Local officials say they will be working to make sure existing benchmarks are accurate. Use these as a guide, but officials say it’s important to “know your number.”

Flood stage is 35 feet, moderate flood stage is considered 38 feet and major flood stage is considered 40 feet by the National Weather Service.

Ohio River Benchmarks:

• During a flood, benchmarks are the point at which an area goes underwater.

Marietta

East side benchmarks

32.6 feet: Hart Street at Eighth Street

33.2: Charles Street at Eighth Street

33.5: Hart Street at Sixth Street

34.2: Charles Street at Sixth Street

34.5: Ohio Street at Fourth Street

34.6: Wayne Street at Sixth Street

34.7: Charles Street at alley between Sixth and Seventh streets

34.9: Fifth Street at center of Don Drumm Field

35.0: Flood stage

35.5: Stark Street at Seventh Street

35.8: Pike Street at Wayne Street

35.8: Greene Street at center of Don Drumm Field

36.0: Basement of Lafayette Hotel

36.0: Pike Street at Elmwood Avenue

36.3: Pike Street at entrance to Phillips Elementary School

36.5: Ohio Street at Eighth Street

36.7: Third Street, between Greene and Butler streets

36.8: Stark Street at Eighth Street

36.9: Pike Street at Hart Street

36.9: Second Street, between Greene and Butler streets

37.0: Hart Street at Ash Avenue

37.1: Hart Street at Fourth Street

37.2: Stark Street at Seventh Street

37.2: Fourth Street at Butler Street

37.3: Second Street at Church Street

37.3: Third Street at Church Street

37.3: Jefferson Street at Seventh Street

37.4: Pike Street at Olney Street

37.5: End of East Eighth Street

37.6: Lafayette Street at East Eighth Street

37.6: Wayne Street at Eighth Street

37.7: Charles Street at Sixth Street

37.8: Greene Street at Fifth Street

37.9: Greene Street at Sixth Street

38.1: Elmwood Avenue at Ash Avenue

38.2: Hart Street at Seventh Street

38.26: Pike Street at Seventh Street

38.3: Charles Street at Seventh Street

38.3: Church Street at Second Street

38.6: Butler Street at Fifth Street

38.9: Ohio Street at Second Street

38.9: Ohio Street at Third Street

39.0: Pike Street at Lafayette Street

39.1: Greene Street at Fourth Street

39.1: Hart Street at Meigs Street

39.1: Pennsylvania Avenue at Lincoln Avenue catch basin

39.1: Pike Street at Court Street

39.3: Jefferson Street at East Eighth Street

39.7: Third Street at Butler Street

39.7: Greene Street at Third Street

39.7: Third Street, between Butler and Church streets

39.8: Second Street at Wooster Street

40.0: 10-year flood level

40.1: Wayne Street at Eighth Street

40.13: Greene Street at Seventh Street

40.3: Front Street at Monroe Street

40.3: Pennsylvania Avenue at Linwood Avenue

40.4: Front Street at armory

40.5: Pike Street at Greene Street

40.5: Greene Street at Second Street

40.5: Third Street at Scammel Street

40.6: Second Street at Scammel Street

40.7: Pennsylvania Avenue at Eton Avenue

40.9: Second Street at Butler Street

41.3: Southeast corner, Butler and Front streets

41.4: Front Street at Fair Avenue

41.5: Front Street at Ohio Street

41.65: Greene Street at Front Street

41.7: Adventure Galley at Second and Butler streets

41.8: Elmwood Avenue at Buckeye Avenue

41.9 Hart Street at Fifth Street

41.9: Front Street at Knox Street

42.09: Front Street at Putnam Street

42.1: Lower corner, Front and Butler streets

42.3: Front Street at Wooster Street

42.3: Front Street at St. Clair Street

42.3: Second Street, between Putnam and Butler streets

42.6: Colegate Drive at Muskingum Drive

42.6: Alley off Wooster Street, east of Front

42.7: Front Street at Washington Street

42.7: Elks Lodge on Front Street

42.7: Front Street at Butler Street

42.8: Second Street, between Putnam and Scammel streets

43.3: Butler Street at Seventh Street

43.4: Second Street at Union Street

43.75: 25-year flood level

43.8: Front Street at Lower Sacra Via

43.9: Front Street at Upper Sacra Via

43.9: Hart Street at Buckeye Avenue

44.0: Lobby of Lafayette Hotel

42.09: Front Street at Putnam

West side benchmarks:

33.2: Mile Run underpass

33.51: Gilman Avenue at lower ramp to Washington Street Bridge

34.4: Gilman Avenue at New Street

34.9: Virginia Street at Franklin Street

35.0: Flood stage

35.5: Virginia Street at Brown1s Alley

35.9: Gilman Avenue at Wood Street

36.1: Virginia Street at Ward Street

36.3: Virginia Street at Fearing Street

36.4: Virginia Street at Square culvert

36.6: Virginia Street at Gilman Avenue

36.6: Virginia Street at Harmar Street

36.62: Gilman Avenue at upper ramp to Washington Street Bridge

37.1: Gilman Avenue at Lancaster Street

38.9: Fort Street at railroad overpass

38.9: Maple Street at Fort Square

39.7: Gilman Avenue at Market Street

40.0: 10-year flood level

40.1: Harmar Street at Maple Street

40.5: Harmar Street at Pearl Street

40.9: Market Street at Fort Square

41.7: Market Street at Franklin Street

41.9: Gilman Avenue at Maple Street

41.9: Gilman Avenue at Groves Avenue

42.3: Franklin Street at Maple Street

42.4: Maple Street at Crawford Street

42.4: Gilman Avenue at Lot 325

42.7: Gilman Avenue at railroad crossing

42.8: Harmar Street at Market Street

42.8: Harmar Street at Clinton Street

43.2: Franklin Street at Lord Street

43.4: Putnam Avenue at Franklin Street

43.7: Harmar Street at railroad crossing

43.7: Gilman Avenue at Putnam Avenue

43.75: 25-year flood level

44.4: Gilman Avenue at Westview Avenue

Belpre benchmarks

35.1 feet: John at Walnut

36.0: Flood stage

38.6: Scott and Walnut

40.7: Sixth and Barcley

40.9: Main and Blennerhassett

41.0: Ohio 618 closed at Shell Plant

41.5: Campus Drive below Depot

42.0: Blennerhassett and Stone, Wirt and Congress Creek Road, Stone Avenue and Seventh

42.5: Elm and Blennerhassett

42.6: Walnut and Blennerhassett

42.8: Walnut and Sixth

42.9: Scott and Elm

45.0: Belpre Auto Parts 1¸4 Washington Boulevard

45.7: Florence and Washington Boulevard

46.0: Main and Matheny

47.6: Fifth and O’Neal