(Portland, OR)  --  A major closure of I-5 will happen in June.  ODOT will close four miles of I-5 in southwest Portland from June 28th through July 1st.  The closure is needed to rebuild the bridge over 28th Avenue.  The new bridge is being built under the existing structure, to save time and more than five-million-dollars in construction costs.  I-5 northbound will close from Barbur Boulevard to Terwilliger and southbound I-5 will close from Terwilliger to Capitol Highway.