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2022 Existing MS4 Permit Area Maps · Drainage Basin Map; PDF · El Paso County Engineering Criteria Manual · El Paso County Drainage Criteria Manual. Windmill Gulch Drainage Basin Planning Study in El Paso County, Utilize the City of Colorado Springs/El Paso County Drainage Criteria Manual as well as. El Paso County Engineering Criteria Manual · El Paso County Drainage Criteria Manual · El Paso County Major Transportation Corridors Plan (MTCP) · Urban Drainage Drainage Criteria Manual Publication Online content updated on October 31, 2018 This Code of Ordinances and/or any other documents that appear Design for open channels, culverts, ponds, and storm sewers shall be in accordance with the Colorado Springs/El Paso County Drainage Criteria Manual, Project , Chaffee , El Paso , Fremont , and Pueblo Counties , Colorado . City of Colorado Springs / El Paso County Drainage Criteria Manual .concrete to be cdot cl. drainage criteria manual volume 1. filed in accordance with the requirements of the el paso county land development code, drainage performed in accordance with the permit, the El Paso County Engineering Criteria Manual (ECM) Standards,. City of Colorado Springs Drainage Criteria Manual, 12.12Standards of Areas of Shallow Flooding (AO and AH Zones) . design manuals for arid counties with soil types and topography similar to El Paso.