Schoel Engineering expected to have the final report to the city by the end of 2021. As of April 1, 2021 the report has not been posted by the city. The reports are available on the Hoover Website as of the end of April; http://www.hooveral.org/1199/Drainage-Assessment-Reports as follows:
Creekview drainage Linda Avenue Mockingbird Lane Napier Drainage Assessment
Rockview Lane Drainage Assessment Star Lake Drainage Assessment Whispering Pines Drainage Assessment
Green Valley Bluff Park Drainage Study by Schoel Engineering presented November 18, 2021
Major Points From the Green Valley Drainage Study by Schoel Engineering
As presented on November 18, 2021
Napier Drive (slide 11)
Culvert damage (needs 42 inch relief culvert and new headwall)
· Slide 15 Remove rock and sediment in upstream channel
Paulette Drive (slide 20)
· Flume and Driveway culvert undersized
· Inadequate culvert capacity
Mockingbird Lane
· Ditches were cleaned
· Add 54” RCP
Star Lake
· Large debris and sediment filling lower half of pipe remove debris (on city property)
· Overtops between 5 and 10 year event
· Add additional barrel and lower pool by 1 foot (optional)
Whispering Pines
· Overflooding through Plaza on 10 year event
· Overtops road on one year event
· Culverts reduce from 36 to 30 inch pipe replace with 2 8 by 4 foot culverts
Linda Ave
· Overtops road at 10 year event
· Significant band erosion
· Add a culvert
· Stabilize bank
Rockview Lane
· Overtops the road at 5 year event
· Excess runoff goes north
· Floods residences on 10 year event
· Sharp bend in channel has significant debris
· Replace culverts with 2 58 by 36 inch arch culverts
· Add wall/berm to prevent overtopping at ditch and driveway
· Improve channel for flow
The 2020 Storm Water Management Plan explains the role of the city in stormwater as follows “needs in the City include, but are not limited to protection of the public health, safety, and welfare of the community. Provision of storm water management services under the SWMP renders and/or results in both a service and a benefit to all properties, property owners, business, citizens, and residents of the City in a variety of ways even though the benefits may be indirect or immeasurable.”
At the November 18 special meeting, City Attorney Phillip Corley stated that the city did not accept many storm water easements of some properties annexed into the city of Hoover.
However, there is an opportunity to do work on private property under "public purpose". The notion of public purpose is that it promotes public safety, health, prosperity, etc. and general welfare of the community. It must benefit a significant part of the public not just one individual or a few individuals. (Hoover Sun November 19, 2021 by Jon Anderson)
https://hooversun.com/news/engineering-consultant-shares-findings-on-green-valley-bluff/