed fill. SEED MIX: MnDOT NO. 700, 35 LBS/ACRE. MULCH: TYPE 1 BLOWN OR DISC ANCHORED, 2 TONS/ACRE FERTILIZER: COMMERCIAL, NO PHOSPHOROUS, NITROGEN 50 LBS/ACRE, POTASH 100 LBS/ACRE GRADING CONTRACTOR SHALL BE RESPONSIBLE FOR MAINTENANCE AND DISPOSITION OF EROSION AND SEDIMENT CONTROL PRACTICES DURING HIS TENURE ON SITE. Thank you for your attention to this matter. Please contact me if you have concerns about this work. ~JJtL Steven D. Harvey, ~ CITY OF PRIOR LAKE .~ APPLICATION FOR EXCA V ATING/FILLING PERMIT Permit No. Date / / 447-4230 Applicant Address: Crystal Bay Association 15738 Island View Rd. N.W., Prior Lake, MN 55372 Phone # 440-6440 Property Owner: Fill Site: Steve Vanden Heuvel / Lee Dunf'ee Address: 38178 Golf Ave.. North Branch. MN 55056 Phone' 462-1q"-38 Contractor: B & C Excavating Address: P.O. BOX 276, Savage, MN 55378 Phone # 440-2310 Consultant Engineer/Surveyor Valley Enp:ineerinp: Co.. Inc. Address: 16670 Franklin Trail S.E., Prior Lake, MN 55372 Location of Property: 15nn' R of Co Rd 21 north. of Co. Rd 82 Phone , 447-2570 Legal Description: mnmXk<muxX3a<rt1l:xt1:ax Alvern AcreR, Scott County Will the excavation or filling be in a: Watercourse yes Wetland no Upland yes Dredge Crystal Bay Channel and deposit spoil upland Purpose for the proposed excavating or filling: Estimated start date : January 15. 1990 Completion date: July 1, 1qqO What is the type of material to be removed or deposited: Peat In what manner will the material be removed and/or deposited? Removal by backhoe, tram'\port Rnn nepoR i t.i on by single-axle tandem trucks. What highway, street, or other public way will material for removal or depositation be hauled or carried? Fremont Ave. & ~l, Niny, ~&.eet, avenue, lane, alley, highway, right of way, thoroughfare or public ground will be obstructed? nnnp IT SHALL BE THE RESPONSmILITY AND THE BURDEN OF THE APPUCANT TO DEMONSTRATE TO THE SATISFACI10N OF THE CITY ENGINEER FOR THE CITY OF PRIOR LAKE THAT THE PROPOSED EXCA V A TION AND/OR FILUNG COMPUES WITH THE OVERALL CITY OF PRIOR LAKE STORM WATER MANAGEMENT PLAN" SAID BURDEN SHALL INCLUDE THE FURNISHING OF A REPORT WITH SUPPORT- ING CALCULATIONS OF A REGISTERED PROFESSIONAL ENGINEER. Will proposed excavation or depositon affect the City of Prior Lake overall storm water management plan? Yes _ No!...- If yes, show proposed effect. SUBMISSION REQUIREMENTS: (A) Completed application fonn (8) Completed legal description (C) Map or plat of the proposed filling or excavating showing location and amount of material proposed to be removed of deposited, with a description of the area (0) The depth or heights to which such removal or deposition is proposed throughout the area and the proposed angle of all slopes to be shown on a 2' contour map at a scale of 1" - SO' or larger: The proposed and original contours shall be shown in. cluding all property within ISO' of proposed excavation or deposition and shall be signed by an engineer or surveyor registered in the State of Minnesota (E) ErotIion control plan (F) Affect on existing utilities (0) Protection of lite by erection of suitable fence, guard or barricade (H) Application fee (I) Bond, letter of credit, or deposit of monies in a sum sufficienl to pay the cost of restoring I site. The extra ordinary costs of repairina, highways, streets or other public ways alona designated routes of travel and to pay such expenses as the Oty may incur by reason of doing anything required to be done (J) Public liability insurmce. Amount of bond Letter of credit, Signature of applicant or deposit of money liab~ insurance provided G~\' ~"'i ~~f( ~ ~'Date~ Date Permit fee Pennit deposit City Engineer Permit is valid if signed by City Engineer. -<.'/ I I 1 \ J , =:'9:"7 ,~ ......-.. ;' / / ,. ~: "/. / . ;/ ~~ ---- i..-'" ,,. . .I . /.,'. '. \ . , I herlO; c.,'t,f, mot tru. "Ion. apet,t"gltO>Il, aI 'epo,' .01 prepcn ed b, mtr 0/1 1JI'I6e' III, cS.. .C1 ."''"' .,-.oft oM tftOI I om o d,,')' R.,.stHH P,O'...lOllol [n..n __~ Store ~ . . - ~.... ..c 11051- [jOlt -'t.-z/-~ \