3721 OAKES AVE EVERETT MEMORIAL STADIUM 2018-12-21

IFjenginee The site topography of the field is relatively flat,sloping from southwest to northeast at an approximate 1.6%grade.North of the field,topography follows the road slope of 38th Street, sloping west to east at about 2%.To the east of the field, outside of the field footprint,there are steeper slopes of about 20%. Based upon the Natural Resources Conservation Service(NRCS)web soil survey map,the site soils within the project area consist mainly of Urban Land(fill). Refer to Figure 2—Soils Map for more information. MINIMUM REQUIREMENTS According to the City of Everett SWMM,a"redevelopment"is defined as a project site that has 35%or more of existing impervious coverage.The existing impervious surface coverage for the project area was delineated within AutoCAD using an aerial image for the property. Impervious surfaces included existing building roof areas,all paved surfaces,track surfacing,and bleacher areas. Refer to Figure 3—Existing Impervious Coverage. The existing impervious coverage for the total site was determined to be approximately 63.7%. Thus,the project is considered to be a redevelopment. Figures 2.1 and 2.2 were used to determine the minimum requirements applicable to the proposed project. Figure 2.1 from the Everett SWMM Start Here Does the project have 5.000 square feet or ore of new.epaceo —� See Minimum Requirement R0 w pus repacm pollutant generating Yes impervious surfaca7 No Next Question • Doeps the project r convert 3f4 acres or pops the eject have Dee'the bled add mere of rmtve 2 OOrt square feet or So000 square feet -y vegetatron to lawn or more of new rumore r more at new landscaped areas o replaced or new plus nit» No convert 2.5 acres or No replaced imrenion= more of sauna vegetation to pasture, yes Yes Yes No _ 're project Sec See Mr disturbing Re4 r: Requirerr -t.r:' + rhrtes of 7.000 tirroo.jli u= Ihrox ..:j feel or Yes more, • No See Minimum Requirement k2 Figure 2.1 Flim('hart for Determining Rcquircman%for New Develupmenl and Redevelopment LPD Engineering, PLLC Page 2 Everett Memorial Stadium Baseball Field Replacement Storm Drainage Report, September 15, 2011