A sewage spill that federal officials said started Monday night south of the border continues to flood the Tijuana River with millions of gallons of raw effluent. A ruptured collector pipe in southeast Tijuana is leaking roughly 7 million gallons a day of sewage into the river, according to the U.S. section of the International Boundary and Water Commission. The IBWC said utility officials in Baja would attempt to divert the flows Wednesday from the Tijuana River back into CESPT’s wastewater treatment system.