Agenda - Council - 10/13/2026 - Laserfiche WebLink

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Engineering & Planning Guidance I Cul-de-Sac Length, Connectivity & Access PUEBLO COUNTY — Engineering standard: 660-foot maximum, no more than 20 single-family dwellings, and no more than 200 daily trips for other uses. ASCE / ITE-BASED 500-FOOT STANDARD — Sherwood uses a 500-foot residential maximum and ties its calculation to Residential Streets, 3rd Edition, developed with ASCE and ITE. MINNESOTA — MnDOT — Fragmented street systems can impede emergency access; local subdivision regulations should promote network connectivity. MINNESOTA — MPCA / MIDS — Model guidance treats cul-de-sacs over 500 feet as requiring additional justification/conditions involving utility looping, speed/backtracking, service -vehicle turning, adjacent connectivity and possible secondary access based on emergency routes, obstruction risk and dwellings served. MINNESOTA — EQB + MPCA SITE DESIGN — Model guidance describes low -volume residential access lanes as generally serving 25 or fewer homes / under 250 ADT. Minnesota site -design guidance recommends reducing total residential street length, increasing homes served per unit length and minimizing residential cul-de-sacs. CONGRESS FOR THE NEW URBANISM — CONNECTIVITY -ORIENTED GUIDANCE CNU highlights the research report Planning for Street Connectivity, which found typical block -length requirements of 300-600 feet and reported that cul-de-sacs were usually restricted to approximately 200-300 feet and allowed mainly where connections were impractical. CNU's Sustainable Street Network Principles emphasize route choice and connected networks. The CNU/USGBC/NRDC LEED-ND framework also uses approximately 400-foot connection intervals at project boundaries and calls for pedestrian/bicycle through -connections in at least 90% of new cul-de-sacs, subject to physical constraints. WHAT CNU ADDS CNU does not establish a universal engineering maximum for cul-de-sacs. It shows that prominent connectivity -oriented planning literature is often more restrictive than Ramsey's 600-foot benchmark and treats cul-de-sacs as exceptions where network connections are impractical. Ramsey's 600-foot standard therefore should not be characterized as unusually restrictive merely because modern planning values flexibility. NATIONAL RELEVANCE — AND MINNESOTA CONDITIONS These benchmarks appear across different U.S. climates, including places without Minnesota's snow accumulation, snow -storage demands and freeze -thaw environment. The underlying rationale is broader than winter maintenance: speed, traffic concentration, connectivity, emergency access, homes served, service -vehicle operation and infrastructure efficiency. Minnesota's climate can add another operational layer because more roadway means more pavement to plow, maintain and manage through winter. WHY IT MATTERS FOR RAMSEY Ramsey's 600-foot benchmark sits within a broader engineeringldesign pattern in which ordinary residential dead ends are limited and longer single -access streets receive additional scrutiny. Minnesota -specific guidance independently supports the same concerns and uses 500 feet as a point at which additional model conditions apply. Source framing: CNU material is planning/connectivity guidance, not a Minnesota legal requirement or proof that 200, 300, 500 or 600 feet is universally optimal. Law. States / Si In/_ Minnpcnta MIns Cnmmunih, Accictanne Parkanp jvl nDOT Arcpcc Mananpmpnt Manila! III 1 — Methods of renuirinn rnnnertivih, differ / Planninn for Street Cnnnertiuit, III 1 — Suctainahlp Strppt Nptwnrk PrinrinIpc CNN / LEED-ND — Street Network credit October 13, 2026 1 Engineering, planning & connectivity guidance