CEDAR FALLS COMPREHENSIVE PLAN SANITARY SEWER SYSTEM


The Cedar Falls sanitary sewer system is analyzed in two parts: wastewater collec- tion and conveyance, and wastewater treatment. Figure 6.1 shows the location of Cedar Falls sanitary sewer lines and access points.


WASTEWATER COLLECTION AND CONVEYANCE


OVERVIEW Wastewater lines range in size from 6” to 42” and are primarily made of clay (80-85%) with approximately 15-20% concrete and truss lines. The oldest lines are from 1st


- 12th


Street and Grove to College. The service area is 28.9 square miles (within city limits). There are no combined storm water and sanitary sewer lines.


EVALUATION • Condition: Fair to Good


• Mains: Over 21 miles of old lines have been rehabilitated with cured liners. Over 110 spot repairs of bad lines have been made over the past 10 years.


• Aging and poor installation are an issue in some areas


RECOMMENDATIONS • Some trunk lines need rehabilitation • Resolve inflow/infiltration problems


LIFT STATIONS


In parts of town where wastewater cannot be conveyed to the treatment plant by gravity, such as in hilly areas, lift stations are installed. Table 6.1 outlines the loca- tion, condition, capacity and issues for each lift station.


Table 6.1 - Sani t ary Sewer Li ft St at ions, Over v iew and Evaluat ion Station Location


Condition 112 Logan 1500 Bluff Street


2100 Block of Parrish 3129 Cottonwood Lane 7719 Ace Place 605 Center Street 1301 Lake Street


2000 Block of Timber Drive 2209 Park Drive


Foxview Subdivision 5602 Prairie Street


92 Good to Excellent


Fair; Rehabilitated after 2008 flood


Fair


Excellent; New Excellent


Excellent; New Excellent; New Fair to Good


Fair


Good Good


Capacity


Good; stand-by power available Stand-by power available Sufficient


Good Good


Standby power available Ample


Sufficient


Insufficient Sufficient


Ample; Stanby power available


Issues/Needs Located in flood zone


Subject to flooding; Expand to meet future needs and flood protection (construction underway on replacement station)


Single pump operation -


Connect to city water when it becomes available - -


Age, built in 1950s


Can’t handle wet weather flows; Increased capacity or reduction of inflow is needed (study underway)


Temporary use until gravity sewers are extended to this area


Connect to city water when becomes available; subject to flooding from nearby creek.


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