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Label:
Sewer and stormwater
Label:
Active
Environmental Services constructed a project that installed and upsized public sewer pipes, as well as constructed green street planters, within the Ladd’s Addition neighborhood. These improvements increase sewer capacity, relieve sewer backups, and reduce street flooding.
Construction has been completed.
Project Area
The map below illustrates where this project has constructed sewer improvements, green street planters, and new ADA ramps. The map also shows the methods of construction.
General Schedule
Work hours are from 7 a.m. to 6 p.m., Monday through Fridays, with work possible on Saturdays if needed. The city’s contractor, Landis & Landis will provide advance notice at least 5 to 10 days to adjacent properties before construction begins at each work zone.
Green Street Retrofits
Green street planters are intended to fill up with water when it rains, then overflow back into stormdrains once they are full. They are designed to slowly drain water down into the soil. When the plants are more established, the green streets will drain faster. In Ladd's Addition, we have discovered that there are more compacted and clay-like soil layers that are not allowing some of the facilities to drain as fast as they should be if at all. When a green street appears to be slow draining, as we are seeing in some of the newly constructed green streets, we gather additional information and determine whether corrective measures are needed to address the issue.
In November 2023, Environmental Services investigated several locations and determined that seven (7) of the green streets that were either not draining or draining too slowly. These planters have been revised/retrofitted. The seven green street planters as seen on the map below were drained, saturated soils were removed as needed, one or two 8-inch diameter perforated PVC pipes were inserted at various depths, and then backfilled with a 1/4-inch rock. The depths of the perforated pipe vary from 8 to 17 feet depending on the depth of the sandy gravel reached. The green street planters will be monitored by staff.
The seven green street planters that have been retrofitted are located:
- SE Tamarack Ave between SE Lavender and Division
- SE Lavender St east of SE Tamarack Ave
- SE Tamarack Ave northwest of SE Lavender St
- SE 16th Ave south of SE 16th Ave
- (Two) SE Ladd Ave north of SE Lavender
- SE Larch Ave south of SE Mulberry Ave
UPDATE MAY 2024: Some of the green street planters are draining slowly at this time, but one is barely draining at all and Environmental Services is working on a solution for the planter that is still full of water on SE Tamarack north of Lavender.
We Want to Hear From You
Please let us know if you have any questions regarding the sewer pipes or green street planters. Be sure to include your name, property address, and project name (Ladd’s Addition) in your voicemail and email so we can provide you more details about what to expect in front of your property. Also, please write “Ladd’s Addition” in the subject line of your email.
Project Background
The purpose of this project is to relieve basement sewer backup risk, reduce street flooding, and overall risk to the large sewer trunk in the project area. To that end, this project will upsize or repair portions of the public sewer main line to increase its capacity to handle combined sewer and stormwater. It will also build green street planters that help slow, filter, and cleanse stormwater from the streets.
The project is designed to accomplish the following sewer and stormwater improvements:
- Relieve basement sewer backups at 59 properties.
- Replace or repair 3,500 feet of public sewer mainline pipe, ranging in size from 8 inches to 14 inches in diameter.
- Construct 15 green street planters.
- Construct or replace 9 sewer connections that connect private sewer lines to the public sewer in the street; this will involve 300 feet of lateral sewer pipe.
- Construct or replace 15 maintenance holes.
- Replace 6 stormdrains and construct 336 feet of stormdrain pipe.
- Construct 11 ADA ramps.
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This project will help protect the health of the Willamette River Watershed.