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HomeMy WebLinkAboutMinutes - 10/13/1999 - Public Works Committee PLtblic Works Committee Meeting � Minutes October 13, 1999 Present: Chairperson Alderman Bolger, Alderman Glab Alderman Ba.ird at 6:05 p.m. Others Present: Mayor Cuda, City Clerk Althoff, Alderman Murgatroyd, City Administrator Lobaito, Assistant Administrator Maxeiner, Director of Public Works Batt, Community Development Director Napolitano, City Inspector Marcinko, Streets Superintendent Stull, City Engineer Baxter and Woodman Representatives William Blecki and Carl Moon (arrived at 7:07 p.m.) Alderman McClatchey arrived at 6:45 p.m. Public Works Chairperson Alderman Bolger called the meeting to order at 6:00 p.m. He stated the purpose of the committee meeting was to discuss the June 13+�flooding and related sanitary sewer backup problems. City Engineering Firm Baxter and Woadman were authorized at the July 28, 1999 regularly sche.duled council meeting to conduct an engineering study on the Anne Street, Edgebrook School and McHenxy Country Club areas drainage system. Baxter and Woadman representatives Carl Moon and William Blecki were in attendance to review the study's findings and answer any questions the committee may have. Alderman Bolger opined the following action should be taken: � -secure easements from the Union Pacific railroad tracks to the Fox River to develop a drainage path -obtain authority over the McHenry Counhy Club Dam (weir) which traverses John Street -utilize the culvert under Green Street to assist the drainage of McCracken Field -clean all retention basins in this area of silt and debris -undertake ditch improvements for Grove and Ann Streets -initiate development of the regional detention basin on the Route 31 and Bull Valley Road Pacini property -construct a culvert on the city's Kane Street Avenue right-of-way through the Edgebrook School's property. Director of Public Works Batt noted city engineering firm Baxter and Woodman were contracted to study only the Fox Culvert from Route 31 up to and including Anne Street. He noted although the study recommends a solution it does not negate the need for a regi.onal detention basin. The study reveals existing drainage construction, even with the development of a regional detention basin, is not adequate to handle a 10-year storm intensity. Baxter and Woodman representa,tive William Blecki addressed the committee. He noted the drainage engineering report was not a finished document, but an on-going work in progress. The area analyzed incorporated a 2.7-mile area including the drainage tributary. The study reveals mosfi of the drainage area is �. located west of Route 120 validating the need for a regional detention facility. Public Works Committee Minutes � October 13, 1999 Page'I�vo Mr. Blecki explained the term "storm intensit�', specifically references to a 10- year storm or 100-year storm. Engineers refer to designs as being able to handle storm events equal to 10, 25, 50 and 100-year storm intensity. The statistical analysis to determine storm intensities is an every changing variable due to new, available and improved data. As the new data is compiled design standards will chan�e. The cunent statewide average for a 24-hour period is 7.6". Mr. Blecki also noted only a 1% chance in any 1-year period will produce a rainfall intensity equal to the 100-year storm intensity statistic. However as many variables can impact these sta.tistics the 100-year starm intensity can occur over and over. Mr. Blecki stated Baxter and Woodman utilized the same storm data as that of FEMA (Federal Emergency Management Agency) and that of a 100-year and 10- year storm intensity when calibrating the engineering model to e�sting conditions. It was determined current conditions can not handle a 10-year storm intensity, nor, perhaps, a 2-year storm intensity. One specific problem the engineering study identified was signif'icant starmwater restriction due to frequent kinks and bends in the draina�e pathway. In addition the drainage channel is both too shallow and narrow. �, Recommendations are based on the analysis of various improvement combinations as well as obtaining the most reasonable level of pratection for the cost. Faur alternatives were identified as potential solutions to the flooding problem: 1. Install a second underground culvert 2. Improve the existing creek channel north of Anne 3treet 3. Combine ditch improvements and culvert additions 4. Additional improvements including replacement of the culvert located between 3812 and 3814 Anne Street and replacement of the control weir at the east end of the golf course pond across John Street. 1] The installation of a second underground culvert would begin approximately 100 ft. upstream of the existing culvert and continue along the southern edge of the Edgebrook School properry, under Green Setout and behind the residenfiial properties on the east side of Green Street to discharge into the golf course creek. 2J The Anne Street channel should be redesigned to a wider, deeper and more uniform slope. 3] Gombining ditch unprovements (at the 50-foot wide capacity) with an additional culvert will be able to convey a 25-year storm intensity. Mr. Blecki noted with improvement number three the 50% chance of � stormwater flooding would be decreased to a 10% chance. He also noted as Public Works Committee Minutes � October 13, 1999 Page Three Baxter anci Woodman used very conservative data figures to develop a conservative conditions model, protection levels would be higher than the projected 25-year storm figure. Mr. Blecki also stated the study model revealed no floodin�increase once the stormwater reached the golf course footbridge. Therefore no real improvements were recommended for this specific area and existing structures along the creek will not be an increased risk. Upstream improvements may cause some increase in velocity however and erosion control improvements will need to be incorporated downstream of Green Street on the golf course. Erosion control improvements will mirim;�.� impacts resulting from increases in flow rate and velocity. Director of Public Works Batt recommended support of the 10-year stormwater conditions model. He stated it was an excellent first phase in a two-phase correction model. Phase two would be the development and construction of a regional detention basin. In response to Alderman Bolger's inquiry regarding flood relief for McCracken Field, Mr. Bleclfl noted the culvert under Green Street at Kane can convey stormwater flows up to the 50-year storm intensity. � It was also noted drainage improvements would assist and benefit properties located West of Route 31 including the First Baptist Church. In response to Alderman Bolger's comment, Director of Public Works Batt reported the Public Works Street Division identified and installed seal down covers on the following manholes: 3901, 3905 Anne Street 3005 Miller Drive Kane Avenue Edgebrook School sidewalk area Anne and Dale intersection Riverside and Elm intersection 4806, 4906, 5103, 5215, 5412, 5424, 5520 Shore Drive 2002 Sherman Drive 5301 Shore Hill 4805, 4903, 5220, 5300 Willow North Avenue and Flower Street intersection 5217, 5219, 5303, 5311 Home Street 1820, 1912, 1916 Sunset 1710, 1814 Parklane Avenue Route 120 and Parklane Avenue intersection 1704 Lakewood 5116, 5306, 5220 Route 120 `.,, 4819, 490'7, 4817, 4919, 5011 Prairie Public Wa�ks Committee Minutes � October 1:3, 1999 Page Four 1621, 1905 Knoll 1906 Highview 4917 Highview at Commercial intersection 1606, 1716 Pleasant 4811, 4819, 490'7 Commercial Commercial and Meadow intersection 1606 I2amble 1518 Flower all rnanholes behind the Village Squire Resta.urant on Route 120 Alderman G1ab inquired as to the impact, if any, from development on the upstream drainage flow. Mr. Blecki noted recent development has improved drainage conditions as newer and better design criteria has been, and continues to be, developed and city ordinances now require drainage improvements on newly developed property. City Administrator Lobaito also explained when the stormwater draina�e for this area was originally designed the then current 100-year storm data.was used. Under today's standards the stormwater release rate is equivalent to a 10-year event. As additional development occurs the affected surface becomes more impervious causing a more rapid water flow and an appearance of faster � flooding. He also reminded the comxnittee stormwater management is only 30- years old. Cha.irperson Alderman Bolger recognized City of McHenry resident Debra Karlsen in the audience. Ms. Karlsen requested clarification regarding a newspaper account regarding the City of Crystal Lake discharging raw sewage directly into the Fox River on June 13+� and a statement the IEPA permits this action in the event of an emergency. Baxter and Woodman representative Carl Moon opined the IEPA would not approve the discharge of raw sewage, it was his understanding the sewage Crystal Lake discharged had been througkl phase two of a four phase processing sequence. Under this particular circumstances the IEPA would permit a discharge. McHenry's situation wa.s not similar. In response to Ms. Karlsen's inquiry regarding the feasibility of installing additional pipes east and west of her property to assist stormwater drainage, Mr. Moon noted the three existing culverts should be adequate to handle the stormwater drainage. He noted as the Karlsen property is the lowest point in this area the water natural drains to this location first. In response to Ms. Karlsen's inquiry regarding the initiation of correction measures and a subsequent completion date, staff noted full council had not yet eonsidered specific action. Some discussion followed. � Public Works Committee Minutes � October 13, 1999 Page Five OVERHEAD SEWER PR�RAM/ORDINANCE Public Works Director Batt noted as per previous discussion and direction at the July 218t Public Works Committee Meeting a copy of the Village of Barrington's ordinance establishing the overhead sewer installation program was obtained for committee review and consideration. A copy of the program was obtained as well. The program was designed for residents who repeatedly experienced major flood.ing problems in their homes when heavy rains occur. Director Batt noted inflow devices would not be successful in localized neighborhood prablem areas. Installation of a check valve would be an alternative solution, however the valve does require significant maintenance. The best solution would be installation of overhead sewers. It is the recommendation of staf�'to initiate a 50/50 cost-sharing program for the installation of overhead sewers with a maximum limit of$2,500 per home. Some discussion followed. In response to committee inquuy Director Batt noted an application pracess would be developed and managed by the Public Works Department. The program would atso require verification of cost with an invoice presentation. Chairperson Alderman Bolger requested the program permit homeowners who � have recently installed overhead sewers within a specified time period be allowed to participate. Alderman Ba.ird sta.ted his strong support for the program. Alderman Glab expressed reservations regarding the 50/50 cost share aspect. He suggested a special assessment or special services area be created. He cited current budget constraints relating to the abundance of on going and proposed city infrastructure and parks projects. Alderman Bolger noted the Lakeland Park dzaina�e project corrected only surface stormwater and council did not support the development of a special assessment or services area. In response to Alderman Baird's inquuy, Community Development Director Napolitano reported the ordinance would require the installation of overhead sewers in all new residential construction meeting specific stated criteria. Determination would be rnade during the plan review process. Director Batt informed the committee installation of overhead sewers in new homes is significantly less costty than the installation of overhead sewers in existing homes. Staff estimates the cost for overhead sewer installation for new homes at approximately$1200/home and for existing structures at $5000/home. Further discussion followed. It was the consensus of the committee to recommend $25,000 be allocated for � this pragram during the 1999-2000 fiscal year. Public Works Committee Minutes � October 13, 1999 Page Six In response to committee inquiry staff noted the Village of Wauconda has a similar program and during the first year of its inception, only two residents applied and obtained overhead sewers. Director Batt also informed the committee, as per council direction, sandbags have been made available at the City Garage on Green Street and at Water Plant#2 at the end of Beach Road. Four hundxed sandbags are available in addition to 2.5 yards of fill. Directional signage is also in place. Director Batt reminded the committee several other issues rema.in unresolved, specifically stormwater flooding in the McHenry Shores axea. The Public Works Department has sealed designated manholes in this area in conjunction with those sealed in the Anne Street area. He also reooxnmended the committee consider reviewing the ditch work along Bull Valley Road and area culverts. Some of these culverts have been modified by property owners which ma.y add to the overall drainage problem. He suggested city engineering firm, Baxter and Woodman be hired to review the culverts and ditches. Chairperson Alderman Bolger requested the Pacini's land planrier be contacted. He recommended dialogue be uutiated regardin�an area retention pond. � Motion by Baird, seconded by Bolger, to recommend to full council the initiation of a 50/50 cost sharing program for the installation of overhead sewers with a maximum limit of$2,500 per home and to allocate $25,000 within the 1999- 2000 budget for this program. Voting Aye: Baird, Bolger Voting Nay: Glab Motion carried. Alderman Glab a�ain e�cpressed reservation with the program, citing the City's participation in increasing the value of spe�c residential homes. Motion by Baird, seconded by Bolger to adjourn at 7:25 p.m. Voting Aye: Baird, Bolger, Glab Voting Nay: None Absent: None Motion carried. C�(J � Chairperson William Bol r �