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Sinnissippi Watershed Assessment
Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Sinnissippi Watershed Assessment Introduction Material presented in the following summary documents current stormwater management and flooding issues for the Sinnissippi Watershed. Information presented is based on a review of available information related to current conditions in the drainage basin. No comprehensive analysis of stormwater management and flooding issues in the watershed has been performed in the last 20 years. Watershed Description Description and Land Use The Sinnissippi watershed is located in the northern part of the City of Rockford on the east side of the Rock River. The watershed drains approximately 1,500 acres at its mouth. 100% of the watershed is located within the City of Rockford. The watershed is compact, with the receiving stream being the Rock River to its West. Watershed Statistics: Sinnissippi Total Area: 1,492 ac. Total Area within City: 1,492 ac. % of City within Watershed: 3.8% Other Stakeholders: None No. of Detention Facilities 0 The Sinnissippi watershed is 100% developed. No. of Outfalls 13 The Sinnissippi watershed contains the heavily commercialized developments on the eastern side of the Rock River that characterize the “downtown” area of Rockford. There are the large, Swedish American Hospital and UIC Medical Center, many office buildings, and commercial storefronts in the western section of the watershed. To the east, Sinnissippi development is dense single-family residential. There is also a cemetery, the Sinnissippi Park Golf Course, a school, some small park and recreation facilities and a railroad located in the watershed. Topography and Soils The topography of the Sinnissippi watershed that of a relatively flat and compact watershed on the East bank of the Rock River. Ground elevations within the watershed range from about 800 feet NAVD near Green Meadow Road to about 700 feet NAVD near the ditch’s confluence with the Rock River. The watershed slope is relatively flat and gradual. SN-1 Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Soils within the Sinnissippi watershed consist primarily of type B soils, with a thin strip of type A soils at the River, and two large pockets of type D soils in the southwestern corner and center of the watershed. Type B soils are soils with moderately low runoff potential when thoroughly wet. Water can be transmitted through these soils without impediment. Type B soils typically have less than 20 percent clay, and between 50 and 90 percent sand with a loamy sand or sandy loam textures. These soils have moderately fine to moderately coarse textures. Type A soils have a high infiltration rate even when very wet. They consist of well-drained sands and gravels, and have less than 10% clay. The runoff potential is low, as water absorbs quickly into these soils. Type D soils are characterized by properties that restrict water movement through the soil. Type D soils typically have greater than 40 percent clay, less than 50 percent sand, and have clayey textures. They have high runoff potential when thoroughly wet.4 The predominance of type B soils in the Sinnissippi watershed should facilitate infiltration of rainfall in pervious areas, thereby contributing to lower runoff volumes and rates than in basins with less pervious soil types. Primary Receiving Stream The Rock River is the receiving stream for the Sinnissippi watershed. The watershed is flat and the gentle slope to the River is the direction of runoff flow. There is a small drainage ditch in the northern section, near UIC Medical Center. Due to the lack of a receiving stream within the watershed itself, there are no impoundments or gauging stations in Sinnissippi. There is no readily available flow data for the Sinnissippi watershed as the watersheds contribution to the Rock River can not be feasibly measured. Given the character of the watershed, flooding within Sinnissippi is primarily caused by pooling due to wet weather events. As shown in Figure SI-1, the floodplain along the Rock River is very small, and along the Sinnissippi boundary, it does not enter any developed area. Records maintained by the Federal Emergency Management Agency (FEMA), indicate that no letters of map revision (LOMRs) have been issued for development projects in the Sinnissippi watershed during the past 30 years. Water Quality and NPDES Discharges SCORE has one storm water collection site, R2, in the Sinnissippi watershed. Table Sn-1 provides metadata for this site. Figure Sn-3 shows the location. 4 Burke, Christopher and Thomas Burke. HERPICC Stormwater Drainage Manual. West Lafayette, Indiana: Purdue Research Foundation, 1994. SN-2 Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Figure Sn-3 SAMPLING SITES SINNISSIPPI WATERSHED, ROCKFORD, ILLINOIS Table Sn-1 SAMPLING SITES SINNISSIPPI WATERSHED, ROCKFORD, ILLINOIS Station Location R2 Station Type Number of Samples (2003-2008) 16 Market Street and Storm water North First Parameters Measured pH, Fecal Coliform, BOD, COD, TSS, TDS, FOG, Hardness, Ammonia-N, NitrateN, TKN, P, Cyanide, Cu, Cd, Zn, Pb, phenol For all water quality parameters; TSS, TDS, BOD, COD, ammonia nitrogen, nitrate nitrogen, total kjeldahl nitrogen, total p, copper, zinc, lead, hardness, and coliform, R2 results show that the concentrations are moderate when compared to the other storm water sampling sites. Table Sn-2 provides the NPDES-permitted point sources in the watershed. SN-3 Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Table Sn-2 NPDES POINT SOURCES LOCATED WITHIN THE SINNISSIPPI WATERSHED ROCKFORD, ILLINOIS NPDES Permit # IL0003697 IL0049107 IL0049344 IL0054640 IL0073059 IL0076864 Facility Name Ingersoll Milling Machine Co. N-D Industries, Inc. Barnes John Corp. Highlander Foods, Inc. Rockford Register Star Harkins Pool Receiving Water Rock River Via Storm Sewer Not listed Rock River Rock River Rock River Not listed Runoff from industrial sites is a potential pollutant source for receiving waters. Table Sn-3 lists eight industrial sites in the Sinnissippi watershed. Table Sn-3 INDUSTRIAL SITES LOCATED WITHIN THE SINNISSIPPI WATERSHED ROCKFORD, ILLINOIS Name Street Land Use Code (LUC) 7991 YMCA Y Blvd. Rock Valley Culligan Madison St. 3950 American Lombardi Olive St. Society Cellusuede Products, Inc. Madison St. 7992 DDCI The Learning Center State St. 1st St. 7334 7990 US Cellular State St. 6512 Swedish American Realty Corp. State St. 6513 2300 SN-4 LUC Description Rcrtn. – Amsnt. Social- Rlgs. w/S-Fac. Miscellaneous Manufacturing (Dry) Clubs & Services Organizations w/Food Apparel & Other Fin. Fabric Prods. Printers Rcrtn. – Amsnt. – Scl. & Flgs. w/o S-Fac. Office Bldg. – Shopping Center Medical Centers Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Existing Drainage Network Drainage within the Sinnissippi watershed occurs through a mix of surface drainage paths and gravity storm sewers. The northern part of the watershed, surface drainage is the primary mode of stormwater conveyance, including the small drainage ditch noted above. The rest of the Sinnissippi watershed is drained by networks of storm sewers as shown in Figure SN-2. Figure SN-2 also shows the general location of identified detention basins and storm sewer outfalls within the Sinnissippi watershed. The Sinnissippi watershed has no identified detention facilities which is expected due to the age of the infrastructure in this watershed, along with the density of development. The 13 identified storm sewer outfalls within the watershed are located scattered in the center of the watershed, with the largest number concentrated along the bank of the Rock River. Available Data Resources Previous Drainage Studies “Drainage Report, UIC College of Medicine.” Arnold Lundgren & Associates, February 2005. Historic Flow Data No source of historic flow data has been identified for the Sinnissippi watershed. Historic Water Quality Data No source of historic water quality data has been identified for the Sinnissippi watershed. (pending input from David Pott) Other Flood Insurance Study: Winnebago County and Incorporated Areas, (FEMA, 2006) Soil Characteristics: “Soil Survey Geographic (SSURGO) database for Winnebago County, Illinois.” Fort Worth: U.S. Department of Agriculture, Natural Resources Conservation Service, 2007. URL:<http://SoilDataMart.nrcs.usda.gov/> SN-5 Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Drainage Issues Table SN-1 (at the end of this section) provides a summary listing of current identified drainage issues and projects within the Sinnissippi watershed. The general locations of these issues and projects are shown on Figure SI-1. The most significant stormwater management/flood control problem in the Sinnissippi Watershed seems to be localized ponding due to inadequate drainage during wet weather events, as well as flooding due to overtopping of clogged or undersized drainage channels. The City is already addressing some flood complaints Parkwood Avenue by restoring the small drainage channel as part of the Neighborhood Plan (#5). In other areas the City needs to look at ways of addressing recurring flooding issues. This may require deepening ditches, scheduling more regular channel maintenance, or installation of a larger, or parallel storm sewer conduit (#1) at Chamberlain and Longwood, where the 96” sewer is backing up. The City also receives ponding complaints from the Sinnissippi watershed in response to major storm events and responds to the best of their ability. Further evaluation of site-specific stormwater management/flood control improvement needs is required to provide a basis for effective planning, budgeting, and prioritization of potential projects. SN-6 Citywide Stormwater Management/Flood Control Assessment City of Rockford Sinnissippi Watershed Table Sn-4 SUMMARY OF STORMWATER/FLOOD CONTROL ISSUES AND PROJECTS SINNISSIPPI WATERSHED, ROCKFORD, ILLINOIS Brief Description of Issue 1 NE of Chamberlain and Longwood Streets - Several blocks are experiencing backyard flooding. This area is currently drained by a 96-inch storm sewer. 2 2nd and Lover Jefferson Streets - Roadway ponding 3 Longwood and Benton Streets - Roadway ponding 4 Parkview Avenue and Spring Creek Road - Intersection is currently experiencing flooding caused by the unnamed ditch overtopping near the intersection of Crabapple Lane. To reduce the frequency of flooding the City is looking to retrofit the detention facility north of the crossing. 5 Parkwood Avenue and Rural Street - Channel restoration between James and Parkwood Avenues. This project is part of the Neighborhood Plan. SN-7 Proposed Project Future Project Maintenance Required Improvements Completed Action Water Quality Impacts Localized/Nuisance Flooding # Major Surface Flooding Over-bank Flooding Issue Type RO SHADY VIST A CER Figure Sn - 1 EL RANCHO EMERSON REBECCA WOOD COOLIDGE HEMLOCK Y MA RA FloodWay WOODLAND 100-yr Floodplain Issue Type PARKSIDE Flooding BLENHEIM MORNINGSIDE Watershed Boundary SHIRLEY HAWTHORNE FAIRVIEW GLENDALE STA Legend TE JORDAN S GLENDALE 29TH 28TH CHA RLE ALPINE MAYFAIR LAUREL SKYLARK SUNRISE TAMARACK HEMLOCK CHELSE A WARREN ROLAND HILTON AL CREST ARDEN GORHAM CHELSEA SCOTTSWOOD STRATFORD WINTHROP LUTHER PALM HARNEY 27TH GE EASTRID MORSAY 29TH 30TH 24TH 23RD 21ST RURAL W KEITH VIE 20TH 22ND IR WREN CRO SBY 29TH VALE HUNTER HOLLISTER OAK KNOLLS VALE CALVIN PARK JAMES ROBERT DAWSON WELTY ROCKFORD 11TH 11TH OLD WOOD KINGS STRATFORD BRADLEY OLD ORCHARD WESTCHESTER GREEN MEADOW PARKWOOD WOODLANE JAMES HIGHVIEW PARKVIEW ROCKFORD ROME ROCKFORD SAINT LOUIS 7TH 19TH LONDON PARIS 18TH 18TH 10TH SHAW WASHINGTON CHICAGO LONDON 9TH Keith Creek BE LVO PETER RAM P S TA TE RA MP JACOBY HIGHLAND HIGHLAND 16TH 17TH 14TH 13TH 8TH 14TH WO OD RU FF 10TH 2ND HUTCHINS 15TH PROSPECT 12TH AD OAK GROVE HIGHCREST ABBOTSFORD 31ST 51 Y2 HW ROCK CLINTON OXFORD PROSPECT SMITH BOHM 12TH WILLIAM REGAN S 10TH 9TH 8TH 7TH 8TH GARDINER GARDINER C REGAN REGAN JOSLYN SUMMIT DAVIS REVELL ADAMS LONGWOOD 7TH 2ND 4TH 6TH RA ILR O 7TH D C RI DG EW OO D 1S T HALL 5TH 6TH KISHWAUKEE 3RD GREGORY LEWIS CUMBERLAND MELROSE DOUGLAS HANCOCK LOGAN TONER LATHAM RA MP RA M P 4T H 2N D 3R D MA Y 3RD 4TH 8TH POPE HARLEM FREMONT LATHAM CHURCH COURT GRANT MA DI 1S SO T N R AR Y SE MIN ROCK BUCHANA N COURT HUFFMAN GR A HASKELL HO VE Y WY MA N WA TE MA IN CH PRICE NO GARRISON RT H NT WINNEBAGO T CO UR UR CH RS MA N HO RT BRUNER RIDGE CARNEY TACOMA HENRY ROCKTON EVERGREEN PAULINE TACOMA GORDON WINNEBAGO WINNEBAGO EDGEMONT GRENSHAW PEACH SH O WEST WEST 3RD 2ND 1ST PINECREST OW VERBLE 2ND DAISY JACKSON IEW BROOKV AY W IR FA Feet 3 CROSBY GREENWOOD OAK BAKER BENTON 5 ME AD CORBRIDGE IN LV CA GRAHA M CATLIN 2 1ST VE D JACKSON 1 SMITH LINCOLN S LA KNOWLTON South Main SALTE R LANE 2,000 COLLEGE BREMER ET GREENWOOD GUILFORD HAWTHORNE K RE E E SID HILL LD FIE EN E R HIC G KO RY EDGEBROOK BUCKINGHAM BURRMONT LUNDVALL OA KE S HARVARD GC ER LIND BUCKINGHAM BARRINGTON BRENDENWOOD BARRINGTON EL B WA LN UT OA K 4 BURRMONT N HI LL PR AIR IE LA FA YE TT E MA RK Spring Creek PELHAM Sinnissippi KENT MONTAGUE O IN SPR ASPEN STARKWEATHER P M RA P M RA BIRCHWOOD ETH OL IV E EL M MP RA EM AL RL HA ION T NA Y IND IAN PA RK ELL IS G LA LEN W N Y FO R LOOMIS EM RL HA GREENMOUNT BLAKE LOOMIS N GA LO ER R GR O MORGAN LE ON CA RL T ILL ES TN UT GR EE N CE DA R RD CH CH ER SO N MU LB ER RY SA LE M A GU JE FF UR CH NA PO W HI TM AN FI SH ER WOODLAWN LOCUST HN CH HORSMAN LEE ACORN O MY ST PO BOILVIN MP OLDS REYN CA KING JO North Main TT ELLIS CAMLIN VIEW Forest Hills ST EA VERNON BRUCE MAPLE Y YONGE SA LE M SCHOOL MULBER R GRACE AUBURN LAPP BLINN Kent Creek BURTON UG DO N TAYLOR QUINCY HARPER IS UR KILB ARLINE CUSTER A CAMELL KNIGHT BROWN RR HA LAWNDALE OW WILL Ü ARCADIA LARSON Proposed Projects City Limits DEMPSTER ROCKFORD TONAWANDA South East Sinnissippi Watershed Flooding Issues City of Rockford, Illinois Autumn 2008 RO SHADY VIST A CER EL RANCHO WOOD COOLIDGE HEMLOCK SUNRISE TAMARACK HEMLOCK SKYLARK LAUREL EMERSON WOODLAND Y MA RA Watershed Boundary SubType PARKSIDE Pipe BLENHEIM MORNINGSIDE " ) Detention SHIRL Outfall ! ( EY HAWTHORNE FAIRVIEW GLENDALE Legend STA TE JORDAN S GLENDALE 29TH 28TH CHA RLE ALPINE MAYFAIR REBECCA ARDEN GORHAM CHELSEA CHELSE A WARREN ROLAND HILTON AL CREST OLD WOOD SCOTTSWOOD STRATFORD WINTHROP LUTHER PALM HARNEY 27TH 24TH 23RD 21ST GE EASTRID MORSAY 20TH 22ND RURAL W KEITH VIE 29TH VALE HUNTER HOLLISTER OAK KNOLLS VALE CALVIN PARK JAMES ROBERT DAWSON WELTY ROCKFORD 11TH 11TH KINGS STRATFORD BRADLEY OLD ORCHARD WESTCHESTER GREEN MEADOW PARKWOOD WOODLANE JAMES HIGHVIEW PARKVIEW ROCKFORD ROME ROCKFORD SAINT LOUIS 19TH LONDON PARIS 18TH 18TH 10TH SHAW WASHINGTON CHICAGO LONDON 16TH 17TH 9TH 7TH IR WREN CRO SBY PETER RAM P S TA TE RA MP JACOBY HIGHLAND HIGHLAND 15TH PROSPECT 14TH 8TH 14TH 8TH WO OD RU FF 10TH 2ND HUTCHINS 13TH AD OAK GROVE BE LVO 31ST 51 Y2 HW ROCK CLINTON OXFORD PROSPECT SMITH BOHM 7TH JACKSON HIGHCREST CORBRIDGE GREENWOOD 2ND 4TH 12TH 10TH 12TH WILLIAM REGAN S ADAMS REVELL 9TH 8TH 7TH GARDINER GARDINER C REGAN REGAN JOSLYN DAVIS SUMMIT LONGWOOD 5TH 1ST HAWTHORNE PINECREST OW ABBOTSFORD 29TH 30TH LEWIS DAISY 6TH RA ILR O 7TH D C RI DG EW OO D 1S T HALL CROSBY 2ND 4TH 6TH KISHWAUKEE POPE CUMBERLAND MELROSE DOUGLAS HANCOCK LOGAN TONER LATHAM RA MP RA M P 4T H 2N D 3R D MA Y 3RD 3RD 8TH GREGORY AR Y BAKER HARLEM FREMONT LATHAM CHURCH COURT GRANT MA DI 1S SO T N R WA TE CATLIN SE MIN ROCK 2ND VE D BENTON 1ST 3RD WEST COURT BUCHANA N Feet HUFFMAN GR A HASKELL HO VE Y WY MA N CH MA IN PRICE NO GARRISON RT H NT WINNEBAGO T CO UR UR CH RS MA N HO RT BRUNER RIDGE CARNEY TACOMA HENRY ROCKTON EVERGREEN TACOMA GORDON WINNEBAGO WINNEBAGO EDGEMONT GRENSHAW PAULINE PEACH SH O WEST GRAHA M COLLEGE BREMER ET ! ( ME AD VERBLE WA LN UT OA K JACKSON LUNDVALL GUILFORD HARVARD IEW BROOKV AY W IR FA ! ( MA RK GREENWOOD ! ( OA KE S OAK LINCOLN E HI LL PR AIR IE LA FA YE TT E BURRMONT IN LV CA 2,000LAN ! ( N SMITH KNOWLTON SALTE R S LA ! ( ! ( KENT MONTAGUE O EL K RE E E SID HILL LD FIE EN E R HIC G KO RY EDGEBROOK BUCKINGHAM BARRINGTON BRENDENWOOD BARRINGTON ETH GC ER LIND BUCKINGHAM BURRMONT Sinnissippi ! ( ! (PELHAM B EL M STARKWEATHER P M RA P M RA ( (! !! ( ! ( OL IV E ! ( MP RA IN SPR ASPEN BIRCHWOOD EM AL RL HA ION T NA Y IND IAN PA RK ELL IS G LA LEN W N Y FO R LOOMIS EM RL HA GREENMOUNT BLAKE LOOMIS N GA LO ER R GR O MORGAN LE ON CA RL T ILL ES TN UT GR EE N CE DA R RD CH CH ER SO N MU LB ER RY SA LE M A GU JE FF UR CH NA PO W HI TM AN FI SH ER WOODLAWN LOCUST HN CH HORSMAN LEE LAPP BLINN JO T OT MY KING ST PO BOILVIN MP OLDS REYN CA ELLIS CAMLIN VIEW ST EA VERNON SA LE M MAPLE Y YONGE AUBURN SCHOOL MULBER R GRACE BRUCE ACORN BURTON UG DO N TAYLOR QUINCY HARPER IS UR KILB ARLINE CUSTER A CAMELL KNIGHT BROWN RR HA LAWNDALE OW WILL Ü ARCADIA LARSON Culvert DEMPSTER GravityMain OpenChannel TONAWANDA Sinnissippi Outfalls, Detention and Storm Sewer Figure Sn - 2 City of Rockford, Illinois Current Data as of Autumn 2008
