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Home My WebLink About2007-09-26 CC FYI Meeting Centennial Fire District 7741 Lake Drive Lino Lakes, MN 55014 (651) 784-7472 - Office (651) 784-2427 - Fax September 26, 2007 Centerville Lions Haunted House Terry Sweeney This is the list of items that will need to be addressed prior to the Haunted House event. 1. An evacuation plan will have to be developed and all staff will need to have a copy of this plan and a working knowledge of the procedures in it. All patrons and staffwill have to be accounted for. 2. Flood lights will have to be installed throughout the event area and exits. These lights need to be controlled from a constantly attended location and turned on immediately if a situation arises. 3. All event sounds and music will need to be shut down with a single switch. 4. An electrical inspection of all circuits, outlets and fixtures will need to be completed by a licensed electrician. A signed certificate will need to submitted stating system is compliant. 5. Occupant load will have to be maintained below 20 participants and plan for accountability demonstrated. 6. All exit and emergency lights will need to be operational. 7. Fire watch will need to be present. Person must make rounds every 15 minute's. Must have a radio or phone to activate 911. This will be the only task for this person. 8. Building will only be used for this event on October 19,20,26 and 27 2007 from 1800 hours to 2200 hours.( 600 PM to 1000 PM) 9. Post notice of mold issue at entrance. 10.Insurance binder will need to have City of Centerville and Centennial Fire District as additionally insured. l1.In the event this building will be used next year, all applicable City and State Codes will need to be adhered to. All the above items need to be completed three days prior to the opening of the event. October 16, 2007. As the event is operating spot checks will be performed by the Centennial Fire District and/or The City of Centerville. Signed: Terry Sweeney Centerville Lions Dated: Rich Defoe Building Owner Dated: Dallas Larson City Administrator City of Centerville Dated: Paul Palzer Building Official City of Centerville Dated: Milo Bennett Fire Chief Centennial Fire District Dated: ~ Centennial Fire District 7741 Lake Drive Lino Lakes, MN 55014 (651) 784-7472 - Office (651) 784-2427 - Fax 2000 International Fire Code DEFINITION 202. Special Amusement Building. A building that is temporary, permanent or mobile that contains a device or system that conveys passengers or provides a walkway along, around or over a course in any direction as a form of amusement arranged so that the egress path is not readily apparent due to visual or audio distractions or an intentionally confounded egress path, or is not readily available because of a mode of conveyance through the building or structure. PERMITS 105.6 Required operational permits. The code official is authorized to issue operational permits for the operations set forth in sections 105.6.1 through 105.6.46. 105.6.2 Amusement buildings. An operational permit is required to operate a special amusement building. ALARMS 907.2.11 Special amusement buildings. An approved automatic smoke detection system shall be provided in special amusement buildings in accordance with this section. Exception: In areas where ambient conditions will cause a smoke detection system to alarm, an approved alternative type of automatic detector shall be installed. 907.2.11.1 Alarm. Activation of any single smoke detector, the automatic sprinkler system or any other automatic fire detection device shall immediately sound an alarm at the building at a constantly attended location from which emergency action can be initiated, including the capability of manual initiation of requirements in Section 907.2.11.2. 907.2.11.22 System response. The activation of two or more smoke detectors, a single smoke detector with alarm verification, the alitomatic sprinkler system or other approved fire detection device shall automaticlly: 1. Cause illumination of the means of egress with light of not less than 1 foot-candle (11 Lux) at the walking surface level; 2. Stop any conflicting or confusing sounds and visual distractions; and 3. Activate an approved directional exit marking that will become apparent in a emergency. Such system response shall also include activation of a prerecorded message, clearly audible throughout the special amusement building, instructing patrons to proceed to the nearest exit. Alarm signals used in conjunction with the prerecorded message shall produce a sound which is distinctive from other sounds used during normal operation. The wiring of the auxiliary devices and equipment used to accomplish the above fIfe safety functions shall be monitored for integrity in accordance with NFP A 72. 907.2.11.3 Emergency voice/alarm communication system. An emergency voice/alarm communication system, which is allowed to serve as a public address system. Shall be installed in accordance with NFP A 72 and be audible throughout the entire special amusement building. SUPPRESSION 903.2.15 Other required suppression systems. In addition to the requirements of Section 903.2, the provisions indicated in Table 903.2.15 also require the installation of a suppression system for certain buildings and areas. Table 903.2.15 Section : International Building Code: Sprinkler requirements as set forth in Section 903.2.15 of the International Building Code. SUPPRESSION and ALARMS 2000 International Building Code 903.2.15 Other required suppression systems. In addition to the requirements of Section 903.2, the provisions indicated in Tanble 903.2.15 also requires the installation of a suppression system for certain buildings and areas. Table 903.2.15 411.4 Special amusement buildings. 411.1 General. Special amusement buildings having an occupant load of 50 or more shall comply with the requirements for the appropriate Group A occupancy and this section. Amusement buildings having an occupant load of less than 50 shall comply with the requirements for the appropriate Group B occupancy and this section. Exception: Amusement buildings or portions thereof that are without walls or a roof and constructed to prevent the accumulation of smoke. For flammable decorative materials, see the International Fire Code. 411.2 Special amusement building. A special amusement building is any temporary or permanent or portion thereof that is occupied for amusement, entertainment or educational purposes and that contain a device or system that conveys passengers or provides a walkway along, around or over a course in any direction so arranged that the means of egress path is not readily apparent due to visual or audio distractions or is intentionally confounded or is not readily available because of the nature of the attraction or mode of conveyance through the building or structure. 411.3 Automatic fire detection. Special amusement buildings shall be equipped with an automatic fire detection system in accordance with Section 907. 411.4 Automatic sprinklers. Special amusement buildings shall be equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1. Where the special amusement building is temporary, the sprinkler water supply shall be of an approved temporary means. Exception: Automatic fire sprinkles are not required where the total floor area of a temporary special amusement building is less than 1,000 square feet and the travel distance from any point to an exit is less than 50 feet. 411.5 Alarm.. Activation of any single smoke detector, the automatic sprinkler system or any other automatic fire detection device shall immediately sound an alarm at the building at a constantly attended location from which emergency action can be initiated, including the capability of manual initiation of requirements in Section 907.2.11.2. 411.6 Emergency voice/alarm communication system. An emergency voice/alarm communications system shall be provided in accordance with Sections 907.2.11 and 907.2.12.2, which is also permitted to serve as a public address system and shall be audible throughout the entire special amusement building. I! 411.7 Exit marking. Exit signs shall be installed at amusement building required exit and exit access doorways. Approved directional exit markings shall also be provided. Where mirrors, mazes or other designs are utilized that disguise the path of egress travel such that they are not apparent, approved low-level exit signs and directional path markings shall be provided and located not more than 8 inches above the walking surface and on or near the path of egress travel. Such markings shall become visible in an emergency. The directional exit marking shall be activated by the automatic detection system and the automatic sprinkler system in accordance with Section 907.2.11.2 411.8 Interior rmish. The interior finish shall be Class A in accordance with Section 803.1 803.1 Interior finishes: General. Interior wall and ceiling finishes shall be classified in accordance with ASTM E 84. Such interior finish materials shall be grouped in the following classes in accordance with their flame spread and smoke-developed index. Class A: Flame spread 0-25; smoke developed 0-450 Class B: Flame spread 26-75; smoke developed 0-450 Class C: Flame spread 76-200; smoke developed 0-450 Fire Watch: A temporary measure intended to ensure continuous and systematic surveillance of a building or portion thereof by one or more qualified individuals for the purposes of identifying and controlling fire hazards, detecting early signs of unwanted fire, raising an alarm of fire and notifying the fire department. David Bruder Fire Inspector Centennial Fire District CC: Milo Bennett, FIre Chief Paul Palser, Centerville Building Department . Stockholder's Report Fall 2007 Major Accomplishments ~Students Excelled in Achievement, Attendance, and Behavior; ~Outstanding Evidence of Fiscal Accountability; ~Strategic Plan Completed; ~Quality Compensation Funded/Implemented; ~Language Arts/Reading Curricula Adopted; World Language Curricula Adopted; ~ All Day Kindergarten Implemented. Stockholder's Report Fall 2007 Student Academic Accountability ~490 Centennial High School Graduates ~248 Centennial High School Graduates with Honors ~543 Centennial Middle School Honors Students (3 quarters of grade point average 3.667 to 4.0) ~32 Centennial Area Learning Center Graduates ~9 JOURNEY Graduates ~ 162 Centennial High School National Honor Society ~ 96.30/0 Attendance Rate ~ Expulsions: 5 High School, 0 Middle School ~ Suspensions: 77 High School, 15 Middle School (3-5 days) ~Test Scores/Comparisons Stockholder's Report Fall 2007 Student Academic Accountability ~Test Scores/Comparisons Reading Proficiency by Grade 1m CENTENNIAL Reading. STATE Reading I 100.0% 90.0% 80.0% 70.0% 60.0% .. c ~ 50.0% .. 11. 40.0% 30.0% 20.0% 10.0% 0.0% 3 4 5 6 7 8 10 ALL Grade Math Proficiency by Grade 10 CENTENNIAl Math. STATE Math I 100.0% 90.0% 80.0% 70.0% C 60.0% I 50.0% 40.0% 30.0% 20.0% 10.0% 0.0% 3 4 5 6 7 8 11 ALL Grade Stockholder's Report Fall 2007 Student Academic Accountability ~Test Scores/Com 90.00% 80.00% 70.00% 60.00% j 50.00% 40.00% 30.00% 20.00% 10.00% 0.00% 90.00% 80.00% 70.00% 60.00% I 50.00% 40.00% 30.00% 20.00% 10.00% 0.00% Stockholder's Report Fall 2007 Student Academic Accountability ~Test Scores/Com 100.00% 90.00% 80.00% 70.00% 60.00% I 50.00% 40.00% 30.00% 20.00% 10.00% 0.00% Stockholder's Report Fall 2007 Fiscal Accountability ~Investment of levy referendum in fund balance ($2.5 million) ~Bond refundings (Twice lowered taxes $5.0 million) ~Q Comp implementation ($1.3 million in new revenue without local levy) ~Competitive grants ($.5 million in competitive revenue) ~Low spending school district (Lowest in 5 County Metro area) ($9 million/year less than State average) Stockholder's Report Fall 2007 Promises Fulfilled Operating Levy Referendum ~Staffing, Teachers (27 positions) $1,350,000 ~Staffing, Paraprofessional (10 positions) $ 160,000 ~Textbooks $ 250,000 ~Supplies $ 105,000 ~Activity Fee Reduction $ 17,000 ~Extracurricular Programs $ 25,000 ~Team Transportation $ 15,000 ~Staffing, Assistant Principal, Gifted Reinstatement J 180,000 Total $2,102,000 , , 2335 Highway 36 W St. Paul, MN 55113 Tel 651-636-4600 Fax 651-636-1311 I . www.bonestroo.com September 26, 2007 -#- Bonestroo Honorable Mayor and City Council 1880 Main Street Centerville, MN 55038 Re: Hidden Spring Park construction issues to be addressed Bonestroo File No.: 616-07155-0 To Honorable Mayor and City Council, I want to thank Mayor Capra, Suzanne Seeley, and Dallas Larson for meeting Dale Tranter and me at Hidden Spring Park to discuss your concerns. I genuinely appreciate your candid comments and willingness to work with us on this project. Your commitment to rectifying this issue openly, honestly, and professionally is appreciated. We have met with Veit Construction to discuss solutions to your concerns. Below you will find an outline of each item we discussed at our meeting, a solution to the item, and a timeline for getting this work done. We have asked Veit to co-sign this letter to show our mutual commitment to following through on these items. 1. Graffiti in the concrete sidewalk on the LaMotte Park side of LaMotte Drive. a. Remedy - The concrete will be replaced and backfilled. b. Timeline - COMPLETED 2. The rainwater garden overflow is in the middle of the raingarden instead of at the designed overflow location. a. Remedy - The overflow will be incorporating the recommendations of Bonestroo's water resources engineer. See the attached memo. b. Timeline - By October 1 th 3. Draintile was added to the raingarden. This newly added draintile does not discharge at the head of the swale. The City is wondering if the discharge point decreases water quality treatment. a. Rice Creek Watershed District has reviewed the draintile. They have written a letter saying the draintile as installed is acceptable. See the attached memo from Elizabeth Muller of Rice Creek Watershed District. 4. The outlet for the added draintile is unsightly. a. Remedy - Stone will be added to the outlet of the draintile. b. Timeline - By October 12th St. Paul 51. Cloud Rochester Milwaukee Chicago City of Centerville Hidden Spring Park Page 2 September 26 2007 5. The City wondered if the hydrant could be used to test how long it takes for the raingarden to empty. a. Following the September 10th meeting when this issue was brought up, the area received. substantial rain. Jeff McDowell visited the raingarden approximately 24 hours after the rain event. Wood chips along the side of the raingarden clearly showed the raingarden had filled to capacity. The water level had dropped approximately 12 inches within those 24 hours, and the draintile was flowing slow and steady. This information was forwarded to Gregg Thompson, and he responded by saying the drain-down times seemed good to him (see attached email chain). b. If the City would like a more controlled drain-down test, Bonestroo will use the hydrant to fill the raingarden and time how long it takes to empty. 6. Can the raingarden sand/compost mix be tested to show compliance with the design? a. Remedy - Gregg Thompson visited the site and used a penetrometer to test the raingarden soils. He was able to easily push in the penetrometer to its full depth of 30". Gregg responded that the soils" appear to be in really good shape". In addition, Veit has submitted the raingarden soil mix tickets from Plaistads. See attached email correspondence and tickets. b. Timeline - COMPLETED 7. Can we verify that the raingarden is meeting the design requirements? a. Remedy - An as-built survey was conducted to verify that the built raingarden meets the Watershed District's requirements. See the attached memo from Earth Evans. Also see the attached memo from the watershed. b. Timeline - COMPLETED 8. Plants in the raingarden and along the side of the raingarden have died. a. Remedy - A replacement plant list will be provided, and the dead plants will be replaced. b. Timeline - By October 12, 2007 9. Add a gravel path near the shoreline to clearly define pedestrian walkways through the plantings. a. Remedy - At the direction of the Council, three gravel extensions will be built. b. Timeline - By October 12, 2007 10. The biorolls were installed using two methods. One method has the bioroll pinned to the shoreline at the water level. The second has the bioroll offset from the shoreline. The City has asked which installation method is correct. a. The intended method of construction is to have the biorolls away from the shore, and acting as a wave break. The design also calls for aquatic plants to be planted between the bioroll and the shoreline. Ultimately, it's the roots from the aquatic plants that provide erosion protection. The bioroll is meant to be a temporary measure to protect the plants during establishment. b. Remedy - Bonestroo will provide additional shoreline stabilization in the spring of 2008. Per Gregg Thompson's email, Bonestroo will plant additional shrub and perennial plantings along the shoreline. In addition, Bonestroo will provide a temporary wave break during plant establishment. We are currently evaluating wave break options, and will work with the Watershed District and the City on an acceptable solution. c. Timeline - Spring of 2008. Because the growing season has come to an end, it's best to wait until next spring to install the plants and temporary wave break. L______ City of CenteNil/e Hidden Spring Park Page 3 September 26, 2007 11. The farthest north section of shoreline does not have a bioroll. a. Remedy - Biorolls will be installed, topsoil backfill will be placed along with erosion control blanket and replacement plantings. b. Timeline - October 12, 2007 12. The floating silt fence has floated into shore. In some areas it has jumped the bioroll stakes and has washed up next to the plants. a. Remedy - Bonestroo will seek the Watershed District's approval to remove the floating silt curtain. Once approval is granted, the floating silt fence will be removed. b. Timeline - Fall of 2007 13. A portion of the gravel trail near the lake eroded. a. Remedy - A row of sod (approximately 3' x 20') will be added along the edge of the trail, and the trail will be regraded. b, Timeline - In Progress 14. The rip rap near the lake is eroding around the edges. a. Remedy - Fabric along the edge of the channel will be provided and rip rap replaced. b. Timeline - October 12, 2007 15. Near the swing there is a depression in the path. a, Remedy - The depression will be filled with gravel. b. Timeline - October 12, 2007 16. The rock outcroppings at the raingarden have voids. a. Remedy - Voids will be filled with concrete. b. Timeline - October 12, 2007 17. At the head of the artesian well, the rocks should be large enough to be difficult for people to move. a. Remedy - A rock that is approximately 3' x 4' x 6" (or two rocks that are 12") will be provided and placed over the artesian well. b, Timeline - October 12, 2007 18. A tree that was trimmed did not get dressed. a. Remedy - Wounds will be dressed. b. Timeline - COMPLETED 19. The bike rack landing area was sodded when it should be gravel. a. Remedy - Sod will be removed. b. Timeline - COMPLETED 20. Park bench support poles are not at the same elevation. a. Remedy - Benches will be leveled. b. Timeline - COMPLETED 21. Drinking fountain is not plumb. a. Remedy - Fountain will be plumbed. b. Timeline - COMPLETED 22. The drinking fountain's hose bib is not easily accessible, a. Remedy - An angled connection to make access easier will be provided. b. Timeline - October 12, 2007 23. A portion of the asphalt trail and the LaMotte Park parking lot was damaged during construction. a. Remedy - The lot will be repaired. b. Timeline - October 12, 2007 City of Centervllle Hidden Spring Park Page 4 September 26, 2007 Once again, we appreciate your willingness to work with us on these issues. If you have any questions, or more items you would like addressed, please call me directly at (651) 604-4798. Sincerely I 9ift&~~ Jeff McDowell, RLA Bonestroo d;:.Sh R- Veit CC: Dallas Larson, City Administrator, City of Centerville Paul Palzer, Public Works Director, City of Centerville Suzanne Seeley, Park Committee Chair, City of Centerville Kevin Amundsen, Park Committee Vice-Chair, City of Centerville Gregg Thompson, Association of Metropolitan Soil and Water Conservation Districts Elizabeth Muller, Rice Creek Watershed District Jesse Roush, Veit Mark Statz, Bonestroo Attachments: Letter from RWC dated September 21, 2007 Email from Gregg Thompson dated September 21, 2007 Raingarden soil tickets from Plaistads Memo from Earth Evans 4325 Pheasant Ridge Dr. NE #611 . Blaine, MN 55449-4539 Phone: 763-398-3070. Fax: 763-398-3088 VI/V-/VV. ri c ecreek...org Dallas Larson, City of Centerville 1880 Main Street Centerville, MN 55038 Re: Rice Creek Watershed District Permit #07-059, Hidden Springs Park, Centerville The RCWD conducted a site inspection at the project identified above on September 10, 2007. This letter serves to follow up on the tile drain discussions held on site at the time of inspection. The additional drain tile is acceptable in terms of the Rice Creek Watershed District permit. The necessary treatment for this site is contained within the main part of the raingarden. The swale exists to convey and treat overflow from this main raingarden in large rainfall events. The swale does need to be operating as the overflow path rather than the overland area where the drain tile was installed. This was discussed during the site meeting and the necessary adjustments were agreed upon. These items are part of RCWD standards and are enforceable under RCWD Rule (MS 103D). If you have any questions, please contact me at 763-398-3074. Sincerely, ~~ Elizabeth Muller District Inspector Cc: Mary Capra, Mayor ofC~nterville Suzanne Seely, Centerville Parks and Recreation Mark Statz, Bonestroo Jeff McDowell. Bonestroo Dale Tranter~ Bonestroo City of Centerville MPCA RCWD Permit File #07-059 BOARD OF MANAGERS >> Barbara A. Haake Ramsey County Rick A. Mastell Anoka County Susan R. Oven Ramsev Couney Donald J. Steinke Al10ka Couney John J. Waller Washingron County @ PI inCE:d on t:J"'.' I"€cyc:eo. 30,'-. P(I~t'curISW1~€I. papEr using veg:axabl~ by:d id:; .... Page 1 of3 Statz, Mark R From: Gregg Thompson [metroswcd@isd.net] Sent: Friday, September 21, 20074:30 PM To: McDowell, Jeff J; Statz, Mark R Cc: Smyth, John R; dlarson@centervillemn.com Subject: Re: Centerville Park - raingarden & shoreland stabilization / buffer Jeffs drain-down time observations and Mark's clarifications sound good to me. Regarding the meeting on September 26th, I'm going to be in Dakota County all day, so I won't be able to make it. Please keep in touch if there is anything I can do. Thanks, Gregg Gregg Thompson Urban Conservation Specialist Association of Metropolitan Soil & Water Conservation Districts 16015 Central Avenue NE #103 Ham Lake, MN 55304 (763) 434-2030 x. 15 (763) 286-6985 (cell) metroswcd@isd.net ----- Original Message ----- From: McDowell. Jeff J To: Statz. Mark R ; Gregg Thompson Cc: Smyth. John R ; dlarson@centervillemn.com Sent: Friday, September 21,20074:13 PM Subject: RE: Centerville Park - raingarden & shoreland stabilization / buffer Gregg, I visited the raingarden on Wednesday approximately 24 hours after Tuesday's rain. Floating woodchips clearly showed that the raingarden had filled to it's capacity. Within the 24-hours since the rain, the water level had dropped approximately 15 inches. There was still about 10 inches of water in the raingarden. The draintile was flowing slow and steady. Based on this site visit, it seems to me that the raingarden is meeting the retention needs. Feel free to call me if you have any questions. Jeff McDowell, RLA Associate Tel 651-604-4798 Cell 651-492-9124 ieff. mcdowell(1i) bonestroo .com I 0 Right-click here to download pictures. To help protect your privacy, Outlook prevented automatic download of this picture from the Internet. 9/25/2007 . Page 2 of 3 From: Statz, Mark R Sent: Friday, September 21,20072:40 PM To: 'Gregg Thompson' Cc: McDowell, Jeff J; Smyth, John R; 'dlarson@centervillemn.com' Subject: RE: Centerville Park - raingarden & shoreland stabilization / buffer Gregg, Thanks a lot for the evaluation. The council and parks folks are going to meet on site at 6:00 on Wednesday the 26th. We would love to have you there if you could make it. If you want to bring your power point, we could view it at the council meeting afterwards (7:00). A couple of things I could clarify for you: . Side slopes of the rain garden were only recently planted and haven't had much of a chance to fill in. We do, however, plan to add some more plantings to areas without plants. . The rain garden has been draining in sufficient time since we modified the drain tile outlet. Originally, the draintile ran into the outlet structure. The invert of the outlet structure, however, was higher than the draintile violating the old rule that water does not run uphill. Since we bypassed the outlet structure and took the draintile into the swale to outlet, the garden has drained properly. It was during this time that the rain garden drain tile was not functioning, that most of our plants died. We plan to replace those plants (some in kind because we think they will survive now that the rain garden is functioning properly and others we will replace with more hearty species such as those which have made it despite the prolonged inundation). . The floating silt curtain has never been meant to be a wave breaker and has caused us a lot of headaches. It's there as part of our temporary erosion control plan. We will be removing it soon. Thanks again. We will run some of your suggestions past the council and parks board to see if they would like to install those items. Mark Statz, PE Associate Tel 651-604-4709 Cell 651-775-5126 mark.statz@bonestroo.com .. Bonestroo "'"...,__......-."-.,.-...,.......,....,."~""""_,___.~...,...,'''''''''.,,......,.,.....,,.,.-,_.-,_--,...~,_''"<<.......,.,..,.,.,.,....,...,.......,...."'^''''.,_..,w:.".....__".^'""'_y.._.,~._,._,.'.......,."...4.,,.,..""_~..__,.,._,...,,".'.,~~._~"""""""_"___.",._'.......,_._"'_..,,,._"_,,_'...,_,,_______'''__,--,,._~',....__'.:._"',."''''__,._.__._,_'':,,._.,._''''........,.~.,.....~''_w From: Gregg Thompson [mailto:metroswcd@isd.net] Sent: Friday, September 21,20072:17 PM To: Statz, Mark R Cc: Thompson, Gregg Subject: Centerville Park - raingarden & shoreland stabilization / buffer Mark, Thanks for the call. I had gotten a chance to go out to this park on Centerville Lake last Friday (9/14), along with my co-worker Shawn Tracy. 9/25/2007 . Page 3 of3 Bioretention Area: Upon our site visit, the surface of the bioretention / raingarden area was dry. We used a soil-penetrometer on the replacement soils in the raingarden and we were easily able to push in the penetrometer to its full length of 30" - soils in the raingarden appear to be in really good shape, although we didn't have a device deep enough to hit the sub-soils area. How long has the raingarden been ponding water after it has been filled up to the overflow elevation? Is the under-drain functioning as intended? Vegetation in the basin & side slopes has some gaps / voids (some species didn't make it) and should be filled in with plants that have proven to establish successfully in these situations (such as the shrubs, sedges, iris, etc.). Shoreland Stabilization / Buffer: Two biofogs appear to have come loose from the bank toe at the north end of the shoreline project. They should be re-staked / anchored. Some planting areas in the shoreland transitional zone have a an uneven distribution of sedges and other strongly-rooting plants. Because of the wave-pressures that will always exist, the transitional area should be planted more densely with more sedges and grasses, among the existing shoreland plantings. The biologs should also be planted (at a 12" spacing) with aquatic/transitional species, such as three-square bulrush, lake sedge, etc. Also, regarding the wave-breaker / floating silt-curtain, it may be a good idea to install something, like a cedar tree revetment along the shoreline in front of the bi%gs in the areas most heavily impacted by wave action / slope degree. The Anoka Conservation District has recently harvested some cedar trees off of a site that was being bulldozed in Blaine. We could transport down some of these cedar trees, but anchors would need to be purchased to secure them in place. I'm attaching a powerpoint fiie with photos from my site visit on 9/14/2007, along with notes on the slides of my observations and suggestions. Overall, I think the project looks nice and seems to be working well - I would just want to hear more on how long the raingarden area has standing water in it after the rain has stopped. Thanks, Gregg Gregg Thompson Urban Conservation Specialist Association of Metropolitan Soil & Water Conservation Districts 16015 Central Avenue NE #103 Ham Lake, MN 55304 (763) 434-2030 x. 15 (763) 286-6985 (cell) metroswcd@isd.net 9/25/2007 ~*. Plaisted ~ .......... '.. Com · .".c. panles .......... IN COR PO RAT ED job 14 070i'8Y P.O. Box 332 11555 205th Avenue N. W. Elk River, Minnesota 55330 763.441.1100 CUSTOMER The cuslo.m&r assumes all responsibility (or damages Ins.lde Iht! curb or property line 10 property or persons. FREIGHT TAX TOTAL DUE GROSS: .3(!i, ..{~~.O((1 I ::j;o i ~~, j r.'~1 I':::: I !t) , i !i.i ;\ j:"; DUMP INST: -.- ---.. ---- _.__.~ --- --- -- - .~- ---- -=-.:-- ~---::--,~ ----:-~.=-.=~~~ -=-- - -- - - --..,..----,-- ::rob -tt a/O/aY :> P.O. Box 332 11555 205th Avenue N.W. Elk River, Minnesota 55330 763.441.1100 . I. DATE . liME CUSTOMER PRODUCT HAULER rfluqK AXLES P.O. 1# (\{:. ~ , ,. (::-1 !.)~_- C' J (~:, ;:-~J ;~-~' n ("I r~; (,'1 VI (~l (i1!ji i~-) D) J c;:i:JSTQ~EflIilAME V~IT g cCJt'W'm.\/ ;::th:Cl~:'r' ND ~ . :Lo,;ld f; The! il Y : '.' qt: y , T ,. ( I <:\}' ; Ph"J.j eel. en ~U~TOMERSIGNATURE . . OTY. UNIT ", PRODUCT PRICE AMOUNT 24.53 YB 60/20/20 RAIN GnRDFN HI iJf:.ltvr"HV [)['R '(m{l) !i ~ l i I If, GROSS: The customer assumes all responslbiHIy lor damages Inside Ihe curb or property Une to property or persons. FREIGHT TAX TOTAL DUE x TARE: NET: '/ '/ DUMP INST: ; I ~ t. t, ~ Plaisted ~ ~~~\'!lR~~~~ - . j~\:) Ft Ole 181 P.O. Box 332 11555 205th Avenue N.W. Elk River, Minnesota 55330 763.441.1100 . DATE TIME CUSTOMER I ". ~ I i I NAME 'In The customer assumes all responsibility lor damages inside the curb or property line to property or persons. FREIQHT TAX TOTAL DUE GROSS: I ; i Ii i 'TARE: ~ 0, f';-tt, (7; i ~>;, ii! ! Ii; il NET: /:. tj"j '~t?l fl- " t:.,~? DUMP INST: Job '# 0'70 )8Y ..' ra. ........... Plaisted -, ~ ....... ...... Companies INCORPORATED P.O. Box 332 11555 205th Avenue N. W. Elk River, Minnesota 55330 763.441.1100 I"" ; j'. I :r :,. DATE TIME CUSTOMER 'PRODUCT HAULER '" ,,'mU~K') AXLES P.O. II ,.,~, . ',)4.,' I / ;~~:Oll? ,"11 ("j ; '{.!\.I J 1f!"',', , L,I. ""+ ~ .' r t(-'tL. :\/. .i-; POSTQM,ER NAME -v...........: ................_.. . _.' \,IE Xl' ,fJ.;' CCifiIPf'rI\\,;' Ot~dl;"'l" no: . Lo.;:~t.l;; f ()(.J .'.j' , In )" T n II ':",;' : " Pi' t).j ~) C) l/ " " 'PRODUCT PRICE AMOUNT (:,l?i/t:~l"/;~:~/.I iFUH N GnF<j)I:i'l "I DhL.11Jr..f'<V P[:Y '((Ifm x The customer sssun\es all responsibility lor damages Inalde the curb or property line to property or persons. FREIGHT TAX TOTAL DUE GROSS: POUNDS . ""V,ic:'\!. TARE: NET: DUM.!' INSI: _ "" Memorandum To: Mark Statz, Jeff McDowell Date: 9/25/2007 Project: Hidden Spring Park From Earth Evans Client: City of Centerville Re: Rain Garden Stormwater Analysis File No: 616-07-155 Remarks: This memo summarizes our stormwater analysis of the Hidden Spring Park project. A chain of treatment measures were constructed for the project including a small rain garden, swale, depression storage and shoreland protection. Post-construction issues with slow drawdown in the rain garden and draintile re-routing led to additional analysis of the stormwater system. Rain Garden Sizing Runoff from the LaMotte Drive storm sewer system discharges into a small rock fore bay then the rain garden. The rain garden functions as the primary water quality treatment feature. It was sized based on Rice Creek Watershed District (RCWD) proposed new rules that require infiltration/biofiltration volume adequate to contain the 0.8-inch event (which exceeds their existing requirement of the runoff from the 0.34-inch event). The rain garden was surveyed to determine what volume is actually available based on constructed elevations. The following table compares the as-built volume and RCWD requirement. Scenario Volume (cf) RCWD Existing Standard (0.34-inch event) 392 RCWD Proposed Rule (0.8-inch event) 1.3 50 As-built Volume (893 contour to the bottom) 1,674 As shown in the table, the volume provided in the rain garden is adequate to meet the RCWD proposed rule if the 893 contour is closed around the entirety of the rain garden. The minimum elevation for the outlet structure is 892.9 to still provide adequate volume to meet the proposed rule. Technically RCWD cannot require conformance to the new rules until they are adopted (likely December 2007), but the site was reviewed based on compliance with the new rules. Overflow Elevation The rain garden was designed with three outlets - draintile, 12-inch outlet structure and overflow to the swale. Due to the clayey soils, draintile was utilized to allow for complete drawdown of the rain garden. The 12-inch outlet structure is the primary outlet and along with the grass overflow is routed to the downstream swale. The purpose of this design is to: . restrict the discharge rates for small storm events via the 12-inch outlet structure . Bonestroo 233S Highway 36 W 51. Paul, MN 55113 Tel 651-636-4600 Fax 651-636-1311 www.bonestroo.com "' · restrict the discharge for larger storm events to the overflow location and therefore minimize erosion As the rain garden is currently constructed the overflow is southwest of the swale through the center of the park. The ground elevation should be raised to force the overflow to the swale. If the existing outlet structure remains as 893.06 elevation, the overflow elevation should be set at 893.6 to contain the 5-year and smaller events in the rain garden. Therefore the ground elevation everywhere else in the rain garden should be approximately 894 and above in order to force the overflow to the swale. Extreme events would not stay localized in the swale, but the majority of storm events would be contained in the rain garden and swale system. If the primary outlet elevation is lowered to 892.9 (the minimum elevation to meet the RCWD proposed rules), then the minimum overflow elevation is 893.5. Draintile As noted above, draintile was provided due to the hydrologic soil group D soils. The rain garden functions more as a biofiltration area then an infiltration area. This method is also allowed in the RCWD Rules. Filtration of larger particles in the engineered soils at the base of the rain garden, uptake in the root structure of the plants and evapotranspiration are the primary means of water quality treatment. There is nominal volume infiltrated, but it was not considered since the soils are dominated by clays. The as-built survey shows that a minimum of one foot of separation is provided between the bottom of the rain garden and the draintile invert. This sand layer acts as a filter system. The compost in this layer allows for growth of the plants. The plants then remove phosphorus, nitrogen and other compounds from the stormwater runoff. The draintile was re-routed to the lower depression, bypassing the swale. The original intent of the design was to route the draintile to the swale. Although the water quality treatment achieved in the swale was never directly accounted for since it is insignificant. Therefore routing the draintile to the swale first would not significantly add to the water quality treatment. A longer, very gradual sloping, vegetated swale functions better for water quality purposes, but conversely can lead to pooling and stagnant water if not graded correctly. _OFOOAr KAT ANOKA COUNTY HIG COUNTY HIGH' N 89'45'20' W 538.22 #~ "'.. tl.LlNE OF GOV'T LOT 1 OF SEC. 23. T3!, R22 ...... ./ I L- 1185'S 3S ., " N.W. COR, SEC. 23- T3lN-R22W ~-- ./ sa.....l PAR "----' " .., \ \ \ (;EN.l.Ef~vrLLE LAKE ;0: !b", VN <Om ~~ o :z !f1E:STVIE' DETAIL C LEGEND SECTIoN LlNE ) QUARTER LINE QUARTER QUARTER LlNE l'ROPl:RTY LINE FLAT BOllNllARY EXlSTlNG RIll UllE RIli PARCEL HUiIBElI TEMPORARY EASalENT RIGHT-oF-WAY IdCtlUllENT PARCEL 1 )I I ~/ . i fellV L- ,I IlENom; PARCEl. tIlMBER 1 I'l>lH1ING TO JND1V1DUAl. , '2 PARCELUUITS BEARING AlIl COORDINATE STfiIICT\lREJ AHOKA COUH'lY PRO..ECT CO<lRD!NATE 5Y51B4 IIAD 83 l19SS ADJQSTED> PAllCEl.. AREAS DEED IS C) 110 0'- Il~ I i=i .::: .,-, 12 ...J~f. ..- -- - ;:--~-:-I . --~.. :',}o. 100 0 ._~..;..-- scale In g~~~~~~~:;. -i a:-! .:......0 14 -" I I ~ 'I __~5 .:. -0___. _()fOO4[ PIAl 'B~~~~-a':1- ANOKA COUNTY HIGHWAY RIGHT -OF~WA Y PLAT NO. 67 COUNTY HIGHWAY PROJECT NO. S.P. 02-614-24 DATA COIITAINED WITHIN THIS BOX FOR IlISTll!.ICTIVE AND IHFOilIIATIGHAL PlIRl'OSES OliIl.Y 1WflT-cF-6Y UI sa:r:tllN J3. 't1l, 1122 N 89''l5'ZO'l! -;;;; DEED RECllIlD TllIlREHS EmtRE EXISTUOl :1CAiE TRACT :r:y SQ. FT. sa. fT. 9188 - IW.Alll:E - "" nw:r ElIP.... RafUftIl/O DATE .5;l. FT. 12-31-09 59 ",., 3 9&1 12-31-09 39 133 2 968 12-31-09. 1285'99 685 12-31--09 27 530 1 16 3156 338 9<l3 1~1-I19 8915 2129 12-31-1l9 5697 2530 12-31-119 9699 6 615 12~1-ll9 49 !123 16 637 6 831 1 937 12-31_ 803 6276 7731 12-31-09 . 238 726 1 172 12-31-09 1818 4 387 12-31-1'9 2413-4 24 285 . 991 -12~31-OS 35 01 301 12-31-09 1 201 1 629 12-31-Q9 . . 205. 12;,..31-09 ..3110 501 1'-31-09 165 501 12-31-09 7.7 136 1'-31-09 31a 1026 12-31-09 11 .41 1705 1.-31-1l!l 10 493 25 12-31-09 1 983 PARtS.. 0llHEll ....llF~~. ~:k'fT 1 ILl!. COR. SEe. Z3-T31N-fl22W N.\I..coR. SEe. Z3- T31N-R2ZW .... 3l:l t""': >- g~ 6~ ~~i ~-- ./ 98'" CENTERVILLE LAKE 182 1 550 2 268 ! 877 33. 222 17a '" "! !!: !:l 7 748 I 10 890 12-31-09- 7738 7 239 744 "12-1-09 700T 15 104 2017 12-81_ 15 9 6 2 129 1901 12~31-D9 4227 100140 7 2,66B 2.704 12-31-09 .. 613 17 58. 12-31-09 17 165 2513 6587 12-31-09 ., 914 . 378 2338 12-31-09 ... 126 384 976 12-31-09 .. 648 28 6S6 2..868 ~." I I: 'Ii~_.. '<!: ::::: .... 11:~1 1-"1 ::~: , I NOTE All poroels shown on thIs plat may not be purchased by Anoko County. Check pert I nent documents for each parae I. . ~ "'0) :fN Ul ' :-~ co.... o z .it. .:':.;" ........ ::~t! tJ./ DET An. C :L I..', ;s-! (::,! :~~. t.,:.1 LEGEND 48 F~F.:V. SECTION I.JNE ) C1JARTER LINE QUARTER CUARTER LINE PROPERTY LINE Fl.A T BOUNDARY EXlSTIt/G RIli I.JNE RIli PARCEl. NUIIlEIl TE!IPORARY EASflISIT RIGHT-of-WAY lIOHUMENT PARCEL 1 I )I 11'2 () ......... I~ C~ 0:: Iz 8 ~i ._~-----I ~ '; '; ~\~. ...... ...~--!. . "x"" . r~~\ ~. 100 0 -~..;..-- "cale In 100/ .i fe.V I .:..... I" -..1 rciiiJi CONSULTING l!J11I GROUP, INC. / / t-": I.... l..; 0:: R=5680.oo I <'':1 . CHORD--"-Nt'54'21'W . g~ L_____ __~_~ .- I I