Why infill must be planned carefully and approved only when truly feasible

Please click on images to see lot where two houses are being built under Neighborhood Conservation rules where one had stood before.
Questions: Where is the silt fence? Where will stormwater be retained? Who will pay to dig the silt out of the Spout Spring Branch less than a block downhill to the south? Are any of the few remaining trees on the lot expected to be saved? Will any of them survive having their roots being cut and buried? Can neighbors downstream sue if their homes are flooded for the first time after this project is completed? How will this project affect the "property value" of downstream riparian zone existing houses? If the city ever develops and passes an ordinance to protect our stream corridors, will such intense development be outlawed so close to a stream's riparian zone?
Did city staff members discuss these or other potential problems with the sloping lot before approving the project?
Just asking. I didn't follow the approval process for this raze, removal, grading and construction plan.
As a use by right in the Neighborhood Conservation zone, it didn't get much public scrutiny.
Large or small, conditions of approval for every development site must be fully thought out and the inspected daily before such problems can develop.